cherry-pick update_cascade, test=dygraph (#2206)

dygraph/configs/cascade_rcnn/_base_/cascade_fpn_reader.yml

 worker_num: 2
 TrainReader:
   sample_transforms:
-  - DecodeOp: { }
-  - RandomFlipImage: {prob: 0.5}
-  - NormalizeImage: {is_channel_first: false, is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
-  - ResizeImage: {target_size: 800, max_size: 1333, interp: 1, use_cv2: true}
-  - Permute: {to_bgr: false, channel_first: true}
+  - DecodeOp: {}
+  - RandomResizeOp: {target_size: [[640, 1333], [672, 1333], [704, 1333], [736, 1333], [768, 1333], [800, 1333]], interp: 2, keep_ratio: True}
+  - RandomFlipOp: {prob: 0.5}
+  - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
+  - PermuteOp: {}
   batch_transforms:
-  - PadBatch: {pad_to_stride: 32, use_padded_im_info: false, pad_gt: true}
+  - PadBatchOp: {pad_to_stride: 32, pad_gt: true}
   batch_size: 1
   shuffle: true
   drop_last: true
@@ -15,12 +15,12 @@ TrainReader:
 
 EvalReader:
   sample_transforms:
-  - DecodeOp: { }
-  - NormalizeImageOp: { is_scale: true, mean: [ 0.485,0.456,0.406 ], std: [ 0.229, 0.224,0.225 ] }
-  - ResizeOp: { interp: 1, target_size: [ 800, 1333 ], keep_ratio: True }
-  - PermuteOp: { }
+  - DecodeOp: {}
+  - ResizeOp: {interp: 2, target_size: [800, 1333], keep_ratio: True}
+  - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
+  - PermuteOp: {}
   batch_transforms:
-  - PadBatchOp: { pad_to_stride: 32, pad_gt: false }
+  - PadBatchOp: {pad_to_stride: 32, pad_gt: false}
   batch_size: 1
   shuffle: false
   drop_last: false
@@ -29,12 +29,12 @@ EvalReader:
 
 TestReader:
   sample_transforms:
-  - DecodeOp: { }
-  - NormalizeImageOp: { is_scale: true, mean: [ 0.485,0.456,0.406 ], std: [ 0.229, 0.224,0.225 ] }
-  - ResizeOp: { interp: 1, target_size: [ 800, 1333 ], keep_ratio: True }
-  - PermuteOp: { }
+  - DecodeOp: {}
+  - ResizeOp: {interp: 2, target_size: [800, 1333], keep_ratio: True}
+  - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
+  - PermuteOp: {}
   batch_transforms:
-  - PadBatchOp: { pad_to_stride: 32, pad_gt: false }
+  - PadBatchOp: {pad_to_stride: 32, pad_gt: false}
   batch_size: 1
   shuffle: false
   drop_last: false

dygraph/configs/cascade_rcnn/_base_/cascade_mask_fpn_reader.yml

@@ -2,12 +2,12 @@ worker_num: 2
 TrainReader:
   sample_transforms:
   - DecodeOp: {}
-  - RandomFlipImage: {prob: 0.5, is_mask_flip: true}
-  - NormalizeImage: {is_channel_first: false, is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
-  - ResizeImage: {target_size: 800, max_size: 1333, interp: 1, use_cv2: true}
-  - Permute: {to_bgr: false, channel_first: true}
+  - RandomResizeOp: {target_size: [[640, 1333], [672, 1333], [704, 1333], [736, 1333], [768, 1333], [800, 1333]], interp: 2, keep_ratio: True}
+  - RandomFlipOp: {prob: 0.5}
+  - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
+  - PermuteOp: {}
   batch_transforms:
-  - PadBatch: {pad_to_stride: 32, use_padded_im_info: false, pad_gt: true}
+  - PadBatchOp: {pad_to_stride: 32, pad_gt: true}
   batch_size: 1
   shuffle: true
   drop_last: true
@@ -16,8 +16,8 @@ TrainReader:
 EvalReader:
   sample_transforms:
   - DecodeOp: {}
+  - ResizeOp: {interp: 2, target_size: [800, 1333], keep_ratio: True}
   - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
-  - ResizeOp: {interp: 1, target_size: [800, 1333], keep_ratio: True}
   - PermuteOp: {}
   batch_transforms:
   - PadBatchOp: {pad_to_stride: 32, pad_gt: false}
@@ -30,8 +30,8 @@ EvalReader:
 TestReader:
   sample_transforms:
   - DecodeOp: {}
+  - ResizeOp: {interp: 2, target_size: [800, 1333], keep_ratio: True}
   - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
-  - ResizeOp: {interp: 1, target_size: [800, 1333], keep_ratio: True}
   - PermuteOp: {}
   batch_transforms:
   - PadBatchOp: {pad_to_stride: 32, pad_gt: false}

dygraph/configs/cascade_rcnn/_base_/cascade_mask_rcnn_r50_fpn.yml

 architecture: CascadeRCNN
 pretrain_weights: https://paddle-imagenet-models-name.bj.bcebos.com/ResNet50_cos_pretrained.tar
 load_static_weights: True
-roi_stages: 3
 
-# Model Achitecture
+
 CascadeRCNN:
-  # model anchor info flow
-  anchor: Anchor
-  proposal: Proposal
-  mask: Mask
-  # model feat info flow
   backbone: ResNet
   neck: FPN
   rpn_head: RPNHead
-  bbox_head: BBoxHead
+  bbox_head: CascadeHead
   mask_head: MaskHead
   # post process
   bbox_post_process: BBoxPostProcess
@@ -28,97 +22,78 @@ ResNet:
   num_stages: 4
 
 FPN:
-  in_channels: [256, 512, 1024, 2048]
   out_channel: 256
-  min_level: 0
-  max_level: 4
-  spatial_scale: [0.25, 0.125, 0.0625, 0.03125]
 
