BufferedImage包含两个主要类： Raster& ColorModel的的。 Raster本身由两个类组成， DataBufferByte 用于图像内容，而另一个用于像素颜色。

BufferedImage consists of two main classes: Raster & ColorModel. Raster itself consists of two classes, DataBufferByte for image content while the other for pixel color.

如果你想要DataBufferByte的数据，请使用：

if you want the data from DataBufferByte, use:

public byte[] extractBytes (String ImageName) throws IOException {
 // open image
 File imgPath = new File(ImageName);
 BufferedImage bufferedImage = ImageIO.read(imgPath);

 // get DataBufferBytes from Raster
 WritableRaster raster = bufferedImage .getRaster();
 DataBufferByte data   = (DataBufferByte) raster.getDataBuffer();

 return ( data.getData() );
}

现在你可以通过隐藏lsb中的文本来处理这些字节，例如，或者进程它就像你想要的那样。

now you can process these bytes by hiding text in lsb for example, or process it the way you want.