(PECL gmagick >= Unknown)
Gmagick::getimagebackgroundcolor — Returns the image background color
Returns the image background color.
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
Returns an GmagickPixel set to the background color of the image.
锟斤拷锟斤拷时锟阶筹拷 GmagickException锟斤拷