text: //
  //  GPUImageHistogramEqualizationFilter.h
  //  FilterShowcase
  //
  //  Created by Adam Marcus on 19/08/2014.
  //  Copyright (c) 2014 Sunset Lake Software LLC. All rights reserved.
  //
  
  #import "GPUImageFilterGroup.h"
  #import "GPUImageHistogramFilter.h"
  #import "GPUImageRawDataOutput.h"
  #import "GPUImageRawDataInput.h"
  #import "GPUImageTwoInputFilter.h"
  
  @interface GPUImageHistogramEqualizationFilter : GPUImageFilterGroup
  {
      GPUImageHistogramFilter *histogramFilter;
      GPUImageRawDataOutput *rawDataOutputFilter;
      GPUImageRawDataInput *rawDataInputFilter;
  }
  
  @property(readwrite, nonatomic) NSUInteger downsamplingFactor;
  
  - (id)initWithHistogramType:(GPUImageHistogramType)newHistogramType;
  
  @end
  