采用直方图原理算法比对图片的细微差别效果比较好,以下两张区别很小的图片识别效果如下:
识别结果:
主要代码如下:
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import javax.imageio.*; import java.awt.image.*; import java.awt.*; import java.io.*; public class PhotoDigest { public static void main(String[] args) throws Exception { float percent = compare(getData( "/Users/sun/Downloads/1.jpg" ), getData( "/Users/sun/Downloads/3.jpg" )); if (percent == 0 ) { System.out.println( "无法比较" ); } else { System.out.println( "两张图片的相似度为:" + percent + "%" ); } } public static int [] getData(String name) { try { BufferedImage img = ImageIO.read( new File(name)); BufferedImage slt = new BufferedImage( 100 , 100 , BufferedImage.TYPE_INT_RGB); slt.getGraphics().drawImage(img, 0 , 0 , 100 , 100 , null ); // ImageIO.write(slt,"jpeg",new File("slt.jpg")); int [] data = new int [ 256 ]; for ( int x = 0 ; x < slt.getWidth(); x++) { for ( int y = 0 ; y < slt.getHeight(); y++) { int rgb = slt.getRGB(x, y); Color myColor = new Color(rgb); int r = myColor.getRed(); int g = myColor.getGreen(); int b = myColor.getBlue(); data[(r + g + b) / 3 ]++; } } // data 就是所谓图形学当中的直方图的概念 return data; } catch (Exception exception) { System.out.println( "有文件没有找到,请检查文件是否存在或路径是否正确" ); return null ; } } public static float compare( int [] s, int [] t) { try { float result = 0F; for ( int i = 0 ; i < 256 ; i++) { int abs = Math.abs(s[i] - t[i]); int max = Math.max(s[i], t[i]); result += ( 1 - (( float ) abs / (max == 0 ? 1 : max))); } return (result / 256 ) * 100 ; } catch (Exception exception) { return 0 ; } } } |
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原文链接:https://blog.csdn.net/qq_24125575/article/details/94458420