image processing - What should be the kernel size for deviation of 0.5 -


the implementation asked me remove noise applying gaussian blur ( sigma = 0.5 ), didn't mention kernel size. now, confused kernel size should use ?

the gaussian formula has no actual endpoint, goes on infinity. it's determine point @ can cut off without affecting results.

for image processing can cut off @ point formula reaches 1/256 or less. sigma of 0.5 1.4833; since kernel coordinates whole numbers means can truncate 1. means kernel has go +/- 1 center, or 3x3.


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