Write to 16 bit BufferedImage TYPE_USHORT_GRAY

Question

I\'m trying to write 16 bit grayscale imagedata to a png using BufferedImage.TYPE_USHORT_GRAY. Normally I write to an image like so:

BufferedImage image = ne         


        

Answer 1

As pst already commented below my question:

Try using the Raster directly?

Accessing the Raster directly solved the problem.

Answer 2

You probably need to widen the signed 16bit shorts to ints and remove the sign:

int ushort = (int)(shortData[x][y]) & 0xFFFF;

Answer 3

From BufferedImage you can read

public static final int TYPE_USHORT_GRAY

Represents an unsigned short grayscale image, non-indexed). This image has a ComponentColorModel with a CS_GRAY ColorSpace.

So try instantiating your own ColorSpace with the CS_GRAY type (ColorSpace.getInstance(ColorSpace.CS_GRAY) should do it I suppose). This object has a method called fromRGB which you should be able to use...