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ImagickPixel::getColorQuantum — Returns the color of the pixel in an array as Quantum values
Returns the color of the pixel in an array as Quantum values. If ImageMagick was compiled as HDRI these will be floats, otherwise they will be integers.
本函数还未编写文档，仅有参数列表。
此函数没有参数。
Returns an array with keys "r", "g",
"b", "a".