- Forming a new image whose pixel values are transformed from original pixel values
 - See system (cv)
 
moving average
- linear shift invariant (LSI)

 - for convolution
 - represent k,l as n-k and m-l BECAUSE
- we shift the flipped kernel across the image to center the kernel over the corresponding input image pixel
 - multiply values of input image in neighborhood of (n,m) with corresponding values of flipped kernel
 - sum products
 - (just legacy from pure math)
 
 
image segmentation
