如何在Java中將圖像轉換為像素？

Question

我有JPEG的RGB圖像。 我想將此圖像轉換為像素並顯示在文本文件中。 這個怎么做？

public static int[][][] getPixelData(Image image) {

    // get Image pixels in 1D int array
    int width = image.getWidth(null);
    int height = image.getHeight(null);

    int[] imgDataOneD = imageToPixels(image);

private static int[] imageToPixels(Image image) {

    int height = image.getHeight(null);
    int width = image.getWidth(null);

    int pixels[] = new int[width * height];

    PixelGrabber grabber = new PixelGrabber(image, 0, 0, width, height, pixels, 0, width);

    try {
        grabber.grabPixels();
    } catch (InterruptedException e) {
    }

    return pixels;
}

如何將此信息存儲在文本文件中作為序列矢量格式？

Answer 1

您可以將整數保存為逗號分隔的列表。

確保還保存圖像寬度，以便可以還原圖像。

Answer 2

使用類似以下的內容。 希望這會有所幫助

import java.io.*;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;

public class ImageToText {
    public static void main(String args[]) throws IOException {
        File file = new File("your file path.jpg");
        BufferedImage image = ImageIO.read(file);
        // Getting pixel color by position x=100 and y=40

        for (int i = 0; i < image.getHeight(); i++) {
            for (int j = 0; j < image.getWidth(); j++) {
                int color = image.getRGB(j, i);

                // You can convert the colour to a readable format by changing
                // to following string. It is a 6 character hex
                // String clr = Integer.toHexString(color).substring(2);

                // Write this int value or string value to the text file
                // Add a comma or any other separator. Since it is always 6
                // characters long you can avoid using comma. It will save some
                // space.
            }
            // add a new line
        }
    }
}

您可以考慮自己的算法來讀取文本文件並檢索數據。 :-)