将OpenCV IplImage或Mat复制到Freeimage FIBITMAP中 [英] Copy OpenCV IplImage or Mat into Freeimage FIBITMAP

问题描述

我需要在FreeImage(FIBITMAP)和OpenCV格式(IplImage和/或Mat)之间交换数据.我很好地将数据从FIBITMAP导入IplImage或Mat中，因为FreeImage为您提供了功能FreeImage_GetScanLine，您可以将OPenCV imageData ptr设置为等于.

I need to exchange data between FreeImage (FIBITMAP) and OpenCV format (IplImage and/or Mat). I'm fine with getting data from a FIBITMAP into an IplImage or Mat since FreeImage gives you a function FreeImage_GetScanLine which you can set the OPenCV imageData ptr equal to.

但是，我坚持如何做相反的事情，即一旦有了OpenCV映像，如何将其数据转换为FreeImage映像?

However, I'm stuck on how to do the reverse, i.e. once I have an OpenCV image, how do I get its data into a FreeImage image?

推荐答案

复制数据指针时要格外小心，很多图像格式都有填充，以便在4字节边界上每行开始.

You have to be a little careful just copying the data pointer, a lot of image formats have padding to start each new line on eg a 4byte boundary.

如果您的图像具有GetScanLine()函数，那么制作一个空的plImage */cv :: Mat并使用从GetScanLine()返回的指针和cv ::.ptr()成员复制内存的每一行可能更安全.马特

If your image has a GetScanLine() function then it's probably safer to make an empty plImage*/cv::Mat and memcopy each row with the pointer returned from GetScanLine() and the .ptr() member of cv::MAt

cv::Mat &src        
int srcRowBytes = width  * src.elemSize();

for (int ih=0;ih<height;ih++) {
    memcpy(dest.pointer_to_row(ih),src.ptr(ih),srcRowBytes);
}

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