MATLAB: Hi, is it possible to implement a customized bagOfFeatures with a SIFT extractor? and detector

Question

I'm using MATLAB R2014b version with computer vision toolbox. I'm trying to generate classifiers with different types of extractors to analyse handwritten words, and for that i'm making use of bagOfFeatures function. MATLAB doesn't have a SIFT extractor code but it's possible to implement it or use David Lowe's version. How can i use this SIFT extractor (and detector) with the bagOfFeatures function?

Thanks

Answer 1

If you can upgrade to a later version (R2015a or higher), you can use the 'CustomExtractor' name-value pair to do this. Unfortunately, this wasn't part of R2014b.

http://www.mathworks.com/help/releases/R2015a/vision/ref/bagoffeatures-class.html