How do I create a BufferedImage from array containing pixels?

问题

I get the pixels from BufferedImage using the method getRGB(). The pixels are stored in array called data[]. After some manipulation on data array, I need to create a BufferedImage again so that I can pass it to a module which will display the modified image, from this data array, but I am stuck with it.

回答1:

BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

Then set the pixels again.

bufferedImage.setRGB(x, y, your_value);

_{PS: as stated in the comments, please use the answer from @TacticalCoder}

回答2:

I get the pixels from the BufferedImage using the method getRGB(). The pixels are stored in array called data[].

Note that this can possibly be terribly slow. If your BufferedImage supports it, you may want to instead access the underlying int[] and directly copy/read the pixels from there.

For example, to fastly copy your data[] into the underlying int[] of a new BufferedImage:

BufferedImage bi = new BufferedImage( w, h, BufferedImage.TYPE_INT_ARGB );
final int[] a = ( (DataBufferInt) res.getRaster().getDataBuffer() ).getData();
System.arraycopy(data, 0, a, 0, data.length);

Of course you want to make sure that your data[] contains pixels in the same representation as your BufferedImage (ARGB in this example).