Arkerone Arkerone - 3 months ago 19
C++ Question

OpenCV how to imwrite a RGB image

How do I write a

RGB
image with the function
cv::imwrite()
? So far all my attempts lead into writing a
BGR
image instead.

My matrix object is a
cv::Mat
.

Answer

The cv::imwrite() function correctly writes an image file if the input cv::Matis in BGR order (which is the case if you let OpenCV create it). If you created the image by yourself, you have to convert the color ordering before, for example by calling as suggested by bamboove cv::cvtColor(in, out, CV_RGB2BGR); if you created an RGB image.

(Pay attention to the color conversion code, it's slightly different from bamboon's.)