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| # Copyright (c) OpenMMLab. All rights reserved. | |
| from ..utils import ext_loader | |
| ext_module = ext_loader.load_ext('_ext', ['box_iou_rotated']) | |
| def box_iou_rotated(bboxes1, bboxes2, mode='iou', aligned=False): | |
| """Return intersection-over-union (Jaccard index) of boxes. | |
| Both sets of boxes are expected to be in | |
| (x_center, y_center, width, height, angle) format. | |
| If ``aligned`` is ``False``, then calculate the ious between each bbox | |
| of bboxes1 and bboxes2, otherwise the ious between each aligned pair of | |
| bboxes1 and bboxes2. | |
| Arguments: | |
| boxes1 (Tensor): rotated bboxes 1. \ | |
| It has shape (N, 5), indicating (x, y, w, h, theta) for each row. | |
| Note that theta is in radian. | |
| boxes2 (Tensor): rotated bboxes 2. \ | |
| It has shape (M, 5), indicating (x, y, w, h, theta) for each row. | |
| Note that theta is in radian. | |
| mode (str): "iou" (intersection over union) or iof (intersection over | |
| foreground). | |
| Returns: | |
| ious(Tensor): shape (N, M) if aligned == False else shape (N,) | |
| """ | |
| assert mode in ['iou', 'iof'] | |
| mode_dict = {'iou': 0, 'iof': 1} | |
| mode_flag = mode_dict[mode] | |
| rows = bboxes1.size(0) | |
| cols = bboxes2.size(0) | |
| if aligned: | |
| ious = bboxes1.new_zeros(rows) | |
| else: | |
| ious = bboxes1.new_zeros((rows * cols)) | |
| bboxes1 = bboxes1.contiguous() | |
| bboxes2 = bboxes2.contiguous() | |
| ext_module.box_iou_rotated( | |
| bboxes1, bboxes2, ious, mode_flag=mode_flag, aligned=aligned) | |
| if not aligned: | |
| ious = ious.view(rows, cols) | |
| return ious | |