Question

我正在尝试将像素矩阵转换为图像，但它不起作用。谁能帮我？下面是代码。这里我添加了一个print语句来检查它是否正在运行，但它也没有执行。谁能帮助我呢
这是给出问题的代码。
这是完整的代码。

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.awt.image.PixelGrabber;
import java.awt.image.WritableRaster;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public final class Util {
    /**
     * Converts a java.awt.Image into an array of pixels
     */
    public static int[] convertToPixels(Image img) {
        int width = img.getWidth(null);

        int height = img.getHeight(null);
        int[] pixel = new int[width * height];

        PixelGrabber pg = new PixelGrabber(img, 0, 0, width, height, pixel, 0, width);
        try {
            pg.grabPixels();
        } catch (InterruptedException e) {
            throw new IllegalStateException("Error: Interrupted Waiting for Pixels");
        }
        if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
            throw new IllegalStateException("Error: Image Fetch Aborted");
        }
        return pixel;
    }

    public static Image getImageFromArray(int[] pixels, int width, int height) throws IOException {
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        WritableRaster raster = (WritableRaster) image.getData();
        raster.setPixels(0, 0, width, height, pixels);
        File output = new File("C:\\out.png");
        ImageIO.write(image, "png", output);
        System.out.print("written");
        return image;
    }

    public static void main(String args[]) throws IOException {
        int width, height;
        BufferedImage source = ImageIO.read(new File(args[0]));
        width = source.getWidth();
        height = source.getHeight();
        // Util obj = new Util();
        Util.getImageFromArray(convertToPixels(source), width, height);
    }
}

Answer 1

public static Image getImageFromArray(int[] pixels, int width, int height) throws IOException {
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
    WritableRaster raster = image.getRaster(); //faster - no copy
    raster.setDataElements(0, 0, width, height, pixels); //instead of setPixels
    File output = new File("C:\\out.png");
    ImageIO.write(image, "png", output);
    System.out.print("written");
    return image;
}

从像素阵列转换图像

1 个答案: