(PECL imagick 2.0.0)
ImagickPixel::getHSL — Returns the normalized HSL color of the ImagickPixel object
本函数还未编写文档，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.
Note:
Available with ImageMagick library version 6.2.9 and higher.
rio at rio dot st (2009-08-06 22:25:14)
This function needs ImageMagick > 6.2.8
In imagickpixel_class.c
#if MagickLibVersion > 0x628
/* {{{ proto array ImagickPixel::getHSL()
Returns the normalized HSL color of the pixel wand in an array with the keys "hue", "saturation", and "luminosity".
*/