「java怎么定位图片坐标」java怎么看坐标
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本文目录一览：
java图片的坐标原点位置问题
canvas中有一个函数translate（）是用来实现画布平移的，画布的原状是以左上角为原点，向左是X轴正方向，向下是Y轴正方向，如下图所示，也就是（0,0）。
JAVA中如何在指定坐标显示图片
用绘图的方式把图片画上就可以了
public void paint(Graphics g){
ImageIcon img = new ImageIcon("pic.png");
g.drawImage(img,x,y,this);
}
怎么用java做一个图像细胞的标注测试的工具?，实现图片放大，框图，定位坐标？
public class PhotoFrame extends JFrame
{
private static final long serialVersionUID = -2216276219179107707L;
private Container con;
private MousePanel zPanel;
private JScrollPane imgSp;
private JPanel btnPanel;
private String imageDir;
private String currImg;//文件名，不包含目录
private int currIndex;//当前图片索引
ArrayListString imgList;//所有图片的绝对路径
public void writeCropImg() throws IOException
{
BufferedImage sourceImage = (BufferedImage) zPanel.getImg();
Image croppedImage;
ImageFilter cropFilter;
int x = zPanel.getPointX()-25;
int y = zPanel.getPointY()-25;
//四个参数分别为图像起点坐标和宽高，即CropImageFilter(int x,int y,int width,int height)，详细情况请参考API
//指定要裁剪的的文件的宽度和高度，以及起始坐标
cropFilter =new CropImageFilter(x,y,50,50);
//生成图片
croppedImage= Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(sourceImage.getSource(),cropFilter));
//获取创建后的图片的高度
int h1=croppedImage.getHeight(null);
int w1=croppedImage.getWidth(null);
BufferedImage bi=new BufferedImage(w1,h1,BufferedImage.TYPE_INT_RGB);
Graphics g=bi.getGraphics();
//在画图的时候可以设置背景色
g.drawImage(croppedImage,0,0,Color.white,null);
String dir = imageDir+"_crops";
//创建文件输出流
FileOutputStream fos=new FileOutputStream(new File(dir+"/"+currImg));
//将创建的图片写入到输出流
ImageIO.write(bi, "png", fos);
fos.close();
}
private void showNext()
{
updateCurrName();
zPanel.setImagePath(imgList.get(currIndex));
currIndex++;
}
private void updateCurrName()
{
String path = imgList.get(currIndex);
int index = path.lastIndexOf('/');
currImg = path.substring(index);
}
private class nextHandler implements ActionListener
{
@Override
public void actionPerformed(ActionEvent e)
{
showNext();
}
}
private class openDirHandler implements ActionListener
{
@Override
public void actionPerformed(ActionEvent e)
{
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);//设置只能选择目录
int returnVal = chooser.showOpenDialog(null);
if(returnVal == JFileChooser.APPROVE_OPTION)
{
imageDir =chooser.getSelectedFile().getPath();
imgList = FileTool.refreshFileList(imageDir);
currIndex = 0;
showNext();
//System.out.println ( "你选择的目录是：" + selectPath );
//你选择的目录是：/home/linger/imdata/collar
}
}
}
private void savePointAndImg()
{
try
{
String dir = imageDir+"_points";
int x = zPanel.getPointX();
int y = zPanel.getPointY();
//打开文件
File f=new File(dir+"/");
if(!f.exists())
{
f.mkdir();
}
f=new File(dir+"/"+currImg);
if(!f.exists())
{
f.createNewFile();
}
FileOutputStream fos=new FileOutputStream(f);
OutputStreamWriter osw=new OutputStreamWriter(fos,"UTF-8");
BufferedWriter bw=new BufferedWriter(osw);
//写入文件
bw.write(x+","+y);
//关闭文件
bw.close();
osw.close();
fos.close();
writeCropImg();
}
catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
private class savePointHandler implements ActionListener
{
@Override
public void actionPerformed(ActionEvent e)
{
savePointAndImg();
}
}
private class openImageHandler implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("JPG PNG Images", "jpg", "png");
chooser.setFileFilter(filter);
int returnVal = chooser.showOpenDialog(null);
if(returnVal == JFileChooser.APPROVE_OPTION)
{
File file = chooser.getSelectedFile();
imageDir = file.getParent();
imgList = FileTool.refreshFileList(imageDir);
currImg = file.getName();//文件名,不包含路径
// System.out.println();
String path = file.getAbsolutePath();
currIndex = imgList.indexOf(path);
zPanel.setImagePath(path);
currIndex++;
//内部类访问外部类,可以直接访问的啊
}
}
}
private PhotoFrame()
{
con = getContentPane();
con.setLayout(new GridLayout(2,2));
zPanel = new MousePanel();
//zPanel.setImagePath("/home/linger/17820d01");//绑定图片
//zPanel.setPreferredSize(new Dimension(zPanel.getImgWidth(), zPanel.getImgHeight()));
imgSp = new JScrollPane();
imgSp.setPreferredSize(new Dimension(zPanel.getImgWidth(), zPanel.getImgHeight()));
imgSp.setViewportView(zPanel);
imgSp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
imgSp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
//con.add(imgSp, BorderLayout.CENTER);
con.add(imgSp);
btnPanel = new JPanel();
btnPanel.setLayout(new FlowLayout());
btnPanel.setSize(300,100);
JButton button = new JButton("打开图片");
button.setSize(100, 50);
btnPanel.add(button);
button.addActionListener(new openImageHandler());
button = new JButton("保存坐标");
button.setSize(100, 50);
btnPanel.add(button);
button.addActionListener(new savePointHandler());
button = new JButton("打开目录");
button.setSize(100, 50);
btnPanel.add(button);
button.addActionListener(new openDirHandler());
button = new JButton("下一张");
button.setSize(100, 50);
btnPanel.add(button);
button.addActionListener(new nextHandler());
con.add(btnPanel);
zPanel.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
if(e.getClickCount() == 2)
{
savePointAndImg();
showNext();
}
}
});
finalSetting();
}
private void finalSetting()
{
setTitle("标注工具");
Toolkit kit = Toolkit.getDefaultToolkit();
Dimension screenSize = kit.getScreenSize();
int screenHeight = screenSize.height;
int screenWidth = screenSize.width;
int frameH = getHeight();
int frameW = getWidth();
setLocation((screenWidth - frameW) / 2 - 250,
(screenHeight - frameH) / 2 - 250);
setSize(800, 600);
//setSize(zPanel.getImgWidth()+10, zPanel.getImgHeight()+10);
//setPreferredSize(new Dimension(zPanel.getImgWidth()+100, zPanel.getImgHeight()+100));
//pack();
setVisible(true);
setResizable(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args)
{
new PhotoFrame();
}
}
java怎么定位图片坐标的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java怎么看坐标、java怎么定位图片坐标的信息别忘了在本站进行查找喔。
发布于：2022-11-23，除非注明，否则均为原创文章，转载请注明出处。