The JbData struct holds all the data required for
the compressed jbig-type representation of a set of images.
The data can be written to file, read back, and used
to regenerate an approximate version of the original,
which differs in two ways from the original:
(1) It uses a template image for each c.c. instead of the
original instance, for each occurrence on each page.
(2) It discards components with either a height or width larger
than the maximuma, given here by the lattice dimensions
used for storing the templates.
Definition at line 104 of file jbclass.h.