 RPNHead:
-  rpn_feat:
-    name: RPNFeat
-    feat_in: 256
-    feat_out: 256
-  anchor_per_position: 3
-  rpn_channel: 256
-
-Anchor:
   anchor_generator:
-    name: AnchorGeneratorRPN
     aspect_ratios: [0.5, 1.0, 2.0]
-    anchor_start_size: 32
-    stride: [4., 4.]
-  anchor_target_generator:
-    name: AnchorTargetGeneratorRPN
+    anchor_sizes: [[32], [64], [128], [256], [512]]
+    strides: [4, 8, 16, 32, 64]
+  rpn_target_assign:
     batch_size_per_im: 256
     fg_fraction: 0.5
     negative_overlap: 0.3
     positive_overlap: 0.7
-    straddle_thresh: 0.0
-
-Proposal:
-  proposal_generator:
-    name: ProposalGenerator
+    use_random: True
+  train_proposal:
     min_size: 0.0
     nms_thresh: 0.7
-    train_pre_nms_top_n: 2000
-    train_post_nms_top_n: 2000
-    infer_pre_nms_top_n: 1000
-    infer_post_nms_top_n: 1000
-  proposal_target_generator:
-    name: ProposalTargetGenerator
-    batch_size_per_im: 512
-    bbox_reg_weights: [0.1, 0.1, 0.2, 0.2]
-    bg_thresh_hi: [0.5, 0.6, 0.7]
-    bg_thresh_lo: [0.0, 0.0, 0.0]
-    fg_thresh: [0.5, 0.6, 0.7]
-    fg_fraction: 0.25
-    is_cls_agnostic: true
+    pre_nms_top_n: 2000
+    post_nms_top_n: 2000
+    topk_after_collect: True
+  test_proposal:
+    min_size: 0.0
+    nms_thresh: 0.7
+    pre_nms_top_n: 1000
+    post_nms_top_n: 1000
+
 
-BBoxHead:
-  bbox_feat:
-    name: BBoxFeat
-    roi_extractor:
-      name: RoIAlign
-      resolution: 7
-      sampling_ratio: 2
-    head_feat:
-      name: TwoFCHead
-      in_dim: 256
-      mlp_dim: 1024
-  in_feat: 1024
-  cls_agnostic: true
+CascadeHead:
+  head: CascadeTwoFCHead
+  roi_extractor:
+    resolution: 7
+    sampling_ratio: 0
+    aligned: True
+  bbox_assigner: BBoxAssigner
+
+BBoxAssigner:
+  batch_size_per_im: 512
+  bg_thresh: 0.5
+  fg_thresh: 0.5
+  fg_fraction: 0.25
+  cascade_iou: [0.5, 0.6, 0.7]
+  use_random: True
+
+CascadeTwoFCHead:
+  mlp_dim: 1024
 
 BBoxPostProcess:
   decode:
     name: RCNNBox
-    num_classes: 81
-    batch_size: 1
-    var_weight: 3.
+    prior_box_var: [30.0, 30.0, 15.0, 15.0]
   nms:
     name: MultiClassNMS
     keep_top_k: 100
     score_threshold: 0.05
     nms_threshold: 0.5
+    normalized: true
 
-Mask:
-  mask_target_generator:
-    name: MaskTargetGenerator
-    mask_resolution: 28
 
 MaskHead:
-  mask_feat:
-    name: MaskFeat
-    num_convs: 4
-    feat_in: 256
-    feat_out: 256
-    mask_roi_extractor:
-      name: RoIAlign
-      resolution: 14
-      sampling_ratio: 2
-    share_bbox_feat: False
-  feat_in: 256
+  head: MaskFeat
+  roi_extractor:
+    resolution: 14
+    sampling_ratio: 0
+    aligned: True
+  mask_assigner: MaskAssigner
+  share_bbox_feat: False
 
+MaskFeat:
+  num_convs: 4
+  out_channels: 256
 
-MaskPostProcess:
+MaskAssigner:
   mask_resolution: 28
+
+MaskPostProcess:
+  binary_thresh: 0.5

dygraph/configs/cascade_rcnn/_base_/cascade_rcnn_r50_fpn.yml

 architecture: CascadeRCNN
 pretrain_weights: https://paddle-imagenet-models-name.bj.bcebos.com/ResNet50_cos_pretrained.tar
 load_static_weights: True
-roi_stages: 3
 
-# Model Achitecture
+
 CascadeRCNN:
-  # model anchor info flow
-  anchor: Anchor
-  proposal: Proposal
-  # model feat info flow
   backbone: ResNet
   neck: FPN
   rpn_head: RPNHead
-  bbox_head: BBoxHead
+  bbox_head: CascadeHead
   # post process
   bbox_post_process: BBoxPostProcess
 
@@ -25,75 +20,58 @@ ResNet:
   num_stages: 4
 
 FPN:
-  in_channels: [256, 512, 1024, 2048]
   out_channel: 256
-  min_level: 0
-  max_level: 4
-  spatial_scale: [0.25, 0.125, 0.0625, 0.03125]
 
 RPNHead:
-  rpn_feat:
-    name: RPNFeat
-    feat_in: 256
-    feat_out: 256
-  anchor_per_position: 3
-  rpn_channel: 256
-
-Anchor:
   anchor_generator:
-    name: AnchorGeneratorRPN
     aspect_ratios: [0.5, 1.0, 2.0]
-    anchor_start_size: 32
-    stride: [4., 4.]
-  anchor_target_generator:
-    name: AnchorTargetGeneratorRPN
+    anchor_sizes: [[32], [64], [128], [256], [512]]
+    strides: [4, 8, 16, 32, 64]
+  rpn_target_assign:
     batch_size_per_im: 256
     fg_fraction: 0.5
     negative_overlap: 0.3
     positive_overlap: 0.7
-    straddle_thresh: 0.0
-
-Proposal:
-  proposal_generator:
-    name: ProposalGenerator
+    use_random: True
+  train_proposal:
+    min_size: 0.0
+    nms_thresh: 0.7
+    pre_nms_top_n: 2000
+    post_nms_top_n: 2000
+    topk_after_collect: True
+  test_proposal:
     min_size: 0.0
     nms_thresh: 0.7
-    train_pre_nms_top_n: 2000
-    train_post_nms_top_n: 2000
-    infer_pre_nms_top_n: 1000
-    infer_post_nms_top_n: 1000
-  proposal_target_generator:
-    name: ProposalTargetGenerator
-    batch_size_per_im: 512
-    bbox_reg_weights: [0.1, 0.1, 0.2, 0.2]
-    bg_thresh_hi: [0.5, 0.6, 0.7]
-    bg_thresh_lo: [0.0, 0.0, 0.0]
-    fg_thresh: [0.5, 0.6, 0.7]
-    fg_fraction: 0.25
-    is_cls_agnostic: true
+    pre_nms_top_n: 1000
+    post_nms_top_n: 1000
+
+
+CascadeHead:
+  head: CascadeTwoFCHead
+  roi_extractor:
+    resolution: 7
+    sampling_ratio: 0
+    aligned: True
+  bbox_assigner: BBoxAssigner
+
+BBoxAssigner:
+  batch_size_per_im: 512
+  bg_thresh: 0.5
+  fg_thresh: 0.5
+  fg_fraction: 0.25
+  cascade_iou: [0.5, 0.6, 0.7]
+  use_random: True
 
-BBoxHead:
-  bbox_feat:
-    name: BBoxFeat
-    roi_extractor:
-      name: RoIAlign
-      resolution: 7
-      sampling_ratio: 2
-    head_feat:
-      name: TwoFCHead
-      in_dim: 256
-      mlp_dim: 1024
-  in_feat: 1024
-  cls_agnostic: true
+CascadeTwoFCHead:
+  mlp_dim: 1024
 
 BBoxPostProcess:
   decode:
     name: RCNNBox
-    num_classes: 81
-    batch_size: 1
-    var_weight: 3.
+    prior_box_var: [30.0, 30.0, 15.0, 15.0]
   nms:
     name: MultiClassNMS
     keep_top_k: 100
     score_threshold: 0.05
     nms_threshold: 0.5
+    normalized: true

dygraph/configs/cascade_rcnn/_base_/optimizer_1x.yml

@@ -7,8 +7,8 @@ LearningRate:
     gamma: 0.1
     milestones: [8, 11]
   - !LinearWarmup
-    start_factor: 0.3333333333333333
-    steps: 500
+    start_factor: 0.001
+    steps: 1000
 
 OptimizerBuilder:
   optimizer:

dygraph/configs/faster_rcnn/_base_/faster_rcnn_r50.yml

@@ -53,8 +53,8 @@ BBoxHead:
 
 BBoxAssigner:
   batch_size_per_im: 512
-  bg_thresh: [0.5,]
-  fg_thresh: [0.5,]
+  bg_thresh: 0.5
+  fg_thresh: 0.5
   fg_fraction: 0.25
   use_random: True
 

dygraph/configs/faster_rcnn/_base_/faster_rcnn_r50_fpn.yml

@@ -56,8 +56,8 @@ BBoxHead:
 
 BBoxAssigner:
   batch_size_per_im: 512
-  bg_thresh: [0.5,]
-  fg_thresh: [0.5,]
+  bg_thresh: 0.5
+  fg_thresh: 0.5
   fg_fraction: 0.25
   use_random: True
 

dygraph/configs/mask_rcnn/_base_/mask_fpn_reader.yml

@@ -3,7 +3,7 @@ TrainReader:
   sample_transforms:
   - DecodeOp: {}
   - RandomResizeOp: {target_size: [[640, 1333], [672, 1333], [704, 1333], [736, 1333], [768, 1333], [800, 1333]], interp: 2, keep_ratio: True}
-  - RandomFlipOp: {prob: 0.5, is_mask_flip: true}
+  - RandomFlipOp: {prob: 0.5}
   - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
   - PermuteOp: {}
   batch_transforms:

dygraph/configs/mask_rcnn/_base_/mask_rcnn_r50.yml

@@ -54,8 +54,8 @@ BBoxHead:
 
 BBoxAssigner:
   batch_size_per_im: 512
-  bg_thresh: [0.5,]
-  fg_thresh: [0.5,]
+  bg_thresh: 0.5
+  fg_thresh: 0.5
   fg_fraction: 0.25
   use_random: True
 

dygraph/configs/mask_rcnn/_base_/mask_rcnn_r50_fpn.yml

@@ -56,8 +56,8 @@ BBoxHead:
 
 BBoxAssigner:
   batch_size_per_im: 512
-  bg_thresh: [0.5,]
-  fg_thresh: [0.5,]
+  bg_thresh: 0.5
+  fg_thresh: 0.5
   fg_fraction: 0.25
   use_random: True
 

dygraph/configs/mask_rcnn/_base_/mask_reader.yml

@@ -3,7 +3,7 @@ TrainReader:
   sample_transforms:
   - DecodeOp: {}
   - RandomResizeOp: {target_size: [[640, 1333], [672, 1333], [704, 1333], [736, 1333], [768, 1333], [800, 1333]], interp: 2, keep_ratio: True}
-  - RandomFlipOp: {prob: 0.5, is_mask_flip: true}
+  - RandomFlipOp: {prob: 0.5}
   - NormalizeImageOp: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
   - PermuteOp: {}
   batch_transforms:

dygraph/ppdet/data/transform/operator.py

@@ -484,17 +484,14 @@ class AutoAugmentOp(BaseOperator):
 
 @register_op
 class RandomFlipOp(BaseOperator):
-    def __init__(self, prob=0.5, is_mask_flip=False):
+    def __init__(self, prob=0.5):
         """
         Args:
             prob (float): the probability of flipping image
-            is_mask_flip (bool): whether flip the segmentation
         """
         super(RandomFlipOp, self).__init__()
         self.prob = prob
-        self.is_mask_flip = is_mask_flip
-        if not (isinstance(self.prob, float) and
-                isinstance(self.is_mask_flip, bool)):
+        if not isinstance(self.prob, float):
             raise TypeError("{}: input type is invalid.".format(self))
 
     def apply_segm(self, segms, height, width):
@@ -557,8 +554,7 @@ class RandomFlipOp(BaseOperator):
             im = self.apply_image(im)
             if 'gt_bbox' in sample and len(sample['gt_bbox']) > 0:
                 sample['gt_bbox'] = self.apply_bbox(sample['gt_bbox'], width)
-            if self.is_mask_flip and 'gt_poly' in sample and len(sample[
-                    'gt_poly']) > 0:
+            if 'gt_poly' in sample and len(sample['gt_poly']) > 0:
                 sample['gt_poly'] = self.apply_segm(sample['gt_poly'], height,
                                                     width)
             if 'gt_keypoint' in sample and len(sample['gt_keypoint']) > 0:

dygraph/ppdet/modeling/architectures/cascade_rcnn.py

@@ -17,7 +17,7 @@ from __future__ import division
 from __future__ import print_function
 
 import paddle
-from ppdet.core.workspace import register
+from ppdet.core.workspace import register, create
 from .meta_arch import BaseArch
 
