[Model] Refactoring code of YOLOv5Cls with new model type (#1237)

* Refactoring code of YOLOv5Cls with new model type

* fix reviewed problem

* Normalize&HWC2CHW -> NormalizeAndPermute

* remove cast()

examples/vision/classification/yolov5cls/cpp/infer.cc

@@ -27,10 +27,9 @@ void CpuInfer(const std::string& model_file, const std::string& image_file) {
   }
 
   auto im = cv::imread(image_file);
-  auto im_bak = im.clone();
 
   fastdeploy::vision::ClassifyResult res;
-  if (!model.Predict(&im, &res)) {
+  if (!model.Predict(im, &res)) {
     std::cerr << "Failed to predict." << std::endl;
     return;
   }
@@ -48,10 +47,9 @@ void GpuInfer(const std::string& model_file, const std::string& image_file) {
   }
 
   auto im = cv::imread(image_file);
-  auto im_bak = im.clone();
 
   fastdeploy::vision::ClassifyResult res;
-  if (!model.Predict(&im, &res)) {
+  if (!model.Predict(im, &res)) {
     std::cerr << "Failed to predict." << std::endl;
     return;
   }
@@ -71,10 +69,9 @@ void TrtInfer(const std::string& model_file, const std::string& image_file) {
   }
 
   auto im = cv::imread(image_file);
-  auto im_bak = im.clone();
 
   fastdeploy::vision::ClassifyResult res;
-  if (!model.Predict(&im, &res)) {
+  if (!model.Predict(im, &res)) {
     std::cerr << "Failed to predict." << std::endl;
     return;
   }

examples/vision/classification/yolov5cls/python/infer.py

@@ -44,8 +44,9 @@ args = parse_arguments()
 runtime_option = build_option(args)
 model = fd.vision.classification.YOLOv5Cls(
     args.model, runtime_option=runtime_option)
+model.postprocessor.topk = args.topk
 
 # 预测图片分类结果
 im = cv2.imread(args.image)
-result = model.predict(im, args.topk)
+result = model.predict(im)
 print(result)

fastdeploy/vision.h

@@ -16,7 +16,7 @@
 #include "fastdeploy/core/config.h"
 #ifdef ENABLE_VISION
 #include "fastdeploy/vision/classification/contrib/resnet.h"
-#include "fastdeploy/vision/classification/contrib/yolov5cls.h"
+#include "fastdeploy/vision/classification/contrib/yolov5cls/yolov5cls.h"
 #include "fastdeploy/vision/classification/ppcls/model.h"
 #include "fastdeploy/vision/detection/contrib/nanodet_plus.h"
 #include "fastdeploy/vision/detection/contrib/scaledyolov4.h"

