Hello!
I would like to understand precisely how Kinovea defines the origin point (0,0) when the coordinate system is set to the center of the image, especially in videos with even resolutions such as 1920x1080 pixels.
By looking at the camera calibration parameters (cx = 960.0, cy = 540.0), it appears that the Cartesian origin (0,0) is placed exactly between pixels 959/960 (X axis) and 539/540 (Y axis). This suggests that Kinovea uses a continuous (subpixel) coordinate system, where (0,0) does not lie on a single specific pixel but in an intermediate position.
My question is: What is the exact value that Kinovea uses internally to represent the (0,0) point in image coordinates?