However, no analysis have been made regarding its reliability and validity in a controlled laboratory set-up and compared to AutoCAD software using a coordinates selection furthermore, no analysis has been made regarding its reliability in measuring at different perspectives. Previous studies have inconclusive results: the reliability found ranges from poor to excellent, and the importance of the set-up has been highlighted. It has previously been validated as a tool to assess time-related variables.
#How to rotate a video on kinovea portable
Kinovea is an easy-to-use, portable and free tool that can be used in real field situations no previous experience is required to obtain accurate and reliable measurements. Several AutoCAD applications have been described as tools for application in clinical and sports sciences as a tool to measure distances, angles and coordinates. The 2D/3D program AutoCAD-2010 is commonly used in industrial design and architecture, and with scientific rigor in both the biomedical and engineering fields. Kinovea has been used in three main fields: sports, clinical analysis, and as a tool with which to compare the reliability of other new technologies. These measurements can be made from different perspectives, since the software carries out calibrations in non-perpendicular planes to the camera-object line analyzed. It enables the analysis of distances, angles, coordinates and spatial-temporal parameters frame by frame from a video recording. One such low-cost technology is Kinovea, a free 2D motion analysis software under GPLv2 license, created in 2009 via the non-profit collaboration of several researchers, athletes, coaches and programmers from all over the world. Prior to their standardized use to assess human gait (for example), it is important that these tools have proven to be valid and reliable. New 2D low-cost technologies are nowadays available, some of which may have a precision comparable to leading high-end reference systems, with a significantly lower cost (approximately £700 -€950 according to Ugbolue et al.
However, it involves technical difficulties in interpretation and set-up, and high-cost instrumentation and programs, which can limit its use in research and in clinics. One of the most rigorous and scientifically validated systems used in kinematic analysis is the three-dimensional (3D) motion analysis laboratory, which provide very accurate data. The study of kinematics is required given the need to objectify human movement in various fields, including sports management analysis, clinical research, footwear, and orthopedics, in order to obtain quantifiable data and to compare different subjects or different moments (pre and post treatment, training, etc.). Nevertheless, for optimum results an angle of 90° is suggested. The results indicate that the Kinovea software is a valid and reliable tool that is able to measure accurately at distances up to 5 m from the object and at an angle range of 90°–45°. A multiple approach was applied involving the analysis of the systematic error, with a two-way ANOVA 2x4 the relative reliability with Intraclass Correlation Coefficient (ICC) and the Coefficient of Variance (CV) (95% confidence interval) and the absolute reliability with the Standard Error (SE). Each frame was examined by three observers who made two attempts. For this purpose, a wire structure figure in the shape of a human lower limb was designed and measured in AutoCAD it was then recorded during a pendular motion with a video-camera placed at distance of 5 m and analyzed with Kinovea in the 4 perspectives (90°, 75°, 60° and 45°). The main objective of this study is to determine the validity of the Kinovea software compared to AutoCAD, and its intra and inter-rater reliability in obtaining coordinates data a second objective is to compare their results at 4 different perspectives (90°, 75°, 60° and 45°) and to assess the inter and intra rater reliability at each perspective.
Although it has been validated as a tool to assess time-related variables, few studies assessed its validity compared to a Gold Standard furthermore, its reliability in different perspectives has not been previously assessed. One interesting tool is that it can measure an object (or person) passing in front of the camera, taking into account the perspective between the camera and the recorded object.
This low-cost technology has been used in sports sciences, as well as in the clinical and research fields. Kinovea is a free 2D motion analysis software that can be used to measure kinematic parameters. An objective analysis of the human movement can help both clinical assessment and sports performance.