kalibr

Kalibr, from the Russian word kalibr meaning caliber, may refer to several unrelated uses. One common meaning is a family of Russian precision-guided cruise missiles. The 3M-54 Kalibr family comprises air-, surface-, and submarine-launched missiles designed for anti-ship and land-attack missions. They employ inertial navigation with satellite updates and terminal guidance to achieve precision strikes, with variants offering different ranges and payloads. The missiles have been deployed since the mid-2000s and have seen operational use by the Russian Navy in various conflicts since the 2010s.

Kalibr is also the name of an open-source software toolbox used in robotics and computer vision for calibrating multi-sensor systems. It specializes in camera–IMU and camera–camera calibration, estimating extrinsic transforms between sensors, calibrating intrinsic camera parameters, and compensating for timing offsets. Kalibr is widely used in research and development projects and commonly runs with ROS and MATLAB/Octave. The toolbox supports a range of calibration tasks essential for accurate sensor fusion in autonomous systems, such as drones and ground vehicles.

In summary, Kalibr denotes both a line of Russian cruise missiles and a robotics calibration toolkit, reflecting distinct domains that share only the same name and linguistic origin.