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

About

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.

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Wikimedia Commons, in Wikimedia Commons

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CC BY 3.0, as the Wikimedia Commons states it.

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Creative Commons Attribution 3.0

Credit

Kretschmer F, Kretschmer V, Kunze V, Kretzberg J

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