I've got the concept of blurring an image down, but I have not a clue as to how to implement it. I know it starts with manipulation of a pixel and it's eight neighbors. I'm using a .pgm as an example, so manipulating integers is the goal.
c c c
c 1 c
c c c <-------so that's the problem
Now take the mean of the surrounding pixels right?
I've also seen it as 1/4 * original pixel + 1/8 * sum of horizontal and vertical pixels + 1/16 * sum of diagonal pixels.
Can someone lead me down the right track on coding this stuff?
Also, isn't there a problem with the extreme edges if the algorithm is made like above? So you'd end up with
- - - - -
- c c c -
- c 1 c -
- c c c -
- - - - - with the hyphens being unfiltered?
Any help if greatly appreciated
