java pixel image processing

Question

Java application for Android. There is the following piece of xml:

<TableRow> <ImageView android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_margin = "10dp" android: src = "@ drawable / icon_security" /> <TextView android: layout_width = "wrap_content" android: layout_height = "wrap_content" style = "@ style / DesignerTextStyle2" android: layout_gravity = "center_vertical" android: text = "@ string / welcome_security_calls" /> </ TableRow>

I need to compare pixel image processing of the certain image on the screen (e.g. it is third image on the screen) with the famous image (i.e. this image - "@ drawable / icon_security").

Can you show me an example for solving this problem?

Comparing equality or similarity? Could you be more specific? — runDOSrun
– runDOSrun, Commented Jul 29, 2015 at 11:36

OBX · Accepted Answer · 2015-07-29 09:25:21Z

This is the Java code that I use to compare two images using pixel values from URL

package imager; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; import java.io.IOException; import java.net.URL; public class Imagecompare { public static void main(String args[]) { String s1; BufferedImage img1 = null; BufferedImage img2 = null; try { URL url1 = new URL("http://www.lac.inpe.br/JIPCookbook/Resources/ImageSimilarity/d02.jpg"); URL url2 = new URL("http://www.lac.inpe.br/JIPCookbook/Resources/ImageSimilarity/s02.jpg"); img1 = ImageIO.read(url1); img2 = ImageIO.read(url2); } catch (IOException e) { e.printStackTrace(); } int width1 = img1.getWidth(null); int width2 = img2.getWidth(null); int height1 = img1.getHeight(null); int height2 = img2.getHeight(null); if ((width1 != width2) || (height1 != height2)) { System.err.println("Error: Images dimensions mismatch"); System.exit(1); } long diff = 0; for (int y = 0; y < height1; y++) { for (int x = 0; x < width1; x++) { int rgb1 = img1.getRGB(x, y); int rgb2 = img2.getRGB(x, y); int r1 = (rgb1 >> 16) & 0xff; int g1 = (rgb1 >> 8) & 0xff; int b1 = (rgb1 ) & 0xff; int r2 = (rgb2 >> 16) & 0xff; int g2 = (rgb2 >> 8) & 0xff; int b2 = (rgb2 ) & 0xff; diff += Math.abs(r1 - r2); diff += Math.abs(g1 - g2); diff += Math.abs(b1 - b2); } } double n = width1 * height1 * 3; double p = diff / n / 255.0; double percnt = 100.0-(p*100.0); System.out.println("PERCENT: " +percnt); } }

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