This package provides ROS image transport "cv" which compresses images using OpenCV imencode/imdecode functions.
The data field of the CompressedImage messages can be directly stored as image files of the corresponding type and interpreted by other programs.
The JPEG and PNG encoding done by this package is the same as compressed_image_transport. For better compatibility, use that package if possible.
This image transport also provides the image_transport_codecs interface. This means it is possible to directly encode/decode images from C++/Python code without the need for going through a pub/sub cycle. You don't even need a ROS master for the conversion.
Currently, the package offers encoder options corresponding to cv::imencode() in version 4.12 and 5.0.0-alpha.
The related C and C++ structs can change in the future as new imencode options will be added.
Make sure when using the C or C++ API directly to always update and rebuild both this and the dependent package at the same time. Otherwise, memory corruption and segfault errors can happen.
