Radial Distortion Correction Based On Improved Hough Transform Algorithm For Video Tracking: Measurement Error To Kinematic Analysis In Futsal
Por L. H. P. Vieira (Autor), E. A. Pagnoca (Autor), F. Milioni (Autor), R. A. Barbieri (Autor), V. L. Andrade (Autor), R. P. Menezes (Autor), L. Alvarez (Autor), L. G. Déniz (Autor), D. Santana-cedrés (Autor), P. R. P. Santiago (Autor).
Resumo
The aim of this study was to assess the applicability and reliability of a single GoPro® camera with sequences of images with distortion corrected for the kinematic analysis of tracking in futsal. We compared tracking performed with three cameras equipped with conventional lens to a GoPro® camera with a 170° aperture wide-angle lens. A five-minute excerpt of the game showed an average difference of 2.11 m.min-1 between the total distance covered obtained by tracking with the GoPro® camera and its distortion correction (438.97±164.65 m), and cameras with conventional lens (449.54±170.92 m). Static error was 0.19 m. We showed that a single GoPro® Hero 3+ can provide a reliable kinematic analysis of computational tracking based on videogrammetry for futsal, using the Hough transform and division model technique for radial distortion correction.
