이미지 로딩 및 디스플레이

이미지를 읽어들여서 화면에 표시하는 소스코드입니다.
BufferedImage 클래스와 WritableRaster 클래스를 이용합니다.

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package univ.inu.embedded.imgeditor; import java.awt.*; import java.awt.image.*; import java.io.*; import javax.imageio.*; import javax.swing.*; public class ImageFrame extends JFrame { private int width = 0; private int height = 0; private BufferedImage img = null; private MyImgPanel imgPanel = null; private class MyImgPanel extends JComponent { public void paint(Graphics g) { Graphics2D g2 = (Graphics2D)g; g2.drawImage(img, 0, 0, null); } } private void loadImage(String fname) { try { img = ImageIO.read(new File(fname)); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } WritableRaster wr = img.getRaster(); int[] pixelValue = new int[3]; for (int i = 0; i < img.getWidth(); i++) { for (int j = 0; j < img.getHeight(); j++) { wr.getPixel(i, j, pixelValue); int v = (pixelValue[0]+pixelValue[1]+pixelValue[2])/3; if (v > 127) { v = 255; } else { v = 0; } pixelValue[0] = v; pixelValue[1] = v; pixelValue[2] = v; wr.setPixel(i, j, pixelValue); } } } public ImageFrame () { this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); loadImage("dog.jpg"); width = img.getWidth(); height = img.getHeight(); imgPanel = new MyImgPanel(); imgPanel.setSize(width, height); this.add(imgPanel); this.setSize(width+10, height+10); this.setVisible(true); } public static void main(String argv[]) { new ImageFrame(); } }