Problem in creating BufferedImage

Question

Hi all,
I'm trying to create a BufferdImage object from a byte array. which has the pixel values of a Gray scale image (8 bits per pixel).
This is the code, I am trying with..
    private ColorModel colorModel;
    private SampleModel sampleModel;   
    private int bitsPerPixel;   
    private int numBands;   
    public BufferedImage convertImageDataToImage(byte[] data)
        if (bitsPerPixel == 8)
            numBands = 1;
            int[] bandOffsets = new int[numBands];
            for (int i = 0; i < numBands; i++)
                bandOffsets[i] = numBands - 1 - i;
            sampleModel = new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE,
                width, height, numBands, numBands * width, bandOffsets);
            if (ImageUtil.isIndicesForGrayscale(data, data, data))
                colorModel = ImageUtil.createColorModel(null, sampleModel);
            else colorModel = new IndexColorModel(bitsPerPixel, data.length,
                data, data, data);
        DataBuffer db = new DataBufferByte(data, width * height);
        WritableRaster wr = Raster.createPackedRaster(db, width, height,
            bitsPerPixel, new Point(0, 0));
        Hashtable ht = new Hashtable();
        ht.put("", "t");
        BufferedImage bi = new BufferedImage(colorModel, wr, false, null);
        return bi;
    }I'm getting the following error while executing the above code
Exception in thread "main" java.lang.IllegalArgumentException: Raster sun.awt.image.SunWritableRaster@1bd0dd4 is incompatible with ColorModel IndexColorModel: #pixelBits = 8 numComponents = 3 color space = java.awt.color.ICC_ColorSpace@d70d7a transparency = 1 transIndex   = -1 has alpha = false isAlphaPre = false
     at java.awt.image.BufferedImage.<init>(Unknown Source)Error occurs at..
BufferedImage bi = new BufferedImage(colorModel,wr,false,null);
Could any one please help me, what is the wrong here..
Thanks and Regards
Ramesh

Answer 1

any one knows the root cause?
Edited by: Rameshkumar.Ramasamy on Feb 22, 2008 5:10 PM