How to "count" the feature detected using SIFT algorithm?

I am using Chenggoju Naveen's code from FileExchange in Matlab, my problem is how can I literally "count" the features detected? Thank you so much!
Here's the link for the code https://www.mathworks.com/matlabcentral/fileexchange/43723-sift--scale-invariant-feature-transform--algorithm . BTW, i am using keypointsdetectingprogram.m script.

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2017 年 9 月 28 日

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