modules/dnn/src/onnx/onnx_importer.cpp

   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.
   4
   5 // Copyright (C) 2018, Intel Corporation, all rights reserved.
   6 // Third party copyrights are property of their respective owners.
   7
   8 #include "../precomp.hpp"
   9 #include <opencv2/dnn/shape_utils.hpp>
  10
  11 #ifdef HAVE_PROTOBUF
  12
  13 #include <iostream>
  14 #include <fstream>
  15 #include <string>
  16 #include <limits>
  17 #include <algorithm>
  18
  19
  20 #if defined(__GNUC__) && __GNUC__ >= 5
  21 #pragma GCC diagnostic push
  22 #pragma GCC diagnostic ignored "-Wsuggest-override"
  23 #endif
  24 #include "opencv-onnx.pb.h"
  25 #if defined(__GNUC__) && __GNUC__ >= 5
  26 #pragma GCC diagnostic pop
  27 #endif
  28
  29 namespace cv {
  30 namespace dnn {
  31 CV__DNN_EXPERIMENTAL_NS_BEGIN
  32
  33
  34 class ONNXImporter
  35 {
  36     opencv_onnx::ModelProto model_proto;
  37     struct LayerInfo {
  38         int layerId;
  39         int outputId;
  40         LayerInfo(int _layerId, int _outputId) : layerId(_layerId), outputId(_outputId) {}
  41     };
  42
  43     std::map<std::string, Mat> getGraphTensors(
  44                                     const opencv_onnx::GraphProto& graph_proto);
  45     Mat getBlob(const opencv_onnx::NodeProto& node_proto, const std::map<std::string, Mat>& constBlobs, int index);
  46
  47     LayerParams getLayerParams(const opencv_onnx::NodeProto& node_proto);
  48     bool isCeilMode(const LayerParams& layerParams);
  49
  50 public:
  51
  52     ONNXImporter(const char *onnxFile)
  53     {
  54         std::fstream input(onnxFile, std::ios::in | std::ios::binary);
  55
  56         if (!model_proto.ParseFromIstream(&input))
  57             CV_Error(Error::StsUnsupportedFormat, "Failed to parse onnx model");
  58     }
  59
  60     ONNXImporter(const char* buffer, size_t sizeBuffer)
  61     {
  62         struct _Buf : public std::streambuf
  63         {
  64             _Buf(const char* buffer, size_t sizeBuffer)
  65             {
  66                 char* p = const_cast<char*>(buffer);
  67                 setg(p, p, p + sizeBuffer);
  68             }
  69         };
  70
  71         _Buf buf(buffer, sizeBuffer);
  72         std::istream input(&buf);
  73
  74         if (!model_proto.ParseFromIstream(&input))
  75             CV_Error(Error::StsUnsupportedFormat, "Failed to parse onnx model from in-memory byte array.");
  76     }
  77
  78     void populateNet(Net dstNet);
  79 };
  80
  81 inline void replaceLayerParam(LayerParams& layerParams, const String& oldKey, const String& newKey)
  82 {
  83     if (layerParams.has(oldKey)) {
  84         layerParams.set(newKey, layerParams.get(oldKey));
  85         layerParams.erase(oldKey);
  86     }
  87 }
  88
  89 void releaseONNXTensor(opencv_onnx::TensorProto& tensor_proto)
  90 {
  91     if (!tensor_proto.raw_data().empty()) {
  92         delete tensor_proto.release_raw_data();
  93     }
  94 }
  95
  96 template<typename T1, typename T2>
  97 void convertInt64ToInt32(const T1& src, T2& dst, int size)
  98 {
  99     for (int i = 0; i < size; i++) {
 100         if (src[i] < std::numeric_limits<int32_t>::min() || src[i] > std::numeric_limits<int32_t>::max()) {
 101             CV_Error(Error::StsOutOfRange, "Input is out of OpenCV 32S range");
 102         }
 103         dst[i] = saturate_cast<int32_t>(src[i]);
 104     }
 105 }
 106
 107 Mat getMatFromTensor(opencv_onnx::TensorProto& tensor_proto)
 108 {
 109     CV_Assert(!tensor_proto.raw_data().empty() || !tensor_proto.float_data().empty()
 110                     || !tensor_proto.double_data().empty() || !tensor_proto.int64_data().empty());
 111
 112     opencv_onnx::TensorProto_DataType datatype = tensor_proto.data_type();
 113     Mat blob;
 114     std::vector<int> sizes;
 115     for (int i = 0; i < tensor_proto.dims_size(); i++) {
 116             sizes.push_back(tensor_proto.dims(i));
 117     }
 118     if (sizes.empty())
 119         sizes.assign(1, 1);
 120     if (datatype == opencv_onnx::TensorProto_DataType_FLOAT) {
 121
 122         if (!tensor_proto.float_data().empty()) {
 123             const ::google::protobuf::RepeatedField<float> field = tensor_proto.float_data();
 124             Mat(sizes, CV_32FC1, (void*)field.data()).copyTo(blob);
 125         }
 126         else {
 127             char* val = const_cast<char*>(tensor_proto.raw_data().c_str());
 128             Mat(sizes, CV_32FC1, val).copyTo(blob);
 129         }
 130     }
