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/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* 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.
*/
#include "roi_pool_f_op.h"
namespace caffe2 {
REGISTER_CPU_OPERATOR(RoIPoolF, RoIPoolFOp<float, CPUContext>);
REGISTER_CPU_OPERATOR(RoIPoolFGradient, RoIPoolFGradientOp<float, CPUContext>);
OPERATOR_SCHEMA(RoIPoolF)
.NumInputs(2)
.NumOutputs(2)
.SetDoc(R"DOC(
Region of Interest (RoI) pooling operation as used in Fast R-CNN.
)DOC")
.Arg(
"spatial_scale",
"(float) default 1.0; Spatial scale of the input feature map X "
"relative to the input image. E.g., 0.0625 if X has a stride of 16 "
"w.r.t. the input image.")
.Arg(
"pooled_h",
"(int) default 1; Pooled output Y's height.")
.Arg(
"pooled_w",
"(int) default 1; Pooled output Y's width.")
.Input(
0,
"X",
"4D feature map input of shape (N, C, H, W).")
.Input(
1,
"RoIs",
"2D input of shape (R, 5) specifying R RoIs with five columns "
"representing: batch index in [0, N - 1], x1, y1, x2, y2. The RoI "
"coordinates are in the coordinate system of the input image.")
.Output(
0,
"Y",
"4D output of shape (R, C, pooled_h, pooled_w). The r-th batch element "
"is a pooled feature map cooresponding to the r-th RoI.")
.Output(
1,
"argmaxes",
"4D output of shape (R, C, pooled_h, pooled_w). Same as Y, except it "
"records the argmax indices rather than the max pooled values.");
OPERATOR_SCHEMA(RoIPoolFGradient)
.NumInputs(4)
.NumOutputs(1)
.Input(
0,
"X",
"See RoIPoolF.")
.Input(
1,
"RoIs",
"See RoIPoolF.")
.Input(
2,
"argmaxes",
"See RoIPoolF.")
.Input(
3,
"dY",
"Gradient of forward output 0 (Y)")
.Output(
0,
"dX",
"Gradient of forward input 0 (X)");
class GetRoIPoolFGradient : public GradientMakerBase {
using GradientMakerBase::GradientMakerBase;
vector<OperatorDef> GetGradientDefs() override {
return SingleGradientDef(
"RoIPoolFGradient",
"",
vector<string>{I(0), I(1), O(1), GO(0)},
vector<string>{GI(0)});
}
};
REGISTER_GRADIENT(RoIPoolF, GetRoIPoolFGradient);
} // namespace caffe2
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