ImageMagick の blur 処理について -blur radius Q1.() () > -blur radius{xsigma} Q2. > Radius should be at least twice the Sigma value, though three times > will produce a more accurate result. ↓ > Radius23

ImageMagick blur (Wikipedia) php `Imagick::motionBlurImage` php [ `0` ]




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`2σ` `3σ` `3σ`
# `6σ`