(PECL imagick 3 >= 3.3.0)
ImagickPixel::isPixelSimilarQuantum — Returns whether two colors differ by less than the specified distance
Returns true if the distance between two colors is less than the specified distance. The fuzz value should be in the range 0-QuantumRange. The maximum value represents the longest possible distance in the colorspace. e.g. from RGB(0, 0, 0) to RGB(255, 255, 255) for the RGB colorspace
color
fuzz