How to limit ORB features?

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Hi there, I'm using the new ORB feature detector function (https://www.mathworks.com/help/vision/ref/detectorbfeatures.html) and was wondering if there is a way to limit the number of detected features?

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Qu Cao 2019-5-23

You can probably use selectStrongest to select a fixed number of ORBPoints:

https://www.mathworks.com/help/vision/ref/kazepoints.selectstrongest.html

Helia Sh 2019-5-24

Thanks Qu Cao. It says that selectStrongest returns N number of points that have the strongest metrics. What are those metrics? How does it decide if the feature is stronger than a latter? Are there reading material on this feature?

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