OpenCv in Java: DescriptorExtractor is deprecated. What do I use instead?

Question

I have some sample code which uses OpenCV (Java wrapper) to stitch 2 images together. It refers to a class \"DescriptorExtractor\" which is deprecated. I can\'t find any infor

Answer 1

I agree that Deprecated annotation in Java should have come with a required parameter which would provide information about the successor of the deprecated element, if any.

In OpenCV version 3.4.5 (and maybe earlier) in C++ docs DescriptorExtractor is defined as a type alias for Feature2D (see here):

typedef Feature2D DescriptorExtractor

so I believe you should switch to org.opencv.features2d.Feature2D class in your Java code updating its usages as appropriate.

With OpenCV wrappers (including ones for Java and Python) and corresponding auto-generated documentation, it is usually hard to infer any usage information - it is a good idea to consult with C++ sources and documentation, which appears to be hand-written.