Does anyone know of a way to simply and effectively brighten a UIImage by a specific amount? I am currently fiddling with the Apple Sample Code...

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Customer

Does anyone know of a way to simply and effectively brighten a UIImage by a specific amount? I am currently fiddling with the Apple Sample Code Example GLImageProcessing with poor results...My app currently does not use OpenGLES or EAGLViews and it is awkward trying to bridge the technology.

Posted 3/21/2011

Rashid Mohammad

Programmer

You could render the UIImage into a CGBitmapContext. And then you should have a pointer to the raw bytes of the image. At that point you could do anything you'd like with the bytes, including brighten them. After that you can create a new CGImageRef from the bytes.

This would all be on the CPU, which might not perform as well as an OpenGL solution depending on the image size.

Posted 3/21/2011

Customer

It works. Thanks

Posted 3/21/2011

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Does anyone know of a way to simply and effectively brighten a UIImage by a specific amount? I am currently fiddling with the Apple Sample Code...

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