fastdeploy/vision/classification/contrib/yolov5cls.cc

@@ -1,116 +0,0 @@
-// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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 "fastdeploy/vision/classification/contrib/yolov5cls.h"
-
-#include "fastdeploy/utils/perf.h"
-#include "fastdeploy/vision/utils/utils.h"
-
-namespace fastdeploy {
-namespace vision {
-namespace classification {
-
-YOLOv5Cls::YOLOv5Cls(const std::string& model_file,
-                     const std::string& params_file,
-                     const RuntimeOption& custom_option,
-                     const ModelFormat& model_format) {
-  if (model_format == ModelFormat::ONNX) {
-    valid_cpu_backends = {Backend::OPENVINO, Backend::ORT};
-    valid_gpu_backends = {Backend::ORT, Backend::TRT};
-  } else {
-    valid_cpu_backends = {Backend::PDINFER, Backend::ORT};
-    valid_gpu_backends = {Backend::PDINFER, Backend::ORT, Backend::TRT};
-  }
-  runtime_option = custom_option;
-  runtime_option.model_format = model_format;
-  runtime_option.model_file = model_file;
-  runtime_option.params_file = params_file;
-  initialized = Initialize();
-}
-
-bool YOLOv5Cls::Initialize() {
-  // preprocess parameters
-  size = {224, 224};
-  if (!InitRuntime()) {
-    FDERROR << "Failed to initialize fastdeploy backend." << std::endl;
-    return false;
-  }
-  return true;
-}
-
-bool YOLOv5Cls::Preprocess(Mat* mat, FDTensor* output,
-                           const std::vector<int>& size) {
-  // CenterCrop
-  int crop_size = std::min(mat->Height(), mat->Width());
-  CenterCrop::Run(mat, crop_size, crop_size);
-  Resize::Run(mat, size[0], size[1], -1, -1, cv::INTER_LINEAR);
-  // Normalize
-  BGR2RGB::Run(mat);
-  std::vector<float> alpha = {1.0f / 255.0f, 1.0f / 255.0f, 1.0f / 255.0f};
-  std::vector<float> beta = {0.0f, 0.0f, 0.0f};
-  Convert::Run(mat, alpha, beta);
-  std::vector<float> mean = {0.485f, 0.456f, 0.406f};
-  std::vector<float> std = {0.229f, 0.224f, 0.225f};
-  Normalize::Run(mat, mean, std, false);
-  HWC2CHW::Run(mat);
-  Cast::Run(mat, "float");
-
-  mat->ShareWithTensor(output);
-  output->shape.insert(output->shape.begin(), 1);
-  return true;
-}
-
-bool YOLOv5Cls::Postprocess(const FDTensor& infer_result,
-                            ClassifyResult* result, int topk) {
-  // Softmax
-  FDTensor infer_result_softmax;
-  function::Softmax(infer_result, &infer_result_softmax, 1);
-  int num_classes = infer_result_softmax.shape[1];
-  const float* infer_result_buffer =
-      reinterpret_cast<const float*>(infer_result_softmax.Data());
-  topk = std::min(num_classes, topk);
-  result->label_ids =
-      utils::TopKIndices(infer_result_buffer, num_classes, topk);
-  result->scores.resize(topk);
-  for (int i = 0; i < topk; ++i) {
-    result->scores[i] = *(infer_result_buffer + result->label_ids[i]);
-  }
-  return true;
-}
-
-bool YOLOv5Cls::Predict(cv::Mat* im, ClassifyResult* result, int topk) {
-  Mat mat(*im);
-  std::vector<FDTensor> input_tensors(1);
-  if (!Preprocess(&mat, &input_tensors[0], size)) {
-    FDERROR << "Failed to preprocess input image." << std::endl;
-    return false;
-  }
-
-  input_tensors[0].name = InputInfoOfRuntime(0).name;
-  std::vector<FDTensor> output_tensors(1);
-  if (!Infer(input_tensors, &output_tensors)) {
-    FDERROR << "Failed to inference." << std::endl;
-    return false;
-  }
-
-  if (!Postprocess(output_tensors[0], result, topk)) {
-    FDERROR << "Failed to post process." << std::endl;
-    return false;
-  }
-  return true;
-}
-
-}  // namespace classification
-}  // namespace vision
-}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls.h

@@ -1,70 +0,0 @@
-// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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.
-
-#pragma once
-#include "fastdeploy/fastdeploy_model.h"
-#include "fastdeploy/vision/common/processors/transform.h"
-#include "fastdeploy/vision/common/result.h"
-
-namespace fastdeploy {
-namespace vision {
-/** \brief All image classification model APIs are defined inside this namespace
- *
- */
-namespace classification {
-
-/*! @brief YOLOv5Cls model object used when to load a YOLOv5Cls model exported by YOLOv5
- */
-class FASTDEPLOY_DECL YOLOv5Cls : public FastDeployModel {
- public:
-  /** \brief Set path of model file and configuration file, and the configuration of runtime
-   *
-   * \param[in] model_file Path of model file, e.g yolov5cls/yolov5n-cls.onnx
-   * \param[in] params_file Path of parameter file, if the model format is ONNX, this parameter will be ignored
-   * \param[in] custom_option RuntimeOption for inference, the default will use cpu, and choose the backend defined in `valid_cpu_backends`
-   * \param[in] model_format Model format of the loaded model, default is ONNX format
-   */
-  YOLOv5Cls(const std::string& model_file, const std::string& params_file = "",
-            const RuntimeOption& custom_option = RuntimeOption(),
-            const ModelFormat& model_format = ModelFormat::ONNX);
-
-  /// Get model's name
-  virtual std::string ModelName() const { return "yolov5cls"; }
-
-  /** \brief Predict the classification result for an input image
-   *
-   * \param[in] im The input image data, comes from cv::imread(), is a 3-D array with layout HWC, BGR format
-   * \param[in] result The output classification result will be writen to this structure
-   * \param[in] topk Returns the topk classification result with the highest predicted probability, the default is 1
-   * \return true if the prediction successed, otherwise false
-   */
-  virtual bool Predict(cv::Mat* im, ClassifyResult* result, int topk = 1);
-
-  /// Preprocess image size, the default is (224, 224)
-  std::vector<int> size;
-
- private:
-  bool Initialize();
-  /// Preprocess an input image, and set the preprocessed results to `outputs`
-  bool Preprocess(Mat* mat, FDTensor* output,
-                  const std::vector<int>& size = {224, 224});
-
-  /// Postprocess the inferenced results, and set the final result to `result`
-  bool Postprocess(const FDTensor& infer_result, ClassifyResult* result,
-                   int topk = 1);
-};
-
-}  // namespace classification
-}  // namespace vision
-}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/postprocessor.cc

