WPIcal documentation initial draft #2691
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mcm001
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Aug 11, 2024
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Great stuff so far overall! Great to see this coming together. |
sciencewhiz
reviewed
Aug 12, 2024
source/docs/software/wpilib-tools/wpical/images/ChArUcoDetection.png
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mcm001
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Dec 26, 2024
mcm001
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Dec 27, 2024
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| Camera Calibration | ||
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| To measure the distance between tags in a video, you need the camera's intrinsics to account for things like distortion. WPIcal allows users to upload a video file to calibrate the camera in the tool, or upload a JSON file with your camera's intrinsics |
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How should I capture a video file? I was able to do it on linux with gstreamer, but it was pretty non-trivial.
gst-launch-1.0 -vvv v4l2src device=/dev/video0 extra-controls="c,gain=25,exposure_auto=1" ! image/jpeg,format=MJPG,width=1600,height=1200,framerate=50/1 ! jpegdec ! videoconvert ! tee name=t t. ! queue ! autovideosink t. ! queue ! videoconvert ! avimux ! filesink location=output.avi
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I've been using a phone camera and then transferring the file to a computer to calibrate. For linux It will need to be transcoded. Do you think we should document how to capture the video for linux machines too?
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OBS also works well
- Add a V4L2 video capture device
- Change properties:
- Under settings->video change the base resolution
- Settings->output, not sure why i don't see avi on linux but it should be an option
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Do you think documenting the proper video capture method is within scope of the project? On all other platforms we're assuming users capture video beforehand.
mcm001
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Dec 27, 2024
mcm001
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Dec 28, 2024
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Adds initial draft of documentation for new WPIcal tool: wpilibsuite/allwpilib#6915