⑴ 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(".jpg");
ImageIO.write(image, "JPEG", f2);
} catch (IOException e) {
e.printStackTrace();
}
}
}
⑵ 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？
importjavax.swing.*;
importjava.awt.*;
importjava.awt.event.*;
importjavax.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
*/
{
privateJLabeltipLabel;
/**
*main()
*/
publicstaticvoidmain(String[]args){
MyPictureframe=newMyPicture();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
/**
*constructor
*/
publicMyPicture(){
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);
Containercon=getContentPane();
ImageIconbgIcon=newImageIcon("bgpic.jpg");//注意图片的路径
ImagePanelbackpicPanel=newImagePanel(bgIcon);
backpicPanel.addMouseListener(this);
con.add(backpicPanel,BorderLayout.CENTER);
tipLabel=newJLabel("--------------------提示：坐标依次打印在屏幕上!--------------------");
con.add(tipLabel,BorderLayout.SOUTH);
}
/**
*
*/
publicvoidmousePressed(MouseEvente){
intx=e.getX();
inty=e.getY();
Stringmessage="("+x+","+y+")";
tipLabel.setText(message);
System.out.println(message);
}
publicvoidmouseReleased(MouseEvente){
}
publicvoidmouseEntered(MouseEvente){
}
publicvoidmouseExited(MouseEvente){
}
publicvoidmouseClicked(MouseEvente){
}
}
/**
*类ImagePanel，用于添加背景图片
*/
classImagePanelextendsJPanel{
privateImageimg;
publicImagePanel(ImageIconimageIcon){
img=imageIcon.getImage();
}
publicvoidpaintComponent(Graphicsg){
super.paintComponent(g);
g.drawImage(img,0,0,this);
}
}
⑶ 怎么用java从文件中读取图片和写入图片到文件里
楼下的答案有所欠缺，我这里有个比较完整的，也很简洁的方法，大家参考下import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import javax.imageio.ImageIO;
import java.io.*;public class image {
public static void main(String []args)throws IOException{
Image[] array = new Image[10];
Image image = ImageIO.read(new File("c:\\supermaket1.jpg"));//这里是你要读取的图像文件
array[0] = image;
ImageIO.write((RenderedImage) image, "png", new File("f:\\test.txt"));//这里是你要写入的文件，如果不存在这个文件，那么系统会自动创建它
}
⑷ java生成jpg图片 并且实现文字和图片混排
response.setHeader("Cache-Control","no-cache");
String str="";
String sum="";
for(int i=0;i<4;i++){
Random random=new Random();
int j=Math.round(random.nextFloat()*35);
char x=str.charAt(j);
sum+=x+"";
}
request.getSession().setAttribute("Code",sum);
BufferedImage bufferedImage=new BufferedImage(50,20,BufferedImage.TYPE_3BYTE_BGR);
Graphics2D graphics2D=(Graphics2D)bufferedImage.getGraphics();
graphics2D.setColor(Color.blue);
graphics2D.fill3DRect(0,0,50,20,false);
graphics2D.setColor(Color.YELLOW);
graphics2D.drawString(sum,10,12);
response.setContentType("image/jpeg");
ServletOutputStream output;
try {
output = response.getOutputStream();
JPEGImageEncoder encoder= JPEGCodec.createJPEGEncoder(output);
encoder.encode(bufferedImage);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
⑸ Java如何实现从一个指定图片中提取出内容！例如图片中的完整车牌！
java本身无法实现。估计要调用第三方程序。
⑹ java有读取图片里面文字的方法吗
使用tesseract-ocr，可以识别简单的验证码，中文没尝试过
⑺ 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 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;
}
资源来自：
http://blog.csdn.net/chief1985/article/details/2229572
⑻ 用Java读取一张图片，并识别图中的所有汉字，怎么解决
这个要是自己去写,估计很难,需要用到很多AI智能的算法,可以调用谷歌或者网络的识图API
⑼ 用JAVA编写一个程序识别图片上的文字；这个难题你实现了吗
这种不是个人可以处理的，也不是java的强项，去找提供ocr api的厂商吧。