深圳信息职业技术学院计算机学院, 广东 深圳 518172
提出一种基于相位辅助系统的三维纹理重建方法,将采集到的纹理照片映射到几何模型表面,以实现对几何表面的纹理色彩的融合处理。建立了纹理映射优化函数,优化了目标物体和纹理照片的映射,并通过纹理融合处理,在最大程度上保证了目标物体纹理的逼真度,最终可得到逼真的三维物体纹理重建结果。还对局部缺失的目标模型或未采集到的局部纹理进行了修复,实现了三维纹理表面的自然过渡,从而保证目标模型纹理的完整性和一致性。不同类型实物的实验结果均证明该本文算法的可行性和有效性。
机器视觉 自由曲面 三维匹配 纹理映射 纹理融合 激光与光电子学进展
2018, 55(12): 121506
Author Affiliations
Abstract
Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, School of Information Science and Engineering, Hunan University, Changsha 410082, China
We experimentally investigate the transmission performance of 60-GHz signals over standard single-mode fiber (SSMF) and wireless links at different bit rates. Experimental results show that in a transmission of over 10-km SSMF and 1.3-m wireless link, bit rate reaches up to 5 Gb/s and bit error rate (BER) is less than 10^{-4}. The main limiting factor in such radio-over-fiber (ROF) systems is intersymbol interferences caused by the so-called walk-off effect when BER is below 10^{-8}. In addition, a transmission of over 20-km SSMF without chromatic dispersion compensation is brie°y investigated. For a BER of 10?8, the optical penalty is 2 dB.
光载无线通信系统 60 GHz 毫米波 无线传输 060.0060 Fiber optics and optical communications 060.2330 Fiber optics communications 060.2360 Fiber optics links and subsystems 060.5625 Radio frequency photonics Chinese Optics Letters
2011, 9(5): 050601
Author Affiliations
Abstract
Key Laboratory for Micro/Nano Opto-Electronic Devices of Ministry of Education and School of Computer and Communication, Hunan University, Changsha 410082, China
Turbo-coded 1.25-Gb/s orthogonal frequency-division multiplexing (OFDM) signals in 60-GHz radio-overfiber system are demonstrated. It can overcome impairments in fibers and extend transmission distance. Experimental results show that the transmission distance of turbo-coded OFDM signals at 1.25 Gb/s with coding (pure bit rate of 830 Mb/s) can be extended by over 30%.
长距离接入 编码 正交频分复用 光载无线 060.0060 Fiber optics and optical communications 060.1155 All-optical networks Chinese Optics Letters
2010, 8(11): 1024
