| High-precision image motion measurement applied for space camera based on hybrid opto-digital joint transform correlator | |
YiHongwei ; ZhaoHui; LiYingcai; Zhao Hui
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| 2011 | |
| 会议名称 | MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications |
| 会议录名称 | Proceedings of SPIE - The International Society for Optical Engineering |
| 页码 | 80061X |
| 会议日期 | November 4, 2011 - November 6, 2012 |
| 会议地点 | Guilin, China |
| 出版地 | P.O. Box 10, Bellingham, WA 98227-0027, United States |
| 出版者 | SPIE |
| 会议主办者 | Natl. Key Lab. Sci. Technol. Multi-spectral Inf. Process.; Huazhong University of Science and Technology; Guilin University of Electronic Technology |
| 产权排序 | 1 |
| 摘要 | Hybrid opto-digital joint transform correlator (HODJTC) is effective for image motion measurement, but it is different from the traditional joint transform correlator (JTC) because it only has one process of optical Fourier transform and the intermediate joint power spectrum (JPS) is directly input to a digital unit to compute the image motion. In original HODJTC, the correlation image is obtained by using a global discrete Fourier transform operator. In fact, the location of cross-correlation peak corresponding to zero image motion is known and the maximum image shift can also be estimated. Thus, the local cross-correlation image can be directly obtained by adopting a local Fourier transform operator instead. With the pixel-level location of cross-correlation peak is obtained, the up-sampling technique is introduced to relocate the peak in even higher accuracy. Both the experiments and simulations demonstrate that the RMS (root-mean-square) error of motion determination can be controlled below 0.05 pixels, which is a very promising result for real application. |
| 作者部门 | 空间光学技术研究室 |
| 收录类别 | EI ; CPCI |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| 文献类型 | 会议论文 |
| 条目标识符 | http://ir.opt.ac.cn/handle/181661/20210 |
| 专题 | 空间光学技术研究室 |
| 通讯作者 | Zhao Hui |
| 推荐引用方式 GB/T 7714 | YiHongwei,ZhaoHui,LiYingcai,et al. High-precision image motion measurement applied for space camera based on hybrid opto-digital joint transform correlator[C]. P.O. Box 10, Bellingham, WA 98227-0027, United States:SPIE,2011:80061X. |
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