在java中将像素数据转换为图像

问题描述

Hi
我有一个大小为640 * 480像素的图像数据，数据的格式为0s和1s，在txt文件中。因此，文本文件中有640 * 480 = 307200个字符（0和1）。问题是0表示原始图像中没有任何内容（比如黑色背景），1表示存在（例如用户站立且与用户blob有关），因此不要误用RGB或字节数据。

Hi I have data of an image of size 640 * 480 pixels, the data is in the format of 0s and 1s, in a txt file. Therefore there are 640*480=307200 characters (0s and 1s) in a text file. The catch is that 0 means that there was nothing in the original image (say black background) and 1 means there is (say a user is standing and it is pertaining to the user blob) and hence its NOT to be mistaken with RGB or byte data.

我需要读取并将其转换为java中大小为640 * 480像素的图像，其中0表示的像素可以设置为一种颜色（比如黑色） ）和1到其他（说白色）。

我该怎么办？谢谢你的帮助。

I need to read and convert this into an image of size 640*480 pixels in java,where pixels indicated by 0 may be set to one color (say black) and 1 to other (say white).
How do I do it??? thanks for help.

推荐答案

首先，你需要阅读它。如果你知道它的宽度，你可以做这样的事情：

First, you need to read it in. If you know it's width, you can do something like this:

BufferedReader in = new BufferedReader(new FileReader("myfile.txt"));
boolean[][] mask = new boolean[640][480];
int i = -1;
int count = 0;
while((i = in.read()) !- -1) {
    int x = count % 640;
    int y = count / 640;
    mask[x][y] = (i == '1');
    count++;
}

然后你可以这样画画

paint(Graphics g) {
    g.setColor(Color.BLACK);
    g.drawRect(0,0,640,480); // draw the black background

    // mask it with white
    g.setColor(Color.WHITE);
    for(int x = 0; x < 640); x++) {
        for(int y = 0; y < 480); y++) {
            if(mask[x][y]) g.drawRect(x,y,1,1);
        }
    }
}

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