 __all__ = ['CascadeRCNN']
@@ -26,142 +26,106 @@ __all__ = ['CascadeRCNN']
 @register
 class CascadeRCNN(BaseArch):
     __category__ = 'architecture'
-    __shared__ = ['roi_stages']
     __inject__ = [
-        'anchor',
-        'proposal',
-        'mask',
-        'backbone',
-        'neck',
-        'rpn_head',
-        'bbox_head',
-        'mask_head',
         'bbox_post_process',
         'mask_post_process',
     ]
 
     def __init__(self,
-                 anchor,
-                 proposal,
                  backbone,
                  rpn_head,
                  bbox_head,
                  bbox_post_process,
                  neck=None,
-                 mask=None,
                  mask_head=None,
-                 mask_post_process=None,
-                 roi_stages=3):
+                 mask_post_process=None):
         super(CascadeRCNN, self).__init__()
-        self.anchor = anchor
-        self.proposal = proposal
         self.backbone = backbone
         self.rpn_head = rpn_head
         self.bbox_head = bbox_head
         self.bbox_post_process = bbox_post_process
         self.neck = neck
-        self.mask = mask
         self.mask_head = mask_head
         self.mask_post_process = mask_post_process
-        self.roi_stages = roi_stages
-        self.with_mask = mask is not None
+        self.with_mask = mask_head is not None
+
+    @classmethod
+    def from_config(cls, cfg, *args, **kwargs):
+        backbone = create(cfg['backbone'])
+        kwargs = {'input_shape': backbone.out_shape}
+        neck = cfg['neck'] and create(cfg['neck'], **kwargs)
+
+        out_shape = neck and neck.out_shape or backbone.out_shape
+        kwargs = {'input_shape': out_shape}
+        rpn_head = create(cfg['rpn_head'], **kwargs)
+        bbox_head = create(cfg['bbox_head'], **kwargs)
+
+        out_shape = neck and out_shape or bbox_head.get_head().out_shape
+        kwargs = {'input_shape': out_shape}
+        mask_head = cfg['mask_head'] and create(cfg['mask_head'], **kwargs)
+        return {
+            'backbone': backbone,
+            'neck': neck,
+            "rpn_head": rpn_head,
+            "bbox_head": bbox_head,
+            "mask_head": mask_head,
+        }
 
-    def model_arch(self, ):
-        # Backbone
+    def _forward(self):
         body_feats = self.backbone(self.inputs)
-
-        # Neck
         if self.neck is not None:
-            body_feats, spatial_scale = self.neck(body_feats)
-
-        # RPN
-        # rpn_head returns two list: rpn_feat, rpn_head_out 
-        # each element in rpn_feats contains rpn feature on each level,
-        # and the length is 1 when the neck is not applied.
-        # each element in rpn_head_out contains (rpn_rois_score, rpn_rois_delta)
-        rpn_feat, self.rpn_head_out = self.rpn_head(self.inputs, body_feats)
-
-        # Anchor
-        # anchor_out returns a list,
-        # each element contains (anchor, anchor_var)
-        self.anchor_out = self.anchor(rpn_feat)
-
-        # Proposal RoI
-        # compute targets here when training
-        rois = None
-        bbox_head_out = None
-        max_overlap = None
-        self.bbox_head_list = []
-        rois_list = []
-        for i in range(self.roi_stages):
-            # Proposal BBox
-            rois = self.proposal(
-                self.inputs,
-                self.rpn_head_out,
-                self.anchor_out,
-                self.training,
-                i,
-                rois,
-                bbox_head_out,
-                max_overlap=max_overlap)
-            rois_list.append(rois)
-            max_overlap = self.proposal.get_max_overlap()
-            # BBox Head
-            bbox_feat, bbox_head_out, _ = self.bbox_head(body_feats, rois,
-                                                         spatial_scale, i)
-            self.bbox_head_list.append(bbox_head_out)
-
-        if not self.training:
-            bbox_pred, bboxes = self.bbox_head.get_cascade_prediction(
-                self.bbox_head_list, rois_list)
-            self.bboxes = self.bbox_post_process(bbox_pred, bboxes,
-                                                 self.inputs['im_shape'],
-                                                 self.inputs['scale_factor'])
-
-        if self.with_mask:
-            rois = rois_list[-1]
-            rois_has_mask_int32 = None
-            if self.training:
-                bbox_targets = self.proposal.get_targets()[-1]
-                self.bboxes, rois_has_mask_int32 = self.mask(self.inputs, rois,
-                                                             bbox_targets)
-            # Mask Head 
-            self.mask_head_out = self.mask_head(
-                self.inputs, body_feats, self.bboxes, bbox_feat,
-                rois_has_mask_int32, spatial_scale)
+            body_feats = self.neck(body_feats)
+
+        if self.training:
+            rois, rois_num, rpn_loss = self.rpn_head(body_feats, self.inputs)
+            bbox_loss, bbox_feat = self.bbox_head(body_feats, rois, rois_num,
+                                                  self.inputs)
+            rois, rois_num = self.bbox_head.get_assigned_rois()
+            bbox_targets = self.bbox_head.get_assigned_targets()
+            if self.with_mask:
+                mask_loss = self.mask_head(body_feats, rois, rois_num,
+                                           self.inputs, bbox_targets, bbox_feat)
+                return rpn_loss, bbox_loss, mask_loss
+            else:
+                return rpn_loss, bbox_loss, {}
+        else:
+            rois, rois_num, _ = self.rpn_head(body_feats, self.inputs)
+            preds, _ = self.bbox_head(body_feats, rois, rois_num, self.inputs)
+            refined_rois = self.bbox_head.get_refined_rois()
+
+            im_shape = self.inputs['im_shape']
+            scale_factor = self.inputs['scale_factor']
+
+            bbox, bbox_num = self.bbox_post_process(
+                preds, (refined_rois, rois_num), im_shape, scale_factor)
+            # rescale the prediction back to origin image
+            bbox_pred = self.bbox_post_process.get_pred(bbox, bbox_num,
+                                                        im_shape, scale_factor)
+            if not self.with_mask:
+                return bbox_pred, bbox_num, None
+            mask_out = self.mask_head(body_feats, bbox, bbox_num, self.inputs)
+            origin_shape = self.bbox_post_process.get_origin_shape()
+            mask_pred = self.mask_post_process(mask_out[:, 0, :, :], bbox_pred,
+                                               bbox_num, origin_shape)
+            return bbox_pred, bbox_num, mask_pred
 
     def get_loss(self, ):
+        rpn_loss, bbox_loss, mask_loss = self._forward()
         loss = {}
-
-        # RPN loss
-        rpn_loss_inputs = self.anchor.generate_loss_inputs(
-            self.inputs, self.rpn_head_out, self.anchor_out)
-        loss_rpn = self.rpn_head.get_loss(rpn_loss_inputs)
-        loss.update(loss_rpn)
-
-        # BBox loss
-        bbox_targets_list = self.proposal.get_targets()
-        loss_bbox = self.bbox_head.get_loss(self.bbox_head_list,
-                                            bbox_targets_list)
-        loss.update(loss_bbox)
-
+        loss.update(rpn_loss)
+        loss.update(bbox_loss)
         if self.with_mask:
-            # Mask loss
-            mask_targets = self.mask.get_targets()
-            loss_mask = self.mask_head.get_loss(self.mask_head_out,
-                                                mask_targets)
-            loss.update(loss_mask)
-
+            loss.update(mask_loss)
         total_loss = paddle.add_n(list(loss.values()))
         loss.update({'loss': total_loss})
         return loss
 
