1、算法

r = r*128/(g+b +1);

g = g*128/(r+b +1);

b = b*128/(g+r +1);

2、代码实现

public Bitmap render(Bitmap bitmap)  {    if(bitmap == null)return null;    int width = bitmap.getWidth();    int height = bitmap.getHeight();    int[] pixels = new int[width * height];    bitmap.getPixels(pixels ,0 , width , 0 , 0 , width , height);    for(int i=0 ; i
     
      >16;        int g = (pixel & 0x0000ff00)>>8;        int b = (pixel & 0x000000ff);        r = r*128/(g+b +1);        r = colorSafe(r);        g = g*128/(r+b +1);        g = colorSafe(g);        b = b*128/(g+r +1);        b = colorSafe(b);        pixels[i*width +j] = (pixel & 0xff000000) + (r<<16)+ (g<<8) +b;      }    }    return Bitmap.createBitmap(pixels ,width , height , Config.ARGB_8888);  }public int colorSafe(int value){  if(value<0)  {    value = 0;  }  if(value>255)  {    value = 255;  }  return value;}