(PECL gmagick >= Unknown)
Gmagick::setimagecolorspace — Sets the image colorspace
colorspace
The image colorspace: UndefinedColorspace, RGBColorspace, GRAYColorspace, TransparentColorspace, OHTAColorspace, XYZColorspace, YCbCrColorspace, YCCColorspace, YIQColorspace, YPbPrColorspace, YPbPrColorspace, YUVColorspace, CMYKColorspace, sRGBColorspace, HSLColorspace, or HWBColorspace.
The Gmagick object on success
错误时抛出 GmagickException。