@@ -0,0 +1,58 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "fastdeploy/vision/classification/contrib/yolov5cls/postprocessor.h"
+#include "fastdeploy/vision/utils/utils.h"
+
+namespace fastdeploy {
+namespace vision {
+namespace classification {
+
+YOLOv5ClsPostprocessor::YOLOv5ClsPostprocessor() {
+  topk_ = 1;
+}
+
+bool YOLOv5ClsPostprocessor::Run(
+    const std::vector<FDTensor> &tensors, std::vector<ClassifyResult> *results,
+    const std::vector<std::map<std::string, std::array<float, 2>>> &ims_info) {
+  int batch = tensors[0].shape[0];
+  FDTensor infer_result = tensors[0];
+  FDTensor infer_result_softmax;
+  function::Softmax(infer_result, &infer_result_softmax, 1);
+  results->resize(batch);
+
+  for (size_t bs = 0; bs < batch; ++bs) {
+    (*results)[bs].Clear();
+    // output (1,1000) score classnum 1000
+    int num_classes = infer_result_softmax.shape[1];
+    const float* infer_result_buffer =
+        reinterpret_cast<const float*>(infer_result_softmax.Data()) + bs * infer_result_softmax.shape[1];
+    topk_ = std::min(num_classes, topk_);
+    (*results)[bs].label_ids =
+        utils::TopKIndices(infer_result_buffer, num_classes, topk_);
+    (*results)[bs].scores.resize(topk_);
+    for (int i = 0; i < topk_; ++i) {
+      (*results)[bs].scores[i] = *(infer_result_buffer + (*results)[bs].label_ids[i]);
+    }
+
+    if ((*results)[bs].label_ids.size() == 0) {
+      return true;
+    }
+  }
+  return true;
+}
+
+} // namespace classification
+} // namespace vision
+} // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/postprocessor.h

@@ -0,0 +1,56 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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.
+
+#pragma once
+#include "fastdeploy/vision/common/processors/transform.h"
+#include "fastdeploy/vision/common/result.h"
+
+namespace fastdeploy {
+namespace vision {
+
+namespace classification {
+/*! @brief Postprocessor object for YOLOv5Cls serials model.
+ */
+class FASTDEPLOY_DECL YOLOv5ClsPostprocessor {
+ public:
+  /** \brief Create a postprocessor instance for YOLOv5Cls serials model
+   */
+  YOLOv5ClsPostprocessor();
+
+  /** \brief Process the result of runtime and fill to ClassifyResult structure
+   *
+   * \param[in] tensors The inference result from runtime
+   * \param[in] result The output result of classification
+   * \param[in] ims_info The shape info list, record input_shape and output_shape
+   * \return true if the postprocess successed, otherwise false
+   */
+  bool Run(const std::vector<FDTensor>& tensors,
+      std::vector<ClassifyResult>* results,
+      const std::vector<std::map<std::string, std::array<float, 2>>>& ims_info);
+
+  /// Set topk, default 1
+  void SetTopK(const int& topk) {
+    topk_ = topk;
+  }
+
+  /// Get topk, default 1
+  float GetTopK() const { return topk_; }
+
+ protected:
+  int topk_;
+};
+
+}  // namespace classification
+}  // namespace vision
+}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/preprocessor.cc

