D esign of large-array CCD real-time display system

WANG Ming-fu; YANG Shi-hong; WU Qin-zhang

doi:10.3788/OPE.20101809.2053

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D esign of large-array CCD real-time display system

Article | 更新时间：2020-08-12

- D esign of large-array CCD real-time display system
- Optics and Precision Engineering Vol. 18, Issue 9, Pages: 2053-2059(2010)
- 作者机构：
  
  1. 中国科学院光电技术研究所, 四川成都 610209
  2. 中国科学院研究生院, 北京100049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20101809.2053
  CLC： TN27;TP752.1
- Received：21 September 2009，
  
  Revised：10 December 2009，
  
  Published Online：29 September 2010，
  
  Published：20 September 2010
- 稿件说明：
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王明富, 杨世洪, 吴钦章. 大面阵CCD图像实时显示系统的设计[J]. 光学精密工程, 2010,18(9): 2053-2059

WANG Ming-fu, YANG Shi-hong, WU Qin-zhang. D esign of large-array CCD real-time display system[J]. 光学精密工程, 2010,18(9): 2053-2059
王明富, 杨世洪, 吴钦章. 大面阵CCD图像实时显示系统的设计[J]. 光学精密工程, 2010,18(9): 2053-2059 DOI： 10.3788/OPE.20101809.2053.

WANG Ming-fu, YANG Shi-hong, WU Qin-zhang. D esign of large-array CCD real-time display system[J]. 光学精密工程, 2010,18(9): 2053-2059 DOI： 10.3788/OPE.20101809.2053.

摘要

为解决基于CameraLink接口的相机必须使用专用采集卡和系统机才能显示的问题

设计了一种结构简单、携带方便的图像实时显示系统。该系统采用2片SDRAM对图像进行交替缓存

并在Xilinx公司的Spatan3系列现场可编程门阵列(FPGA)中完成了较为复杂的主要控制逻辑。将CameraLink输入的图像经过拼接、BIN等预处理后缓存到1片SDRAM

同时按照一定格式以25 frame(50 field)/s的速度读出另1片SDRAM中的图像

经ADV7300转换成模拟电视信号后送到模拟显示器显示。结果表明

在相机帧频为3.6 frame/s时

该系统可以实时显示大面阵CCD数字航测相机拍摄的图像

能观察不同分辨率的图像以及原图像任何部位的细节

并能根据天气条件调整显示亮度以更好地观察图像。该系统只包含1块电路板和1个模拟显示器

已成功应用于4 0085 344面阵的CCD数字航测相机中。

Abstract

As the CCD camera based on CameraLink interface can not display images without a dedicated data acquisition card and system computer

a kind of simple and real-time image display system was designed for a 4 0085 344 array CCD camera based on CameraLink interface. Two SDRAMs were used in the system to storage images alternately

and the main logical function was accomplished in a Spatan3 family Field Programming Gate Array(FPGA) from Xilinx Company. The image data from CameraLink were storaged in a SDRAM by stitching and BIN processing

meanwhile

the image data read from another SDRAM at a speed of 25 frame/s(50 field /s) were convert to standard TV analog signals by a digital-to-analog encoder chip ADV7300 to display in an analog monitor. The verification results show that the system can real-time display the images of the large-array digital aerial camera with different resolutions and their details at a speed of 3.6 frame /s

and also can adjust the brightness of the images to get a good observation according to the weather conditions. The designed system only contains one PCB board and one alanog monitor and has been used in a CCD digital aerial camera with the 4 0085 344 array successfully.

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