An Optimization Method of Three Dimensional Computer Generated Hologram Image and Verification

• Main Authors: Chun-Chi Chan, 詹畯棋
• Other Authors: Chien-Yu Chen
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/635d28

碩士 === 國立臺灣科技大學 === 色彩與照明科技研究所 === 106 === The fidelity and reconstruction quality are critical in holography display applications, three-dimensional (3D) displays particularly. In this thesis, a high fidelity three-dimensional computer generated holographic projection system is proposed, which combines retina projection system and three-dimensional computer generated holography for achieving the dynamic and large size three-dimensional computer generated holographic display. Modified Gerchberg-Saxton algorithm is utilized with combing rotation matrix and different directions of light sources to transform 3D object to phase-only function (POF), which can reconstruct multi-view of 3D object. The point-to-point method is adopted in modified Gerchberg-Saxton algorithm to retrieve POF with high accuracy. The reconstruction image reconstructed by POF will clear or blurr when focusing on reconstruction plane or others, respectively. In the reconstruction system, X-cube is utilized for combining R, G and B and orthogonal linear polarizer with oblique incidence for eliminating reflection light, moreover, the dynamic iamge is achieved by switching POFs. Finally, the fidelity and reconstruction image quality is accessed by structural similarity index (SSIM), related diffraction efficiency (RDE), root-mean-square error (RMSE), signal-to-noise ratio (SNR) and speckle contrast (SC) for evaluating the reconstrted image.