RGB像素到UIImage迅速4

Question

问题1：我有从图像中获取的RGB值，并且想要将此RGB值重新转换为UIImage。有人帮助我，请坚持。我在这里发布我的代码。 问题2：还建议我写有关RGB到HSV，HSV到RGB的任何文章。最基本的问题是hmmm，为什么我们要获取RGB，HSV，修改RGB，HSV值并再次转换为图像。

代码部分：它是我的代码，我还显示了我的代码的输出。 我正在使用Xcode 9.4.1 语言是Swift 4.1 [其输出] [1]：https://i.stack.imgur.com/2BTSP.png [将其转换为rgb的图片] [1]：https://i.stack.imgur.com/GEoii.png

   `import UIKit

        public struct PixelData {
            var a: CGFloat = 0
            var r: CGFloat = 0
            var g: CGFloat = 0
            var b: CGFloat = 0
        }

        class ViewController: UIViewController{

            @IBOutlet weak var myImagView: UIImageView!
            var myConvertImage : UIImage!
            var pixelArray : [PixelData] = []

                override func viewDidLoad() {
                super.viewDidLoad()

                var color : RGBColorSpace!
                var pixelDataObj = PixelData()
                let image : UIImage = UIImage(named:"img50")!

                let hight = image.cgImage?.height
                let width = image.cgImage?.width


                    for xx in 1...hight! {
                    for yy in 1...width! {

                        let point = CGPoint(x: xx, y: yy)
                        color = image.getPixelColor(pos: point)

                        pixelDataObj.r = color.red
                        pixelDataObj.g = color.green
                        pixelDataObj.b = color.blue
                        pixelDataObj.a = color.alpha

                        pixelArray.append(pixelDataObj)
                    }
                }

                print("pixelArray.count is \(pixelArray.count)")
                myConvertImage =  imageFromARGB32Bitmap(pixels: pixelArray, width: width!, height: hight!)

                if myConvertImage != nil {
                    let img = myConvertImage!
                    myImagView.image = img
                }else {print("no image")}
            }

            func imageFromARGB32Bitmap(pixels: [PixelData], width: Int, height: Int) -> UIImage? {
                guard width > 0 && height > 0 else { return nil }

                print("width*height is = \(width*height)")
              //  guard pixels.count == width * height else { return nil }

                let rgbColorSpace = CGColorSpaceCreateDeviceRGB()

                let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedFirst.rawValue)

                let bitsPerComponent = 8
                let bitsPerPixel = 32

                var data = pixels // Copy to mutable []
                guard let providerRef = CGDataProvider(data: NSData(bytes: &data,
                                                                    length: data.count * MemoryLayout<PixelData>.size)
                    )
                    else { return nil }

                guard let cgim = CGImage(
                    width: width,
                    height: height,
                    bitsPerComponent: bitsPerComponent,
                    bitsPerPixel: bitsPerPixel,
                    bytesPerRow: width * MemoryLayout<PixelData>.size,
                    space: rgbColorSpace,
                    bitmapInfo: bitmapInfo,
                    provider: providerRef,
                    decode: nil,
                    shouldInterpolate: true,
                    intent: .defaultIntent
         [enter image description here][1]           )
                    else { return nil }
                return UIImage(cgImage: cgim)
            }
        }

        extension UIImage {

            func getPixelColor(pos: CGPoint) -> RGBColorSpace {

                guard let cgImage = cgImage, let pixelData = cgImage.dataProvider?.data else { return RGBColorSpace(red: 0,green: 0,blue: 0,alpha: 0)}

                let data: UnsafePointer<UInt8> = CFDataGetBytePtr(pixelData)
                let bytesPerPixel = cgImage.bitsPerPixel / 8


                // adjust the pixels to constrain to be within the width/height of the image
                let y = pos.y > 0 ? pos.y - 1 : 0
                let x = pos.x > 0 ? pos.x - 1 : 0
                let pixelInfo = ((Int(self.size.width) * Int(y)) + Int(x)) * bytesPerPixel

                let r = CGFloat(data[pixelInfo]) / CGFloat(255.0)
                let g = CGFloat(data[pixelInfo+1]) / CGFloat(255.0)
                let b = CGFloat(data[pixelInfo+2]) / CGFloat(255.0)
                let a = CGFloat(data[pixelInfo+3]) / CGFloat(255.0)

                return RGBColorSpace(red: r, green: g, blue: b, alpha: a)
            }
        }

        struct RGBColorSpace {
            var red : CGFloat
            var green : CGFloat
            var blue : CGFloat
            var alpha : CGFloat

        }`