摘要
为了克服常规平行式成像系统拍摄的三维公共场景较小、无水平正视差导致三维再现只能处于屏幕前方、容易引起视疲劳等问题,提出了一种改进的平行式三维成像方法.在图像传感器中,以读出像素阵列中的部分未送入显示的预留像素为基础,借鉴离轴平行式显示技术,利用预留像素将读出像素阵列中用于显示的部分在水平方向进行相应偏移,最终送入3D显示器完成显示.在建立的数学模型上分析与推导,实现了水平视差P>0,使人眼感受的立体景象处于屏幕后方,增强了立体视觉效果.选用752×582分辨率的CCD在自行研制的640×480@120Hz系统上进行实验验证,证实了水平正视差产生的可行性,且三维公共场景夹角从常规的29°最大增大到34°,为设计出合适的正负视差及提高立体效果的研究提供了新方法.
To overcome issues in the conventional parallel three-dimensional imaging system,such as the smaller three-dimensional public scene,none of the horizontal positive parallax resulting in three-dimensional reproduction only in front of the screen and causing visual fatigue easily,an improved parallel 3Dimaging method was proposed.Based on the portion of the readout pixel array reserved but not used for display in most image sensors,the display array was made a corresponding horizontal offset by reference from off-axis parallel display technology and then fed in 3D display monitor.Through the analysis and derivation in the established mathematical model,the horizontal positive parallax production was realized,so three-dimensional reconstruction could be felt behind the screen,and the stereo visual effect was greatly enhanced.The proposed method was proved feasible on the self-developed system of 640×480@120Hz with selection of the CCD resolutions to 752×582,and the angle of three-dimensional public scene could be increased from the conventional 29°to a maximum of 34°.The proposed method provides a new direction for the appropriate design of the positive and negative parallax and for the study on the improvement of the stereo effect.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2013年第8期924-928,共5页
Acta Photonica Sinica
基金
国家自然科学基金(No.30900323)
中央高校基本科研业务费(No.CQDXWL-2012-124)资助
关键词
平行式
水平负视差
水平正视差
离轴
三维公共场景
Parallel
Horizontal negative parallax
Horizontal positive parallax
Off-axis
Threedimensional public scene
