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Bag of words training Image conditions

asked 2015-03-28 12:36:49 -0500

Abu Gaseem gravatar image

updated 2015-08-25 15:16:14 -0500

I'm planing to use the BOW approach , how much the angle / view should be differ between two Image of the same sene/object of interest ? In other world , considering these two images:

Train image 1

Train image 2

is the two image a good candidate for the training phase ?or one of them are sufficient in case of BOW with SURF Feature & descriptor Extractor Notice: to see the different between the two image , look at the upper right corner.

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answered 2015-03-28 14:18:23 -0500

Guanta gravatar image

One of the images should suffice, since the local descriptors of both images won't be very different and thus the global one (the BoW descriptor) won't be very different, too. Choose larger differences (distance, angle of view) and different lighting conditions. See for example the Oxford5k dataset (although there are also several pictures with only subtle changes).

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Thanks M.r Guanta .

Abu Gaseem gravatar imageAbu Gaseem ( 2015-03-29 02:59:07 -0500 )edit
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Asked: 2015-03-28 12:36:49 -0500

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Last updated: Mar 28 '15