make error in ubuntu

[lihan2016nju]

Hi, I am trying to run your code to create a disparity map with ubuntu. But when i run the make there are two errors.
So, should I add something in #include ?
Thanks!

[ 82%] Building CXX object CMakeFiles/epipolar.dir/epipolar.cpp.o
/home/panda/Desktop/disparity-map-master/epipolar.cpp: In function ‘void cacheDescriptorVals()’:
/home/panda/Desktop/disparity-map-master/epipolar.cpp:82:3: error: ‘OrbDescriptorExtractor’ was not declared in this scope
   OrbDescriptorExtractor extractor;
   ^
/home/panda/Desktop/disparity-map-master/epipolar.cpp:89:3: error: ‘extractor’ was not declared in this scope
   extractor.compute(img_left, kpl, img_left_desc);
   ^
CMakeFiles/epipolar.dir/build.make:62: recipe for target 'CMakeFiles/epipolar.dir/epipolar.cpp.o' failed
make[2]: *** [CMakeFiles/epipolar.dir/epipolar.cpp.o] Error 1
CMakeFiles/Makefile2:215: recipe for target 'CMakeFiles/epipolar.dir/all' failed
make[1]: *** [CMakeFiles/epipolar.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

[sourishg]

@lihan2016nju this error is due to a different OpenCV version which doesn't support OrbDescriptorExtractor. What version are you using?

I think if you're using 2.4.8 this error will go away.

[lihan2016nju]

@sourishg Thanks for your reply! I use 3.2.0 OpenCV version. Does it support orbDescriptorExtractor?
And, the other question i want to ask is if I have 2 images which have small-range overlap, what should I do? Should I cut the images first then run your code or just run it directly?
Thanks a lot!

[sourishg]

@lihan2016nju 3.2.0 doesn't support OrbDescriptorExtractor.

I'm not sure what you mean by small-range overlap. You should have two rectified images before finding the disparity map. The right rectified image should appear shifted to the left when compared to the left rectified image.

[RedOne88]

It would just remplace OrbDescriptorExtractor extractor by
Ptr extractor = ORB::create();

and
extractor.compute(img_left, kpl, img_left_desc); by
extractor->compute(img_left, kpl, img_left_desc);

[rabeehk]

I have to change Ptr extractor = ORB::create() with auto extractor = ORB::create(); to make it work.