if let url = URL(string: "https://via.placeholder.com/300x180/62abe4/ffffff?text=Core+Image"), let image = CIImage(contentsOf: url) {
    
    // 原图
    coreImageViews[0].image = UIImage(ciImage: image)
    
    // 高斯模糊滤镜
    coreImageViews[1].image = UIImage(ciImage: image.blurred(radius: 2))
    
    // 颜色生成滤镜
    let color = UIColor.orange.withAlphaComponent(0.4)
    coreImageViews[2].image = UIImage(ciImage: image.generated(color: color))
    
    // 图像覆盖合成滤镜（自己实现）
    coreImageViews[3].image = UIImage(ciImage: image.generated(color: color).compositeSource(over: image))
    
    // 图像覆盖合成滤镜（系统自带）
    coreImageViews[4].image = UIImage(ciImage: image.generated(color: color).composited(over: image))
    
    // 颜色叠层滤镜
    let yellow = UIColor.yellow.withAlphaComponent(0.4)
    coreImageViews[5].image = UIImage(ciImage: image.overlaid(color: yellow))
}

// 1.高斯模糊滤镜（CIGaussianBlur）
public func blurred(radius: Double) -> CIImage {
    let parameters: [String: Any] = [
        kCIInputRadiusKey: radius,
        kCIInputImageKey: self
    ]
    guard let filter = CIFilter(name: "CIGaussianBlur", parameters: parameters) else {
        fatalError("CIGaussianBlur filter creation failed!")
    }
    guard let outputImage = filter.outputImage else {
        fatalError("CIGaussianBlur outputImage generation failed!")
    }
    return outputImage
}

public func generated(color: UIColor) -> CIImage {
    let parameters: [String: Any] = [
        kCIInputColorKey: CIColor(cgColor: color.cgColor)
    ]
    guard let filter = CIFilter(name: "CIConstantColorGenerator", parameters: parameters) else {
        fatalError("CIConstantColorGenerator filter creation failed!")
    }
    guard let outputImage = filter.outputImage else {
        fatalError("CIConstantColorGenerator outputImage generation failed!")
    }
    return outputImage.cropped(to: extent)
}

// 3.图像覆盖合成滤镜（CISourceOverCompositing）
// iOS8.0开始 <func composited(over dest: CIImage) -> CIImage> 的实现原理
public func compositeSource(over dest: CIImage) -> CIImage {
    let parameters: [String: Any] = [
        kCIInputBackgroundImageKey: dest,
        kCIInputImageKey: self
    ]
    guard let filter = CIFilter(name: "CISourceOverCompositing", parameters: parameters) else {
        fatalError("CISourceOverCompositing filter creation failed!")
    }
    guard let outputImage = filter.outputImage else {
        fatalError("CISourceOverCompositing outputImage generation failed!")
    }
    return outputImage.cropped(to: extent)
}

// 4.颜色叠层滤镜
public func overlaid(color: UIColor) -> CIImage {
    let overlay = generated(color: color)
    return overlay.compositeSource(over: self)
}