     def get_pred(self):
-        bbox, bbox_num = self.bboxes
+        bbox_pred, bbox_num, mask_pred = self._forward()
         output = {
-            'bbox': bbox,
+            'bbox': bbox_pred,
             'bbox_num': bbox_num,
         }
         if self.with_mask:
-            output.update({'mask': self.mask_head_out})
+            output.update({'mask': mask_pred})
         return output

dygraph/ppdet/modeling/backbones/resnet.py

@@ -547,11 +547,8 @@ class Res5Head(nn.Layer):
         if depth < 50:
             feat_in = 256
         na = NameAdapter(self)
-        self.res5 = self.add_sublayer(
-            'res5_roi_feat',
-            Blocks(
-                depth, feat_in, feat_out, count=3, name_adapter=na,
-                stage_num=5))
+        self.res5 = Blocks(
+            depth, feat_in, feat_out, count=3, name_adapter=na, stage_num=5)
         self.feat_out = feat_out if depth < 50 else feat_out * 4
 
     @property

dygraph/ppdet/modeling/bbox_utils.py

@@ -64,7 +64,7 @@ def delta2bbox(deltas, boxes, weights):
     pred_boxes.append(pred_ctr_y - 0.5 * pred_h)
     pred_boxes.append(pred_ctr_x + 0.5 * pred_w)
     pred_boxes.append(pred_ctr_y + 0.5 * pred_h)
-    pred_boxes = paddle.stack(pred_boxes, axis=-1)
+    pred_boxes = paddle.concat(pred_boxes, axis=-1)
 
     return pred_boxes
 
@@ -88,7 +88,7 @@ def expand_bbox(bboxes, scale):
 
 
 def clip_bbox(boxes, im_shape):
-    h, w = im_shape
+    h, w = im_shape[0], im_shape[1]
     x1 = boxes[:, 0].clip(0, w)
     y1 = boxes[:, 1].clip(0, h)
     x2 = boxes[:, 2].clip(0, w)

dygraph/ppdet/modeling/heads/__init__.py

@@ -20,6 +20,7 @@ from . import ssd_head
 from . import fcos_head
 from . import solov2_head
 from . import ttf_head
+from . import cascade_head
 
 from .bbox_head import *
 from .mask_head import *
@@ -29,3 +30,4 @@ from .ssd_head import *
 from .fcos_head import *
 from .solov2_head import *
 from .ttf_head import *
+from .cascade_head import *

dygraph/ppdet/modeling/heads/bbox_head.py

@@ -33,19 +33,16 @@ class TwoFCHead(nn.Layer):
         self.in_dim = in_dim
         self.mlp_dim = mlp_dim
         fan = in_dim * resolution * resolution
-        lr_factor = 1.
         self.fc6 = nn.Linear(
             in_dim * resolution * resolution,
             mlp_dim,
             weight_attr=paddle.ParamAttr(
-                learning_rate=lr_factor,
                 initializer=XavierUniform(fan_out=fan)))
 
         self.fc7 = nn.Linear(
             mlp_dim,
             mlp_dim,
-            weight_attr=paddle.ParamAttr(
-                learning_rate=lr_factor, initializer=XavierUniform()))
+            weight_attr=paddle.ParamAttr(initializer=XavierUniform()))
 
     @classmethod
     def from_config(cls, cfg, input_shape):
@@ -73,6 +70,12 @@ class BBoxHead(nn.Layer):
     """
     head (nn.Layer): Extract feature in bbox head
     in_channel (int): Input channel after RoI extractor
+    roi_extractor (object): The module of RoI Extractor
+    bbox_assigner (object): The module of Box Assigner, label and sample the 
+                            box.
+    with_pool (bool): Whether to use pooling for the RoI feature.
+    num_classes (int): The number of classes
+    bbox_weight (List[float]): The weight to get the decode box 
     """
 
     def __init__(self,
@@ -98,17 +101,14 @@ class BBoxHead(nn.Layer):
         self.bbox_score = nn.Linear(
             in_channel,
             self.num_classes + 1,
-            weight_attr=paddle.ParamAttr(
-                learning_rate=lr_factor, initializer=Normal(
-                    mean=0.0, std=0.01)))
+            weight_attr=paddle.ParamAttr(initializer=Normal(
+                mean=0.0, std=0.01)))
 
         self.bbox_delta = nn.Linear(
             in_channel,
             4 * self.num_classes,
-            weight_attr=paddle.ParamAttr(
-                learning_rate=lr_factor,
-                initializer=Normal(
-                    mean=0.0, std=0.001)))
+            weight_attr=paddle.ParamAttr(initializer=Normal(
+                mean=0.0, std=0.001)))
         self.assigned_label = None
         self.assigned_rois = None
 
@@ -128,14 +128,13 @@ class BBoxHead(nn.Layer):
 
     def forward(self, body_feats=None, rois=None, rois_num=None, inputs=None):
         """
-        body_feats (list[Tensor]):
-        rois (Tensor):
-        rois_num (Tensor):
-        inputs (dict{Tensor}):
+        body_feats (list[Tensor]): Feature maps from backbone
+        rois (Tensor): RoIs generated from RPN module
+        rois_num (Tensor): The number of RoIs in each image
+        inputs (dict{Tensor}): The ground-truth of image
         """
         if self.training:
-            rois, rois_num, _, targets = self.bbox_assigner(rois, rois_num,
-                                                            inputs)
+            rois, rois_num, targets = self.bbox_assigner(rois, rois_num, inputs)
             self.assigned_rois = (rois, rois_num)
             self.assigned_targets = targets
 
@@ -150,13 +149,14 @@ class BBoxHead(nn.Layer):
         deltas = self.bbox_delta(feat)
 
         if self.training:
-            loss = self.get_loss(scores, deltas, targets, rois)
+            loss = self.get_loss(scores, deltas, targets, rois,
+                                 self.bbox_weight)
             return loss, bbox_feat
         else:
             pred = self.get_prediction(scores, deltas)
             return pred, self.head
 
