- #1
maverick280857
- 1,789
- 5
Hi
For our control systems project, we are trying to implement a closed feedback image focusing system. A digital camera captures the image of an object (a checkerboard), sends it to a computer algorithm which determines the amount of defocus in it and sends an actuation signal to a stepper motor controller which adjusts the focal length of the camera lens mechanically (by rotating the knob flanking the lens).
For our experimentation right now, we're using a Lego Mindstorms Vision Commad System camera (lego cam), but our challenge is to be able to couple a stepper motor to the focusing knob which does not rotate freely.
I have two questions:
1. Is there a USB webcam which has an adjustable focal length, with a knob that is convenient to couple with something?
2. What mechanism should be employed to couple the knob with the motor?
Thanks for your help.
Cheers
Vivek.
For our control systems project, we are trying to implement a closed feedback image focusing system. A digital camera captures the image of an object (a checkerboard), sends it to a computer algorithm which determines the amount of defocus in it and sends an actuation signal to a stepper motor controller which adjusts the focal length of the camera lens mechanically (by rotating the knob flanking the lens).
For our experimentation right now, we're using a Lego Mindstorms Vision Commad System camera (lego cam), but our challenge is to be able to couple a stepper motor to the focusing knob which does not rotate freely.
I have two questions:
1. Is there a USB webcam which has an adjustable focal length, with a knob that is convenient to couple with something?
2. What mechanism should be employed to couple the knob with the motor?
Thanks for your help.
Cheers
Vivek.