I think proposal_list[h]=-1 should also be set when imax_overlap < iou_thresh

[hqy479]

def image_eval(pred, gt, ignore, iou_thresh):
""" single image evaluation
pred: Nx5
gt: Nx4
ignore:
"""

_pred = pred.copy()
_gt = gt.copy()
pred_recall = np.zeros(_pred.shape[0])
recall_list = np.zeros(_gt.shape[0])
proposal_list = np.ones(_pred.shape[0])

# _pred[:, 2] = _pred[:, 2] + _pred[:, 0]
# _pred[:, 3] = _pred[:, 3] + _pred[:, 1]
_gt[:, 2] = _gt[:, 2] + _gt[:, 0]
_gt[:, 3] = _gt[:, 3] + _gt[:, 1]

overlaps = bbox_overlaps(_pred[:, :4], _gt)

for h in range(_pred.shape[0]):
    gt_overlap = overlaps[h] 
    max_overlap, max_idx = gt_overlap.max(), gt_overlap.argmax()
    **if max_overlap >= iou_thresh:** 
        if ignore[max_idx] == 0:
            recall_list[max_idx] = -1
            **proposal_list[h] = -1**
        elif recall_list[max_idx] == 0:
            recall_list[max_idx] = 1

    r_keep_index = np.where(recall_list == 1)[0]
    pred_recall[h] = len(r_keep_index)
return pred_recall, proposal_list