使用 BufferedImage 提取像素数据时遇到问题

问题描述

提示：Pastebin 图片来源：Link2

背景：这是一个 Java 中级计算机科学课程的编码项目。总结提示要求我们从几个不同的源图片中获取每个像素的中值。我已经通过 SOF 浏览了几个 questions，但我仍然不太明白如何从几个不同的源图片中获取单个像素。

我正在努力编写一个使用函数从 jpg 图片中读取像素的函数。

到目前为止我所做的：我设法将图片加载到数组中的 256 位源中。

我的尝试：我尝试使用 for 循环遍历所有图像，但我不知道如何将它们传递给适当的函数并让每个源“img”BufferImage 相互通信。

        for (int i = 0; i < img.getWidth(); i++) {
            for (int j = 0; j < img.getHeight(); j++) {
                int pixel = img.getRGB(i,j);
            }
        }

到目前为止我的代码：

import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.swing.plaf.basic.BasicComboBoxUI.FocusHandler;

import java.io.*;
import java.awt.event.*;

public class MedianFilter {
    BufferedImage img[];
    private File[] files;
    private BufferedImage filteredImage;

    public MedianFilter(String array[]) {
        files = new File[array.length];
        img = new BufferedImage[array.length];
        for (int i = 0; i < array.length; i++) {
            img[i] = readImage(new File(array[i]));
        }
        filteredImage = readImage(new File(array[0]));

    }

    private BufferedImage readImage(File imageFile) {// opens and reads in an image file
        BufferedImage img = null;
        try {
            if (!imageFile.exists())
                throw new IOException("Can't locate picture");
            else
                img = ImageIO.read(imageFile);
        } catch (IOException ie) {
            System.out.println(ie.getMessage());
        }
        return img;
    }

    public BufferedImage removeNoise() {

        for (int i = 0; i < filteredImage.getWidth(); i++) {
            for (int j = 0; j < filteredImage.getHeight(); j++) {
                filteredImage = getMedianValue();
            }
        }
        int p = img.getRGB(x,y);

        int trans = (p >> 24) & 0xff;
        int red = (p >> 16) & 0xff;
        int green = (p >> 8) & 0xff;
        int blue = p & 0xff;

        return filteredImage;
    } // gets the median value for all pixels and returns the filtered noiseless image

    public int getMedianValue(ArrayList pixels) {
        
    } // returns the median value of the pixel(x,y) for all images

    public int writeImage(String outputFilename) {
        File output;
        File f2 = new File(outputFilename);
        ImageIO.write(img,"jpg",f2); // write to file
    } // writes filteredImage to the outputFilename jpg file. Returns 0 if successful,// or -1 if an exception was thrown.

    public int getHeight(BufferedImage bimg) {
        int width = bimg.getWidth();
        int height = bimg.getHeight();
    } // returns height (y-dimension) of filteredImage

    public int getWidth(BufferedImage bimg) {

    } // returns width (x-dimension) of filteredImage

    public static void main(String[] args) {

        String[] vegs = { "vegs1.jpg","vegs2.jpg","vegs3.jpg","vegs4.jpg","vegs5.jpg","vegs6.jpg","vegs7.jpg","vegs8.jpg",};
        MedianFilter process = new MedianFilter(vegs);
        process.removeNoise();
        process.writeImage("output.jpg");
    }
}

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）