yes for better or worse a lot of processes do not have built-in documentation. this is mainly because juan does not want to write bogus help files like you see in a lot of crapware - "the saturation slider controls the saturation" or something like that. when he writes documentation, he writes the *hell* out of it. cf: ImageIntegration.
many of the newer processes have pretty extensive forum posts/tutorials that juan has written, for instance MultiscaleMedianTransform and TGVDenoise. unfortunately these are not linked from inside PI itself.
rob
