[AS3] flash.filter.ColorMatrixFilter(matrix) - matrix變形矩陣改變飽合度(saturation)

變形矩陣示意圖

原圖：將被提升色彩飽合度。

參考此篇處理方式：
UNDERSTANDING AS3 COLORMATRIXFILTER CLASS

991221_ColorMF_saturation.swf  - ↓ 以下 swf 檔色彩飽合度已提升。

package  {
 import flash.display.Sprite;
 import flash.filters.ColorMatrixFilter;
 import flash.display.BitmapData;
 import flash.display.Bitmap;
 import flash.display.DisplayObject;
 //
 public class ColorMF_saturation_991221 extends Sprite{
  public var bmd:BitmapData = new MyPhoto(0,0);
  public var bm:Bitmap = new Bitmap(bmd);
  public function ColorMF_saturation_991221() {
   addChild(bm);
   var matrix:Array = new Array();
   matrix = matrix.concat([2, -1, 0, 0, 0]); //RED Channel
   matrix = matrix.concat([-1, 2, 0, 0, 0]); //GREEN Channel
   matrix = matrix.concat([0, -1, 2, 0, 0]); //BLUE Channel
   matrix = matrix.concat([0, 0, 0, 1, 0]); //ALPHA Channel
   var myFilter:ColorMatrixFilter = new ColorMatrixFilter(matrix);
   bm.filters = [myFilter];
  }

 }
 
}

參考此篇處理方式：Matrix Operations for Image Processing - Paul Haeberli

991221_ColorMF_saturation2.swf

● s = 1 ← 點陣圖為原值




991221_ColorMF_saturation2a.swf

● s = 1.8 或 大於1 ← 點陣圖色彩飽合度增加




991221_ColorMF_saturation2b.swf

● s = 0 ← 點陣圖變成灰階




991221_ColorMF_saturation2c.swf

● s = 0 ← 點陣圖變成互補色

package  {
 import flash.display.Sprite;
 import flash.filters.ColorMatrixFilter;
 import flash.display.BitmapData;
 import flash.display.Bitmap;
 import flash.display.DisplayObject;
 //
 public class ColorMF_saturation2_991221 extends Sprite{
  public var bmd:BitmapData = new MyPhoto(0,0);
  public var bm:Bitmap = new Bitmap(bmd);
  public function ColorMF_saturation2_991221() {
   addChild(bm);
   //
   var rwgt:Number = 0.3086;
   var gwgt:Number = 0.6094;
   var bwgt:Number = 0.0802;
   //
   var s:Number = 1;
   //
   var a:Number = (1.0-s)*rwgt + s;
      var b:Number = (1.0-s)*gwgt;
      var c:Number = (1.0-s)*bwgt;
      var d:Number = (1.0-s)*rwgt;
      var e:Number = (1.0-s)*gwgt + s;
      var f:Number = (1.0-s)*bwgt;
      var g:Number = (1.0-s)*rwgt;
      var h:Number = (1.0-s)*gwgt;
      var i:Number = (1.0-s)*bwgt + s;
   //
   var matrix:Array = new Array();
   matrix = matrix.concat([a, b, c, 0, 0]); //RED Channel
   matrix = matrix.concat([d, e, f, 0, 0]); //GREEN Channel
   matrix = matrix.concat([g, h, i, 0, 0]); //BLUE Channel
   matrix = matrix.concat([0, 0, 0, 1, 0]); //ALPHA Channel
   var myFilter:ColorMatrixFilter = new ColorMatrixFilter(matrix);
   bm.filters = [myFilter];
  }

 }
 
}