Design of video geometric calibration system based on FPGA

ZHANG Hao; LING Chao-dong; CHEN Hu; HUANG Xin; YANG Xiao; TANG Wei; YAN Zheng

doi:10.3788/YJYXS20153003.0459

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Design of video geometric calibration system based on FPGA

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- Design of video geometric calibration system based on FPGA
- Chinese Journal of Liquid Crystals and Displays Vol. 30, Issue 3, Pages: 459-466(2015)
- 作者机构：
  
  1. 华侨大学信息科学与工程学院,福建厦门,361021
  2. 厦门市专用集成电路系统重点实验室, 福建厦门 361008
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20153003.0459
  CLC： TN911.73
- Received：14 October 2014，
  
  Revised：06 November 2014，
  
  Published Online：10 November 2014，
  
  Published：05 June 2015
- 稿件说明：
移动端阅览
张浩, 凌朝东, 陈虎, 黄信, 杨骁, 汤炜, 闫铮. 一种基于FPGA的视频几何校正系统设计方案[J]. 液晶与显示, 2015,30(3): 459-466

ZHANG Hao, LING Chao-dong, CHEN Hu, HUANG Xin, YANG Xiao, TANG Wei, YAN Zheng. Design of video geometric calibration system based on FPGA[J]. , 2015,30(3): 459-466
张浩, 凌朝东, 陈虎, 黄信, 杨骁, 汤炜, 闫铮. 一种基于FPGA的视频几何校正系统设计方案[J]. 液晶与显示, 2015,30(3): 459-466 DOI： 10.3788/YJYXS20153003.0459.

ZHANG Hao, LING Chao-dong, CHEN Hu, HUANG Xin, YANG Xiao, TANG Wei, YAN Zheng. Design of video geometric calibration system based on FPGA[J]. , 2015,30(3): 459-466 DOI： 10.3788/YJYXS20153003.0459.

摘要

为了满足大视场相关应用、尤其是大屏幕投影拼接技术应用领域对视频图像实时几何校正的要求

本文对视频图像的实时几何校正及其FPGA实现方法进行研究.首先

根据图像几何校正理论基础

利用Matlab等工具进行算法模拟仿真

确定了视频图像实时几何校正系统的基本框架.然后

根据现有的硬件平台DE2的硬件资源情况

细致规划系统结构

并对其中的核心部分几何校正模块进行仿真.最后

通过实际校正测试

断定实验结果达到视频图像实时几何校正的预期效果.实验结果表明:几何校正后

投影仪投射出的图像符合仿真结果

系统延时小于10个时钟周期

远小于毫秒级

且延时恒定

校正误差不超过1个像素.此方案达到了预期视频图像实时几何校正的效果

具有相当的借鉴、参考意义.

Abstract

In order to realize the real-time video image geometric calibration in large field of view image applications

especially in large format projection mosaic technique field

this paper analyzes the video image geometric calibration and its realization based on FPGA. First

according to the basic theory of image geometric calibration

this paper describes the simulation of algorithms with Matlab and other tools

and designs the basic frame of the video image geometric calibration system. Then

the system structure is detailed designed based on the hardware resources of DE2 platform and the geometric calibration module is simulated. Finally

based on the actual calibration test

this paper concludes that the experimental results achieve the desired target of real-time video image geometric calibration. Experimental results show that the image which has been calibrated and projected by projector is consistent with the simulation results. The delay of system is less than 10 clock cycles

far less than millisecond level

and the value of delay time is a constant. The inaccuracy of the calibration system is no more than one pixel. This design achieves the desired target of real-time video geometric calibration

which has considerable significance for reference.

关键词

Keywords

references

王胜正, 杨杰. 自动多投影仪非线性几何校正与图像边缘融合方法[J]. 上海交通大学学报, 2008, 42(4): 574-578. Wang S Z, Yang J. Auto-nonlinear geometry calibration and edge blending of multi-projector display system [J]. Journal of Shanghai Jiaotong University, 2008, 42(4): 574-578. (in Chinese)[2] 李斌. 低成本多投影仪拼接方法研究[D]. 济南:山东大学,2005. Li B. Study on Low-cost multi-projector mosaic [D]. Jinan: Shandong University, 2005. (in Chinese)[3] 张德丰. MATLAB数字图像处理[M]. 北京:机械工业出版社,2009. Zhang D F.Digital Image Processing with MATLAB [M]. Beijing: China Machine Press, 2009. (in Chinese)[4] 张铮,王艳平,薛桂香. 数字图像处理与机器视觉 [M]. 北京:人民邮电出版社,2010. Zhang Z, Wang Y P, Xue G X.Digital Image Processing and Machine Vision [M]. Beijing: Ports & Telecom Press, 2010. (in Chinese)[5] 陶婷婷,张亚萍. 多投影显示系统的几何校正及边缘融合技术研究与实现[J]. 云南师范大学学报,2014,34(1): 54-60. Tao T T, Zhang Y P. Research andrealization of geometric calibration and edge blending for multi-projector display system [J]. Journal of Yunnan Normal University, 2014, 34(1): 54-60. (in Chinese)[6] 刘淑. 多通道大屏幕图像无缝拼接技术研究[D]. 北京:北京交通大学,2011. Liu S. Theresearch on multi-projectors large format mosaic [D]. Beijing: Beijing Jiaotong University, 2011. (in Chinese)[7] Integrated Silicon Solution, Inc. IS61LV25616_Datasheet.pdf [OL]. www.issi.com, 2001.[8] 叶茂. 多屏投影显示系统的自动校正技术[D]. 成都:四川大学,计算机应用,2006. YE M. Automaticcalibration techniques for multi-projector display systems [D]. Chengdu: Sichuan University, 2006. (in Chinese)[9] Video Electronics Standards Association. VESA and industry standards and guidelines for computer display monitor timing (DMT) [EB]. 2004.[10] 蔡山,张浩,陈洪辉,等. 基于最小二乘法的分段三次曲线拟合方法研究[J]. 科学技术与工程,2007, 7(3): 352-355. Cai S, Zhang H, Chen H H,et al. Research of piecewise cubic-fitting method based on least-square principle [J]. Science Technology and Engineering, 2007, 7(3): 352-355. (in Chinese)

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