fspindle
commented
6 years ago I never tried to track a ball with the model-based tracker using the model of a circle. I'm not sure it will work. Could be interesting to test using only the edges. The hybrid approach with KLT cannot work since the keypoints will not lie on a plane (they are on a sphere).
The init file should contain the coordinates of 4 3D points used to compute the initial pose. The user has than to click on the corresponding points that are in the image. It the radius is 0.1 the init file could contain the position of the point located a 12:00, 9:00, 6:00, 3:00 (if I consider the ball as a watch). If X goes from 9:00 to 3:00, Y goes from 6:00 to 12:00 the init file should look like:
4
0 0.1 0
-0.1 0 0
0 -0.1 0
0.1 0 0The difficulty for the user would be to click on the ball contour at point 12:00, 9:00, 6:00, 3:00.
Then the cao file:
V1
# Ball model
3 # Number of points
# 3D points
0 0 0 # pt 0: center of the ball
0 -0.1 0 # pt 1: bottom
0.1 0 0 # pt 2: right
# 3D lines
0
# Faces from 3D lines
0
# Faces from 3D points
0
# 3D cylinders
0
# 3D circles
1 # Number of circles
0.1 0 1 2 # circle 0: [radius] [circle center] [bottom point] [right point]
cheikhnasy
Hello everyone ! Can someone please help me in the design of an init file to detect a ball? i have my cao file ready but my initialization fails .
Thank you !