Draft JHOVE TIFF module vs. ImageMagick

compared with
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h4. LibTIFF

*{_}Validation{_}*: There are 695 different error messages in the sample ([listed here|https://docs.google.com/spreadsheets/d/1lZmLVrK3vv2-BUxw7YtTvyo7bC6qP7twHZQzTmwz8eU/edit#gid=967738359]), mostly very similar ones dealing with unknown TIFF tags. Reading the error messages, LibTIFF seems to check the tags only, and omits some general file-structure validation as the check of end-of-file tags. It does check the TIFF header for the magic number, though (see "_No TIFF magic number_"). As far as I know, there is only a txt-output (".log"), which in general is readable, but for bulk-analysis not much better than ImageMagick.

*{_}Handling:_* Well, you need Linux. At least a linux-emulator.