• DDGScreenShot —图片加高斯模糊,老电影效果


    写在前面

    所有功能演示

    imageimage

    有了简单的图片滤镜基础,接下来就可以做一些难一点操作,图片合成老电影的特效
    
    

    具体代码

    //这个是高斯模糊的代码,比较的简单
    func gaussianBlurFilmEffect() {
            filter = CIFilter(name: "CIGaussianBlur")
            filter.setValue(10.0, forKey: "inputRadius")
            let inputImage = CIImage(image: originalImage)
            filter.setValue(inputImage, forKey: kCIInputImageKey)
            let outputImage =  filter.outputImage!
            let cgImage = context.createCGImage(outputImage, from: outputImage.extent)
            self.imageView.image = UIImage(cgImage: cgImage!)
    
        }
        
    
        
    

    这个是合成老电影的过程)

    中间有一些屏蔽的代码是做输出校验用的,查看当前的输出

    func oldFilmEffect(){
            let inputImage = CIImage(image: originalImage)!
            // 1.创建CISepiaTone滤镜(棕绿色)
            let sepiaToneFilter = CIFilter(name: "CISepiaTone")!
            sepiaToneFilter.setValue(inputImage, forKey: kCIInputImageKey)
            //参数是强度
            sepiaToneFilter.setValue(1, forKey: kCIInputIntensityKey)
    //        let outputImage = sepiaToneFilter.outputImage!
    //        let cgImage = context.createCGImage(outputImage, from: outputImage.extent)
    //        imageView.image = UIImage(cgImage: cgImage!)
            // 2.创建白班图滤镜
            let whiteSpecksFilter = CIFilter(name: "CIColorMatrix")!
            whiteSpecksFilter.setValue(CIFilter(name: "CIRandomGenerator")!.outputImage!.cropped(to: inputImage.extent), forKey: kCIInputImageKey)
            whiteSpecksFilter.setValue(CIVector(x: 0, y: 1, z: 0, w: 0), forKey: "inputRVector")
            whiteSpecksFilter.setValue(CIVector(x: 0, y: 1, z: 0, w: 0), forKey: "inputGVector")
            whiteSpecksFilter.setValue(CIVector(x: 0, y: 1, z: 0, w: 0), forKey: "inputBVector")
            whiteSpecksFilter.setValue(CIVector(x: 0, y: 0, z: 0, w: 0), forKey: "inputBiasVector")
    //        let outputImage = whiteSpecksFilter.outputImage!
    //        let cgImage = context.createCGImage(outputImage, from: outputImage.extent)
    //        imageView.image = UIImage(cgImage: cgImage!)
            // 3.把CISepiaTone滤镜和白班图滤镜以源覆盖(source over)的方式先组合起来
            let sourceOverCompositingFilter = CIFilter(name: "CISourceOverCompositing")!
            sourceOverCompositingFilter.setValue(whiteSpecksFilter.outputImage, forKey: kCIInputBackgroundImageKey)
            sourceOverCompositingFilter.setValue(sepiaToneFilter.outputImage, forKey: kCIInputImageKey)
            // 4.用CIAffineTransform滤镜先对随机噪点图进行处理 应用坐标系
            let affineTransformFilter = CIFilter(name: "CIAffineTransform")!
            affineTransformFilter.setValue(CIFilter(name: "CIRandomGenerator")!.outputImage!.cropped(to: inputImage.extent), forKey: kCIInputImageKey)
            affineTransformFilter.setValue(NSValue(cgAffineTransform: CGAffineTransform(scaleX: 1.5, y: 25)), forKey: kCIInputTransformKey)
    //        let outputImage = affineTransformFilter.outputImage!
    //        let cgImage = context.createCGImage(outputImage, from: outputImage.extent)
    //        imageView.image = UIImage(cgImage: cgImage!)
            // 5.创建蓝绿色磨砂图滤镜
            let darkScratchesFilter = CIFilter(name: "CIColorMatrix")!
            darkScratchesFilter.setValue(affineTransformFilter.outputImage, forKey: kCIInputImageKey)
            darkScratchesFilter.setValue(CIVector(x: 4, y: 0, z: 0, w: 0), forKey: "inputRVector")
            darkScratchesFilter.setValue(CIVector(x: 0, y: 1, z: 0, w: 0), forKey: "inputGVector")
            darkScratchesFilter.setValue(CIVector(x: 0, y: 0, z: 0, w: 0), forKey: "inputBVector")
           darkScratchesFilter.setValue(CIVector(x: 0, y: 0, z: 0, w: 0), forKey: "inputAVector")
            darkScratchesFilter.setValue(CIVector(x: 0, y: 1, z: 1, w: 1), forKey: "inputBiasVector")
            // 6.用CIMinimumComponent滤镜把蓝绿色磨砂图滤镜处理成黑色磨砂图滤镜
            let minimumComponentFilter = CIFilter(name: "CIMinimumComponent")!
            minimumComponentFilter.setValue(darkScratchesFilter.outputImage, forKey: kCIInputImageKey)
            // 7.最终组合在一起
            let multiplyCompositingFilter = CIFilter(name: "CIMultiplyCompositing")!
            multiplyCompositingFilter.setValue(minimumComponentFilter.outputImage, forKey: kCIInputBackgroundImageKey)
            multiplyCompositingFilter.setValue(sourceOverCompositingFilter.outputImage, forKey: kCIInputImageKey)
            // 8.最后输出
            let outputImage = multiplyCompositingFilter.outputImage!
            let cgImage = context.createCGImage(outputImage, from: outputImage.extent)
            imageView.image = UIImage(cgImage: cgImage!)
            
        }
    

    结束语

    看完这一节,对高斯模糊,老电影高级用法有了更深的认识,希望能够帮助到你。
    此代码已经上传到githup[DDGScreenShot](https://github.com/dudongge/DDGScreenShot)
    [link](https://github.com/dudongge/DDGScreenShot)
    当然这只是这个库的功能的一小部分
    想看更多功能,可以去github上下载,如果对您有帮助,希望您不吝给个star.
    

    欢迎查看DDGScreenShot

    其余功能如下

    1. (一)DDGScreenShot — 复杂屏幕截屏(如view ScrollView webView wkwebView)
    2. (二)DDGScreenShot--iOS 图片处理--多图片拼接
    3. (三)DDGScreenShot--iOS 图片裁剪,切圆角,加边框,你还用cornerRadius,还有更高级的用法
    4. (四)DDGScreenShot—图片擦除功能
    5. (五)DDGScreenShot—截取图片的任意部分
    6. (六)DDGScreenShot —图片加各种滤镜高逼格操作
  • 相关阅读:
    HDU5873
    HDU5874
    HDU1565(状态压缩dp)
    POJ2774(二分+哈希)
    HDU4474
    HDU2602(背包)
    单链表
    POJ2503(hash)
    POJ1200(hash)
    顺序表
  • 原文地址:https://www.cnblogs.com/dudongge/p/9013630.html
Copyright © 2020-2023  润新知