Is there any easier and shorter way to convert CGImage to gray scale than
- turning it to
CIImage - apply
CIFilter - turn to
NSBitmapImageRepand then back toCGImage?
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sunkehappy
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hockeyman
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shorter in terms of? execution time? – jimpic Nov 21 '12 at 13:15
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Possible duplicate of http://stackoverflow.com/questions/1298867/convert-image-to-grayscale – propstm Nov 21 '12 at 13:28
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@jimpic Execution time and memory consumption – hockeyman Nov 21 '12 at 13:33
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@propstm its about UIImage turning to grayscale, and I am asking for CGImage to grayscale, and by the way, mine question is about doing it in os x. – hockeyman Nov 21 '12 at 13:34
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you can always get a CGImage from a UIImage using [myImage CGImage] – jimpic Nov 21 '12 at 16:49
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It is not iOS. It is OS X, so I have no ability to use UIImage. – hockeyman Nov 22 '12 at 14:00