在java中阅读大图

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class LargeImageProcessor {

    public static void main(String[] args) {
        try {
            File file = new File("path_to_large_image.jpg");
            BufferedImage image = ImageIO.read(file);

            int width = image.getWidth();
            int height = image.getHeight();
            int tileWidth = 512; // 每个块的大小
            int tileHeight = 512;

            for (int y = 0; y < height; y += tileHeight) {
                for (int x = 0; x < width; x += tileWidth) {
                    int w = Math.min(tileWidth, width - x);
                    int h = Math.min(tileHeight, height - y);

                    BufferedImage tile = image.getSubimage(x, y, w, h);
                    // 在这里处理tile，例如调整亮度、对比度等
                    processTile(tile);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void processTile(BufferedImage tile) {
        // 实现具体的图像处理逻辑
        // 例如：调整亮度、对比度等
    }
}