MemoryDataLayer Usage Question

[Eric Martinson]

I am using the bvlc_alexnet model with an added MemoryDataLayer to classify images from a live camera stream in C++. I am using a modified version of the code posted previously at https://github.com/BVLC/caffe/issues/499 by joeupwu.

detection_caffe::detection_caffe(string prototxt_file, string caffe_model)

{

    caffe_net = new Net<float>(prototxt_file, caffe::TEST);

    caffe_net->CopyTrainedLayersFrom(caffe_model);

    
    memory_data_layer = boost::static_pointer_cast<MemoryDataLayer<float> >(caffe_net->layer_by_name("data"));

}

void detection_caffe::classifySingleImage(const cv::Mat &rgb, std::vector<float> &prob_out)

{

    std::vector<int> labels(1, 0);

    cv::resize(rgb,cv_img,sz,0,0,cv::INTER_CUBIC);

    std::vector<cv::Mat> images(1, cv_img);

    memory_data_layer->AddMatVector(images, labels);

    float loss;

    caffe_net->ForwardPrefilled(&loss);

    boost::shared_ptr<Blob<float> > prob = caffe_net->blob_by_name("prob");
         prob_out.resize(prob->count());

    for (int i = 0; i < prob->count(); i++)

    {

        prob_out[i] = prob->cpu_data()[i];
    }
}

However, when I run this code, I get a steady list of warnings:

W0804 10:53:22.870311 9671 memory_data_layer.cpp:87] MemoryData does not transform array data on Reset()

W0804 10:53:22.878911 9671 memory_data_layer.cpp:87] MemoryData does not transform array data on Reset()

W0804 10:53:22.887466 9671 memory_data_layer.cpp:87] MemoryData does not transform array data on Reset()

W0804 10:53:22.896996 9671 memory_data_layer.cpp:87] MemoryData does not transform array data on Reset()

What does this mean? Is there an operation I am supposed to be performing that I am not currently running? I can, of course, comment out the line in memory_data_layer.cpp and recompile, but I don't know why it is there in the first place, and whether or not I am supposed to be using it differently.

[Coert van Gemeren]

Looking at the function AddMatVector(...) in memory_data_layer.cpp (line 57) you can see that first:
this->data_transformer_->Transform(mat_vector, &added_data_);
is called, after that
Reset(...)
is called

Reset generates the warning, though Transform should already have applied all transformations (mirror, scale, crop...). The warning seems irrelevant in this case.


Op dinsdag 4 augustus 2015 20:06:29 UTC+2 schreef Eric Martinson: