1 // This file is part of OpenCV project.
2 // It is subject to the license terms in the LICENSE file found in the top-level directory
3 // of this distribution and at http://opencv.org/license.html.
5 // Copyright (C) 2017, Intel Corporation, all rights reserved.
6 // Third party copyrights are property of their respective owners.
9 Implementation of padding layer, which adds paddings to input blob.
12 #include "../precomp.hpp"
13 #include "layers_common.hpp"
14 #include "../op_halide.hpp"
15 #include "../op_inf_engine.hpp"
23 class PaddingLayerImpl CV_FINAL : public PaddingLayer
26 PaddingLayerImpl(const LayerParams ¶ms)
28 setParamsFrom(params);
29 paddingValue = params.get<float>("value", 0);
30 inputDims = params.get<int>("input_dims", -1);
31 paddingType = params.get<String>("type", "constant");
33 CV_Assert(params.has("paddings"));
34 const DictValue& paddingsParam = params.get("paddings");
35 CV_Assert((paddingsParam.size() & 1) == 0);
37 paddings.resize(paddingsParam.size() / 2);
38 for (int i = 0; i < paddings.size(); ++i)
40 paddings[i].first = paddingsParam.get<int>(i * 2); // Pad before.
41 paddings[i].second = paddingsParam.get<int>(i * 2 + 1); // Pad after.
42 CV_Assert_N(paddings[i].first >= 0, paddings[i].second >= 0);
46 bool getMemoryShapes(const std::vector<MatShape> &inputs,
47 const int requiredOutputs,
48 std::vector<MatShape> &outputs,
49 std::vector<MatShape> &internals) const CV_OVERRIDE
51 CV_Assert(inputs.size() == 1);
52 const MatShape& inpShape = inputs[0];
53 CV_Assert(inpShape.size() >= paddings.size());
54 CV_Assert(inputDims == -1 || inpShape.size() == inputDims || inpShape.size() > paddings.size());
56 outputs.resize(1, inpShape);
57 int offset = (inputDims == -1 ? 0 : (inpShape.size() > inputDims ? 1 : 0));
58 for (int i = 0; i < paddings.size(); ++i)
60 outputs[0][offset + i] = inpShape[offset + i] + paddings[i].first + paddings[i].second;
65 void finalize(InputArrayOfArrays inputs_arr, OutputArrayOfArrays) CV_OVERRIDE
67 std::vector<Mat> inputs;
68 inputs_arr.getMatVector(inputs);
71 const MatSize& inpShape = inputs[0].size;
73 if (inputDims != -1 && inputs[0].dims != inputDims)
75 paddings.insert(paddings.begin(), std::make_pair(0, 0));
78 dstRanges.resize(paddings.size());
79 for (int i = 0; i < paddings.size(); ++i)
81 dstRanges[i].start = paddings[i].first;
82 dstRanges[i].end = paddings[i].first + inpShape[i];
85 // Add the rest of dimensions.
86 for (int i = dstRanges.size(); i < inputs[0].dims; ++i)
88 dstRanges.push_back(Range::all());
89 paddings.push_back(std::make_pair(0, 0));
91 inputDims = -1; // Next time paddings are filled for all the dimensions.
94 virtual bool supportBackend(int backendId) CV_OVERRIDE
96 #ifdef HAVE_INF_ENGINE
97 if (backendId == DNN_BACKEND_INFERENCE_ENGINE)
98 return INF_ENGINE_VER_MAJOR_GE(INF_ENGINE_RELEASE_2019R1) &&
99 (preferableTarget != DNN_TARGET_MYRIAD ||
100 (dstRanges.size() == 4 && paddings[0].first == 0 && paddings[0].second == 0));
102 return backendId == DNN_BACKEND_OPENCV ||
103 (backendId == DNN_BACKEND_HALIDE && haveHalide() && dstRanges.size() == 4);
106 void forward(InputArrayOfArrays inputs_arr, OutputArrayOfArrays outputs_arr, OutputArrayOfArrays internals_arr) CV_OVERRIDE
109 CV_TRACE_ARG_VALUE(name, "name", name.c_str());
111 std::vector<Mat> inputs, outputs;
112 inputs_arr.getMatVector(inputs);
113 outputs_arr.getMatVector(outputs);
115 if (paddingType == "constant")
117 if (inputs_arr.depth() == CV_16S)
119 std::vector<float> paddingValue_fp32(1, paddingValue);
120 std::vector<int16_t> paddingValue_fp16(1);
121 cv::convertFp16(paddingValue_fp32, paddingValue_fp16);
122 outputs[0].setTo(paddingValue_fp16[0]);
125 outputs[0].setTo(paddingValue);
126 inputs[0].copyTo(outputs[0](dstRanges));
128 else if (paddingType == "reflect")
130 CV_Assert(inputs.size() == 1);
131 CV_Assert(outputs.size() == 1);
132 CV_Assert(inputs[0].dims == 4);
133 CV_Assert(outputs[0].dims == 4);
135 if (inputs[0].size[0] != outputs[0].size[0] || inputs[0].size[1] != outputs[0].size[1])
136 CV_Error(Error::StsNotImplemented, "Only spatial reflection padding is supported.");
138 const int inpHeight = inputs[0].size[2];
139 const int inpWidth = inputs[0].size[3];
140 const int outHeight = outputs[0].size[2];
141 const int outWidth = outputs[0].size[3];
142 const int padTop = dstRanges[2].start;
143 const int padBottom = outHeight - dstRanges[2].end;
144 const int padLeft = dstRanges[3].start;
145 const int padRight = outWidth - dstRanges[3].end;
146 CV_CheckLT(padTop, inpHeight, ""); CV_CheckLT(padBottom, inpHeight, "");
147 CV_CheckLT(padLeft, inpWidth, ""); CV_CheckLT(padRight, inpWidth, "");
149 for (size_t n = 0; n < inputs[0].size[0]; ++n)
151 for (size_t ch = 0; ch < inputs[0].size[1]; ++ch)
153 copyMakeBorder(getPlane(inputs[0], n, ch),
154 getPlane(outputs[0], n, ch),
155 padTop, padBottom, padLeft, padRight,
161 CV_Error(Error::StsNotImplemented, "Unknown padding type: " + paddingType);
164 virtual Ptr<BackendNode> initHalide(const std::vector<Ptr<BackendWrapper> > &inputs) CV_OVERRIDE
167 int inW, inH, inC, inN;
168 int minN = std::max(dstRanges[0].start, 0);
169 int minC = std::max(dstRanges[1].start, 0);
170 int minY = std::max(dstRanges[2].start, 0);
171 int minX = std::max(dstRanges[3].start, 0);
172 Halide::Buffer<float> inputBuffer = halideBuffer(inputs[0]);
173 getCanonicalSize(inputBuffer, &inW, &inH, &inC, &inN);
175 Halide::Var x("x"), y("y"), c("c"), n("n");
176 Halide::Func top = (name.empty() ? Halide::Func() : Halide::Func(name));
177 Halide::Func padded =
178 Halide::BoundaryConditions::constant_exterior(inputBuffer, paddingValue);
179 top(x, y, c, n) = padded(x - minX, y - minY, c - minC, n - minN);
180 return Ptr<BackendNode>(new HalideBackendNode(top));
181 #endif // HAVE_HALIDE
182 return Ptr<BackendNode>();
185 #ifdef HAVE_INF_ENGINE
186 virtual Ptr<BackendNode> initInfEngine(const std::vector<Ptr<BackendWrapper> >&) CV_OVERRIDE
188 InferenceEngine::Builder::Layer ieLayer(name);
189 ieLayer.setName(name);
190 ieLayer.setType("Pad");
192 std::vector<int> begins(paddings.size(), 0), ends(paddings.size(), 0);
193 for (int i = 0; i < paddings.size(); ++i)
195 begins[i] = paddings[i].first;
196 ends[i] = paddings[i].second;
198 ieLayer.getParameters()["pads_begin"] = begins;
199 ieLayer.getParameters()["pads_end"] = ends;
200 ieLayer.getParameters()["pad_mode"] = paddingType;
201 if (paddingType == "constant")
202 ieLayer.getParameters()["pad_value"] = paddingValue;
204 ieLayer.setInputPorts(std::vector<InferenceEngine::Port>(1));
205 ieLayer.setOutputPorts(std::vector<InferenceEngine::Port>(1));
206 return Ptr<BackendNode>(new InfEngineBackendNode(ieLayer));
211 std::vector<std::pair<int, int> > paddings; // Pairs pad before, pad after.
212 std::vector<Range> dstRanges;
215 std::string paddingType;
218 Ptr<PaddingLayer> PaddingLayer::create(const LayerParams ¶ms)
220 return Ptr<PaddingLayer>(new PaddingLayerImpl(params));