This is probably more a Batik question but as I encountered it in the FOP context and Batik people are on this list here we go:
When decoding a TIFF image (black / white fax) using Batik and then looking at the returned color space, e.g. <image>.getColorModel().getColorSpace(); that color space has a profile of java.awa.color.ICC_ProfileRGB. However, I would have expected a color space of ICC_ProfileGray. This is sort of important as the correct color space must be set on the image object in the PDF. I currently set it manually but thats not ideal. Manuel