Add option to modify IMU translation only (#29)

Add option to modify IMU translation only.

process_jsonl_data.py: Allow skipping extra frames in specific videos.

sync-imu-video.py: Filter out optical flow spikes (#28)

sync-imu-video.py: Filter out optical flow spikes.

Plot total system load in visualize.py

Bugfix in frame time diff visualizations

Add script to scale calibration.json files.

Compute FoVs in analyze-calibration.py

process_jsonl_data.py: Add option to crop by frame numbers.

sync-imu-video.py: Don't spam about failed frames.

process_jsonl_data.py: Always use mkv container.

guided-checkerboard-detection.py: Add option to subsample frames.

Improve guided calibration (#27)

Compute rotation between two IMU coordinate systems (#26)

Add option to smooth the IMU signals.

Compute rotation between two IMU coordinate systems.

modify-calibration: Fix set_first_to_second mode JSON reading.

process_jsonl_data: Allow specifying list of videos.

Sync by gnss time

Draw lines between corners.

Improve sync-imu-video.py presentation (#25)

Improve sync-imu-video.py presentation.

Support raw mcu JSONL triggers in visualize.py

Fix in jsonl-to-kalibr.py: tolerate 'altitude' sensor in the JSONL data