How to convert color tiff into black and white?

Question

Hey guys, am new to JAI and need to convert a color tiff into black and white, I've gone through google and developed following code.
img = JAI.create("fileload","C:/eosimias.tif");
               newColorModel = new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),new int[] {8},
                         false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
               pb = new ParameterBlock();
               pb.addSource(img);
               pb.add(newColorModel);
               img2 = JAI.create("ColorConvert", pb);
frame = new JFrame("Tiff study");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.add(new ScrollingImagePanel(img2, 400,400));
          frame.pack();
          frame.setVisible(true);When I execute the following program I get the following error
java.lang.IllegalArgumentException: The specified ColorModel is incompatible with the image SampleModel.
on the line frame.add(new ScrollingImagePanel(img2, 400,400));can someone please help me out with it.
Thank you in advance.

Answer 1

Check under Image> Mode and select 8 Bits / Channel  first.
Cheers,
Neale
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