fix code in mask rcnn for py3 (#1765)

* fix code in mask rcnn for py3

* fix bug in face detection

fluid/PaddleCV/face_detection/widerface_eval.py

@@ -121,7 +121,7 @@ def detect_face(image, shrink):
                          return_numpy=False)
     detection = np.array(detection)
     # layout: xmin, ymin, xmax. ymax, score
-    if detection.shape == (1, ):
+    if np.prod(detection.shape) == 1:
         print("No face detected")
         return np.array([[0, 0, 0, 0, 0]])
     det_conf = detection[:, 1]

fluid/PaddleCV/rcnn/eval_helper.py

@@ -185,7 +185,7 @@ def get_segms_res(batch_size, lod, segms_out, data, num_id_to_cat_id_map):
             cat_id = num_id_to_cat_id_map[num_id]
             if six.PY3:
                 if 'counts' in segm:
-                    segm['counts'] = rle['counts'].decode("utf8")
+                    segm['counts'] = segm['counts'].decode("utf8")
             segm_res = {
                 'image_id': image_id,
                 'category_id': cat_id,

fluid/PaddleCV/rcnn/models/model_builder.py

@@ -19,8 +19,6 @@ from paddle.fluid.initializer import Normal
 from paddle.fluid.initializer import MSRA
 from paddle.fluid.regularizer import L2Decay
 from config import cfg
-import cPickle as cp
-import numpy as np
 
 
 class RCNN(object):
@@ -43,6 +41,8 @@ class RCNN(object):
         self.rpn_heads(body_conv)
         # Fast RCNN
         self.fast_rcnn_heads(body_conv)
+        if not self.is_train:
+            self.eval_bbox()
         # Mask RCNN
         if cfg.MASK_ON:
             self.mask_rcnn_heads(body_conv)
@@ -298,8 +298,6 @@ class RCNN(object):
                                              name='bbox_pred_b',
                                              learning_rate=2.,
                                              regularizer=L2Decay(0.)))
-        if not self.is_train:
-            self.eval_bbox()
 
     def SuffixNet(self, conv5):
         mask_out = fluid.layers.conv2d_transpose(