(PECL imagick 2.0.0)
ImagickPixel::isSimilar — Check the distance between this color and another
本函数还未编写文档，仅有参数列表。
Checks the distance between the color described by this ImagickPixel object and that of the provided object, by plotting their RGB values on the color cube. If the distance between the two points is less than the fuzz value given, the colors are similar.
The ImagickPixel object to compare this object against.
The maximum distance within which to consider these colors as similar. The theoretical maximum for this value is the square root of three (1.732).
Returns TRUE on success.