Hello Vivek. > I am not able to find any library which is using GPL and providing support > for CCITT. > > I fount out libtiff library that provides support for CCITT group 3/4 > encoder and decoder. > But it is not using GPL license.
The libtiff license is GPLv3-compatible, so we can link to it. Since libtiff is actively maintained and widely used I think that it is a really good option for the CCITT filters. Now we should be sure that the CCITT support in libtiff is enough to fullfit all the requirements of the PDF specification.
