public static byte[] Gray16BGR(byte[] bytes, int width, int height) {

        byte[] bgr = new byte[width * height * 3];
        int nCount =0;
        for (int i=0;i< height;i++) {
            for (int j = 0; j < width * 2; j= j+2) {
                int nLow = Byte.toUnsignedInt(bytes[i * width * 2 + j]);
                int nHigh = Byte.toUnsignedInt(bytes[i * width * 2 + j + 1]);

                int nGray16 = nHigh;
                nGray16 = nGray16 << 8;
                nGray16 = nGray16 + nLow;
                nGray16 = nGray16 >>2;

                byte gray8 = (byte) (nGray16 &0xFF);
                bgr[nCount] = gray8;
                bgr[nCount+1] = gray8;
                bgr[nCount+2] = gray8;

                nCount+=3;
            }
        }
        return bgr;
    }