import six import os import numpy as np from numba import jit from .bbox import delta2bbox, clip_bbox, expand_bbox, nms import pycocotools.mask as mask_util import cv2 def bbox_post_process(bboxes, bbox_prob, bbox_deltas, im_info, keep_top_k=100, score_thresh=0.05, nms_thresh=0.5, class_nums=81, bbox_reg_weights=[0.1, 0.1, 0.2, 0.2], with_background=True): bbox, bbox_num = bboxes new_bbox = [[] for _ in range(len(bbox_num))] new_bbox_num = [] st_num = 0 end_num = 0 for i in range(len(bbox_num)): box_num = bbox_num[i] end_num += box_num boxes = bbox[st_num:end_num, :] # bbox boxes = boxes / im_info[i][2] # scale bbox_delta = bbox_deltas[st_num:end_num, :, :] # bbox delta bbox_delta = np.reshape(bbox_delta, (box_num, -1)) # step1: decode boxes = delta2bbox(bbox_delta, boxes, bbox_reg_weights) # step2: clip boxes = clip_bbox(boxes, im_info[i][:2] / im_info[i][2]) # step3: nms cls_boxes = [[] for _ in range(class_nums)] scores_n = bbox_prob[st_num:end_num, :] for j in range(with_background, class_nums): inds = np.where(scores_n[:, j] > score_thresh)[0] scores_j = scores_n[inds, j] rois_j = boxes[inds, j * 4:(j + 1) * 4] dets_j = np.hstack((scores_j[:, np.newaxis], rois_j)).astype( np.float32, copy=False) keep = nms(dets_j, nms_thresh) nms_dets = dets_j[keep, :] #add labels label = np.array([j for _ in range(len(keep))]) nms_dets = np.hstack((label[:, np.newaxis], nms_dets)).astype( np.float32, copy=False) cls_boxes[j] = nms_dets st_num += box_num # Limit to max_per_image detections **over all classes** image_scores = np.hstack( [cls_boxes[j][:, 1] for j in range(with_background, class_nums)]) if len(image_scores) > keep_top_k: image_thresh = np.sort(image_scores)[-keep_top_k] for j in range(with_background, class_nums): keep = np.where(cls_boxes[j][:, 1] >= image_thresh)[0] cls_boxes[j] = cls_boxes[j][keep, :] new_bbox_n = np.vstack( [cls_boxes[j] for j in range(with_background, class_nums)]) new_bbox[i] = new_bbox_n new_bbox_num.append(len(new_bbox_n)) new_bbox = np.vstack([new_bbox[k] for k in range(len(bbox_num))]) new_bbox_num = np.array(new_bbox_num).astype('int32') return new_bbox, new_bbox_num @jit def mask_post_process(bboxes, masks, im_info, resolution=14, binary_thresh=0.5): if masks.shape[0] == 0: return masks bbox, bbox_nums = bboxes M = resolution scale = (M + 2.0) / M boxes = bbox[:, 2:] labels = bbox[:, 0] segms_results = [[] for _ in range(len(bbox_nums))] sum = 0 st_num = 0 end_num = 0 for i in range(len(bbox_nums)): bbox_num = bbox_nums[i] end_num += bbox_num cls_segms = [] boxes_n = boxes[st_num:end_num] labels_n = labels[st_num:end_num] masks_n = masks[st_num:end_num] im_h = int(round(im_info[i][0] / im_info[i][2])) im_w = int(round(im_info[i][1] / im_info[i][2])) boxes_n = expand_bbox(boxes_n, scale) boxes_n = boxes_n.astype(np.int32) padded_mask = np.zeros((M + 2, M + 2), dtype=np.float32) for j in range(len(boxes_n)): class_id = int(labels_n[j]) padded_mask[1:-1, 1:-1] = masks_n[j, class_id, :, :] ref_box = boxes_n[j, :] w = ref_box[2] - ref_box[0] + 1 h = ref_box[3] - ref_box[1] + 1 w = np.maximum(w, 1) h = np.maximum(h, 1) mask = cv2.resize(padded_mask, (w, h)) mask = np.array(mask > binary_thresh, dtype=np.uint8) im_mask = np.zeros((im_h, im_w), dtype=np.uint8) x_0 = max(ref_box[0], 0) x_1 = min(ref_box[2] + 1, im_w) y_0 = max(ref_box[1], 0) y_1 = min(ref_box[3] + 1, im_h) im_mask[y_0:y_1, x_0:x_1] = mask[(y_0 - ref_box[1]):(y_1 - ref_box[ 1]), (x_0 - ref_box[0]):(x_1 - ref_box[0])] sum += im_mask.sum() rle = mask_util.encode( np.array( im_mask[:, :, np.newaxis], order='F'))[0] cls_segms.append(rle) segms_results[i] = np.array(cls_segms)[:, np.newaxis] st_num += bbox_num segms_results = np.vstack([segms_results[k] for k in range(len(bbox_nums))]) bboxes = np.hstack([segms_results, bbox]) return bboxes[:, :3] @jit def get_det_res(bboxes, bbox_nums, image_id, num_id_to_cat_id_map): det_res = [] k = 0 for i in range(len(bbox_nums)): image_id = int(image_id[i][0]) det_nums = bbox_nums[i] for j in range(det_nums): dt = bboxes[k] k = k + 1 num_id, score, xmin, ymin, xmax, ymax = dt.tolist() category_id = num_id_to_cat_id_map[num_id] w = xmax - xmin + 1 h = ymax - ymin + 1 bbox = [xmin, ymin, w, h] dt_res = { 'image_id': image_id, 'category_id': category_id, 'bbox': bbox, 'score': score } det_res.append(dt_res) return det_res @jit def get_seg_res(masks, mask_nums, image_id, num_id_to_cat_id_map): seg_res = [] k = 0 for i in range(len(mask_nums)): image_id = int(image_id[i][0]) det_nums = mask_nums[i] for j in range(det_nums): dt = masks[k] k = k + 1 sg, num_id, score = dt.tolist() cat_id = num_id_to_cat_id_map[num_id] if six.PY3: if 'counts' in sg: sg['counts'] = sg['counts'].decode("utf8") sg_res = { 'image_id': image_id, 'category_id': cat_id, 'segmentation': sg, 'score': score } seg_res.append(sg_res) return seg_res