How to convert a Type_Byte_Binary BufferedImage with Alpha to an TYPE_4BYTE_ABGR

Im using the code

BufferedImage imgIn = ImageIO.read(is);

    BufferedImage image;
    if (imgIn.getType() != BufferedImage.TYPE_BYTE_INDEXED) {
        image = new BufferedImage(imgIn.getWidth(), imgIn.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
        ColorConvertOp cco = new ColorConvertOp(imgIn.getColorModel()
                .getColorSpace(), image.getColorModel().getColorSpace(), null);
        cco.filter(imgIn, image);
    } else {
        image = imgIn;
    }

When I'm pulling in an image with a Bit Depth of 4 it makes the imgIn a Type_Byte_Binary. When It gets converted to Type_4Byte_ABGR anything with partial transparency changes color and loses all alpha. Fully transparent pixels and Fully Opaque pixels remained unchanged.

Is there anything I can do to keep the partially transparent pixels from changing?

Thanks.