The problem seems to be the domain of the filter algorithms, not IMagick implementation.
Catrom, sinc, cubic, quadratic, while unaffected are e.g. Sometimes only some values gives artifacts, like Hanning with my test image: 0.0 blur is fine, 0.1 produces artefacts.Īffected filters are e.g. As far, as I see, it happens with blur values smaller than 0.25 (sometimes less) and goes worse to the point of 0 - black image. Some size, image and filter and blur combinations causes artifacts or even make image completely scrambled.
#Php resize image archive#
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