How to process CIFilter using CPU instead of GPU?

Question

Does anyone know how to tell core image to process a CIImage through a CIFilter using the CPU instead of the GPU? I need to process some very large images and I get strange results using the GPU. I don't care how long it takes to CPU will be fine.

Answer 1

Not an answer, but you always can re-write CIkernel as function which operates on pixel RGB value, and after that apply that function in a loop on unsigned char [] data of image and convert result to CIImage.

Answer 2

This is an interesting idea. Could you point me to an example or any sor of documentation on this? I'm a bit confused about how this would be implemented. Thanks!