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gif image shows only in black and white  RSS feed

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I'm trying to convert normal image to PlanarImage but the PlanarImage will show only black & white image in the applet. My guess is that it has something to do with bands but I can't figure out how to solve the problem.

Here is the code what I'm trying to use in applet's init method

public void init(){
Image my_gif;
URL base;
MediaTracker mt;

mt = new MediaTracker(this);
try {
base = getCodeBase();
catch (Exception e) {}

my_gif = getImage(base,"image.gif");

try {
catch (InterruptedException e) {}

int imageHeight = my_gif.getHeight(this);
int imageWidth = my_gif.getWidth(this);

int numBands = 3;
int len = imageHeight * imageWidth * numBands;

byte[] imageData = null;

PixelGrabber pixeli = new PixelGrabber(my_gif, 0, 0, imageWidth, imageHeight,false);
SeekableStream ss = null;
try {
imageData = (byte[])pixeli.getPixels();
} catch (InterruptedException e2) {

ColorModel cm = pixeli.getColorModel();
SampleModel sm = cm.createCompatibleSampleModel(imageWidth,imageHeight);

TiledImage tiledImage = new TiledImage(new Point(),sm,imageWidth,imageHeight);
DataBufferByte dbb = new DataBufferByte(imageData,len);

Raster raster = RasterFactory.createWritableRaster(sm,dbb,new Point());

PlanarImage image = (PlanarImage)tiledImage;
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