Rat Locomotion Analysis Based on Straight Line Detection in Hough Space

This paper demonstrates a method to perform movement analysis on rats named Movement Measurement in Hough Transform Space (MMHTS). The MMHTS method consists of representing locomotion of movement based on a system of linear equations and subsequently detecting the straight lines in the Hough transform space. Four straight lines L 0 , L 1 , L 2 and L 3 are detected, and with their information the angles between the beelines α 0 , α 1 , α 3 , intersection points p 1 x 1 , y 1 , p 2 x 2 , y 2 , p 3 x 3 , y 3 and their lengths d L 0 , d L 1 , d L 3 , d L 4 are measured, corresponding to the locomotion geometry of the rats’ limps. Experimentally, the MMHTS method was employed for locomotion movement and the obtained results were compared with professional design software, detecting the following miscalculations: 0.144° for the angle measurements, 0.131 for the length measurement and 0.139 for the point detection. Based in the measurements results and the calculated errors, the MMHTS method is efficient and exhibits a high application potential in motion analysis.