Question

How can I find the difference of current pixel value and the next pixel value of a binary image and then set it to the current pixel using C and opencv?

Answer 1

1) Check this latest OpenCV tutorial

or

2 ) Try using [cvGet2D][2] function and [cvSet2D][3] function.

Here is the pseudocode:

for i<image.width:
   for j<image.height:
       current = cvGet2D(array,j,i)
       next = cvGet2D(array,j+1,i+1)
       // set the value
       cvSet2D(array,j+1,i+1,current)

Try to implement it.

Below is an example on how to access pixel values and set pixel values to understand usage of above two functions.

CvScalar s;
s=cvGet2D(img,i,j);
Int value = s.val[k];
// setting new values
s.val[k]=111;
cvSet2D(img,i,j,s);