 131     else if (datatype == opencv_onnx::TensorProto_DataType_DOUBLE)
 132     {
 133         const ::google::protobuf::RepeatedField<double> field = tensor_proto.double_data();
 134         CV_Assert(!field.empty());
 135         Mat(sizes, CV_64FC1, (void*)field.data()).convertTo(blob, CV_32FC1);
 136     }
 137     else if (datatype == opencv_onnx::TensorProto_DataType_INT64)
 138     {
 139         blob.create(sizes, CV_32SC1);
 140         int32_t* dst = reinterpret_cast<int32_t*>(blob.data);
 141
 142         if (!tensor_proto.int64_data().empty()) {
 143             ::google::protobuf::RepeatedField< ::google::protobuf::int64> src = tensor_proto.int64_data();
 144             convertInt64ToInt32(src, dst, blob.total());
 145         }
 146         else
 147         {
 148             char* val = const_cast<char*>(tensor_proto.raw_data().c_str());
 149             int64_t* src = reinterpret_cast<int64_t*>(val);
 150             convertInt64ToInt32(src, dst, blob.total());
 151         }
 152     }
 153     else
 154         CV_Error(Error::StsUnsupportedFormat, "Unsupported data type: " +
 155                         opencv_onnx::TensorProto_DataType_Name(datatype));
 156     if (tensor_proto.dims_size() == 0)
 157         blob.dims = 1;  // To force 1-dimensional cv::Mat for scalars.
 158     return blob;
 159 }
 160
 161 void runLayer(LayerParams& params, const std::vector<Mat>& inputs,
 162               std::vector<Mat>& outputs)
 163 {
 164     Ptr<Layer> layer = LayerFactory::createLayerInstance(params.type, params);
 165     CV_Assert((bool)layer);
 166
 167     std::vector<MatShape> inpShapes(inputs.size());
 168     int ddepth = CV_32F;
 169     for (size_t i = 0; i < inputs.size(); ++i)
 170     {
 171         inpShapes[i] = shape(inputs[i]);
 172         if (i > 0 && ddepth != inputs[i].depth())
 173             CV_Error(Error::StsNotImplemented, "Mixed input data types.");
 174         ddepth = inputs[i].depth();
 175     }
 176
 177     std::vector<MatShape> outShapes, internalShapes;
 178     layer->getMemoryShapes(inpShapes, 0, outShapes, internalShapes);
 179
 180     std::vector<Mat> internals(internalShapes.size());
 181     outputs.resize(outShapes.size());
 182     for (size_t i = 0; i < outShapes.size(); ++i)
 183         outputs[i].create(outShapes[i], ddepth);
 184     for (size_t i = 0; i < internalShapes.size(); ++i)
 185         internals[i].create(internalShapes[i], ddepth);
 186
 187     layer->finalize(inputs, outputs);
 188     layer->forward(inputs, outputs, internals);
 189 }
 190
 191 std::map<std::string, Mat> ONNXImporter::getGraphTensors(
 192                                         const opencv_onnx::GraphProto& graph_proto)
 193 {
 194   opencv_onnx::TensorProto tensor_proto;
 195   std::map<std::string, Mat> layers_weights;
 196
 197   for (int i = 0; i < graph_proto.initializer_size(); i++)
 198   {
 199     tensor_proto = graph_proto.initializer(i);
 200     Mat mat = getMatFromTensor(tensor_proto);
 201     releaseONNXTensor(tensor_proto);
 202     layers_weights.insert(std::make_pair(tensor_proto.name(), mat));
 203   }
 204   return layers_weights;
 205 }
 206
 207 static DictValue parse(const ::google::protobuf::RepeatedField< ::google::protobuf::int64>& src) {
 208     std::vector<int32_t> dst(src.size());
 209     convertInt64ToInt32(src, dst, src.size());
 210     return DictValue::arrayInt(&dst[0], src.size());
 211 }
 212
 213 LayerParams ONNXImporter::getLayerParams(const opencv_onnx::NodeProto& node_proto)
 214 {
 215     LayerParams lp;
 216     for(int i = 0; i < node_proto.attribute_size(); i++)
 217     {
 218         opencv_onnx::AttributeProto attribute_proto = node_proto.attribute(i);
 219         std::string attribute_name = attribute_proto.name();
 220
 221         if(attribute_name == "kernel_shape")
 222         {
 223             CV_Assert(attribute_proto.ints_size() == 2 || attribute_proto.ints_size() == 3);
 224             lp.set("kernel_size", parse(attribute_proto.ints()));
 225         }
 226         else if(attribute_name == "strides")
 227         {
 228             CV_Assert(attribute_proto.ints_size() == 2 || attribute_proto.ints_size() == 3);
 229             lp.set("stride", parse(attribute_proto.ints()));
 230         }
 231         else if(attribute_name == "pads")
 232         {
 233             if (node_proto.op_type() == "Pad")
 234             {
 235                 // Padding layer.
 236                 // Paddings are in order begin0, begin1, .. beginN, end0, end1, ..., endN.
