[10:56 Fri,3.March 2023 by Thomas Richter]
DJI&s Action 2 is, thanks to a new firmware update, the first DJI actioncam that allows subsequent stabilization of recorded videos using gyro data. This is made possible because the new firmware (version 01.04.05.10) saves the data from the Action 2&s built-in gyro sensor along with the video. With their help, the free tool Gyroflow can recognize which movements the camera really made and does not have to guess based on a motion analysis of the images (Motion Estimation per Optical Flow).
This way, movements of the image subject can be distinguished much more reliably from unwanted shaking, so that the video can be subsequently stabilized by cropping the individual frames. Gyroflow even corrects rolling shutter artifacts.
How exactly does stabilization via gyro work?
Via motion sensor, the movement of the camera is measured and then this data is synchronized with the recorded video. A virtual camera can then be created that moves just like the physical camera and "projects" the image onto an imaginary plane or sphere. In addition, the gyro data can be used to correct for image distortions caused by the rolling shutter effect that occurs with camera movements due to the linear line-by-line readout of sensor data. Another (smoothed) camera can recapture the image, resulting in stabilized video. In practice, projection and recapture can be combined using sophisticated mathematical techniques. The procedure is nicely explained in the following video:
To work with the gyro data of the DJI Action 2 (here our test), Gyroflow version v1.4.2 or higher is required. It should also be noted that the DJI Action2 only records gyro data with the following camera settings: "Stabilization: Off"; "FOV: Wide"; "Resolution: 4K (4:3) 24/25/30/48/50/60 or 4K (16:9) 100/120".
DJI Action 2
Does gyro stabilization also come to the DJI Osmo Action 3?
The modular Action 2 is not DJI&s most recent actioncam model - the September 2022-launched
Osmo Action 3 with a classic actioncam design is newer. Hopefully DJI will soon release new firmware for this one as well, which will enable gyro data recording for this model as well.
more infos at bei forum.dji.com
deutsche Version dieser Seite: DJI Action 2: Neue Firmware bringt Bildstabilisation per Gyrodaten