ios图像文字和颜色增强过滤器

Question

我想CIFilter和GPUImage过滤器应用图像上的各种效果（亮度，对比度，饱和度等），但我很挣扎，需要像下面显示的增强：

增强滤波器之前

增强后过滤

CIFilter代码，我想：

NSDictionary *options = @{ CIDetectorImageOrientation : 
           [[resultImage properties] valueForKey:kCGImagePropertyOrientation] }; 
NSArray *adjustments = [resultImage autoAdjustmentFiltersWithOptions:options]; 
for (CIFilter *filter in adjustments) { 
    [filter setValue:resultImage forKey:kCIInputImageKey]; 
    resultImage = filter.outputImage; 
} 

GPUImage筛选：

UIImage *inputImage = [UIImage imageNamed:@"Msource.png"]; 
GPUImageAdaptiveThresholdFilter *stillImageFilter = [[GPUImageAdaptiveThresholdFilter alloc] init]; 
stillImageFilter.blurRadiusInPixels = 10.0;// adjust this to tweak the blur radius of the filter, defaults to 4.0 

UIImage *filteredImage = [stillImageFilter imageByFilteringImage:inputImage]; 

Answer 1

在此处输入代码//希望这有助于其迅速3：

 var aCIImage = CIImage(); 
     var contrastFilter: CIFilter!; 
     var brightnessFilter: CIFilter!; 
     var gaussianBlurFilter: CIFilter!; 
     var pointFilter: CIFilter!; 
     var vignettFilter : CIFilter!; 
     var context = CIContext(); 
     var outputImage = CIImage(); 
     var newUIImage = UIImage(); 
     var finalImage = UIImage() 

     DispatchQueue.main.async 
         { 
          self.gaussianBlurFilter = CIFilter(name: "CIExposureAdjust"); 
          self.gaussianBlurFilter.setValue(self.aCIImage, forKey: "inputImage") 

          self.gaussianBlurFilter.setValue(NSNumber(value: sender.value), forKey: "inputEV"); 

          self.outputImage = self.gaussianBlurFilter.outputImage!; 

          let imageRef = self.context.createCGImage(self.outputImage, from: self.outputImage.extent) 

          self.newUIImage = UIImage(cgImage: imageRef!) 
          self.testView?.image = self.newUIImage; 
        } 


// 

https://i.stack.imgur.com/s1STp.png

https://i.stack.imgur.com/uU0Oz.png

链接：对于演示项目。

https://drive.google.com/open?id=0B-EIC_4IXtA9UjFwT3o0dXI1OTA