 237                 // We need to shuffle it to begin0, end0, begin1, end1, ...
 238                 CV_Assert(attribute_proto.ints_size() % 2 == 0);
 239                 const int dims = attribute_proto.ints_size() / 2;
 240                 std::vector<int32_t> paddings;
 241                 paddings.reserve(attribute_proto.ints_size());
 242                 for (int i = 0; i < dims; ++i)
 243                 {
 244                     paddings.push_back(attribute_proto.ints(i));
 245                     paddings.push_back(attribute_proto.ints(dims + i));
 246                 }
 247                 lp.set("paddings", DictValue::arrayInt(&paddings[0], paddings.size()));
 248             }
 249             else
 250             {
 251                 // Convolution or pooling.
 252                 CV_Assert(attribute_proto.ints_size() == 4 || attribute_proto.ints_size() == 6);
 253                 lp.set("pad", parse(attribute_proto.ints()));
 254             }
 255         }
 256         else if(attribute_name == "auto_pad")
 257         {
 258             if (attribute_proto.s() == "SAME_UPPER" || attribute_proto.s() == "SAME_LOWER") {
 259                 lp.set("pad_mode",  "SAME");
 260             }
 261             else if (attribute_proto.s() == "VALID") {
 262                 lp.set("pad_mode", "VALID");
 263             }
 264         }
 265         else if(attribute_name == "dilations")
 266         {
 267             CV_Assert(attribute_proto.ints_size() == 2 || attribute_proto.ints_size() == 3);
 268             lp.set("dilation", parse(attribute_proto.ints()));
 269         }
 270         else if (attribute_proto.has_i())
 271         {
 272             ::google::protobuf::int64 src = attribute_proto.i();
 273             if (src < std::numeric_limits<int32_t>::min() || src > std::numeric_limits<int32_t>::max())
 274                 CV_Error(Error::StsOutOfRange, "Input is out of OpenCV 32S range");
 275             else
 276                 lp.set(attribute_name, saturate_cast<int32_t>(src));
 277         }
 278         else if (attribute_proto.has_f())
 279         {
 280             lp.set(attribute_name, attribute_proto.f());
 281         }
 282         else if (attribute_proto.has_s())
 283         {
 284             lp.set(attribute_name, attribute_proto.s());
 285         }
 286         else if (attribute_proto.floats_size() > 0)
 287         {
 288             lp.set(attribute_name, DictValue::arrayReal(
 289                 attribute_proto.floats().data(), attribute_proto.floats_size()));
 290         }
 291         else if (attribute_proto.ints_size() > 0)
 292         {
 293             lp.set(attribute_proto.name(), parse(attribute_proto.ints()));
 294         }
 295         else if (attribute_proto.has_t())
 296         {
 297             opencv_onnx::TensorProto tensor = attribute_proto.t();
 298             Mat blob = getMatFromTensor(tensor);
 299             lp.blobs.push_back(blob);
 300         }
 301         else if (attribute_proto.has_g() || attribute_proto.strings_size() > 0 ||
 302                     attribute_proto.tensors_size() > 0 || attribute_proto.graphs_size() > 0)
 303         {
 304                 CV_Error(Error::StsNotImplemented, "Unexpected attribute type");
 305         }
 306         else
 307             CV_Error(Error::StsNotImplemented, "Unsupported attribute type");
 308     }
 309     return lp;
 310 }
 311
 312 Mat ONNXImporter::getBlob(const opencv_onnx::NodeProto& node_proto,
 313                     const std::map<std::string, Mat>& constBlobs, int index)
 314 {
 315     CV_Assert(index < node_proto.input_size());
 316     std::map<std::string, Mat>::const_iterator constBlob;
 317     constBlob = constBlobs.find(node_proto.input(index));
 318     if (constBlob == constBlobs.end()) {
 319         CV_Error(Error::StsObjectNotFound,
 320              "Blob " + node_proto.input(index) + " not found in const blobs");
 321     }
 322     return constBlob->second;
 323 }
 324
 325 void ONNXImporter::populateNet(Net dstNet)
 326 {
 327     CV_Assert(model_proto.has_graph());
 328     opencv_onnx::GraphProto graph_proto = model_proto.graph();
 329     std::map<std::string, Mat> constBlobs = getGraphTensors(graph_proto);
 330     // List of internal blobs shapes.
 331     std::map<std::string, MatShape> outShapes;
 332     // Add all the inputs shapes. It includes as constant blobs as network's inputs shapes.
