JAVA 比较两张图片的相似度的代码详解编程语言

import java.awt.image.BufferedImage; 
import java.io.File; 
import javax.imageio.ImageIO; 
 
/** 
 * 比较两张图片的相似度 
 * @author Guihua 
 * 
 */ 
public class BMPLoader { 
	// 改变成二进制码 
	public static String[][] getPX(String args) { 
		int[] rgb = new int[3]; 
 
		File file = new File(args); 
		BufferedImage bi = null; 
		try { 
			bi = ImageIO.read(file); 
		} catch (Exception e) { 
			e.printStackTrace(); 
		} 
 
		int width = bi.getWidth(); 
		int height = bi.getHeight(); 
		int minx = bi.getMinX(); 
		int miny = bi.getMinY(); 
		String[][] list = new String[width][height]; 
		for (int i = minx; i < width; i++) { 
			for (int j = miny; j < height; j++) { 
				int pixel = bi.getRGB(i, j); 
				rgb[0] = (pixel & 0xff0000) >> 16; 
				rgb[1] = (pixel & 0xff00) >> 8; 
				rgb[2] = (pixel & 0xff); 
				list[i][j] = rgb[0] + "," + rgb[1] + "," + rgb[2]; 
 
			} 
		} 
		return list; 
 
	} 
	 
	public static void compareImage(String imgPath1, String imgPath2){ 
		String[] images = {imgPath1, imgPath2}; 
		if (images.length == 0) { 
			System.out.println("Usage >java BMPLoader ImageFile.bmp"); 
			System.exit(0); 
		} 
 
		// 分析图片相似度 begin 
		String[][] list1 = getPX(images[0]); 
		String[][] list2 = getPX(images[1]); 
		int xiangsi = 0; 
		int busi = 0; 
		int i = 0, j = 0; 
		for (String[] strings : list1) { 
			if ((i + 1) == list1.length) { 
				continue; 
			} 
			for (int m=0; m<strings.length; m++) { 
				try { 
					String[] value1 = list1[i][j].toString().split(","); 
					String[] value2 = list2[i][j].toString().split(","); 
					int k = 0; 
					for (int n=0; n<value2.length; n++) { 
						if (Math.abs(Integer.parseInt(value1[k]) - Integer.parseInt(value2[k])) < 5) { 
							xiangsi++; 
						} else { 
							busi++; 
						} 
					} 
				} catch (RuntimeException e) { 
					continue; 
				} 
				j++; 
			} 
			i++; 
		} 
 
		list1 = getPX(images[1]); 
		list2 = getPX(images[0]); 
		i = 0; 
		j = 0; 
		for (String[] strings : list1) { 
			if ((i + 1) == list1.length) { 
				continue; 
			} 
			for (int m=0; m<strings.length; m++) { 
				try { 
					String[] value1 = list1[i][j].toString().split(","); 
					String[] value2 = list2[i][j].toString().split(","); 
					int k = 0; 
					for (int n=0; n<value2.length; n++) { 
						if (Math.abs(Integer.parseInt(value1[k]) - Integer.parseInt(value2[k])) < 5) { 
							xiangsi++; 
						} else { 
							busi++; 
						} 
					} 
				} catch (RuntimeException e) { 
					continue; 
				} 
				j++; 
			} 
			i++; 
		} 
		String baifen = ""; 
		try { 
			baifen = ((Double.parseDouble(xiangsi + "") / Double.parseDouble((busi + xiangsi) + "")) + ""); 
			baifen = baifen.substring(baifen.indexOf(".") + 1, baifen.indexOf(".") + 3); 
		} catch (Exception e) { 
			baifen = "0"; 
		} 
		if (baifen.length() <= 0) { 
			baifen = "0"; 
		} 
		if(busi == 0){ 
			baifen="100"; 
		} 
 
		System.out.println("相似像素数量：" + xiangsi + " 不相似像素数量：" + busi + " 相似率：" + Integer.parseInt(baifen) + "%"); 
 
	} 
 
	public static void main(String[] args){ 
		BMPLoader.compareImage("E://12.bmp", "E://1.bmp"); 
	} 
}