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视差立体图像的生成算法 总被引:5,自引:1,他引:5
汪明霓 《杭州师范学院学报(自然科学版)》2004,3(5):420-422
阐述视差立体图像的原理和设计方法,介绍几种特殊的视差立体图像,包括连续∑面视差立体图像、大幅面视差立体图像和可双向观察的视差立体图像. 相似文献
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针对目前三维物体计算全息算法数据量大、计算速度慢及共轭像影响再现效果问题,提出一种全息体视图计算方法。根据人眼双目视差立体视觉原理,由摄像机获取三维物体不同角度的二维序列视差图像,通过计算全息算法得到多视角全息图,合成三维物体全息体视图。在迭代傅里叶变换算法的基础上,采用预设初始相位并增加反馈因子的方法,提高相息图的计算效率。基于液晶空间光调制器构建光学系统,对计算的全息体视图进行了光学再现。结果表明:该方法有效地排除了共轭像的干扰,相息图的迭代计算效率提高30%以上,再现图像与目标图像的结构相似度大于0.85。 相似文献
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Reconstruction resolution enhancement of EPISM based holographic stereogram with hogel spatial multiplexing
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Yunpeng Liu 《中国物理 B》2022,31(4):44201-044201
We investigate how the splicing mode of a holographic element (hogel) affects the reconstruction of a 3D scene to improve the reconstruction resolution of a holographic stereogram fabricated using the effective perspective image segmentation and mosaicking method (EPISM). First, the effect of hogel spatial multiplexing on holographic recording and reconstruction is studied based on the mechanism of recording interference fringes in the holographic recording medium. Second, combined with the influence of multiple exposures on the hologram's diffraction efficiency, the diffraction efficiency of the holographic stereogram is analyzed in the spatial multiplexing mode. The holographic stereogram is then regarded as a special optical imaging system. The theory of spatial bandwidth product is adopted to describe the comprehensive resolution of the holographic stereogram, which explains why hogel spatial multiplexing can significantly improve the reconstruction resolution of a holographic stereogram. Compared with the traditional printing method under the same parameters in optical experiments, hogel spatial multiplexing has a lower diffraction efficiency but a higher quality of reconstructed image, consistent with the theoretical analysis. 相似文献
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根据体视投影的基本原理,把AutoCAD的视窗功能、针对视窗的图层控制功能、在`图纸空间隐线的功能等加以综合应用,实现体视图的自动绘制。叙述了AutoCAD绘图软件绘制各类线框型体视图的方法,诸如互补色体视图、镜像体视图、分离型小幅面体视图、体视挂图及体视影胶片。 相似文献