– What makes Gaussian blur, well, Gaussian? What exactly makes it different from other types of blurring?

Question

– What makes Gaussian blur, well, Gaussian? What exactly makes it different from other types of blurring?

In: 3

Answer 1

In Gaussian blur each pixel receives a weighed influence from many surrounding pixels in both vertical and horizontal directions, theoretically infinitely many but in practice until some set cutoff of the contribution. Applying a multiplier to each and adding up the values takes relatively many calculations. A simpler method is a box blur where an area of pixels are averaged together without weights. This creates aliasing, or boxy, repetitive pattern. Most programs approximate gaussian blur with several stacked box blurs.