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How to limit ORB features?

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Helia Sh
Helia Sh on 18 Apr 2019
Answered: Qu Cao on 11 Sep 2019
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
Qu Cao on 23 May 2019
You can probably use selectStrongest to select a fixed number of ORBPoints:
Helia Sh
Helia Sh on 24 May 2019
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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Accepted Answer

Qu Cao
Qu Cao on 11 Sep 2019
Hi Helia, the selectStrongest function picks the points based on the Metric values:
For more information, you can take a look at the reference to see how the Matric is defined:

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