Windows runtime WinML onnx示例产生错误的结果

我遵循这个WinML创建一个回归模型并对其进行推理。 我尝试使用WinML/WinRT运行onnx模型，但结果是错误的。我强制将数据读取为RGB而不是BGR，但其中包含alpha组件，例如RGBA，我怀疑错误的结果是由于alpha造成的，我在原始模型中没有alpha。我如何解决这个问题？

当我从解码器读取像素时，我得到RGBA，其中A（alpha）设置为255。我试图用1替换它，但解码器似乎是不可变的。 如果我可以确保输入到模型的像素是正确的，那么这将产生正确的结果。

请按照创建视频帧的步骤进行操作，创建视频帧时不必担心alpha通道，因为WinML无论如何都会忽略此通道。如果需要，可以调用在不同像素格式之间进行转换

VideoFrame LoadImageFile(hstring filePath)
{
    printf("Loading the image...\n");
    DWORD ticks = GetTickCount();
    VideoFrame inputImage = nullptr;

    try
    {
        // open the file
        StorageFile file = StorageFile::GetFileFromPathAsync(filePath).get();
        // get a stream on it
        auto stream = file.OpenAsync(FileAccessMode::Read).get();
        // Create the decoder from the stream
        BitmapDecoder decoder = BitmapDecoder::CreateAsync(stream).get();
        // get the bitmap
        SoftwareBitmap softwareBitmap = decoder.GetSoftwareBitmapAsync().get();
        // load a videoframe from it
        inputImage = VideoFrame::CreateWithSoftwareBitmap(softwareBitmap);
    }
    catch (...)
    {
        printf("failed to load the image file, make sure you are using fully qualified paths\r\n");
        exit(EXIT_FAILURE);
    }

    ticks = GetTickCount() - ticks;
    printf("image file loaded in %d ticks\n", ticks);
    // all done
    return inputImage;
}

---

这回答了你的问题吗？

VideoFrame LoadImageFile(hstring filePath)
{
    printf("Loading the image...\n");
    DWORD ticks = GetTickCount();
    VideoFrame inputImage = nullptr;

    try
    {
        // open the file
        StorageFile file = StorageFile::GetFileFromPathAsync(filePath).get();
        // get a stream on it
        auto stream = file.OpenAsync(FileAccessMode::Read).get();
        // Create the decoder from the stream
        BitmapDecoder decoder = BitmapDecoder::CreateAsync(stream).get();
        // get the bitmap
        SoftwareBitmap softwareBitmap = decoder.GetSoftwareBitmapAsync().get();
        // load a videoframe from it
        inputImage = VideoFrame::CreateWithSoftwareBitmap(softwareBitmap);
    }
    catch (...)
    {
        printf("failed to load the image file, make sure you are using fully qualified paths\r\n");
        exit(EXIT_FAILURE);
    }

    ticks = GetTickCount() - ticks;
    printf("image file loaded in %d ticks\n", ticks);
    // all done
    return inputImage;
}