Improvement of performance for CMOS area image sensors by TDI algorithm in digital domain

QU Hong-song; ZHANG Ye; JIN Guang

doi:10.3788/OPE.20101808.1896

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Improvement of performance for CMOS area image sensors by TDI algorithm in digital domain

Article | 更新时间：2020-08-12

- Improvement of performance for CMOS area image sensors by TDI algorithm in digital domain
- Optics and Precision Engineering Vol. 18, Issue 8, Pages: 1896-1903(2010)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20101808.1896
  CLC： TN386.5
- Received：23 March 2010，
  
  Revised：15 April 2010，
  
  Published Online：20 August 2010，
  
  Published：20 August 2010
- 稿件说明：
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曲宏松, 张叶, 金光. 基于数字域TDI算法改进面阵CMOS图像传感器功能[J]. 光学精密工程, 2010,18(8): 1896-1903

QU Hong-song, ZHANG Ye, JIN Guang. Improvement of performance for CMOS area image sensors by TDI algorithm in digital domain[J]. 光学精密工程, 2010,18(8): 1896-1903
曲宏松, 张叶, 金光. 基于数字域TDI算法改进面阵CMOS图像传感器功能[J]. 光学精密工程, 2010,18(8): 1896-1903 DOI： 10.3788/OPE.20101808.1896.

QU Hong-song, ZHANG Ye, JIN Guang. Improvement of performance for CMOS area image sensors by TDI algorithm in digital domain[J]. 光学精密工程, 2010,18(8): 1896-1903 DOI： 10.3788/OPE.20101808.1896.

摘要

为使面阵CMOS图像传感器具有TDI成像功能

研究了TDICCD的工作原理

提出了一种基于数字域的TDI算法

并讨论了如何利用FPGA实现该算法。该算法可在不改变CMOS器件构造的前提下

使其具有时间延迟积分功能。通过举例法推导出面阵CMOS图像传感器数字域TDI计算公式

并在此基础上优化了算法结构

优化后可以节省(

m-1)(m

-2)/2行内存空间。最后以航天相机为背景

讨论了地面像元分辨力、行转移时间与CMOS帧频的关系

通过一个算例计算出不同分辨力和积分级数条件下对CMOS帧频的要求。计算结果表明

帧频大于648 frame/s的1 2801 024CMOS

可以满足600 km轨道高度下地面像元分辨力为1 m的96级积分成像要求。

Abstract

In order to provide a TDI function for CMOS area image sensors

the working principles of TDICCDs are researched and a TDI algorithm based on the digital domain is proposed

then

how to realize the algorithm by a FPGA is discussed. The algorithm can realize time delay integration on CMOS sensors without changing its device structure.The TDI algorithm for CMOS area image sensors in a digital domain is deduced through an example method.After optimization

the algorithm with optimized structure can save (

m-1)(m

-2)/2 memory space of image lines. Finally

on the basis of a remote sensing camera

the dependence of pixel resolution and row transfer time on frame rate is discussed and the frame rate requirements under the Ground Sample Distances(GSDs) and TDI stages are calculated by the numerical example method.Experiment results show that the 1 2801 024 CMOS sensor with a frame rate more than 648 frame/s can meet the requirements of integration imaging for 1 m GSD of 96 TDI stages in an orbital altitude of 600 km.

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Keywords

references

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中科院长春光学精密机械与物理研究所

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