Automatic vergence and focus control of a microstereoscopic camera

摘要

This work introduces a microstereoscopic camera thatnemploys two microvideo sensors and a micromotion stage for auto-nmatic vergence and focus control. The parallel-axis stereo configu-nration using two video sensors enables the stereo camera to con-nverge and focus simultaneously on a real object. To calibrate bothnvergence and focus with respect to object distance, we derive annonlinear equation relating image disparity to object distance. Dis-ntance measurement using the equation yields very accurate resultsnat near distances. To verify focus control, image focus of differentnobject distances with and without automatic focusing is measurednand compared. 3-D reconstruction results of real objects are alsonpresented.