Research On Forward Motion Compensation In Panoramic Aerial Camera With TDI CCD Based On DSP

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Research On Forward Motion Compensation In Panoramic Aerial Camera With TDI CCD Based On DSP

Article | 更新时间：2020-08-13

- Research On Forward Motion Compensation In Panoramic Aerial Camera With TDI CCD Based On DSP
- Optics and Precision Engineering Vol. 16, Issue 12, Pages: 2465-2472(2008)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： V245.6
- Received：15 August 2008，
  
  Revised：08 October 2008，
  
  Published Online：25 December 2008，
  
  Published：25 December 2008
- 稿件说明：
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王德江,匡海鹏,蔡希昌,刘志明,张雪菲. TDI CCD全景航空相机前向像移补偿的DSP实现[J]. 光学精密工程, 2008,16(12):2465-2472

Research On Forward Motion Compensation In Panoramic Aerial Camera With TDI CCD Based On DSP[J]. Optics and precision engineering, 2008, 16(12): 2465-2472.
王德江,匡海鹏,蔡希昌,刘志明,张雪菲. TDI CCD全景航空相机前向像移补偿的DSP实现[J]. 光学精密工程, 2008,16(12):2465-2472 DOI：

Research On Forward Motion Compensation In Panoramic Aerial Camera With TDI CCD Based On DSP[J]. Optics and precision engineering, 2008, 16(12): 2465-2472. DOI：

摘要

航空相机拍照的过程中沿着飞行的方向，景物与感光介质之间存在着相对运动，此种运动称为前向像移。为了提高航空相机的照相分辨率，必须对该像移进行补偿，从而以使景物与感光介质在拍照的过程中相对静止。本文首先分析了TDI CCD(Time Delay and Integration Charge-Coupled Devices)全景航空相机前向像移的产生原因，像移补偿精度与伺服系统指标之间的关系，以及补偿机构－反射镜的工作方式，然后提出了一种基于定点DSP(Digital Signal Processing)芯片的像移补偿控制系统，将前向像移的补偿算法用DSP芯片实时实现。本文深入讨论了DSP伺服控制系统中的补偿精度、算法选择、相位计算、时间约束等关键问题，最后给出了一种适合于工程实际的硬件结构与软件流程。

Abstract

It will inevitably bring motion

which is called forward motion

to aerial images due to relative movement between scenes and sensitive medium. In order to improve aerial image resolutions

the motions must be compensated

so the scene and sensitive medium will keep relative stillness when photographing. First

this paper analyzes causes of image forward motions

relationships between compensation precision and requirements for servo control system

and operations of compensation structure-scanning mirror

then proposes a novel kind of forward motion compensation system using DSP chip

which implements control algorithm digitally. Meanwhile this paper also discusses some critical issues

such as compensation precision

algorithms selection

phase calculation and time constrains in servo control system when using DSP. Finally this paper describes hardware architecture and software flow chart suiting for engineering.

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Related Institution

Key Laboratory of Airborne Optical Imaging and Measurement， Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences

Changchun Institute of Optics，Fine Mechanics and Physics，Chinese Academy of Sciences

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University of Chinese Academy of Sciences

Changchun UP Optotech（Holding） Co.，ltd

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