-    def get_loss(self, scores, deltas, targets, rois):
+    def get_loss(self, scores, deltas, targets, rois, bbox_weight):
         """
         scores (Tensor): scores from bbox head outputs
         deltas (Tensor): deltas from bbox head outputs
@@ -179,6 +179,14 @@ class BBoxHead(nn.Layer):
             paddle.logical_and(tgt_labels >= 0, tgt_labels <
                                self.num_classes)).flatten()
 
+        cls_name = 'loss_bbox_cls'
+        reg_name = 'loss_bbox_reg'
+        loss_bbox = {}
+
+        if fg_inds.numel() == 0:
+            loss_bbox[cls_name] = paddle.to_tensor(0., dtype='float32')
+            loss_bbox[reg_name] = paddle.to_tensor(0., dtype='float32')
+            return loss_bbox
         if cls_agnostic_bbox_reg:
             reg_delta = paddle.gather(deltas, fg_inds)
         else:
@@ -198,16 +206,13 @@ class BBoxHead(nn.Layer):
         tgt_bboxes = paddle.concat(tgt_bboxes) if len(
             tgt_bboxes) > 1 else tgt_bboxes[0]
 
-        reg_target = bbox2delta(rois, tgt_bboxes, self.bbox_weight)
+        reg_target = bbox2delta(rois, tgt_bboxes, bbox_weight)
         reg_target = paddle.gather(reg_target, fg_inds)
         reg_target.stop_gradient = True
 
         loss_bbox_reg = paddle.abs(reg_delta - reg_target).sum(
         ) / tgt_labels.shape[0]
 
-        cls_name = 'loss_bbox_cls'
-        reg_name = 'loss_bbox_reg'
-        loss_bbox = {}
         loss_bbox[cls_name] = loss_bbox_cls
         loss_bbox[reg_name] = loss_bbox_reg
 

dygraph/ppdet/modeling/heads/cascade_head.py

+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved. 
+#   
+# Licensed under the Apache License, Version 2.0 (the "License");   
+# you may not use this file except in compliance with the License.  
+# You may obtain a copy of the License at   
+#   
+#     http://www.apache.org/licenses/LICENSE-2.0    
+#   
+# Unless required by applicable law or agreed to in writing, software   
+# distributed under the License is distributed on an "AS IS" BASIS, 
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  
+# See the License for the specific language governing permissions and   
+# limitations under the License.
+
+import paddle
+import paddle.nn as nn
+import paddle.nn.functional as F
+from paddle.nn.initializer import Normal, XavierUniform
+from paddle.regularizer import L2Decay
+
+from ppdet.core.workspace import register, create
+from ppdet.modeling import ops
+
+from .bbox_head import BBoxHead, TwoFCHead
+from .roi_extractor import RoIAlign
+from ..shape_spec import ShapeSpec
+from ..bbox_utils import bbox2delta, delta2bbox, clip_bbox, nonempty_bbox
+
+
+@register
+class CascadeTwoFCHead(nn.Layer):
+    __shared__ = ['num_cascade_stage']
+
+    def __init__(self,
+                 in_dim=256,
+                 mlp_dim=1024,
+                 resolution=7,
+                 num_cascade_stage=3):
+        super(CascadeTwoFCHead, self).__init__()
+
+        self.in_dim = in_dim
+        self.mlp_dim = mlp_dim
+
+        self.head_list = []
+        for stage in range(num_cascade_stage):
+            head_per_stage = self.add_sublayer(
+                str(stage), TwoFCHead(in_dim, mlp_dim, resolution))
+            self.head_list.append(head_per_stage)
+
+    @classmethod
+    def from_config(cls, cfg, input_shape):
+        s = input_shape
+        s = s[0] if isinstance(s, (list, tuple)) else s
+        return {'in_dim': s.channels}
+
+    @property
+    def out_shape(self):
+        return [ShapeSpec(channels=self.mlp_dim, )]
+
+    def forward(self, rois_feat, stage=0):
+        out = self.head_list[stage](rois_feat)
+        return out
+
+
+@register
+class CascadeHead(BBoxHead):
+    __shared__ = ['num_classes', 'num_cascade_stages']
+    __inject__ = ['bbox_assigner']
+    """
+    head (nn.Layer): Extract feature in bbox head
+    in_channel (int): Input channel after RoI extractor
+    roi_extractor (object): The module of RoI Extractor
+    bbox_assigner (object): The module of Box Assigner, label and sample the 
+                            box.
+    num_classes (int): The number of classes
+    bbox_weight (List[List[float]]): The weight to get the decode box and the 
+                                     length of weight is the number of cascade 
+                                     stage
+    num_cascade_stages (int): THe number of stage to refine the box
+    """
+
+    def __init__(self,
+                 head,
+                 in_channel,
+                 roi_extractor=RoIAlign().__dict__,
+                 bbox_assigner='BboxAssigner',
+                 num_classes=80,
+                 bbox_weight=[[10., 10., 5., 5.], [20.0, 20.0, 10.0, 10.0],
+                              [30.0, 30.0, 15.0, 15.0]],
+                 num_cascade_stages=3):
+        nn.Layer.__init__(self, )
+        self.head = head
+        self.roi_extractor = roi_extractor
+        if isinstance(roi_extractor, dict):
+            self.roi_extractor = RoIAlign(**roi_extractor)
+        self.bbox_assigner = bbox_assigner
+
+        self.num_classes = num_classes
+        self.bbox_weight = bbox_weight
+        self.num_cascade_stages = num_cascade_stages
+
+        self.bbox_score_list = []
+        self.bbox_delta_list = []
+        for i in range(num_cascade_stages):
+            score_name = 'bbox_score_stage{}'.format(i)
+            delta_name = 'bbox_delta_stage{}'.format(i)
+            bbox_score = self.add_sublayer(
+                score_name,
+                nn.Linear(
+                    in_channel,
+                    self.num_classes + 1,
+                    weight_attr=paddle.ParamAttr(initializer=Normal(
+                        mean=0.0, std=0.01))))
+
+            bbox_delta = self.add_sublayer(
+                delta_name,
+                nn.Linear(
+                    in_channel,
+                    4,
+                    weight_attr=paddle.ParamAttr(initializer=Normal(
+                        mean=0.0, std=0.001))))
+            self.bbox_score_list.append(bbox_score)
+            self.bbox_delta_list.append(bbox_delta)
+        self.assigned_label = None
+        self.assigned_rois = None
+
+    def forward(self, body_feats=None, rois=None, rois_num=None, inputs=None):
+        """
+        body_feats (list[Tensor]): Feature maps from backbone
+        rois (Tensor): RoIs generated from RPN module
+        rois_num (Tensor): The number of RoIs in each image
+        inputs (dict{Tensor}): The ground-truth of image
+        """
+        targets = []
+        if self.training:
+            rois, rois_num, targets = self.bbox_assigner(rois, rois_num, inputs)
+            targets_list = [targets]
+            self.assigned_rois = (rois, rois_num)
+            self.assigned_targets = targets
+
+        pred_bbox = None
+        head_out_list = []
+        for i in range(self.num_cascade_stages):
+            if i > 0:
+                rois, rois_num = self._get_rois_from_boxes(pred_bbox,
+                                                           inputs['im_shape'])
+                if self.training:
+                    rois, rois_num, targets = self.bbox_assigner(
+                        rois, rois_num, inputs, i, is_cascade=True)
+                    targets_list.append(targets)
+
+            rois_feat = self.roi_extractor(body_feats, rois, rois_num)
+            bbox_feat = self.head(rois_feat, i)
+            scores = self.bbox_score_list[i](bbox_feat)
+            deltas = self.bbox_delta_list[i](bbox_feat)
+            head_out_list.append([scores, deltas, rois])
+            pred_bbox = self._get_pred_bbox(deltas, rois, self.bbox_weight[i])
+
+        if self.training:
+            loss = {}
+            for stage, value in enumerate(zip(head_out_list, targets_list)):
+                (scores, deltas, rois), targets = value
+                loss_stage = self.get_loss(scores, deltas, targets, rois,
+                                           self.bbox_weight[stage])
+                for k, v in loss_stage.items():
+                    loss[k + "_stage{}".format(
+                        stage)] = v / self.num_cascade_stages
+
+            return loss, bbox_feat
+        else:
+            scores, deltas, self.refined_rois = self.get_prediction(
+                head_out_list)
+            return (deltas, scores), self.head
+
+    def _get_rois_from_boxes(self, boxes, im_shape):
+        rois = []
+        for i, boxes_per_image in enumerate(boxes):
+            clip_box = clip_bbox(boxes_per_image, im_shape[i])
+            if self.training:
+                keep = nonempty_bbox(clip_box)
+                clip_box = paddle.gather(clip_box, keep)
+            rois.append(clip_box)
+        rois_num = paddle.concat([paddle.shape(r)[0] for r in rois])
+        return rois, rois_num
+
+    def _get_pred_bbox(self, deltas, proposals, weights):
+        pred_proposals = paddle.concat(proposals) if len(
+            proposals) > 1 else proposals[0]
+        pred_bbox = delta2bbox(deltas, pred_proposals, weights)
+        num_prop = [p.shape[0] for p in proposals]
+        return pred_bbox.split(num_prop)
+
+    def get_prediction(self, head_out_list):
+        """
+        head_out_list(List[Tensor]): scores, deltas, rois
+        """
+        pred_list = []
+        scores_list = [F.softmax(head[0]) for head in head_out_list]
+        scores = paddle.add_n(scores_list) / self.num_cascade_stages
+        # Get deltas and rois from the last stage
+        _, deltas, rois = head_out_list[-1]
+        return scores, deltas, rois
+
+    def get_refined_rois(self, ):
+        return self.refined_rois