@@ -0,0 +1,88 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "fastdeploy/vision/classification/contrib/yolov5cls/preprocessor.h"
+#include "fastdeploy/function/concat.h"
+
+namespace fastdeploy {
+namespace vision {
+namespace classification {
+
+YOLOv5ClsPreprocessor::YOLOv5ClsPreprocessor() {
+  size_ = {224, 224}; //{h,w}
+}
+
+bool YOLOv5ClsPreprocessor::Preprocess(FDMat* mat, FDTensor* output,
+            std::map<std::string, std::array<float, 2>>* im_info) {
+  // Record the shape of image and the shape of preprocessed image
+  (*im_info)["input_shape"] = {static_cast<float>(mat->Height()),
+                               static_cast<float>(mat->Width())};
+
+  // process after image load
+  double ratio = (size_[0] * 1.0) / std::max(static_cast<float>(mat->Height()),
+                                            static_cast<float>(mat->Width()));
+
+  // yolov5cls's preprocess steps
+  // 1. CenterCrop
+  // 2. Normalize
+  // CenterCrop
+  int crop_size = std::min(mat->Height(), mat->Width());
+  CenterCrop::Run(mat, crop_size, crop_size);
+  Resize::Run(mat, size_[0], size_[1], -1, -1, cv::INTER_LINEAR);
+  // Normalize
+  BGR2RGB::Run(mat);
+  std::vector<float> alpha = {1.0f / 255.0f, 1.0f / 255.0f, 1.0f / 255.0f};
+  std::vector<float> beta = {0.0f, 0.0f, 0.0f};
+  Convert::Run(mat, alpha, beta);
+  std::vector<float> mean = {0.485f, 0.456f, 0.406f};
+  std::vector<float> std = {0.229f, 0.224f, 0.225f};
+  NormalizeAndPermute::Run(mat, mean, std, false);
+
+  // Record output shape of preprocessed image
+  (*im_info)["output_shape"] = {static_cast<float>(mat->Height()),
+                                static_cast<float>(mat->Width())};
+
+  mat->ShareWithTensor(output);
+  output->ExpandDim(0);  // reshape to n, h, w, c
+  return true;
+}
+
+bool YOLOv5ClsPreprocessor::Run(std::vector<FDMat>* images, std::vector<FDTensor>* outputs,
+                             std::vector<std::map<std::string, std::array<float, 2>>>* ims_info) {
+  if (images->size() == 0) {
+    FDERROR << "The size of input images should be greater than 0." << std::endl;
+    return false;
+  }
+  ims_info->resize(images->size());
+  outputs->resize(1);
+  // Concat all the preprocessed data to a batch tensor
+  std::vector<FDTensor> tensors(images->size()); 
+  for (size_t i = 0; i < images->size(); ++i) {
+    if (!Preprocess(&(*images)[i], &tensors[i], &(*ims_info)[i])) {
+      FDERROR << "Failed to preprocess input image." << std::endl;
+      return false;
+    }
+  }
+
+  if (tensors.size() == 1) {
+    (*outputs)[0] = std::move(tensors[0]);
+  } else {
+    function::Concat(tensors, &((*outputs)[0]), 0);
+  }
+  return true;
+}
+
+}  // namespace classification
+}  // namespace vision
+}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/preprocessor.h

@@ -0,0 +1,57 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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.
+
+#pragma once
+#include "fastdeploy/vision/common/processors/transform.h"
+#include "fastdeploy/vision/common/result.h"
+
+namespace fastdeploy {
+namespace vision {
+
+namespace classification {
+/*! @brief Preprocessor object for YOLOv5Cls serials model.
+ */
+class FASTDEPLOY_DECL YOLOv5ClsPreprocessor {
+ public:
+  /** \brief Create a preprocessor instance for YOLOv5Cls serials model
+   */
+  YOLOv5ClsPreprocessor();
+
+  /** \brief Process the input image and prepare input tensors for runtime
+   *
+   * \param[in] images The input image data list, all the elements are returned by cv::imread()
+   * \param[in] outputs The output tensors which will feed in runtime
+   * \param[in] ims_info The shape info list, record input_shape and output_shape
+   * \return true if the preprocess successed, otherwise false
+   */
+  bool Run(std::vector<FDMat>* images, std::vector<FDTensor>* outputs,
+           std::vector<std::map<std::string, std::array<float, 2>>>* ims_info);
+
+  /// Set target size, tuple of (width, height), default size = {224, 224}
+  void SetSize(const std::vector<int>& size) { size_ = size; }
+
+  /// Get target size, tuple of (width, height), default size = {224, 224}
+  std::vector<int> GetSize() const { return size_; }
+
+ protected:
+  bool Preprocess(FDMat* mat, FDTensor* output,
+                  std::map<std::string, std::array<float, 2>>* im_info);
+
+  // target size, tuple of (width, height), default size = {224, 224}
+  std::vector<int> size_;
+};
+
+}  // namespace classification
+}  // namespace vision
+}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/yolov5cls.cc

