The parallel stereoscopic camera has a linear relationship between vergence and focus control. We introduced the automatic control method for a stereoscopic camera system that uses the relationship between vergence and focus of a parallel stereoscopic camera. The automatic control method uses disparity compensation of the acquired image pair from the stereoscopic camera. For faster extraction of disparity information, the proposed binocular disparity estimation method by the one-dimensional cepstral filter algorithm would be investigated. The suggested system in this study greatly reduces the extraction time requirement and error so as to offer spontaneous control and greater real-time realism to acquire high quality stereoscopic images.
The geometry between the horizontal and the vertical shifts of the lens to the CCD plane is introduced for the automatic vergence control of the parallel stereo camera. Under the condition that the disparity of stereo image remains constant, the horizontal shift of camera lens causing stereo disparity and the vertical shift causing focus have linear geometry. With this geometry, a simple auto-focusing algorithm is applied to the stereo camera lens for the vergence control of the parallel stereo camera.
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