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Is there any way to find GPUImageFilter correspond CIFilter?

ios,gpuimage,cifilter,gpuimagestillcamera
I wrote my iOS image processing app using CIFilters. Now I am going to replace the filters as GPUImageFilters. But I don't know how can I find the corresponding GPUImageFilters from previous CIFilters? Is there any way to find exactly same or similar GPUImageFilters with CIFilters? Some of CIFilter names...

GPUImage show histogram in another view

ios,objective-c,histogram,gpuimage,gpuimagestillcamera
I am currently trying to display a histogram using GPUImage. I currently have following code: GPUImageOutput<GPUImageInput> *filter = [[GPUImageHistogramFilter alloc] initWithHistogramType:kGPUImageHistogramLuminance]; [self.stillCamera removeTarget:filter]; GPUImageGammaFilter *gammaFilter = [[GPUImageGammaFilter alloc] init]; [self.stillCamera addTarget:gammaFilter]; [gammaFilter addTarget:filter]; GPUImageHistogramGenerator *histogramGraph = [[GPUImageHistogramGenerator alloc] init]; [histogramGraph...