How to access the elements of single channel IplImage in Opencv

Question

How can I access the Elements of an IplImage (single channel and IPL_DEPTH_8U depth).

I want to change the pixel value at a particu

Answer 1

The fast way to get the pixel value is use macro.

CV_IMAGE_ELEM( image_header, elemtype, y, x_Nc ) 

And in your case, the Image is single channel.So you can get the i,j pixel value by

CV_IMAGE_ELEM(image, unsigned char, i, j)