 333     for (int i = 0; i < graph_proto.input_size(); ++i)
 334     {
 335         opencv_onnx::ValueInfoProto valueInfoProto = graph_proto.input(i);
 336         CV_Assert(valueInfoProto.has_type());
 337         opencv_onnx::TypeProto typeProto = valueInfoProto.type();
 338         CV_Assert(typeProto.has_tensor_type());
 339         opencv_onnx::TypeProto::Tensor tensor = typeProto.tensor_type();
 340         CV_Assert(tensor.has_shape());
 341         opencv_onnx::TensorShapeProto tensorShape = tensor.shape();
 342
 343         MatShape inpShape(tensorShape.dim_size());
 344         for (int j = 0; j < inpShape.size(); ++j)
 345         {
 346             inpShape[j] = tensorShape.dim(j).dim_value();
 347         }
 348         outShapes[valueInfoProto.name()] = inpShape;
 349     }
 350
 351     std::string framework_name;
 352     if (model_proto.has_producer_name()) {
 353         framework_name = model_proto.producer_name();
 354     }
 355
 356     // create map with network inputs (without const blobs)
 357     std::map<std::string, LayerInfo> layer_id;
 358     std::map<std::string, LayerInfo>::iterator layerId;
 359     std::map<std::string, MatShape>::iterator shapeIt;
 360     // fill map: push layer name, layer id and output id
 361     std::vector<String> netInputs;
 362     for (int j = 0; j < graph_proto.input_size(); j++)
 363     {
 364         const std::string& name = graph_proto.input(j).name();
 365         if (constBlobs.find(name) == constBlobs.end()) {
 366             netInputs.push_back(name);
 367             layer_id.insert(std::make_pair(name, LayerInfo(0, netInputs.size() - 1)));
 368         }
 369     }
 370     dstNet.setInputsNames(netInputs);
 371
 372     int layersSize = graph_proto.node_size();
 373     LayerParams layerParams;
 374     opencv_onnx::NodeProto node_proto;
 375
 376     for(int li = 0; li < layersSize; li++)
 377     {
 378         node_proto = graph_proto.node(li);
 379         layerParams = getLayerParams(node_proto);
 380         CV_Assert(node_proto.output_size() >= 1);
 381         layerParams.name = node_proto.output(0);
 382
 383         std::string layer_type = node_proto.op_type();
 384         layerParams.type = layer_type;
 385
 386
 387         if (layer_type == "MaxPool")
 388         {
 389             layerParams.type = "Pooling";
 390             layerParams.set("pool", "MAX");
 391             layerParams.set("ceil_mode", layerParams.has("pad_mode"));
 392         }
 393         else if (layer_type == "AveragePool")
 394         {
 395             layerParams.type = "Pooling";
 396             layerParams.set("pool", "AVE");
 397             layerParams.set("ceil_mode", layerParams.has("pad_mode"));
 398             layerParams.set("ave_pool_padded_area", framework_name == "pytorch");
 399         }
 400         else if (layer_type == "GlobalAveragePool" || layer_type == "GlobalMaxPool")
 401         {
 402             layerParams.type = "Pooling";
 403             layerParams.set("pool", layer_type == "GlobalAveragePool" ? "AVE" : "MAX");
 404             layerParams.set("global_pooling", true);
 405         }
 406         else if (layer_type == "Slice")
 407         {
 408             if (layerParams.has("steps")) {
 409                 DictValue steps = layerParams.get("steps");
 410                 for (int i = 0; i < steps.size(); ++i) {
 411                     if (steps.get<int>(i) != 1)
 412                         CV_Error(Error::StsNotImplemented,
 413                                  "Slice layer only supports steps = 1");
 414                 }
 415             }
 416
 417             int axis = 0;
 418             if (layerParams.has("axes")) {
 419                 DictValue axes = layerParams.get("axes");
 420                 for (int i = 1; i < axes.size(); ++i) {
 421                     CV_Assert(axes.get<int>(i - 1) == axes.get<int>(i) - 1);
 422                 }
 423                 axis = axes.get<int>(0);
 424             }
 425             layerParams.set("axis", axis);
 426
 427             DictValue starts = layerParams.get("starts");
 428             DictValue ends = layerParams.get("ends");
 429             CV_Assert(starts.size() == ends.size());
 430
 431             std::vector<int> begin;
 432             std::vector<int> end;
 433             if (axis > 0) {
 434                 begin.resize(axis, 0);
 435                 end.resize(axis, -1);
 436             }
 437
 438             for (int i = 0; i < starts.size(); ++i)
 439             {
 440                 begin.push_back(starts.get<int>(i));
 441                 int finish = ends.get<int>(i);
 442                 end.push_back((finish < 0) ? --finish : finish); // numpy doesn't include last dim
 443             }
 444             layerParams.set("begin", DictValue::arrayInt(&begin[0], begin.size()));
 445             layerParams.set("end", DictValue::arrayInt(&end[0], end.size()));
 446         }
 447         else if (layer_type == "Add" || layer_type == "Sum")
 448         {
 449             if (layer_id.find(node_proto.input(1)) == layer_id.end())
 450             {
 451                 Mat blob = getBlob(node_proto, constBlobs, 1);
 452                 blob = blob.reshape(1, 1);
 453                 if (blob.total() == 1) {
 454                     layerParams.type = "Power";
 455                     layerParams.set("shift", blob.at<float>(0));
 456                 }
 457                 else {
 458                     layerParams.type = "Scale";
 459                     layerParams.set("bias_term", true);
 460                     layerParams.blobs.push_back(blob);
 461                 }
 462             }
 463             else {
 464                 layerParams.type = "Eltwise";
 465             }
 466         }
 467         else if (layer_type == "Sub")
 468         {
 469             Mat blob = getBlob(node_proto, constBlobs, 1);
 470             if (blob.total() == 1) {
