Convert cv::Mat into tensorflow::Tensor with uint8 datatype using tensorflow c++ API

mat2tensor.cpp

tensorflow::Tensor matToTensor(const cv::Mat &frame){
  int height = mat.rows;
  int width = mat.cols;
  int depth = mat.channels();
  Tensor inputTensor(tensorflow::DT_UINT8, tensorflow::TensorShape({1, height, width, depth}));
  auto inputTensorMapped = inputTensor.tensor<tensorflow::uint8, 4>();

  cv::Mat frame;
  mat.convertTo(frame, CV_8UC3);
  const tensorflow::uint8* source_data = (tensorflow::uint8*) frame.data;
  for (int y; y<height; y++){
    const tensorflow::uint8* source_row = source_data + (y*width*depth);
    for (int x; x<width; x++){
        const tensorflow::uint8* source_pixel = source_row + (x*depth);
        for (int c; c<depth; c++){
            const tensorflow::uint8* source_value = source_pixel + c;
            inputTensorMapped(0, y, x, c) = *source_value;
        }
    }
  }
  return inputTensor;
}