dygraph/ppdet/modeling/layers.py

@@ -291,14 +291,18 @@ class AnchorGeneratorSSD(object):
 @register
 @serializable
 class RCNNBox(object):
+    __shared__ = ['num_classes']
+
     def __init__(self,
                  prior_box_var=[10., 10., 5., 5.],
                  code_type="decode_center_size",
-                 box_normalized=False):
+                 box_normalized=False,
+                 num_classes=80):
         super(RCNNBox, self).__init__()
         self.prior_box_var = prior_box_var
         self.code_type = code_type
         self.box_normalized = box_normalized
+        self.num_classes = num_classes
 
     def __call__(self, bbox_head_out, rois, im_shape, scale_factor):
         bbox_pred, cls_prob = bbox_head_out
@@ -322,6 +326,13 @@ class RCNNBox(object):
             bbox = delta2bbox(bbox_pred, bbox, self.prior_box_var)
         scores = cls_prob[:, :-1]
 
+        # [N*C, 4]
+
+        bbox_num_class = bbox.shape[1] // 4
+        bbox = paddle.reshape(bbox, [-1, bbox_num_class, 4])
+        if bbox_num_class == 1:
+            bbox = paddle.tile(bbox, [1, self.num_classes, 1])
+
         origin_h = paddle.unsqueeze(origin_shape[:, 0], axis=1)
         origin_w = paddle.unsqueeze(origin_shape[:, 1], axis=1)
         zeros = paddle.zeros_like(origin_h)

dygraph/ppdet/modeling/ops.py

@@ -239,7 +239,7 @@ def roi_align(input,
         align_out = core.ops.roi_align(
             input, rois, rois_num, "pooled_height", pooled_height,
             "pooled_width", pooled_width, "spatial_scale", spatial_scale,
-            "sampling_ratio", sampling_ratio)  #, "aligned", aligned)
+            "sampling_ratio", sampling_ratio, "aligned", aligned)
         return align_out
 
     else:
@@ -265,7 +265,7 @@ def roi_align(input,
                 "pooled_width": pooled_width,
                 "spatial_scale": spatial_scale,
                 "sampling_ratio": sampling_ratio,
-                #"aligned": aligned,
+                "aligned": aligned,
             })
         return align_out
 

dygraph/ppdet/modeling/proposal_generator/target.py

@@ -37,7 +37,7 @@ def rpn_anchor_target(anchors,
         gt_bbox = gt_boxes[i]
 
         # Step1: match anchor and gt_bbox
-        matches, match_labels, matched_vals = label_box(
+        matches, match_labels = label_box(
             anchors, gt_bbox, rpn_positive_overlap, rpn_negative_overlap, True)
         # Step2: sample anchor 
         fg_inds, bg_inds = subsample_labels(match_labels, rpn_batch_size_per_im,
@@ -84,8 +84,7 @@ def label_box(anchors, gt_boxes, positive_overlap, negative_overlap,
 
     matches = matches.flatten()
     match_labels = match_labels.flatten()
-    matched_vals = matched_vals.flatten()
-    return matches, match_labels, matched_vals
+    return matches, match_labels
 
 
 def subsample_labels(labels,
@@ -118,16 +117,6 @@ def subsample_labels(labels,
     return fg_inds, bg_inds
 
