⑴ java 如何讀取附加到圖片上的文字

圖片上的文字是沒法抄讀取的，以為這涉及到圖像處理。非常非常復雜！因為如果你非要讀取圖片上的文字，不是幾行代碼可以搞定的，首相從matlaB開始學，了解什麼是圖像處理。然後再開發相應的jar包。當然，你也可以使用相關的軟體工具，比如識圖軟體，通過讀取軟體的反饋也算是讀取了圖片上的文字

⑵ java截圖後怎麼用tesseract 文字識別

網上傳來的代碼示例大多是在Windows下安裝自Tesseract ORC後通過CMD命令操作進行圖識別操作.而 Tess4j 針對Tesseract 提供了JNI支持,同時還提供了一些圖片操作的工具類,提供比如圖片放大,旋轉,黑白處理,銳化 等用來提高識別率的操作.操作十分方便. T

⑶ java 實現圖片的文字識別

摘要圖像識別是目前很熱門的研究領域，涉及的知識很廣，包括資訊理論、模式識別、模糊數學、圖像編碼、內容分類等等。本文僅對使用Java實現了一個簡單的圖像文本二值處理，關於識別並未實現。
步驟
建立文本字元模板二值矩陣
對測試字元進行二值矩陣化處理
代碼
/*
* @(#)StdModelRepository.java
*
* This program is 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
* You should have received a of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package cn.e.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 charImgs = new ArrayList();
/** * 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[27][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 < 26 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 program is 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
* You should have received a of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package cn.e.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< .>* @param image the sepecified image
* @param width width of the image
* @param height height of the image
* @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;
}
資源來自：
http://blog.csdn.net/chief1985/article/details/2229572

⑷ java中如何實現字元的識別

給你一段代碼，看是否看得懂。我自己寫得，可能不好。
/** *
* @param num
* @return<ul>
* 判斷結果:
* <li>true:整數
* <li>false:非整數
*/
public static boolean isInt(String num)
{
try {
Integer.parseInt(num);
} catch (NumberFormatException e) {
e.getMessage();
return false;
}

return true;
}
}

然後在需要的地方調用這個isInt方法就好了。這個是判斷是否可以轉換成數字。
我是這樣調用的
/* 總行數為空的時候*/
if (classTotalLineString == null || classTotalLineString.equals("")
|| !Utils.isInt(classTotalLineString)){
totalLineErrorFlag = true;

2：還可以用正則表達式
判斷是否是整數的正則表達式是："^-?\\d+$"//整數
正整數是這個："^[0-9]*[1-9][0-9]*$"//正整數
在需要的地方if判斷下這個字元就好。