def test_iou(self):
iou = np_box_mask_list_ops.iou(self.box_mask_list1,
self.box_mask_list2)
expected_iou = np.array(
[[1.0, 0.0, 8.0 / 25.0], [0.0, 9.0 / 16.0, 7.0 / 28.0]],
dtype=float)
self.assertAllClose(iou, expected_iou)
def _compute_is_class_correctly_detected_in_image(self,
detected_boxes,
detected_scores,
groundtruth_boxes,
detected_masks=None,
groundtruth_masks=None):
"""Compute CorLoc score for a single class.
Args:
detected_boxes: A numpy array of shape [N, 4] representing detected box
coordinates
detected_scores: A 1-d numpy array of length N representing classification
score
groundtruth_boxes: A numpy array of shape [M, 4] representing ground truth
box coordinates
detected_masks: (optional) A np.uint8 numpy array of shape
[N, height, width]. If not None, the scores will be computed based
on masks.
groundtruth_masks: (optional) A np.uint8 numpy array of shape
[M, height, width].
Returns:
is_class_correctly_detected_in_image: An integer 1 or 0 denoting whether a
class is correctly detected in the image or not
"""
if detected_boxes.size > 0:
if groundtruth_boxes.size > 0:
max_score_id = np.argmax(detected_scores)
mask_mode = False
if detected_masks is not None and groundtruth_masks is not None:
mask_mode = True
if mask_mode:
detected_boxlist = np_box_mask_list.BoxMaskList(
box_data=np.expand_dims(detected_boxes[max_score_id],
axis=0),
mask_data=np.expand_dims(detected_masks[max_score_id],
axis=0))
gt_boxlist = np_box_mask_list.BoxMaskList(
box_data=groundtruth_boxes,
mask_data=groundtruth_masks)
iou = np_box_mask_list_ops.iou(detected_boxlist,
gt_boxlist)
else:
detected_boxlist = np_box_list.BoxList(
np.expand_dims(detected_boxes[max_score_id, :],
axis=0))
gt_boxlist = np_box_list.BoxList(groundtruth_boxes)
iou = np_box_list_ops.iou(detected_boxlist, gt_boxlist)
if np.max(iou) >= self.matching_iou_threshold:
return 1
return 0
def _get_overlaps_and_scores_mask_mode(self, detected_boxes,
detected_scores, detected_masks,
groundtruth_boxes,
groundtruth_masks,
groundtruth_is_group_of_list):
"""Computes overlaps and scores between detected and groudntruth masks.
Args:
detected_boxes: A numpy array of shape [N, 4] representing detected box
coordinates
detected_scores: A 1-d numpy array of length N representing classification
score
detected_masks: A uint8 numpy array of shape [N, height, width]. If not
None, the scores will be computed based on masks.
groundtruth_boxes: A numpy array of shape [M, 4] representing ground truth
box coordinates
groundtruth_masks: A uint8 numpy array of shape [M, height, width].
groundtruth_is_group_of_list: A boolean numpy array of length M denoting
whether a ground truth box has group-of tag. If a groundtruth box
is group-of box, every detection matching this box is ignored.
Returns:
iou: A float numpy array of size [num_detected_boxes, num_gt_boxes]. If
gt_non_group_of_boxlist.num_boxes() == 0 it will be None.
ioa: A float numpy array of size [num_detected_boxes, num_gt_boxes]. If
gt_group_of_boxlist.num_boxes() == 0 it will be None.
scores: The score of the detected boxlist.
num_boxes: Number of non-maximum suppressed detected boxes.
"""
detected_boxlist = np_box_mask_list.BoxMaskList(
box_data=detected_boxes, mask_data=detected_masks)
detected_boxlist.add_field('scores', detected_scores)
detected_boxlist = np_box_mask_list_ops.non_max_suppression(
detected_boxlist, self.nms_max_output_boxes,
self.nms_iou_threshold)
gt_non_group_of_boxlist = np_box_mask_list.BoxMaskList(
box_data=groundtruth_boxes[~groundtruth_is_group_of_list],
mask_data=groundtruth_masks[~groundtruth_is_group_of_list])
gt_group_of_boxlist = np_box_mask_list.BoxMaskList(
box_data=groundtruth_boxes[groundtruth_is_group_of_list],
mask_data=groundtruth_masks[groundtruth_is_group_of_list])
iou = np_box_mask_list_ops.iou(detected_boxlist,
gt_non_group_of_boxlist)
ioa = np.transpose(
np_box_mask_list_ops.ioa(gt_group_of_boxlist, detected_boxlist))
scores = detected_boxlist.get_field('scores')
num_boxes = detected_boxlist.num_boxes()
return iou, ioa, scores, num_boxes