how to use magic wand tool
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how to change the colour of particular pixel and pixel area covered with the same colour.I am able to get the particular pixel colour using below swift code but I am not able to get surrounding area which has same colour pixel and unable to change it.
import UIKit
class ColorOfImage: UIImageView {
var lastColor:UIColor? = nil /\* // Only override draw() if you perform custom drawing. // An empty implementation adversely affects performance during animation. override func draw(\_ rect: CGRect) { // Drawing code } \*/ override func touchesEnded(\_ touches: Set, with event: UIEvent?) { if self.isHidden == true { self.next?.touchesEnded(touches, with: event) return } let touch: UITouch = touches.first! var point:CGPoint = touch.location(in: self) self.lastColor = self.getPixelColorAtLocation(point:point) } public func createARGBBitmapContext(inImage: CGImage) -> CGContext { var bitmapByteCount = 0 var bitmapBytesPerRow = 0 //Get image width, height let pixelsWide = inImage.width let pixelsHigh = inImage.height // Declare the number of bytes per row. Each pixel in the bitmap in this // example is represented by 4 bytes; 8 bits each of red, green, blue, and // alpha. bitmapBytesPerRow = Int(pixelsWide) \* 4 bitmapByteCount = bitmapBytesPerRow \* Int(pixelsHigh) // Use the generic RGB color space. let colorSpace = CGColorSpaceCreateDeviceRGB() // Allocate memory for image data. This is the destination in memory // where any drawing to the bitmap context will be rendered. let bitmapData = malloc(bitmapByteCount) // Create the bitmap context. We want pre-multiplied ARGB, 8-bits // per component. Regardless of what the source image format is // (CMYK, Grayscale, and so on) it will be converted over to the format // specified here by CGBitmapContextCreate. let context = CGContext(data: bitmapData, width: pixelsWide, height: pixelsHigh, bitsPerComponent: 8, bytesPerRow: bitmapBytesPerRow, space: colorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedFirst.rawValue) // Make sure and release colorspace before returning r -
how to change the colour of particular pixel and pixel area covered with the same colour.I am able to get the particular pixel colour using below swift code but I am not able to get surrounding area which has same colour pixel and unable to change it.
import UIKit
class ColorOfImage: UIImageView {
var lastColor:UIColor? = nil /\* // Only override draw() if you perform custom drawing. // An empty implementation adversely affects performance during animation. override func draw(\_ rect: CGRect) { // Drawing code } \*/ override func touchesEnded(\_ touches: Set, with event: UIEvent?) { if self.isHidden == true { self.next?.touchesEnded(touches, with: event) return } let touch: UITouch = touches.first! var point:CGPoint = touch.location(in: self) self.lastColor = self.getPixelColorAtLocation(point:point) } public func createARGBBitmapContext(inImage: CGImage) -> CGContext { var bitmapByteCount = 0 var bitmapBytesPerRow = 0 //Get image width, height let pixelsWide = inImage.width let pixelsHigh = inImage.height // Declare the number of bytes per row. Each pixel in the bitmap in this // example is represented by 4 bytes; 8 bits each of red, green, blue, and // alpha. bitmapBytesPerRow = Int(pixelsWide) \* 4 bitmapByteCount = bitmapBytesPerRow \* Int(pixelsHigh) // Use the generic RGB color space. let colorSpace = CGColorSpaceCreateDeviceRGB() // Allocate memory for image data. This is the destination in memory // where any drawing to the bitmap context will be rendered. let bitmapData = malloc(bitmapByteCount) // Create the bitmap context. We want pre-multiplied ARGB, 8-bits // per component. Regardless of what the source image format is // (CMYK, Grayscale, and so on) it will be converted over to the format // specified here by CGBitmapContextCreate. let context = CGContext(data: bitmapData, width: pixelsWide, height: pixelsHigh, bitsPerComponent: 8, bytesPerRow: bitmapBytesPerRow, space: colorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedFirst.rawValue) // Make sure and release colorspace before returning r -
how to change the colour of particular pixel and pixel area covered with the same colour.I am able to get the particular pixel colour using below swift code but I am not able to get surrounding area which has same colour pixel and unable to change it.
import UIKit
class ColorOfImage: UIImageView {
var lastColor:UIColor? = nil /\* // Only override draw() if you perform custom drawing. // An empty implementation adversely affects performance during animation. override func draw(\_ rect: CGRect) { // Drawing code } \*/ override func touchesEnded(\_ touches: Set, with event: UIEvent?) { if self.isHidden == true { self.next?.touchesEnded(touches, with: event) return } let touch: UITouch = touches.first! var point:CGPoint = touch.location(in: self) self.lastColor = self.getPixelColorAtLocation(point:point) } public func createARGBBitmapContext(inImage: CGImage) -> CGContext { var bitmapByteCount = 0 var bitmapBytesPerRow = 0 //Get image width, height let pixelsWide = inImage.width let pixelsHigh = inImage.height // Declare the number of bytes per row. Each pixel in the bitmap in this // example is represented by 4 bytes; 8 bits each of red, green, blue, and // alpha. bitmapBytesPerRow = Int(pixelsWide) \* 4 bitmapByteCount = bitmapBytesPerRow \* Int(pixelsHigh) // Use the generic RGB color space. let colorSpace = CGColorSpaceCreateDeviceRGB() // Allocate memory for image data. This is the destination in memory // where any drawing to the bitmap context will be rendered. let bitmapData = malloc(bitmapByteCount) // Create the bitmap context. We want pre-multiplied ARGB, 8-bits // per component. Regardless of what the source image format is // (CMYK, Grayscale, and so on) it will be converted over to the format // specified here by CGBitmapContextCreate. let context = CGContext(data: bitmapData, width: pixelsWide, height: pixelsHigh, bitsPerComponent: 8, bytesPerRow: bitmapBytesPerRow, space: colorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedFirst.rawValue) // Make sure and release colorspace before returning rI am not an expert in this field But if you find the solution, I am interested