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How to execute an image with multiple kernel image filters (without resetting the result)

I have a project with several kernel image filters, each of which is associated with a different slider. Everything works, but I just did not understand the best way to transfer the results from one filter to another. Each time, each reset changes any of the other sliders. The reason is that the original image created from the imported image fits into each filter as the input image. But you don’t know how to fix it.

I am trying to imagine a better way to pass the results of multiple filters into a single output image.

here is the project: owolf.net/uploads/StackOverflow/CoreImageFilter.zip

and some of the viewControler code inserted below:

- (void)viewDidLoad
{
    //Create CIImage
    UIImage *aUIImage = [imageView image];
    CGImageRef aCGImage = aUIImage.CGImage;
    aCIImage = [CIImage imageWithCGImage:aCGImage];

    //Create context
    context = [CIContext contextWithOptions:nil];

    saturationFilter = [CIFilter filterWithName:@"CIColorControls" keysAndValues: @"inputImage", aCIImage, nil];
    brightnessFilter = [CIFilter filterWithName:@"CIColorControls" keysAndValues: @"inputImage", aCIImage, nil];
    contrastFilter = [CIFilter filterWithName:@"CIColorControls" keysAndValues: @"inputImage", aCIImage, nil];
        [super viewDidLoad];
}


- (IBAction)saturationSliderValueChanged:(id)sender {
    outputImage = [saturationFilter outputImage];
    CGImageRef cgimg = [context createCGImage:outputImage fromRect:[outputImage extent]];
    newUIImage = [UIImage imageWithCGImage:cgimg];
    CGImageRelease(cgimg);
    [imageView setImage:newUIImage];   
}

- (IBAction)brightnessSliderValueChanged:(id)sender {
    [brightnessFilter setValue:[NSNumber numberWithFloat:brigtnessSlider.value] forKey: @"inputBrightness"];
    outputImage = [brightnessFilter outputImage];
    CGImageRef cgimg = [context createCGImage:outputImage fromRect:[outputImage extent]];
    newUIImage = [UIImage imageWithCGImage:cgimg];
    CGImageRelease(cgimg);
    [imageView setImage:newUIImage];
}

- (IBAction)contrastSliderValueChanged:(id)sender { 
    [contrastFilter setValue:[NSNumber numberWithFloat:contrastSlider.value] forKey: @"inputContrast"];
    outputImage = [contrastFilter outputImage];
    CGImageRef cgimg = [context createCGImage:outputImage fromRect:[outputImage extent]];
    newUIImage = [UIImage imageWithCGImage:cgimg];
    CGImageRelease(cgimg);
    [imageView setImage:newUIImage];
}
+5
2

, .. :

CIImage *adjustedImage = self.originalImage;

[self.vibranceFilter setValue:adjustedImage forKey:@"inputImage"];
adjustedImage = [self.vibranceFilter outputImage];

[self.hueFilter setValue:adjustedImage forKey:@"inputImage"];
adjustedImage = [self.hueFilter outputImage];

[self.vignetteFilter setValue:adjustedImage forKey:@"inputImage"];
adjustedImage = [self.vignetteFilter outputImage];

CGImageRef cgImage = [self.imageContext createCGImage:adjustedImage fromRect:[adjustedImage extent]];

self.imageView.image = [UIImage imageWithCGImage:cgImage];

CGImageRelease(cgImage);

adjustedImage Core Image. , , - .

+10

, aCIImage. - :

[filter1 setValue:aCIImage forKey:@"inputImage"];

filter1Output = [filter1 outputImage];
[filter2 setValue:filter1Output forKey:@"inputImage"];

.

+2

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