Question

Am using cvLoadImage from OpenCV 2.1 on Windows to load a .bmp file. (legacy app, maintaining code, not new development.)

Is it loading it in RGB or BGR order? Documentation http://opencv.willowgarage.com/documentation/c/reading_and_writing_images_and_video.html does not say.

Answer 1

The usual order is BGR.Try this code with your own single pixel image.

IplImage *img = cvLoadImage("c:\\pixel.bmp");
CvScalar s;
s=cvGet2D(img,0,0);
cout << s.val[0];  //first color value (blue)
cout << s.val[1];  //second color value (green)
cout << s.val[2];  //third color value (red)