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fix: guard against division by zero in create_gaussian_filter() - #3171
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…ian_filter() When sigma is very small, gaussian(max_size/2, sigma) can underflow to zero, causing a division by zero in the loop condition. Add epsilon to the denominator.
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Thanks @lippinj for finding this. I changed the cutoff condition to a division-free comparison so it handles zero tails without shifting the cutoff with epsilon, and added kernel, boundary, blur, and floating-point exception regression tests. |
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When sigma is very small, gaussian(max_size/2, sigma) can underflow to zero, causing a division by zero in the loop condition. Add epsilon to the denominator.