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https://github.com/open-mmlab/mmsegmentation.git
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6ba4696648
Thanks for your contribution and we appreciate it a lot. The following instructions would make your pull request more healthy and more easily get feedback. If you do not understand some items, don't worry, just make the pull request and seek help from maintainers. ## Motivation fix #2593 ## Modification 1. Only when gt seg map is 2D, extend its shape to 3D PixelData 2. If seg map is not 2D, we raised warning for users. --------- Co-authored-by: xiexinch <xiexinch@outlook.com>
108 lines
3.9 KiB
Python
108 lines
3.9 KiB
Python
# Copyright (c) OpenMMLab. All rights reserved.
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import warnings
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import numpy as np
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from mmcv.transforms import to_tensor
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from mmcv.transforms.base import BaseTransform
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from mmengine.structures import PixelData
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from mmseg.registry import TRANSFORMS
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from mmseg.structures import SegDataSample
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@TRANSFORMS.register_module()
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class PackSegInputs(BaseTransform):
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"""Pack the inputs data for the semantic segmentation.
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The ``img_meta`` item is always populated. The contents of the
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``img_meta`` dictionary depends on ``meta_keys``. By default this includes:
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- ``img_path``: filename of the image
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- ``ori_shape``: original shape of the image as a tuple (h, w, c)
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- ``img_shape``: shape of the image input to the network as a tuple \
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(h, w, c). Note that images may be zero padded on the \
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bottom/right if the batch tensor is larger than this shape.
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- ``pad_shape``: shape of padded images
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- ``scale_factor``: a float indicating the preprocessing scale
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- ``flip``: a boolean indicating if image flip transform was used
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- ``flip_direction``: the flipping direction
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Args:
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meta_keys (Sequence[str], optional): Meta keys to be packed from
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``SegDataSample`` and collected in ``data[img_metas]``.
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Default: ``('img_path', 'ori_shape',
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'img_shape', 'pad_shape', 'scale_factor', 'flip',
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'flip_direction')``
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"""
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def __init__(self,
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meta_keys=('img_path', 'seg_map_path', 'ori_shape',
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'img_shape', 'pad_shape', 'scale_factor', 'flip',
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'flip_direction')):
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self.meta_keys = meta_keys
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def transform(self, results: dict) -> dict:
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"""Method to pack the input data.
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Args:
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results (dict): Result dict from the data pipeline.
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Returns:
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dict:
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- 'inputs' (obj:`torch.Tensor`): The forward data of models.
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- 'data_sample' (obj:`SegDataSample`): The annotation info of the
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sample.
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"""
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packed_results = dict()
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if 'img' in results:
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img = results['img']
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if len(img.shape) < 3:
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img = np.expand_dims(img, -1)
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if not img.flags.c_contiguous:
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img = to_tensor(np.ascontiguousarray(img.transpose(2, 0, 1)))
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else:
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img = img.transpose(2, 0, 1)
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img = to_tensor(img).contiguous()
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packed_results['inputs'] = img
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data_sample = SegDataSample()
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if 'gt_seg_map' in results:
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if results['gt_seg_map'].shape == 2:
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data = to_tensor(results['gt_seg_map'][None,
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...].astype(np.int64))
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else:
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warnings.warn('Please pay attention your ground truth '
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'segmentation map, usually the segentation '
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'map is 2D, but got '
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f'{results["gt_seg_map"].shape}')
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data = to_tensor(results['gt_seg_map'].astype(np.int64))
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gt_sem_seg_data = dict(data=data)
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data_sample.gt_sem_seg = PixelData(**gt_sem_seg_data)
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if 'gt_edge_map' in results:
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gt_edge_data = dict(
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data=to_tensor(results['gt_edge_map'][None,
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...].astype(np.int64)))
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data_sample.set_data(dict(gt_edge_map=PixelData(**gt_edge_data)))
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img_meta = {}
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for key in self.meta_keys:
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if key in results:
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img_meta[key] = results[key]
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data_sample.set_metainfo(img_meta)
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packed_results['data_samples'] = data_sample
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return packed_results
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def __repr__(self) -> str:
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repr_str = self.__class__.__name__
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repr_str += f'(meta_keys={self.meta_keys})'
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return repr_str
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