# Advanced detection settings for color marker tracking

Aim

To specify which colors EthoVision XT should follow when tracking color markers.

Prerequisites

▪You have marked the animals.

▪In the Experiment Settings under Tracked Features you selected Color marker tracking (treat marker as center-point).

Note that with this option you track only the marker, while the animal’s shape is ignored.

Procedure

1.Put the marked animals in the arena or play the video. Optimize the camera setup, lighting conditions and marker characteristics. See Tips for color tracking

2.In the Detection Settings window, under Video, select the image source and sample rate. See Video file, image quality and sample rate.

3.In the Detection Settings window, click Subject Identification.

4.Carry out steps 4 to 9 in Advanced detection settings: Marker-assisted identification for all subjects.

No additional settings are necessary, EthoVision XT tracks the markers and makes no estimate of the body contours.