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ppocr/ext_op/roi_align_rotated/roi_align_rotated.py

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+# copyright (c) 2022 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+This code is refer from:
+https://github.com/open-mmlab/mmcv/blob/master/mmcv/ops/roi_align_rotated.py
+"""
+
+import paddle
+import paddle.nn as nn
+from paddle.utils.cpp_extension import load
+
+custom_ops = load(
+    name="custom_jit_ops",
+    sources=[
+        "ppocr/ext_op/roi_align_rotated/roi_align_rotated.cc",
+        "ppocr/ext_op/roi_align_rotated/roi_align_rotated.cu",
+    ],
+)
+
+roi_align_rotated = custom_ops.roi_align_rotated
+
+
+class RoIAlignRotated(nn.Layer):
+    """RoI align pooling layer for rotated proposals."""
+
+    def __init__(
+        self, out_size, spatial_scale, sample_num=0, aligned=True, clockwise=False
+    ):
+        super(RoIAlignRotated, self).__init__()
+
+        if isinstance(out_size, int):
+            self.out_h = out_size
+            self.out_w = out_size
+        elif isinstance(out_size, tuple):
+            assert len(out_size) == 2
+            assert isinstance(out_size[0], int)
+            assert isinstance(out_size[1], int)
+            self.out_h, self.out_w = out_size
+        else:
+            raise TypeError('"out_size" must be an integer or tuple of integers')
+
+        self.spatial_scale = float(spatial_scale)
+        self.sample_num = int(sample_num)
+        self.aligned = aligned
+        self.clockwise = clockwise
+
+    def forward(self, feats, rois):
+        output = roi_align_rotated(
+            feats,
+            rois,
+            self.out_h,
+            self.out_w,
+            self.spatial_scale,
+            self.sample_num,
+            self.aligned,
+            self.clockwise,
+        )
+        return output