SummaryImage recognition is a very popular research field, involving a wide range of knowledge, including information theory, pattern recognition, fuzzy mathematics, Image coding, content classification and so on. This article only uses Java to implement a simple image text binary processing, on the recognition is not implemented.
Steps
Create a text character template two value matrix
two-valued matrix processing of test characters
Code/*
* @ (#) Stdmodelrepository.java
*
* This are free software; You can redistribute it and/or modify
* It under the terms of the GNU general public License as published by
* the free Software Foundation; Either version 3 of the License, or
* (at your option) any later version.
*
* This are distributed in the hope that it'll be useful,
* but without any WARRANTY; Without even the implied warranty of
* merchantability or FITNESS for A particular purpose. The
* GNU Library general public License for more details.
* You should have received a copy of the GNU general public License
* Along with this program; If not, write to the free Software
* Foundation, Inc., Temple Place-suite, Boston, MA 02111-1307, USA.
*/
Package cn.edu.ynu.sei.recognition.util;
Import Java.awt.Image;
Import Java.awt.image.BufferedImage;
Import Java.io.File;
Import java.io.IOException;
Import java.util.ArrayList;
Import java.util.List;
Import Java.util.logging.Level;
Import Java.util.logging.Logger;
Import Javax.imageio.ImageIO;
/**
* Hold character Charimgs as standard Model repository.
* @author 88250
* @version 1.0.0.0, Mar 20, 2008
*/
public class Stdmodelrepository {
/**
* Hold character images
*/
List < bufferedimage > Charimgs = new ArrayList < BufferedImage > ();
/**
* Default width of a character
*/
static int width = 16;
/**
* Default height of a character
*/
static int height = 28;
/**
* Standard character Model matrix
*/
public int [][][] Stdcharmatrix = new int [][width][height];
/**
* Default constructor.
*/
Public Stdmodelrepository () {
BufferedImage lowercase = null;
try {
lowercase = imageio.read (new File ("Lowercase.png"));
catch (IOException ex) {
Logger.getlogger (Stdmodelrepository. class. GetName ()).
Log (Level.severe, NULL, ex);
}
for (int i = 0; i < i + +) {
Charimgs.add (Lowercase.getsubimage (i * width),
0,
Width
height));
}
for (int i = 0; i < charimgs.size (); i + +) {
Image image = Charimgs.get (i);
int [] pixels = imageutils.getpixels (image,
Image.getwidth (NULL),
Image.getheight (null));
Stdcharmatrix[i] = Imageutils.getsymbolmatrix (pixels, 0). Clone ();
Imageutils.displaymatrix (Stdcharmatrix[i]);
}
}
}
/*
* @ (#) Imageutils.java
*
* This are free software; You can redistribute it and/or modify
* It under the terms of the GNU general public License as published by
* the free Software Foundation; Either version 3 of the License, or
* (at your option) any later version.
*
* This are distributed in the hope that it'll be useful,
* but without any WARRANTY; Without even the implied warranty of
* merchantability or FITNESS for A particular purpose. The
* GNU Library general public License for more details.
* You should have received a copy of the GNU general public License
* Along with this program; If not, write to the free Software
* Foundation, Inc., Temple Place-suite, Boston, MA 02111-1307, USA.
*/
Package cn.edu.ynu.sei.recognition.util;
Import Java.awt.Image;
Import Java.awt.image.PixelGrabber;
Import Java.util.logging.Level;
Import Java.util.logging.Logger;
/**
* Mainipulation of image data.
* @author 88250
* @version 1.0.0.3, Mar 20, 2008
*/
public class Imageutils {
/**
* Return all of the pixel values of sepecified <code>image</code>.
* @param image The sepecified image
* @param width width of the <code>image</code>
* @param height of the <code>image</code>
* @return
*/
public static int [] Getpixels (image image, int width, int height) {
int [] pixels = new int [width * height];
try {
New PixelGrabber (image, 0, 0, width, height, pixels, 0, width). grabpixels ();
catch (Interruptedexception ex) {
Logger.getlogger (Imageutils. class. GetName ()).
Log (Level.severe, NULL, ex);
}
return pixels;
}
/**
* Get a matrix that described the <code>pixels</code>.
* <p>
* For example, the result is the matrix like this:
* <center>
* 0000000000000000<br>
* 0000000000000000<br>
* 0001111111110000<br>
* 0011111111111000<br>
* 0011111111111100<br>
* 0011000000011100<br>
* 0000000000011100<br>
* 0000111111111100<br>
* 0011111111111100<br>
* 0011111110011100<br>
* 0111100000011100<br>
* 0111100000011100<br>
* 0111100000111100<br>
* 0111100001111110<br>
* 0011111111111100<br>
* 0011111111111100<br>
* 0001111111111100<br>
* 0000000000000000<br>
* 0000000000000000<br>
* </center>
* It describes the Alphbet ' a '.
* </p>
* @param pixels the pixel array
* @param sparsefactor sparse factor
* @return A matrix that describes a Alphbet
*/
public static int [] Getsymbolmatrix (int [] pixels, int sparsefactor) {
Final int width = stdmodelrepository.width;
Final int height = stdmodelrepository.height;
int [] [] ret = new int [width][height];
for (int i = 0; i < height; i + +) {
for (int j = 0; J < width; j + +) {
if (pixels[i * width + j] = = 1) {
Ret[j][i] = 0;
} else {
Ret[j][i] = 1;
}
}
}
return ret;
}
/**
* Print the <code>matrix</code> under console.
* @param matrix the sepecified matrix data
*/
public static void Displaymatrix (int [] matrix) {
System.out.println ("");
for (int i = 0; I < matrix[0].length i + +) {
for (int j =
