如何读取.bmp文件来识别Java中哪些像素是黑色的 [英] How to read a .bmp file identify which pixels are black in Java

问题描述

像下面这样的东西，除了使它工作：

  public void seeBMPImage（String BMPFileName）throws IOException { b $ b BufferedImage image = ImageIO.read（getClass（）。getResource（BMPFileName））; 
 
 int [] [] array2D = new int [66] [66]; （int xPixel = 0; xPixel< array2D.length; xPixel ++）
 
 for（int yPixel = 0; yPixel< array2D [xPixel] .length; yPixel ++）
 {
 int color = image.getRGB（xPixel，yPixel）; （（颜色>> 23）== 1）{
 array2D [xPixel] [yPixel] = 1; 
} else {
 array2D [xPixel] [yPixel] = 1; 
 
 
 
 $ b $ / code $ / pre 
 
解决方案我会用这个：
 $ b $ pre $  public void seeBMPImage（String BMPFileName）throws IOException {
 BufferedImage image = ImageIO.read（getClass（）。getResource（BMPFileName））; 
 
 int [] [] array2D = new int [image.getWidth（）] [image.getHeight（）]; （int yPixel = 0; yPixel< image.getHeight（））的
 
（int xPixel = 0; xPixel< image.getWidth（）; xPixel ++）
 { ; yPixel ++）
 {
 int color = image.getRGB（xPixel，yPixel）; 
 if（color == Color.BLACK.getRGB（））{
 array2D [xPixel] [yPixel] = 1; 
} else {
 array2D [xPixel] [yPixel] = 0; //？ 
 
 
 
 $ b code 
 
 
 
隐藏RGB的所有细节给你，是更容易理解。
 
Something like the following... except making it work:
public void seeBMPImage(String BMPFileName) throws IOException {
BufferedImage image = ImageIO.read(getClass().getResource(BMPFileName));

    int[][] array2D = new int[66][66];

for (int xPixel = 0; xPixel < array2D.length; xPixel++)
    {
        for (int yPixel = 0; yPixel < array2D[xPixel].length; yPixel++)
        {
            int color = image.getRGB(xPixel, yPixel);
            if ((color >> 23) == 1) {
                array2D[xPixel][yPixel] = 1;
            } else {
                array2D[xPixel][yPixel] = 1;
            }
        }
    }
}

解决方案
I would use this:
public void seeBMPImage(String BMPFileName) throws IOException {
    BufferedImage image = ImageIO.read(getClass().getResource(BMPFileName));

    int[][] array2D = new int[image.getWidth()][image.getHeight()];

    for (int xPixel = 0; xPixel < image.getWidth(); xPixel++)
        {
            for (int yPixel = 0; yPixel < image.getHeight(); yPixel++)
            {
                int color = image.getRGB(xPixel, yPixel);
                if (color==Color.BLACK.getRGB()) {
                    array2D[xPixel][yPixel] = 1;
                } else {
                    array2D[xPixel][yPixel] = 0; // ?
                }
            }
        }
    }
It hides all the details of RGB to you and is more comprehensible.

                        
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