First off, I am working on windows XP.
I have found imagemagick fails to convert TIF to JPEG but the solution seems to be to use foremost:
It has to be run under cygwin but it works.
$ foremost -i imageinput.tif -o imageoutput
This creates an output folder where the jpeg file can be found.
Why is this useful? Because this enables printing to JPEG effectively. just print first to Microsoft Document Image Writer which produces a .MDI file.
The .MDI file easily converts to .TIF
Then use this process to get the .JPG
The process above is not really a “conversion”. More like extraction of the JPEG file within the TIF.