About thumbnails and data preparation

[JoelGardes]

For increasing graph lisility, here are some enhancements concerning thumbnails program

1. non graphical files
   Writing file name in a empty bitmap
   General syntax :
   "convert -pointsize 36 -fill red -background white label:<file_name> ../thumbnails/<index_name>.png"
   including subdirectories names of main directory
   but with discrete and tasteful colors

2. graphical files
   Adding files name label to thumbnail
   General syntax to add to present convert command:
   "label:'<initial_filename>' -gravity Center -append"
   <initial_filename> does not contain directory path, other option stays unchanged.

Informations on closed issue #17

3. using extracted data from documents (like PDF files)
   Such data must be considered as metadata from source document. We can be led to be able to compute clusters from such metadata.
   First example exists in MyLib: metadata are vectors of words extracted from PDF which are content.
   The need is to preserve relation between document name, metadata name and thumbnail name.

Actually, this relation is preserved with filenames themselve. Vectors and thumbnails are produced by external tools. That implies : ensuring that graph program allows ever to work with thumbnails directories (that means "with real filenames) or adapt thumbnails program including "convert" scripts.

For "prep-data" that means the ability to store source document, vector name and thumbnail presentation (see joined document in french on pivot format definition).

This issue replace existing issues #17 #38 #39 (which are closed)

roadmap LT documentare.pdf

[JoelGardes]

First tests : missing [0] in convert script (producing multipage thumbnails)