基于二维彩色图像和深度图的复杂三维场景的计算全息图  

Computer Generated Hologram of Complex Three-Dimensional Object Based on a Two-Dimensional Color Image and the Depth Map

作　　者：曹雪梅[1] 桑新柱[1] 陈志东[1] 冷俊敏[1] 张明[1] 郭南[1] 余重秀[1] 徐大雄[1] 

机构地区：[1]北京邮电大学信息光子学与光通信国家重点实验室,北京100876

出　　处：《中国激光》2014年第6期187-191,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61177018);教育部新世纪优秀人才项目(NECT-11-0596);北京市科技计划重点项目(D121100004812001);北京市科技新星项目(2011066)

摘　　要：提出了利用二维彩色图像和深度图生产计算菲涅耳全息图的方法。把二维彩色图像按深度图分为多层物面信息,并把每层物面深度值转换为菲涅耳衍射距离。根据层析法原理,采用单步菲涅耳衍射算法,即可得到三维场景的计算全息图。研究结果显示该方法可以正确地对复杂三维场景进行全息图的记录和再现。利用强度叠加法对再现像进行散斑去除,提高了再现三维图的质量。The computer generated Fresnel hologram of a complex three-dimensional（3D）object is synthesized based on a two-dimensional（2D）color image and a stereo matched depth map.The intensity of the color image is divided into multiple slices based on the depth map.The depth value of each slice is transformed into the distance of Fresnel diffraction.According to the principle of tomography,the hologram of the whole 3D scene can be achieved with the single step Fresnel diffraction method.The results show that the method can record and reconstruct the complex 3D object correctly.Intensity superposition method is used to suppress the speckle noise in the reconstructed images,which improves the representation quality significantly.

关 键 词：全息 深度图 层析法 单步菲涅耳衍射算法 强度叠加法 

分 类 号：TN26[电子电信—物理电子学]