Java将出片处理成老照片特效代码，老照片特效代码,就是黄褐色特效。它的基本

Java将出片处理成老照片特效代码，老照片特效代码,就是黄褐色特效。它的基本

就是黄褐色特效。它的基本处理算法如下：

首先对图像重新计算RGB值，计算公式如下：

int fr= (int)(((double)tr * 0.393) + ((double)tg * 0.769) + ((double)tb * 0.189));  int fg = (int)(((double)tr * 0.349) + ((double)tg * 0.686) + ((double)tb * 0.168));   int fb= (int)(((double)tr * 0.272) + ((double)tg * 0.534) + ((double)tb * 0.131));  

对图像计算出来的新的RGB值根据随机权重与旧值混合。

计算随机权重的代码如下：

private double noise() {      return Math.random()*0.5 + 0.5;  }  

                                混合颜色的代码如下：

private double colorBlend(double scale, double dest, double src) {      return (scale * dest + (1.0 - scale) * src);  }  

                                滤镜完全源代码：

package com.gloomyfish.filter.study;  import java.awt.image.BufferedImage;  public class SepiaToneFilter extends AbstractBufferedImageOp {      @Override      public BufferedImage filter(BufferedImage src, BufferedImage dest) {          int width = src.getWidth();          int height = src.getHeight();          if ( dest == null )              dest = createCompatibleDestImage( src, null );          int[] inPixels = new int[width*height];          int[] outPixels = new int[width*height];          getRGB( src, 0, 0, width, height, inPixels );          int index = 0;          for(int row=0; row<height; row++) {              int ta = 0, tr = 0, tg = 0, tb = 0;              for(int col=0; col<width; col++) {                  index = row * width + col;                  ta = (inPixels[index] >> 24) & 0xff;                  tr = (inPixels[index] >> 16) & 0xff;                  tg = (inPixels[index] >> 8) & 0xff;                  tb = inPixels[index] & 0xff;  //int fr= (int)(((double)tr * 0.393) + ((double)tg * 0.769) + ((double)tb * 0.189));  //int fg = (int)(((double)tr * 0.349) + ((double)tg * 0.686) + ((double)tb * 0.168));   //int fb= (int)(((double)tr * 0.272) + ((double)tg * 0.534) + ((double)tb * 0.131));                  int fr = (int)colorBlend(noise(), (tr * 0.393) + (tg * 0.769) + (tb * 0.189), tr);                  int fg = (int)colorBlend(noise(), (tr * 0.349) + (tg * 0.686) + (tb * 0.168), tg);                  int fb = (int)colorBlend(noise(), (tr * 0.272) + (tg * 0.534) + (tb * 0.131), tb);                  outPixels[index] = (ta << 24) | (clamp(fr) << 16) | (clamp(fg) << 8) | clamp(fb);              }          }          setRGB( dest, 0, 0, width, height, outPixels );          return dest;      }      private double noise() {          return Math.random()*0.5 + 0.5;      }      private double colorBlend(double scale, double dest, double src) {          return (scale * dest + (1.0 - scale) * src);      }      public static int clamp(int c)      {          return c > 255 ? 255 :( (c < 0) ? 0: c);      }      public String toString()      {          return "Sepia Tone Effect - Effect from Photoshop App";      }  }