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 = 500;
int iHeight = 400;
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, iWideth, iHeight, 200, 100, iWideth, iHeight, null);
/*//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();}我想在图片上找到一个坐标点x,y,以这个坐标为中心向四周延伸一定区域,然后把这个区域的图裁下来,应该怎么做呢,谢谢帮我看看
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
*
******************************************************************************/class GuiCamera
{
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 GuiCamera()
{
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 GuiCamera(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! ");
} catch (Exception ex)
{
System.out.println(ex);
}
} public static void main(String[] args)
{
GuiCamera cam = new GuiCamera("Test", "png");
cam.snapShot();
}
}