CODEWITHSUNDEEP
javaopencvjavacv
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Reputation: 67280

JavaCV - what is the difference between prefix 'cv' and not

Like there is

opencv_imgproc.HoughLines

and 

opencv_imgproc.cvHoughLines2

They use different data types. The former uses Mat, the second uses CvArr. Why? And which one would I use?

Upvotes: 1

Views: 115

Answers (1)

EdChum
EdChum

Reputation: 394041

The cv prefixed ones are the C interface versions so the arg types are different as the non prefixed one will use the c++ interface version.

I'd use the C++ one personally. The types are different due to Mat being a C++ class type that also has some templated methods that are unsupported in the c language.

There may also be an argument that the C++ version may be optimised better but you'd have to profile this. Additionally I'd expect the bindings between C++ and stuff like CUDA to be more efficient also, again this would need to be profiled.

Upvotes: 1

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