KentarouKanno/CoreImage.md

## CoreImage.md

      
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              CoreImage.md
            
          
    CoreImage (CIFilter)

【iOS】【swift】たった数行で画像のフィルタ/エフェクトが実現できる超便利フレームワークCoreImage
// セピア【CISepiaTone】

@IBOutlet weak var photoImageView: UIImageView!

if let ciImage = CIImage(image: self.photoImageView.image!), let ciFilter = CIFilter(name: "CISepiaTone") {
    ciFilter.setValue(ciImage, forKey: kCIInputImageKey)
    ciFilter.setValue(1.0, forKey: "inputIntensity")
    let ciContext = CIContext(options: nil)
    
    if let outputImage = ciFilter.outputImage {
        let cgimg = ciContext.createCGImage(outputImage, fromRect: outputImage.extent)
        photoImageView.image = UIImage(CGImage: cgimg, scale:1.0, orientation:UIImageOrientation.Up)
    }
}