 471                 layerParams.type = "Power";
 472                 layerParams.set("shift", -blob.at<float>(0));
 473             }
 474             else {
 475                 layerParams.type = "Scale";
 476                 layerParams.set("has_bias", true);
 477                 layerParams.blobs.push_back(-1.0f * blob.reshape(1, 1));
 478             }
 479         }
 480         else if (layer_type == "Div")
 481         {
 482             Mat blob = getBlob(node_proto, constBlobs, 1);
 483             CV_Assert_N(blob.type() == CV_32F, blob.total());
 484             if (blob.total() == 1)
 485             {
 486                 layerParams.set("scale", 1.0f / blob.at<float>(0));
 487                 layerParams.type = "Power";
 488             }
 489             else
 490             {
 491                 layerParams.type = "Scale";
 492                 divide(1.0, blob, blob);
 493                 layerParams.blobs.push_back(blob);
 494                 layerParams.set("bias_term", false);
 495             }
 496         }
 497         else if (layer_type == "Neg")
 498         {
 499             layerParams.type = "Power";
 500             layerParams.set("scale", -1);
 501         }
 502         else if (layer_type == "Constant")
 503         {
 504             CV_Assert(node_proto.input_size() == 0);
 505             CV_Assert(layerParams.blobs.size() == 1);
 506             constBlobs.insert(std::make_pair(layerParams.name, layerParams.blobs[0]));
 507             continue;
 508         }
 509         else if (layer_type == "ImageScaler")
 510         {
 511             const float scale = layerParams.has("scale") ? layerParams.get<float>("scale") : 1.0f;
 512             layerParams.erase("scale");
 513
 514             if (layerParams.has("bias"))
 515             {
 516                 layerParams.type = "Scale";
 517                 layerParams.blobs.push_back(
 518                     Mat(Size(1,  layerParams.get("bias").size()), CV_32FC1, scale));
 519
 520                 layerParams.set("bias_term", true);
 521                 Mat bias(1, layerParams.get("bias").size(), CV_32FC1);
 522                 for (int j = 0; j < bias.total(); j++) {
 523                     bias.at<float>(0, j) = layerParams.get("bias").getRealValue(j);
 524                 }
 525                 layerParams.blobs.push_back(bias);
 526                 layerParams.erase("bias");
 527             }
 528             else {
 529                 layerParams.set("scale", scale);
 530                 layerParams.type = "Power";
 531             }
 532         }
 533         else if (layer_type == "Clip")
 534         {
 535             layerParams.type = "ReLU6";
 536             replaceLayerParam(layerParams, "min", "min_value");
 537             replaceLayerParam(layerParams, "max", "max_value");
 538
 539         }
 540         else if (layer_type == "LeakyRelu")
 541         {
 542             layerParams.type = "ReLU";
 543             replaceLayerParam(layerParams, "alpha", "negative_slope");
 544         }
 545         else if (layer_type == "LRN")
 546         {
 547             replaceLayerParam(layerParams, "size", "local_size");
 548         }
 549         else if (layer_type == "InstanceNormalization")
 550         {
 551             if (node_proto.input_size() != 3)
 552                 CV_Error(Error::StsNotImplemented,
 553                          "Expected input, scale, bias");
 554
 555             layerParams.blobs.resize(4);
 556             layerParams.blobs[2] = getBlob(node_proto, constBlobs, 1);  // weightData
 557             layerParams.blobs[3] = getBlob(node_proto, constBlobs, 2);  // biasData
 558             layerParams.set("has_bias", true);
 559             layerParams.set("has_weight", true);
 560
 561             // Get number of channels in input
 562             int size = layerParams.blobs[2].total();
 563             layerParams.blobs[0] = Mat::zeros(size, 1, CV_32F); // mean
 564             layerParams.blobs[1] = Mat::ones(size, 1, CV_32F); // std
 565
 566             LayerParams mvnParams;
 567             mvnParams.name = layerParams.name + "/MVN";
 568             mvnParams.type = "MVN";
 569             mvnParams.set("eps", layerParams.get<float>("epsilon"));
 570             layerParams.erase("epsilon");
 571
 572             //Create MVN layer
 573             int id = dstNet.addLayer(mvnParams.name, mvnParams.type, mvnParams);
 574             //Connect to input
 575             layerId = layer_id.find(node_proto.input(0));
 576             CV_Assert(layerId != layer_id.end());
 577             dstNet.connect(layerId->second.layerId, layerId->second.outputId, id, 0);
 578             //Add shape
 579             layer_id.insert(std::make_pair(mvnParams.name, LayerInfo(id, 0)));
 580             outShapes[mvnParams.name] = outShapes[node_proto.input(0)];
 581
 582             //Replace Batch Norm's input to MVN
 583             node_proto.set_input(0, mvnParams.name);
 584             layerParams.type = "BatchNorm";
 585         }
 586         else if (layer_type == "BatchNormalization")
 587         {
 588             if (node_proto.input_size() != 5)
 589                 CV_Error(Error::StsNotImplemented,
 590                          "Expected input, scale, bias, mean and var");
 591
 592             layerParams.type = "BatchNorm";
 593             replaceLayerParam(layerParams, "epsilon", "eps");
 594             replaceLayerParam(layerParams, "spatial", "use_global_stats");
 595
 596             Mat meanData = getBlob(node_proto, constBlobs, 3);
 597             Mat stdData =  getBlob(node_proto, constBlobs, 4);
 598
 599             layerParams.blobs.push_back(meanData);
 600             layerParams.blobs.push_back(stdData);
 601
 602             if (!node_proto.input(1).empty()) {
 603                 layerParams.set("has_weight", true);
 604                 layerParams.blobs.push_back(getBlob(node_proto, constBlobs, 1));  // weightData
