OpenCV2.3 imwrite saves black image

Question

I am trying to save a JPEG image onto the disk using imwrite, seems that I am missing something. I am always getting a black image of around 4KBs. What am I doing wrong here? Im

Answer 1

imwrite prints on a 0 to 255 scale, but your image is in a 0 to 1 scale. To scale up, use this line:

image.convertTo(image, CV_8UC3, 255.0);