@@ -0,0 +1,80 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "fastdeploy/vision/classification/contrib/yolov5cls/yolov5cls.h"
+#include "fastdeploy/vision/utils/utils.h"
+
+namespace fastdeploy {
+namespace vision {
+namespace classification {
+
+YOLOv5Cls::YOLOv5Cls(const std::string& model_file, const std::string& params_file,
+               const RuntimeOption& custom_option,
+               const ModelFormat& model_format) {
+  if (model_format == ModelFormat::ONNX) {
+    valid_cpu_backends = {Backend::OPENVINO, Backend::ORT};
+    valid_gpu_backends = {Backend::ORT, Backend::TRT};
+  } else {
+    valid_cpu_backends = {Backend::PDINFER, Backend::ORT, Backend::LITE};
+    valid_gpu_backends = {Backend::PDINFER, Backend::ORT, Backend::TRT};
+  }
+  runtime_option = custom_option;
+  runtime_option.model_format = model_format;
+  runtime_option.model_file = model_file;
+  runtime_option.params_file = params_file;
+  initialized = Initialize();
+}
+
+bool YOLOv5Cls::Initialize() {
+  if (!InitRuntime()) {
+    FDERROR << "Failed to initialize fastdeploy backend." << std::endl;
+    return false;
+  }
+  return true;
+}
+
+bool YOLOv5Cls::Predict(const cv::Mat& im, ClassifyResult* result) {
+  std::vector<ClassifyResult> results;
+  if (!BatchPredict({im}, &results)) {
+    return false;
+  }
+  *result = std::move(results[0]);
+  return true;
+}
+
+bool YOLOv5Cls::BatchPredict(const std::vector<cv::Mat>& images, std::vector<ClassifyResult>* results) {
+  std::vector<std::map<std::string, std::array<float, 2>>> ims_info;
+  std::vector<FDMat> fd_images = WrapMat(images);
+
+  if (!preprocessor_.Run(&fd_images, &reused_input_tensors_, &ims_info)) {
+    FDERROR << "Failed to preprocess the input image." << std::endl;
+    return false;
+  }
+
+  reused_input_tensors_[0].name = InputInfoOfRuntime(0).name;
+  if (!Infer(reused_input_tensors_, &reused_output_tensors_)) {
+    FDERROR << "Failed to inference by runtime." << std::endl;
+    return false;
+  }
+
+  if (!postprocessor_.Run(reused_output_tensors_, results, ims_info)) {
+    FDERROR << "Failed to postprocess the inference results by runtime." << std::endl;
+    return false;
+  }
+  return true;
+}
+
+}  // namespace classification
+}  // namespace vision
+}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/yolov5cls.h

