2D Convolution for Image Processing

2D convolution animation video image processing

[RicardoLizarraga-ufzn]

thank you, helped to understand the concept

[mr.crazyunknown]

if the kernel wasn't symmetric, wouldn't we fold (flip in both dimensions) the kernel before multiplying at each and every cell?

[rishabhtibrewal]

Why does the kernel is multiplied with its middle point on the top left corner, and the size of output matrix should be 3x2, instead of being same, could you please clear

[kerimhasanyildirim]

what does it mean when there is a underscored cell in signal and filter

[yarenkaya]

Very nice and explanatory example. Yet, this seems to me not the ordinary convolution. Why does the size of the matrix remain the same? If you answer, I would be glad

[onurosman]

For example if h=[1 1 1;0 0 0;-1 -1 -1], after reflextion on x and y coordinates, it becomes [-1 -1 -1;0 0 0;1 1 1]. If h=[1 0 -1;1 0 -1;1 0 -1], it becoms [-1 0 1;-1 0 1;-1 0 1]