如何将图像转换为 java 中的 int[][]?

How to convert an image to int[][] in java?

我加载了一个二进制图像,我想将它转换为二维数组,特别是 int[][]:

public int[][] ImageToArray(String pathImage) throws IOException {

    File file = new File(pathImage);
    BufferedImage bufferedImage = ImageIO.read(file);

    int width = bufferedImage.getWidth();
    int height = bufferedImage.getHeight();
    int[][] imageArray = new int[width][height];

    return imageArray;}

但是当我 运行 我的源代码时出现异常:

Caused by: javax.imageio.IIOException: Can't read input file!

你能帮帮我吗?

如果你想得到所有的像素点作为二维数组(矩阵),你可以使用:

File file = new File(pathImage); // Be sure to read input file, you have error reading it.
BufferedImage bufferedImage = ImageIO.read(file);
WritableRaster wr = bufferedImage.getRaster();

那么该矩阵的用法就很简单了:

for (int i = 0; i < wr.getWidth(); i++) {
    for (int j = 0; j < wr.getHeight(); j++) {      
        int pixel = wr.getSample(i, j, 0); // the sample in the specified band for the pixel at the specified coordinate.
    }
}

还有其他获取和设置像素的方法,请务必阅读文档。 希望这有帮助。