@@ -0,0 +1,76 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.  //NOLINT
+//
+// 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.
+
+#pragma once
+
+#include "fastdeploy/fastdeploy_model.h"
+#include "fastdeploy/vision/classification/contrib/yolov5cls/preprocessor.h"
+#include "fastdeploy/vision/classification/contrib/yolov5cls/postprocessor.h"
+
+namespace fastdeploy {
+namespace vision {
+namespace classification {
+/*! @brief YOLOv5Cls model object used when to load a YOLOv5Cls model exported by YOLOv5Cls.
+ */
+class FASTDEPLOY_DECL YOLOv5Cls : public FastDeployModel {
+ public:
+  /** \brief  Set path of model file and the configuration of runtime.
+   *
+   * \param[in] model_file Path of model file, e.g ./yolov5cls.onnx
+   * \param[in] params_file Path of parameter file, e.g ppyoloe/model.pdiparams, if the model format is ONNX, this parameter will be ignored
+   * \param[in] custom_option RuntimeOption for inference, the default will use cpu, and choose the backend defined in "valid_cpu_backends"
+   * \param[in] model_format Model format of the loaded model, default is ONNX format
+   */
+  YOLOv5Cls(const std::string& model_file, const std::string& params_file = "",
+         const RuntimeOption& custom_option = RuntimeOption(),
+         const ModelFormat& model_format = ModelFormat::ONNX);
+
+  std::string ModelName() const { return "yolov5cls"; }
+
+  /** \brief Predict the classification result for an input image
+   *
+   * \param[in] img The input image data, comes from cv::imread(), is a 3-D array with layout HWC, BGR format
+   * \param[in] result The output classification result will be writen to this structure
+   * \return true if the prediction successed, otherwise false
+   */
+  virtual bool Predict(const cv::Mat& img, ClassifyResult* result);
+
+  /** \brief Predict the classification results for a batch of input images
+   *
+   * \param[in] imgs, The input image list, each element comes from cv::imread()
+   * \param[in] results The output classification result list
+   * \return true if the prediction successed, otherwise false
+   */
+  virtual bool BatchPredict(const std::vector<cv::Mat>& imgs,
+                            std::vector<ClassifyResult>* results);
+
+  /// Get preprocessor reference of YOLOv5Cls
+  virtual YOLOv5ClsPreprocessor& GetPreprocessor() {
+    return preprocessor_;
+  }
+
+  /// Get postprocessor reference of YOLOv5Cls
+  virtual YOLOv5ClsPostprocessor& GetPostprocessor() {
+    return postprocessor_;
+  }
+
+ protected:
+  bool Initialize();
+  YOLOv5ClsPreprocessor preprocessor_;
+  YOLOv5ClsPostprocessor postprocessor_;
+};
+
+}  // namespace classification
+}  // namespace vision
+}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls/yolov5cls_pybind.cc

@@ -0,0 +1,84 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "fastdeploy/pybind/main.h"
+
+namespace fastdeploy {
+void BindYOLOv5Cls(pybind11::module& m) {
+  pybind11::class_<vision::classification::YOLOv5ClsPreprocessor>(
+      m, "YOLOv5ClsPreprocessor")
+      .def(pybind11::init<>())
+      .def("run", [](vision::classification::YOLOv5ClsPreprocessor& self, std::vector<pybind11::array>& im_list) {
+        std::vector<vision::FDMat> images;
