(PECL gmagick >= Unknown)
Gmagick::blurimage — Adds blur filter to image
public Gmagick::blurimage(float $radius, float $sigma, int $channel = ?): Gmagick
Adds blur filter to image.
radiusBlur radius
sigmaStandard deviation
The blurred Gmagick object
Throws an GmagickException on error.
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https://www.php.net/manual/en/gmagick.blurimage.php