 
-def filter_roi(rois, max_overlap):
-    ws = rois[:, 2] - rois[:, 0]
-    hs = rois[:, 3] - rois[:, 1]
-    valid_mask = paddle.logical_and(ws > 0, hs > 0, max_overlap < 1)
-    keep = paddle.nonzero(valid_mask)
-    if keep.numel() > 0:
-        return rois[keep[:, 1]]
-    return paddle.zeros((1, 4), dtype='float32')
-
-
 def generate_proposal_target(rpn_rois,
                              gt_classes,
                              gt_boxes,
@@ -137,67 +126,68 @@ def generate_proposal_target(rpn_rois,
                              bg_thresh,
                              num_classes,
                              use_random=True,
-                             is_cascade_rcnn=False,
-                             max_overlaps=None):
+                             is_cascade=False,
+                             cascade_iou=0.5):
 
     rois_with_gt = []
     tgt_labels = []
     tgt_bboxes = []
-    sampled_max_overlaps = []
     tgt_gt_inds = []
     new_rois_num = []
 
+    fg_thresh = cascade_iou if is_cascade else fg_thresh
+    bg_thresh = cascade_iou if is_cascade else bg_thresh
     for i, rpn_roi in enumerate(rpn_rois):
-        max_overlap = max_overlaps[i] if is_cascade_rcnn else None
         gt_bbox = gt_boxes[i]
         gt_class = gt_classes[i]
-        if is_cascade_rcnn:
-            rpn_roi = filter_roi(rpn_roi, max_overlap)
-        bbox = paddle.concat([rpn_roi, gt_bbox])
-
-        # Step1: label bbox 
-        matches, match_labels, matched_vals = label_box(
-            bbox, gt_bbox, fg_thresh, bg_thresh, False)
+        if not is_cascade:
+            bbox = paddle.concat([rpn_roi, gt_bbox])
+        else:
+            bbox = rpn_roi
+
+        # Step1: label bbox
+        matches, match_labels = label_box(bbox, gt_bbox, fg_thresh, bg_thresh,
+                                          False)
         # Step2: sample bbox 
         sampled_inds, sampled_gt_classes = sample_bbox(
             matches, match_labels, gt_class, batch_size_per_im, fg_fraction,
-            num_classes, use_random)
+            num_classes, use_random, is_cascade)
 
         # Step3: make output 
-        rois_per_image = paddle.gather(bbox, sampled_inds)
-        sampled_gt_ind = paddle.gather(matches, sampled_inds)
+        rois_per_image = bbox if is_cascade else paddle.gather(bbox,
+                                                               sampled_inds)
+        sampled_gt_ind = matches if is_cascade else paddle.gather(matches,
+                                                                  sampled_inds)
         sampled_bbox = paddle.gather(gt_bbox, sampled_gt_ind)
-        sampled_overlap = paddle.gather(matched_vals, sampled_inds)
 
         rois_per_image.stop_gradient = True
         sampled_gt_ind.stop_gradient = True
         sampled_bbox.stop_gradient = True
-        sampled_overlap.stop_gradient = True
-
         tgt_labels.append(sampled_gt_classes)
         tgt_bboxes.append(sampled_bbox)
         rois_with_gt.append(rois_per_image)
-        sampled_max_overlaps.append(sampled_overlap)
         tgt_gt_inds.append(sampled_gt_ind)
         new_rois_num.append(paddle.shape(sampled_inds)[0])
     new_rois_num = paddle.concat(new_rois_num)
-    return rois_with_gt, tgt_labels, tgt_bboxes, tgt_gt_inds, new_rois_num, sampled_max_overlaps
+    return rois_with_gt, tgt_labels, tgt_bboxes, tgt_gt_inds, new_rois_num
 
 
-def sample_bbox(
-        matches,
-        match_labels,
-        gt_classes,
-        batch_size_per_im,
-        fg_fraction,
-        num_classes,
-        use_random=True, ):
+def sample_bbox(matches,
+                match_labels,
+                gt_classes,
+                batch_size_per_im,
+                fg_fraction,
+                num_classes,
+                use_random=True,
+                is_cascade=False):
     gt_classes = paddle.gather(gt_classes, matches)
     gt_classes = paddle.where(match_labels == 0,
                               paddle.ones_like(gt_classes) * num_classes,
                               gt_classes)
     gt_classes = paddle.where(match_labels == -1,
                               paddle.ones_like(gt_classes) * -1, gt_classes)
+    if is_cascade:
+        return matches, gt_classes
     rois_per_image = int(batch_size_per_im)
 
     fg_inds, bg_inds = subsample_labels(gt_classes, rois_per_image, fg_fraction,

dygraph/ppdet/modeling/proposal_generator/target_layer.py

@@ -58,10 +58,11 @@ class BBoxAssigner(object):
     def __init__(self,
                  batch_size_per_im=512,
                  fg_fraction=.25,
-                 fg_thresh=[.5, ],
-                 bg_thresh=[.5, ],
+                 fg_thresh=.5,
+                 bg_thresh=.5,
                  use_random=True,
                  is_cls_agnostic=False,
+                 cascade_iou=[0.5, 0.6, 0.7],
                  num_classes=80):
         super(BBoxAssigner, self).__init__()
         self.batch_size_per_im = batch_size_per_im
@@ -70,6 +71,7 @@ class BBoxAssigner(object):
         self.bg_thresh = bg_thresh
         self.use_random = use_random
         self.is_cls_agnostic = is_cls_agnostic
+        self.cascade_iou = cascade_iou
         self.num_classes = num_classes
 
     def __call__(self,
@@ -77,22 +79,21 @@ class BBoxAssigner(object):
                  rpn_rois_num,
                  inputs,
                  stage=0,
-                 max_overlap=None):
+                 is_cascade=False):
         is_cascade = True if stage > 0 else False
         gt_classes = inputs['gt_class']
         gt_boxes = inputs['gt_bbox']
         # rois, tgt_labels, tgt_bboxes, tgt_gt_inds
-        # new_rois_num, sampled_max_overlaps
+        # new_rois_num
         outs = generate_proposal_target(
             rpn_rois, gt_classes, gt_boxes, self.batch_size_per_im,
-            self.fg_fraction, self.fg_thresh[stage], self.bg_thresh[stage],
-            self.num_classes, self.use_random, is_cascade, max_overlap)
+            self.fg_fraction, self.fg_thresh, self.bg_thresh, self.num_classes,
+            self.use_random, is_cascade, self.cascade_iou[stage])
         rois = outs[0]
-        rois_num = outs[-2]
-        max_overlaps = outs[-1]
+        rois_num = outs[-1]
         # tgt_labels, tgt_bboxes, tgt_gt_inds
         targets = outs[1:4]
-        return rois, rois_num, max_overlaps, targets
+        return rois, rois_num, targets
 
 
 @register