 605             } else {
 606                 layerParams.set("has_weight", false);
 607             }
 608
 609             if (!node_proto.input(2).empty()) {
 610                 layerParams.set("has_bias", true);
 611                 layerParams.blobs.push_back(getBlob(node_proto, constBlobs, 2)); // biasData
 612             } else {
 613                 layerParams.set("has_bias", false);
 614             }
 615         }
 616         else if (layer_type == "Gemm")
 617         {
 618             CV_Assert(node_proto.input_size() >= 2);
 619             layerParams.type = "InnerProduct";
 620             Mat weights = getBlob(node_proto, constBlobs, 1);
 621             int ind_num_out = 0;
 622             if (layerParams.has("transB") && !layerParams.get<int>("transB")) {
 623                 transpose(weights, weights);
 624                 ind_num_out = 1;
 625             }
 626             layerParams.blobs.push_back(weights);
 627
 628             if (node_proto.input_size() == 3) {
 629                 Mat bias = getBlob(node_proto, constBlobs, 2);
 630                 layerParams.blobs.push_back(bias);
 631             }
 632
 633             layerParams.set("num_output", layerParams.blobs[0].size[ind_num_out]);
 634             layerParams.set("bias_term", node_proto.input_size() == 3);
 635         }
 636         else if (layer_type == "MatMul")
 637         {
 638             CV_Assert(node_proto.input_size() == 2);
 639             layerParams.type = "InnerProduct";
 640             Mat blob = getBlob(node_proto, constBlobs, 1);
 641             layerParams.blobs.push_back(blob.t());
 642             layerParams.set("bias_term", false);
 643             layerParams.set("num_output", layerParams.blobs[0].size[0]);
 644         }
 645         else if (layer_type == "Mul")
 646         {
 647             CV_Assert(node_proto.input_size() == 2);
 648             if (layer_id.find(node_proto.input(1)) == layer_id.end()) {
 649                 Mat blob = getBlob(node_proto, constBlobs, 1);
 650                 blob = blob.reshape(1, 1);
 651                 if (blob.total() == 1) {
 652                     layerParams.set("scale", blob.at<float>(0));
 653                     layerParams.type = "Power";
 654                 }
 655                 else {
 656                     layerParams.blobs.push_back(blob);
 657                     layerParams.type = "Scale";
 658                 }
 659             }
 660             else {
 661                 layerParams.type = "Eltwise";
 662                 layerParams.set("operation", "prod");
 663             }
 664         }
 665         else if (layer_type == "Conv")
 666         {
 667             CV_Assert(node_proto.input_size() >= 2);
 668             layerParams.type = "Convolution";
 669             for (int j = 1; j < node_proto.input_size(); j++) {
 670                 layerParams.blobs.push_back(getBlob(node_proto, constBlobs, j));
 671             }
 672             layerParams.set("num_output", layerParams.blobs[0].size[0]);
 673             layerParams.set("bias_term", node_proto.input_size() == 3);
 674         }
 675         else if (layer_type == "ConvTranspose")
 676         {
 677             CV_Assert(node_proto.input_size() >= 2);
 678             layerParams.type = "Deconvolution";
 679             for (int j = 1; j < node_proto.input_size(); j++) {
 680                 layerParams.blobs.push_back(getBlob(node_proto, constBlobs, j));
 681             }
 682             layerParams.set("num_output", layerParams.blobs[0].size[1] * layerParams.get<int>("group", 1));
 683             layerParams.set("bias_term", node_proto.input_size() == 3);
 684
 685             if (!layerParams.has("kernel_size"))
 686                 CV_Error(Error::StsNotImplemented,
 687                          "Required attribute 'kernel_size' is not present.");
 688
 689             if (layerParams.has("output_shape"))
 690             {
 691                 const DictValue& outShape = layerParams.get("output_shape");
 692                 DictValue strides = layerParams.get("stride");
 693                 DictValue kernel = layerParams.get("kernel_size");
 694
 695                 String padMode;
 696                 std::vector<int> adjust_pads;
 697                 if (layerParams.has("pad_mode"))
 698                 {
 699                     padMode = toUpperCase(layerParams.get<String>("pad_mode"));
 700                     if (padMode != "SAME" && padMode != "VALID")
 701                         CV_Error(Error::StsError, "Unsupported padding mode " + padMode);
 702
 703                     for (int i = 0; i < strides.size(); i++)
 704                     {
 705                         int sz = outShape.get<int>(2 + i);
 706                         int stride = strides.get<int>(i);
 707                         adjust_pads.push_back(padMode == "SAME"? (sz - 1) % stride :
 708                                                                  (sz - kernel.get<int>(i)) % stride);
 709                     }
 710                     layerParams.set("adj", DictValue::arrayInt(&adjust_pads[0], adjust_pads.size()));
 711                 }
 712             }
 713             else if (layerParams.has("output_padding"))
 714             {
 715                 replaceLayerParam(layerParams, "output_padding", "adj");
 716             }
 717         }
 718         else if (layer_type == "Transpose")
 719         {
 720             layerParams.type = "Permute";
 721             replaceLayerParam(layerParams, "perm", "order");
 722         }
 723         else if (layer_type == "Unsqueeze")
 724         {
 725             CV_Assert(node_proto.input_size() == 1);
 726             DictValue axes = layerParams.get("axes");
 727             if (constBlobs.find(node_proto.input(0)) != constBlobs.end())
 728             {
 729                 // Constant input.
