cv_ Solution of mismatch between bridge and opencv

Problem description ：

ubuntu18.04 Installed ros default opencv Version and cv_bridge Version is 3.2.0 But when using other packages, you sometimes need to use other versions opencv. Call again cv_bridge There will be a call conflict ;

solve ：

1. Uninstall the original cv-bridge

sudo apt-get remove ros-melodic-cv-bridge

2. Download the new version cv_bridge

GitHub - ros-perception/vision_opencvhttps://github.com/ros-perception/vision_opencv choice melodic Corresponding cv_bridge

3. modify cv_bridge Medium cmakelists.txt

find_package(OpenCV 3.4.10 REQUIRED) // Change to what you installed opencv Version of

4.cmake A separate compile cv_bridge

stay cv_bridge Under the folder ,

mkdir build
cd build
cmake ..
make
sudo make install

5. What is needed in open source code cmaklist.txt Add cv_bridge Of cmake route

set(cv_bridge_DIR /usr/local/share/cv_bridge/cmake)  // stay find_package front 

Leave a message if you have any questions .

Reference link ：

solve cv_bridge and opencv Version matching problem between - You know

cv_bridge: cv-bridge for melodic