+        for (size_t i = 0; i < im_list.size(); ++i) {
+          images.push_back(vision::WrapMat(PyArrayToCvMat(im_list[i])));
+        }
+        std::vector<FDTensor> outputs;
+        std::vector<std::map<std::string, std::array<float, 2>>> ims_info;
+        if (!self.Run(&images, &outputs, &ims_info)) {
+          throw std::runtime_error("raise Exception('Failed to preprocess the input data in YOLOv5ClsPreprocessor.')");
+        }
+        for (size_t i = 0; i < outputs.size(); ++i) {
+          outputs[i].StopSharing();
+        }
+        return make_pair(outputs, ims_info);
+      })
+      .def_property("size", &vision::classification::YOLOv5ClsPreprocessor::GetSize, &vision::classification::YOLOv5ClsPreprocessor::SetSize);
+
+  pybind11::class_<vision::classification::YOLOv5ClsPostprocessor>(
+      m, "YOLOv5ClsPostprocessor")
+      .def(pybind11::init<>())
+      .def("run", [](vision::classification::YOLOv5ClsPostprocessor& self, std::vector<FDTensor>& inputs,
+                     const std::vector<std::map<std::string, std::array<float, 2>>>& ims_info) {
+        std::vector<vision::ClassifyResult> results;
+        if (!self.Run(inputs, &results, ims_info)) {
+          throw std::runtime_error("raise Exception('Failed to postprocess the runtime result in YOLOv5ClsPostprocessor.')");
+        }
+        return results;
+      })
+      .def("run", [](vision::classification::YOLOv5ClsPostprocessor& self, std::vector<pybind11::array>& input_array,
+                     const std::vector<std::map<std::string, std::array<float, 2>>>& ims_info) {
+        std::vector<vision::ClassifyResult> results;
+        std::vector<FDTensor> inputs;
+        PyArrayToTensorList(input_array, &inputs, /*share_buffer=*/true);
+        if (!self.Run(inputs, &results, ims_info)) {
+          throw std::runtime_error("raise Exception('Failed to postprocess the runtime result in YOLOv5ClsPostprocessor.')");
+        }
+        return results;
+      })
+      .def_property("topk", &vision::classification::YOLOv5ClsPostprocessor::GetTopK, &vision::classification::YOLOv5ClsPostprocessor::SetTopK);
+
+  pybind11::class_<vision::classification::YOLOv5Cls, FastDeployModel>(m, "YOLOv5Cls")
+      .def(pybind11::init<std::string, std::string, RuntimeOption,
+                          ModelFormat>())
+      .def("predict",
+           [](vision::classification::YOLOv5Cls& self, pybind11::array& data) {
+             auto mat = PyArrayToCvMat(data);
+             vision::ClassifyResult res;
+             self.Predict(mat, &res);
+             return res;
+           })
+      .def("batch_predict", [](vision::classification::YOLOv5Cls& self, std::vector<pybind11::array>& data) {
+        std::vector<cv::Mat> images;
+        for (size_t i = 0; i < data.size(); ++i) {
+          images.push_back(PyArrayToCvMat(data[i]));
+        }
+        std::vector<vision::ClassifyResult> results;
+        self.BatchPredict(images, &results);
+        return results;
+      })
+      .def_property_readonly("preprocessor", &vision::classification::YOLOv5Cls::GetPreprocessor)
+      .def_property_readonly("postprocessor", &vision::classification::YOLOv5Cls::GetPostprocessor);
+}
+}  // namespace fastdeploy

