java图片提取文字（java 获取图片格式）
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本篇文章给大家谈谈java图片提取文字，以及java 获取图片格式对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
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本文目录一览：
- 1、java 实现图片的文字识别
- 2、java图像界面如何获取上一个页面文本框的内容？
- 3、用java怎么获得一张图片上的一个文字的坐标点 求高手解答
- 4、java 如何读取附加到图片上的文字
- 5、java中导入一个图片,然后在图片上加上几个文字再输出保存,应该如何用代码实现?
java 实现图片的文字识别
摘要图像识别是目前很热门的研究领域，涉及的知识很广，包括信息论、模式识别、模糊数学、图像编码、内容分类等等。本文仅对使用Java实现了一个简单的图像文本二值处理，关于识别并未实现。
步骤
建立文本字符模板二值矩阵
对测试字符进行二值矩阵化处理
代码
/*
* @(#)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 copy 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.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 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 copy 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.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 codeimage .* @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;
}
资源来自：
java图像界面如何获取上一个页面文本框的内容？
1.如果你用的servlet的话，可以用request.getParameter("name")；这样获取jsp页面中表单name="name"值的数据
2.如果用的struts2的话，必须在Action中写相应的get,set方法，
比如：jsp页面中有个name值等于“name”,那么相应的Action中要有相应的name属性的set和get方法
用java怎么获得一张图片上的一个文字的坐标点 求高手解答
//提示：坐标依次打印在命令符窗口
//提示：坐标依次打印在命令符窗口
//提示：坐标依次打印在命令符窗口
//不就是监听鼠标事件吗？
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.Border;
/**
*我想建立个界面，可以加载本机中图片。
*加载后可以通过鼠标点击获得图片上任意点坐标。
*提问者： sunny929929 - 试用期 一级
*/
public class MyPicture extends JFrame implements MouseListener{
private JLabel tipLabel;
/**
*main()
*/
public static void main(String[] args){
MyPicture frame = new MyPicture();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
/**
*constructor
*/
public MyPicture(){
setSize(800, 600);//根据要求调整大小
setLocation(100,100);
setTitle("获得图片上任意点坐标");
setResizable(false);
Container con=getContentPane();
ImageIcon bgIcon=new ImageIcon("bgpic.jpg");//注意图片的路径
ImagePanel backpicPanel=new ImagePanel(bgIcon);
backpicPanel.addMouseListener(this);
con.add(backpicPanel,BorderLayout.CENTER);
tipLabel=new JLabel("--------------------提示：坐标依次打印在屏幕上!--------------------");
con.add(tipLabel,BorderLayout.SOUTH);
}
/**
*
*/
public void mousePressed(MouseEvent e){
int x=e.getX();
int y=e.getY();
String message="("+x+","+y+")";
tipLabel.setText(message);
System.out.println(message);
}
public void mouseReleased(MouseEvent e){
}
public void mouseEntered(MouseEvent e){
}
public void mouseExited(MouseEvent e){
}
public void mouseClicked(MouseEvent e){
}
}
/**
*类ImagePanel，用于添加背景图片
*/
class ImagePanel extends JPanel{
private Image img;
public ImagePanel (ImageIcon imageIcon){
img=imageIcon.getImage();
}
public void paintComponent(Graphics g){
super.paintComponent(g);
g.drawImage(img,0,0,this);
}
}
java 如何读取附加到图片上的文字
图片上的文字是没法读取的，以为这涉及到图像处理。非常非常复杂！因为如果你非要读取图片上的文字，不是几行代码可以搞定的，首相从matlaB开始学，了解什么是图像处理。然后再开发相应的jar包。当然，你也可以使用相关的软件工具，比如识图软件，通过读取软件的反馈也算是读取了图片上的文字
java中导入一个图片,然后在图片上加上几个文字再输出保存,应该如何用代码实现?
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class Test{
public static void main(String[] args){
try {
File f1 = new File("a.jpg");
BufferedImage image = ImageIO.read(f1);
Graphics g = image.getGraphics();
g.setFont(new Font("Serif",Font.BOLD,20));
g.setColor(Color.red);
g.drawString("happy new year!", 10, 20);
File f2 = new File("copy.jpg");
ImageIO.write(image, "JPEG", f2);
} catch (IOException e) {
e.printStackTrace();
}
}
}
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