主要代码如下：

package chapter6;

import java.awt.*;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;

/**

• Created by LENOVO on 18-2-1.

  */
  public class Histogram extends AbstractBufferedImageOp {

  public BufferedImage filter(BufferedImage src,BufferedImage dest){

  int[] histogram = new int[256];
  int width = src.getWidth();
  int height = src.getHeight();
  if(dest == null){
  dest = creatCompatibleDestImage(src,null);
  }
  int[] inPixels = new int[width*height];
  getRGB(src,0,0,width,height,inPixels);

  //获取直方图数据 for(int i=0;i
        
         > 16) & 0xff;         histogram[tr] ++;     } } double maxFrequency = 0;//计算像素出现的最大频率值 for(int i=0;i
        

  }

}

测试代码同上