(PECL imagick 2.0.0)
ImagickPixel::getHSL — Returns the normalized HSL color of the ImagickPixel object
本函数暂无文档，仅有参数列表。
Returns the normalized HSL color described by the ImagickPixel object, with each of the three values as floating point numbers between 0.0 and 1.0.
Returns the HSL value in an array with the keys "hue", "saturation", and "luminosity". Throws ImagickPixelException on failure.