Exposing more Keypoint and Feature2d C++ functions to Java API.

Transferred from http://code.opencv.org/issues/1866

|| Rui Marques on 2012-04-30 11:16
|| Priority: Normal
|| Affected: None
|| Category: java bindings
|| Tracker: Feature
|| Difficulty: None
|| PR: None
|| Platform: None / None

Exposing more Keypoint and Feature2d C++ functions to Java API.

I think it would be helpful to expose more functions, for example:

KeyPointsFilter::retainBest (ok this one can probably be already used indirectly by using ORB's nFeatures parameter)

KeyPoint::overlap (this might help as ORB, for example, returns a lot of keypoints that are close to each other and i think all those extra kpts won't help much to find an homography)

History

Alexander Shishkov on 2012-05-02 19:01

-   Target version set to 2.4.1
-   Assignee set to Andrey Pavlenko
-   Category set to java bindings

Alexander Shishkov on 2012-05-02 19:06

-   Target version changed from 2.4.1 to 3.0

Arjan Somers on 2012-05-10 08:48

I don´t know if the author also means setting the paramaters to the different keypoint detectors/extractors?

Currently the only way to set parameters (such as number of octaves etc) is only possible by writing a yaml file wich describes these settings and then load them from file. (Examples of this can be seen in the unit tests).

It would be nice to be able to set these parameters in a less hack-isch way.

Is this part of this feature feature request or should i make a new request?

Rui Marques on 2012-05-10 09:51

I was aware of the yaml method to set the parameters.
This particular feature request was about exposing more methods to Java but a better way to set the parameters would also be nice.

Start by reviewing the existing Java bindings for the feature2d and keypoint APIs, then compare their available functions with KeyPointsFilter::retainBest and KeyPoint::overlap. Clarify which additional functions and detector or extractor parameters are in scope; done means the agreed C++ functionality is exposed through the Java API.