Image src = javax.imageio.ImageIO.read(_file); // 构造Image对象
double wideth = (double) src.getWidth(null); // 得到源图宽
double height = (double) src.getHeight(null); // 得到源图长
System.out.println("源图宽:"+wideth);
System.out.println("源图长:"+height);
/*//缩放处理
int iWideth = (int) (wideth * ins);
int iHeight = (int) (height * ins);
*/
int iWideth = 300;
int iHeight = 200;
System.out.println("现图宽:"+iWideth);
System.out.println("现图长:"+iHeight);
System.out.println("缩放参数:"+ins);
BufferedImage tag = null;
try{
tag = new BufferedImage(iWideth, iHeight,BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src, 0, 0, null);
//int x = (int) (src.getWidth(null) / iWideth);
//int y = (int) (src.getHeight(null) / iHeight);
tag.getSubimage(500, 600, 300, 200);
/*//打水印
File _filebiao = new File("test2.jpg");
Image src_biao = ImageIO.read(_filebiao);
int wideth_biao = 40;//src_biao.getWidth(null);
int height_biao = 40;//src_biao.getHeight(null);
tag.getGraphics().drawImage(src_biao,50,50,wideth_biao,height_biao,null);
*/
}catch(Exception e){e.printStackTrace();}我想要拿到一张图,在这个图上找到一个x,y坐标点,然后以这个点延伸一定区域,把这范围的图截下来,谁来帮帮我
double wideth = (double) src.getWidth(null); // 得到源图宽
double height = (double) src.getHeight(null); // 得到源图长
System.out.println("源图宽:"+wideth);
System.out.println("源图长:"+height);
/*//缩放处理
int iWideth = (int) (wideth * ins);
int iHeight = (int) (height * ins);
*/
int iWideth = 300;
int iHeight = 200;
System.out.println("现图宽:"+iWideth);
System.out.println("现图长:"+iHeight);
System.out.println("缩放参数:"+ins);
BufferedImage tag = null;
try{
tag = new BufferedImage(iWideth, iHeight,BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src, 0, 0, null);
//int x = (int) (src.getWidth(null) / iWideth);
//int y = (int) (src.getHeight(null) / iHeight);
tag.getSubimage(500, 600, 300, 200);
/*//打水印
File _filebiao = new File("test2.jpg");
Image src_biao = ImageIO.read(_filebiao);
int wideth_biao = 40;//src_biao.getWidth(null);
int height_biao = 40;//src_biao.getHeight(null);
tag.getGraphics().drawImage(src_biao,50,50,wideth_biao,height_biao,null);
*/
}catch(Exception e){e.printStackTrace();}我想要拿到一张图,在这个图上找到一个x,y坐标点,然后以这个点延伸一定区域,把这范围的图截下来,谁来帮帮我
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;import javax.imageio.ImageIO;/*******************************************************************
* 该JavaBean可以直接在其他Java应用程序中调用,实现屏幕的"拍照"
* This JavaBean is used to snapshot the GUI in a
* Java application! You can embeded
* it in to your java application source code, and us
* it to snapshot the right GUI of the application
* @see javax.ImageIO
* @author liluqun ([email protected])
* @version 1.0
* http://community.csdn.net/Expert/topic/4844/4844995.xml?temp=.2917292
*****************************************************/public class Test
{
private String fileName; //文件的前缀
private String defaultName = "GuiCamera";
static int serialNum=0;
private String imageFormat; //图像文件的格式
private String defaultImageFormat="png";
Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); /****************************************************************
* 默认的文件前缀为GuiCamera,文件格式为PNG格式
* The default construct will use the default
* Image file surname "GuiCamera",
* and default image format "png"
****************************************************************/
public Test() {
fileName = defaultName;
imageFormat=defaultImageFormat; } /****************************************************************
* @param s the surname of the snapshot file
* @param format the format of the image file,
* it can be "jpg" or "png"
* 本构造支持JPG和PNG文件的存储
****************************************************************/
public Test(String s,String format) { fileName = s;
imageFormat=format;
} /****************************************************************
* 对屏幕进行拍照
* snapShot the Gui once
****************************************************************/
public void snapShot() { try {
//拷贝屏幕到一个BufferedImage对象screenshot
BufferedImage screenshot = (new Robot()).createScreenCapture(new
Rectangle(0, 0, (int) d.getWidth(), (int) d.getHeight()));
serialNum++;
//根据文件前缀变量和文件格式变量,自动生成文件名
String name=fileName+String.valueOf(serialNum)+"."+imageFormat;
File f = new File(name);
System.out.print("Save File "+name);
//将screenshot对象写入图像文件
ImageIO.write(screenshot, imageFormat, f);
System.out.print("..Finished!\n");
}
catch (Exception ex) {
System.out.println(ex);
}
} public static void main(String[] args)
{
Test cam= new Test("d:\\Hello", "png");// cam.snapShot();
}
}