How do I get a TYPE_BYTE_BINARY using blue/white instead of black/white

Im loading bi-tonal tiffs into a bufferedimage using imageio, plugin from jai. These bufferedimage come out as TYPE_BYTE_BINARY. The default for the two colors is black and white. I am trying to change it to blue and white without changeing the type. Anyone have any clues how to go about doing this?

image I used came out fuzzyIt is not color conversion issue. Solution is two fold:
(1) You should do proper pre-process on the original image before conversion.
(You might have to enhance the sharpness of the image.)
(2) You should do proper dithering on the resultant image after conversion.
(BufferedImage per se doesn't do dithering. ConvolveOp or LookupOp could be used, I have no experience on them though.)

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How do I get a TYPE_BYTE_BINARY using blue/white instead of black/white

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