cgcolorspace

Is there a Cocoa Touch way to convert colors from one color space to another? At the end of this code: UIColor *grey = [UIColor colorWithWhite: 0.5 alpha: 1.0]; CGColorRef greyRef = [grey CGColor]; int x = CGColorGetNumberOfComponents(greyRef); ... x is 2. The reason I need this is I'm trying to copy colors to a list of color components for CGGradientCreateWithColorComponents , which needs all colors in a single colorspace. The problem is that grey is in the grayscale colorspace, rather than the RGB one. (The name escapes me at the moment, but it isn't important.) CGGradientRef createGradient

I need to color the skin of the face... How do i find the skin color? now i get the skin color by RGB pixel value ... Still i am facing the problem i was matching the color coordinates to match the skin by certain color range... but still some area of the face not fall in my range of colors then it is not color that area.. other than the face area may fall that region, that area also colored... Any idea about my issue... Thanks in advance.... MY code: -(void)colorImageBySliderValue:(float)value WithImage:(UIImage*)needToModified { CGContextRef ctx; CGImageRef imageRef = needToModified.CGImage;