我正在用Java读取简单的jpg图像并打印出像素数据的2d阵列。从JPG图像中读取像素数据
如果我有黑色的整个图像我得到了我期望: 这是10×20的黑色图像
而结果:
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
但是,如果我画一个白色行在图像的第一行我得到1的地方我不指望: 其他图像:
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 //Why??
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
这是我的代码:
byte[][]pixels;
BufferedImage image;
public ImageProcessor(File f) throws IOException{
image = ImageIO.read(f);
//Bitmap bMap = BitmapFactory.decodeFile(f.getAbsolutePath()); // Si es jpg
pixels = new byte[image.getWidth()][];
for (int x = 0; x < image.getWidth(); x++) {
pixels[x] = new byte[image.getHeight()];
for (int y = 0; y < image.getHeight(); y++) {
pixels[x][y] = (byte) (image.getRGB(x, y));
}
}
}
public void printPixelMatrix(){
for (int i = 0; i < image.getHeight(); i++) {
for (int j = 0; j < image.getWidth(); j++) {
System.out.print(" "+pixels[j][i] + " ");
}
System.out.print("\n");
}
}
有没有什么办法,我可以删除positve 1的从图像中获得确切的像素数据?或者是与我的图像编辑器有关的压缩东西? –
@PabloEstrada JPEG是基于丢失的压缩算法,你可以尝试使用不同的格式,比如png – MadProgrammer