#import "GPUImageFilterGroup.h"
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#import "GPUImageLowPassFilter.h"
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#import "GPUImageDifferenceBlendFilter.h"
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@interface GPUImageHighPassFilter : GPUImageFilterGroup
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{
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GPUImageLowPassFilter *lowPassFilter;
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GPUImageDifferenceBlendFilter *differenceBlendFilter;
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}
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// This controls the degree by which the previous accumulated frames are blended and then subtracted from the current one. This ranges from 0.0 to 1.0, with a default of 0.5.
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@property(readwrite, nonatomic) CGFloat filterStrength;
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@end
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