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dorian3d / DBoW2

Enhanced hierarchical bag-of-word library for C++
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Question Vocabulary file #15

Closed Droppix closed 8 years ago

Droppix commented 8 years ago

Hi,

1/ Can I build database without Vocabulary file ? I have a crash. (Have you an example?)

2/ Is it possible to append the vocabulary file? To be more precise, I have files that will be added in time (uploaded by users), and therefore I would like to avoid rebuilding the vocabulary file every time a file is added.

3/ Is it possible replace file database (yml) by a database (cf. MongoDB) ?

Thanks Regards

dorian3d commented 8 years ago

Hi Ribert, 1) The database indexes images in their bow representation, so it's not possible to use it without a vocabulary. 2) My implementation does not deal with incremental vocabulary creation, so I'm afraid you have to recreate it if you want to update it. However, you can add images to a database that is based on a generic vocabulary. 3) The current implementation doesn't use any format other than the yml one. It's text-based (after unzipped if necessary), and the format is not difficult if you look at the source code. So you may want to write a script to convert to yml from other formats.

Droppix commented 8 years ago

Thanks for your response.

So, I modified "TemplatedDatabase.h" for customization the output (load, add), for write directly in the database, and add the possiblity to remove.