upgrade opencv version in melodic

Trying to update opencv in ROS is a bad idea. In theory it can be done, but you must now locally build any ROS packages that rely on opencv from their source code, and you have to debug any library changes the opencv devs made. It is a non-trivial amount of work.

It is less work to upgrade to noetic if it is using a version of opencv that is acceptable to you.

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thx, i decided Do Not Upgrade OpenCv.. it doesn't work with ros related pkgs.

danekim ( 2022-01-25 01:41:38 -0600 )edit

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answered 2022-01-15 10:38:22 -0600

Akhil Kurup

459 ●1 ●56 ●14 https://sites.google.c...

As @Mike Scheutzow said, it is hard to get a different version of opencv working with ROS. But if you wanna try it anyways, this is what I have done in the past:

mkdir ~/opencv && cd ~/opencv
git clone https://github.com/opencv/opencv.git
git clone https://github.com/opencv/opencv_contrib.git
cd ~/opencv/opencv
git checkout 3.4.X
cd ~/opencv/opencv_contrib
git checkout 3.4.X

cd ~/opencv/opencv
mkdir build && cd build
cmake -DOPENCV_EXTRA_MODULES_PATH=$HOME/opencv/opencv_contrib/modules -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_opencv_cnn_3dobj=OFF ..
make -j`nproc`
make install

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