# OMR-Arena-Automated-Measurement-and-Stimulation-System-to-Determine-Mouse-Visual-Thresholds-Based-pone.0078058.s001

Visualization of the tracking algorithm. A video of one mouse placed on the platform in the setup performing OMR. To facilitate the detection of the nose position, coordinates are weighted with a function ranging from 0 at the border of the region around the platform that the mouse can reach with its nose to 1 at the center of the platform. The center of gravity (black X) is calculated based on weighted pixels (see color bar). It is usually located in the animal's hind-quarters region. The nose (white X in circle) is usually detected as the pixel farthest from the center of gravity. The position between the ears (white X) is determined as a center of mass in a circular region (white circle) around the location of the nose. The head-gaze (red arrow in A) is calculated as the vector from the position between the ears to the position of the nose.

- Kind: Short
- Year: 2013
- Runtime: 1 min
- By: Kretschmer F, Kretschmer V, Kunze V, Kretzberg J
- Archive: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:OMR-Arena-Automated-Measurement-and-Stimulation-System-to-Determine-Mouse-Visual-Thresholds-Based-pone.0078058.s001.ogv)
- Licence or status: [CC BY 3.0](https://creativecommons.org/licenses/by/3.0) (as the archive states it)
- Credit: Kretschmer F, Kretschmer V, Kunze V, Kretzberg J
- Who can watch: Teens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/commons/52275050?play=1)