 730                 Mat input = getBlob(node_proto, constBlobs, 0);
 731
 732                 std::vector<int> dims;
 733                 for (int j = 0; j < input.dims; j++) {
 734                     dims.push_back(input.size[j]);
 735                 }
 736                 CV_Assert(axes.getIntValue(axes.size()-1) <= dims.size());
 737                 for (int j = 0; j < axes.size(); j++) {
 738                     dims.insert(dims.begin() + axes.getIntValue(j), 1);
 739                 }
 740
 741                 Mat out = input.reshape(0, dims);
 742                 constBlobs.insert(std::make_pair(layerParams.name, out));
 743                 continue;
 744             }
 745
 746             // Variable input.
 747             if (axes.size() != 1)
 748                 CV_Error(Error::StsNotImplemented, "Multidimensional unsqueeze");
 749
 750             int dims[] = {1, -1};
 751             layerParams.type = "Reshape";
 752             layerParams.set("axis", axes.getIntValue(0));
 753             layerParams.set("num_axes", 1);
 754             layerParams.set("dim", DictValue::arrayInt(&dims[0], 2));
 755         }
 756         else if (layer_type == "Reshape")
 757         {
 758             CV_Assert(node_proto.input_size() == 2 || layerParams.has("shape"));
 759
 760             if (node_proto.input_size() == 2) {
 761                 Mat blob = getBlob(node_proto, constBlobs, 1);
 762                 CV_Assert(blob.type() == CV_32SC1);
 763
 764                 layerParams.set("dim", DictValue::arrayInt<int*>(
 765                             blob.ptr<int>(), blob.total() ));
 766
 767                 if (layer_id.find(node_proto.input(0)) == layer_id.end()) {
 768                     std::vector<Mat> inputs(1, getBlob(node_proto, constBlobs, 0)), outputs;
 769                     runLayer(layerParams, inputs, outputs);
 770                     constBlobs.insert(std::make_pair(layerParams.name, outputs[0]));
 771                     continue;
 772                 }
 773             }
 774             else {
 775                 DictValue shape = layerParams.get("shape");
 776                 std::vector<int> dim;
 777                 for (int j = 0; j < shape.size(); j++) {
 778                     dim.push_back(shape.getIntValue(j));
 779                 }
 780
 781                 if (layer_id.find(node_proto.input(0)) == layer_id.end()) {
 782                     Mat input = getBlob(node_proto, constBlobs, 0);
 783                     Mat out = input.reshape(0, dim);
 784                     constBlobs.insert(std::make_pair(layerParams.name, out));
 785                     continue;
 786                 }
 787                 replaceLayerParam(layerParams, "shape", "dim");
 788             }
 789         }
 790         else if (layer_type == "Pad")
 791         {
 792             layerParams.type = "Padding";
 793         }
 794         else if (layer_type == "Shape")
 795         {
 796             CV_Assert(node_proto.input_size() == 1);
 797             shapeIt = outShapes.find(node_proto.input(0));
 798             CV_Assert(shapeIt != outShapes.end());
 799             MatShape inpShape = shapeIt->second;
 800
 801             Mat shapeMat(inpShape.size(), 1, CV_32S);
 802             for (int j = 0; j < inpShape.size(); ++j)
 803                 shapeMat.at<int>(j) = inpShape[j];
 804             shapeMat.dims = 1;
 805
 806             constBlobs.insert(std::make_pair(layerParams.name, shapeMat));
 807             continue;
 808         }
 809         else if (layer_type == "Gather")
 810         {
 811             CV_Assert(node_proto.input_size() == 2);
 812             CV_Assert(layerParams.has("axis"));
 813             Mat input = getBlob(node_proto, constBlobs, 0);
 814             Mat indexMat = getBlob(node_proto, constBlobs, 1);
 815             CV_Assert_N(indexMat.type() == CV_32S, indexMat.total() == 1);
 816             int index = indexMat.at<int>(0);
 817             int axis = layerParams.get<int>("axis");
 818
 819             std::vector<cv::Range> ranges(input.dims, Range::all());
 820             ranges[axis] = Range(index, index + 1);
 821
 822             Mat out = input(ranges);
 823             constBlobs.insert(std::make_pair(layerParams.name, out));
 824             continue;
 825         }
 826         else if (layer_type == "Concat")
 827         {
 828             bool hasVariableInps = false;
 829             for (int i = 0; i < node_proto.input_size(); ++i)