fastdeploy/vision/classification/contrib/yolov5cls_pybind.cc

@@ -1,32 +0,0 @@
-// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
-//
-// 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 "fastdeploy/pybind/main.h"
-
-namespace fastdeploy {
-void BindYOLOv5Cls(pybind11::module& m) {
-  pybind11::class_<vision::classification::YOLOv5Cls, FastDeployModel>(
-      m, "YOLOv5Cls")
-      .def(pybind11::init<std::string, std::string, RuntimeOption,
-                          ModelFormat>())
-      .def("predict",
-           [](vision::classification::YOLOv5Cls& self, pybind11::array& data,
-              int topk = 1) {
-             auto mat = PyArrayToCvMat(data);
-             vision::ClassifyResult res;
-             self.Predict(&mat, &res, topk);
-             return res;
-           })
-      .def_readwrite("size", &vision::classification::YOLOv5Cls::size);
-}
-}  // namespace fastdeploy

python/fastdeploy/vision/classification/contrib/yolov5cls.py

@@ -18,18 +18,78 @@ from .... import FastDeployModel, ModelFormat
 from .... import c_lib_wrap as C
 
 
+class YOLOv5ClsPreprocessor:
+    def __init__(self):
+        """Create a preprocessor for YOLOv5Cls
+        """
+        self._preprocessor = C.vision.classification.YOLOv5ClsPreprocessor()
+
+    def run(self, input_ims):
+        """Preprocess input images for YOLOv5Cls
+
+        :param: input_ims: (list of numpy.ndarray)The input image
+        :return: list of FDTensor
+        """
+        return self._preprocessor.run(input_ims)
+
+    @property
+    def size(self):
+        """
+        Argument for image preprocessing step, the preprocess image size, tuple of (width, height), default size = [224, 224]
+        """
+        return self._preprocessor.size
+
+    @size.setter
+    def size(self, wh):
+        assert isinstance(wh, (list, tuple)),\
+            "The value to set `size` must be type of tuple or list."
+        assert len(wh) == 2,\
+            "The value to set `size` must contatins 2 elements means [width, height], but now it contains {} elements.".format(
+            len(wh))
+        self._preprocessor.size = wh
+
+
+class YOLOv5ClsPostprocessor:
+    def __init__(self):
+        """Create a postprocessor for YOLOv5Cls
+        """
+        self._postprocessor = C.vision.classification.YOLOv5ClsPostprocessor()
+
+    def run(self, runtime_results, ims_info):
+        """Postprocess the runtime results for YOLOv5Cls
+
+        :param: runtime_results: (list of FDTensor)The output FDTensor results from runtime
+        :param: ims_info: (list of dict)Record input_shape and output_shape
+        :return: list of ClassifyResult(If the runtime_results is predict by batched samples, the length of this list equals to the batch size)
+        """
+        return self._postprocessor.run(runtime_results, ims_info)
+
+    @property
+    def topk(self):
+        """
+        topk for postprocessing, default is 1
+        """
+        return self._postprocessor.topk
+
+    @topk.setter
+    def topk(self, topk):
+        assert isinstance(topk, int),\
+            "The value to set `top k` must be type of int."
+        self._postprocessor.topk = topk
+
+
 class YOLOv5Cls(FastDeployModel):
     def __init__(self,
                  model_file,
                  params_file="",
                  runtime_option=None,
                  model_format=ModelFormat.ONNX):
-        """Load a image classification model exported by YOLOv5.
+        """Load a YOLOv5Cls model exported by YOLOv5Cls.
 
-        :param model_file: (str)Path of model file, e.g yolov5cls/yolov5n-cls.onnx
-        :param params_file: (str)Path of parameters file, if the model_fomat is ModelFormat.ONNX, this param will be ignored, can be set as empty string
+        :param model_file: (str)Path of model file, e.g ./YOLOv5Cls.onnx
+        :param params_file: (str)Path of parameters file, e.g yolox/model.pdiparams, if the model_fomat is ModelFormat.ONNX, this param will be ignored, can be set as empty string
         :param runtime_option: (fastdeploy.RuntimeOption)RuntimeOption for inference this model, if it's None, will use the default backend on CPU
-        :param model_format: (fastdeploy.ModelForamt)Model format of the loaded model, default is ONNX
+        :param model_format: (fastdeploy.ModelForamt)Model format of the loaded model
         """
 
         super(YOLOv5Cls, self).__init__(runtime_option)
@@ -37,33 +97,39 @@ class YOLOv5Cls(FastDeployModel):
         assert model_format == ModelFormat.ONNX, "YOLOv5Cls only support model format of ModelFormat.ONNX now."
         self._model = C.vision.classification.YOLOv5Cls(
             model_file, params_file, self._runtime_option, model_format)
+
         assert self.initialized, "YOLOv5Cls initialize failed."
 
-    def predict(self, input_image, topk=1):
+    def predict(self, input_image):
         """Classify an input image
 
-        :param im: (numpy.ndarray)The input image data, 3-D array with layout HWC, BGR format
-        :param topk: (int)The topk result by the classify confidence score, default 1
+        :param input_image: (numpy.ndarray)The input image data, 3-D array with layout HWC, BGR format
         :return: ClassifyResult
         """
+        assert input_image is not None, "Input image is None."
+        return self._model.predict(input_image)
 
-        return self._model.predict(input_image, topk)
+    def batch_predict(self, images):
+        """Classify a batch of input image
+
+        :param im: (list of numpy.ndarray) The input image list, each element is a 3-D array with layout HWC, BGR format
+        :return list of ClassifyResult
+        """
+
+        return self._model.batch_predict(images)
 
     @property
-    def size(self):
-        """
-        Returns the preprocess image size, default is (224, 224)
-        """
-        return self._model.size
+    def preprocessor(self):
+        """Get YOLOv5ClsPreprocessor object of the loaded model
 
-    @size.setter
-    def size(self, wh):
+        :return YOLOv5ClsPreprocessor
         """
-        Set the preprocess image size
+        return self._model.preprocessor
+
+    @property
+    def postprocessor(self):
+        """Get YOLOv5ClsPostprocessor object of the loaded model
+
+        :return YOLOv5ClsPostprocessor
         """
-        assert isinstance(wh, (list, tuple)),\
-            "The value to set `size` must be type of tuple or list."
-        assert len(wh) == 2,\
-            "The value to set `size` must contatins 2 elements means [width, height], but now it contains {} elements.".format(
-            len(wh))
-        self._model.size = wh
+        return self._model.postprocessor