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Evaluation Method and System of Stereoscopic Projection Quality

LI Yan1,SU Ping2,MA Jian-she2,MAO Le-shan1(1.Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084; 2.Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,China)  
For polarized stereoscopic projector,the influence of two main performance para-meters,which are the inconsistency in color and brightness of the left and right optical paths and stereo crosstalk,on stereoscopic projection quality is studied.The stereoscopic projection quality will be influenced by a number of factors,which are two projection images not strictly coincident on the screen,two optical paths' difference in color and brightness,stereo crosstalk caused by the polarized glasses,etc.The evaluation method is presented to evaluate the stereoscopic projection quality according to those factors and the evaluation system is built.The system obtains projection images by a digital camera,those parameters were analyzed and calculated by OpenCV,and then were compared with the presented maximum deviation value,the comparison result were sent to display and feedback signal.The system function is verified by using a stereoscopic projector.The result indicates that the evaluation system can measure and feedback performance parameters of stereoscopic projector effectively,and help to analyze the stereoscopic projection quality of the polarized stereoscopic projector comprehensively,thus enhance the stereoscopic projection quality.
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