CODEWITHSUNDEEP
iphoneiosios5core-image
totocaster
totocaster

Reputation: 6373

How can you use Core Image filters to adjust contrast or sharpness?

How do you adjust contrast or sharpness using the Core Image framework? Which filters should be used and why?

Are there any examples which show how to do this?

Upvotes: 5

Views: 6329

Answers (1)

akaru
akaru

Reputation: 6317

Contrast is easy:

CIFilter * controlsFilter = [CIFilter filterWithName:@"CIColorControls"];
[controlsFilter setValue:myImage forKey:kCIInputImageKey];
[controlsFilter setValue:@(1.5) forKey:@"inputContrast"];//and so on
displayImage = controlsFilter.outputImage; //and do a conversion from CIImage

However, for sharpness, you're out of luck, as that's not included in the filters for iOS 5.0.

Upvotes: 14

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