在c ++/cx中将SoftwareBitmap或WriteableBitmap转换为cv :: Mat [英] Converting a SoftwareBitmap or WriteableBitmap to cv::Mat in c++/cx

问题描述

我试图在c ++/cx Microsoft通用应用程序中将WriteableBitmap转换为cv :: Mat.但是，当我尝试使用创建的Mat进行处理时，出现以下错误:

I tried to convert a WriteableBitmap to a cv::Mat in a c++/cx Microsoft universial App. But when I try to progress with the created Mat, I get the following error:

这是我的代码:

void App1::MainPage::processImage(SoftwareBitmap^ bitmap)
{
     WriteableBitmap^ wb = ref new WriteableBitmap(bitmap->PixelWidth, bitmap->PixelHeight);
     bitmap->CopyToBuffer(wb->PixelBuffer);
     Mat img_image(wb->PixelHeight, wb->PixelWidth, CV_8UC3,(void*)wb->PixelBuffer);
     //next step results in error
     cvtColor(img_image, img_image, CV_BGR2BGRA);
     ...
}

所以我的最后一个问题是: 如何将SoftwareBitmap或WriteableBitmap转换为cv :: Mat?

So my final question: How to convert the SoftwareBitmap or the WriteableBitmap to a cv::Mat?

推荐答案

问题是

The problem is that PixelBuffer is not a void *, it is an IBuffer^.

要获取原始数据，可以使用

To get at the raw data, you can either use the IBufferByteAccess interface if you're comfortable with COM programming, or you can initialize a DataReader with an IBuffer if you'd prefer to stay in WinRT (although this technique will make a copy of the data).

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