 830             {
 831                 if (layer_id.find(node_proto.input(i)) != layer_id.end())
 832                 {
 833                     hasVariableInps = true;
 834                     break;
 835                 }
 836             }
 837
 838             if (!hasVariableInps)
 839             {
 840                 std::vector<Mat> inputs(node_proto.input_size()), concatenated;
 841                 for (size_t i = 0; i < inputs.size(); ++i)
 842                 {
 843                     inputs[i] = getBlob(node_proto, constBlobs, i);
 844                 }
 845                 runLayer(layerParams, inputs, concatenated);
 846
 847                 CV_Assert(concatenated.size() == 1);
 848                 constBlobs.insert(std::make_pair(layerParams.name, concatenated[0]));
 849                 continue;
 850             }
 851         }
 852         else if (layer_type == "Upsample")
 853         {
 854             layerParams.type = "Resize";
 855             if (layerParams.has("scales"))
 856             {
 857                 // Pytorch layer
 858                 DictValue scales = layerParams.get("scales");
 859                 CV_Assert(scales.size() == 4);
 860                 layerParams.set("zoom_factor_y", scales.getIntValue(2));
 861                 layerParams.set("zoom_factor_x", scales.getIntValue(3));
 862             }
 863             else
 864             {
 865                 // Caffe2 layer
 866                 replaceLayerParam(layerParams, "height_scale", "zoom_factor_y");
 867                 replaceLayerParam(layerParams, "width_scale", "zoom_factor_x");
 868             }
 869             replaceLayerParam(layerParams, "mode", "interpolation");
 870         }
 871         else if (layer_type == "LogSoftmax")
 872         {
 873             layerParams.type = "Softmax";
 874             layerParams.set("log_softmax", true);
 875         }
 876         else
 877         {
 878             for (int j = 0; j < node_proto.input_size(); j++) {
 879                 if (layer_id.find(node_proto.input(j)) == layer_id.end())
 880                     layerParams.blobs.push_back(getBlob(node_proto, constBlobs, j));
 881             }
 882         }
 883
 884         int id = dstNet.addLayer(layerParams.name, layerParams.type, layerParams);
 885         layer_id.insert(std::make_pair(layerParams.name, LayerInfo(id, 0)));
 886
 887
 888         std::vector<MatShape> layerInpShapes, layerOutShapes, layerInternalShapes;
 889         for (int j = 0; j < node_proto.input_size(); j++) {
 890             layerId = layer_id.find(node_proto.input(j));
 891             if (layerId != layer_id.end()) {
 892                 dstNet.connect(layerId->second.layerId, layerId->second.outputId, id, j);
 893                 // Collect input shapes.
 894                 shapeIt = outShapes.find(node_proto.input(j));
 895                 CV_Assert(shapeIt != outShapes.end());
 896                 layerInpShapes.push_back(shapeIt->second);
 897             }
 898         }
 899
 900         // Compute shape of output blob for this layer.
 901         Ptr<Layer> layer = dstNet.getLayer(id);
 902         layer->getMemoryShapes(layerInpShapes, 0, layerOutShapes, layerInternalShapes);
 903         CV_Assert(!layerOutShapes.empty());
 904         outShapes[layerParams.name] = layerOutShapes[0];
 905     }
 906 }
 907
 908 Net readNetFromONNX(const String& onnxFile)
 909 {
 910     ONNXImporter onnxImporter(onnxFile.c_str());
 911     Net net;
 912     onnxImporter.populateNet(net);
 913     return net;
 914 }
 915
 916 Net readNetFromONNX(const char* buffer, size_t sizeBuffer)
 917 {
 918     ONNXImporter onnxImporter(buffer, sizeBuffer);
 919     Net net;
 920     onnxImporter.populateNet(net);
 921     return net;
 922 }
 923
 924 Net readNetFromONNX(const std::vector<uchar>& buffer)
 925 {
 926     return readNetFromONNX(reinterpret_cast<const char*>(buffer.data()), buffer.size());
 927 }
 928
 929 Mat readTensorFromONNX(const String& path)
 930 {
 931     opencv_onnx::TensorProto tensor_proto = opencv_onnx::TensorProto();
 932     std::fstream input(path.c_str(), std::ios::in | std::ios::binary);
 933     if (!tensor_proto.ParseFromIstream(&input)) {
 934         CV_Error(Error::StsUnsupportedFormat, "Failed to parse data");
 935     }
 936     Mat mat = getMatFromTensor(tensor_proto);
 937     releaseONNXTensor(tensor_proto);
 938     return mat;
 939 }
 940
 941 CV__DNN_EXPERIMENTAL_NS_END
 942 }} // namespace
 943
 944 #endif