Before you told us this matrix would sharpen an image, I was thinking about adding contrast as it effectively is subtracting the surrounding pixels. Are there different effects that share themes (such as negative numbers) in matrices?
ben_barnett
If anyone is having a hard time understanding 2D convolution or why this particular filter sharpens an image, this gif might help! https://commons.wikimedia.org/wiki/File:3D_Convolution_Animation.gif
Before you told us this matrix would sharpen an image, I was thinking about adding contrast as it effectively is subtracting the surrounding pixels. Are there different effects that share themes (such as negative numbers) in matrices?
If anyone is having a hard time understanding 2D convolution or why this particular filter sharpens an image, this gif might help! https://commons.wikimedia.org/wiki/File:3D_Convolution_Animation.gif