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Ground mapping
https://forum.ipisoft.com/viewtopic.php?f=5&t=10232
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Author:  sokolman [ Fri Jan 31, 2020 7:25 am ]
Post subject:  Ground mapping

Hello,
We have a problem with floor calibration. The system detects the floor in rotation relative to the floor grid. Sometimes there is no rotation but with offset to the center point. How can we calibrate with correct floor mapping?
In the photo there is a 45st rotation offset.

Attachments:
Capture.PNG
Capture.PNG [ 1.43 MiB | Viewed 1959 times ]

Author:  vmaslov [ Fri Jan 31, 2020 9:56 am ]
Post subject:  Re: Ground mapping

Hi
Calibration procedure doesn't align coordinate system with detected ground points. And there are no any assumptions or requirements on the number and mutual positions of ground points.
However, if you prefer to align coordinates with your ground points marked on the floor you can do that. There is an abilty to rotate horizontal axes and move the origin of CS. But it's only available in action projects. So your workflow would be as follows:
  • Create/open an action project. You can even use a calibration video to create this project as you're not going to track motions, only to adjust CS. The main thing that your landmarks are visible in the video.
  • Load the scene from a calibration project.
  • Go to Scene tab and activate CS Move tool by pressing Move Coordinate System button at the bottom.
  • Using the tool, rotate the axes and move the origin as you need.
  • Save the scene and use it for other projects.

Author:  sokolman [ Mon Feb 03, 2020 4:34 am ]
Post subject:  Re: Ground mapping

Thanks! That works!
vmaslov wrote:
Hi
Calibration procedure doesn't align coordinate system with detected ground points. And there are no any assumptions or requirements on the number and mutual positions of ground points.
However, if you prefer to align coordinates with your ground points marked on the floor you can do that. There is an abilty to rotate horizontal axes and move the origin of CS. But it's only available in action projects. So your workflow would be as follows:
  • Create/open an action project. You can even use a calibration video to create this project as you're not going to track motions, only to adjust CS. The main thing that your landmarks are visible in the video.
  • Load the scene from a calibration project.
  • Go to Scene tab and activate CS Move tool by pressing Move Coordinate System button at the bottom.
  • Using the tool, rotate the axes and move the origin as you need.
  • Save the scene and use it for other projects.

Author:  vmaslov [ Mon Feb 03, 2020 5:32 am ]
Post subject:  Re: Ground mapping

BTW I notice that the calibration volume in your video is quite small - in less than 1 sq.m area. For more accurate calibration it's better to move marker through the whole capture area you're going to use.

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