Dissertation > Excellent graduate degree dissertation topics show

Ground-based optical observations CCD image acquisition and processing

Author: YangXuHai
Tutor: LiZhiGang；ZhengXingWu
School: Shaanxi Astronomical Observatory , Chinese Academy of Sciences
Course: Astrometry and celestial mechanics
Keywords: astrometry CCD digital image processing image centering image restoration atmosphere turbulence CLEAN technique equal power spectrum filtering.
CLC: P123.12
Type: Master's thesis
Year: 2000
Downloads: 283
Quote: 0
Read: Download Dissertation

Abstract


Due to the widely application of the CCD equipped optical telescope and Windows Operation System, the software of astronomical image capturing and processing needs to be updated. Considering astronomical observation with CCD system, a Windows operable software was developed to complete astronomical image apturing and processing, where a DH-VRT-CGI 00 image capturing card was adopted and VC++ language was used for the compilation that is very convenient for the practical application. The CCD capturing and stellar image centering are important in astronomical image processing. The present method of image centering has advantages of Stetson derivative searching method and moment method, which are considered to decrease the influence of the atmosphere turbulence and to improve both the precision of centering and the speed of calculation. Astronomical image restoration is a very important field in astronomical image procession Due to some facts (e.g., the atmosphere turbulence, diffiaction of the optical system and imperfection of CCD), the captured images on CCD become mostly blur and scintillant The influence of the optical and electronic system was analyzed in the paper, and an enhanced CLEAN algorithm was presented for restoration of CCD image. In addition, a new CLEAN algorithm was given, which can ensure the restoring quality and accelerate the velocity of the algorithm. CLEAN technique is widely used in radio interferometry and synthesis mapping, but it has never been extended to other field. This paper describes a succeed application of CLEAN in CCD image restoration Using simulated data, the performance of the filtering technique with equal power spectrum for astronomical image restoring was examined. Such a satisfactory experiment should be significant to those who are engaged in astronomical image processing.

Related Dissertations

  1. Study on Two Dimensional of Auto-Collimator Based on DSP,TH741.14
  2. Research on Temperature Measurement Technique Based on CCD Image Sensor,TH811
  3. Research on the Optimization of Laser Triangulation Device,TH744.5
  4. Research on Basic Algorithms of Digital Image Processing and Implementation with FPGA,TP391.41
  5. Research on Restoration of Images Collected by Reconnaissance System in Near-Space,TP391.41
  6. Research on Learning-Based Low-Level Vision Problem,TP391.41
  7. Data Collecting and Processing of Multi-Linear-CCD Visual Measuring System,TP274.2
  8. Research on Visual Servo System of Mechanical ARM,TP242.6
  9. Application Research of Digital Image Processing on Container Inspection,TP274.4
  10. The Combined Effect of Several Environmental Factor on Fertilization, Hatching and Juvenile Growth of Nile Tilapia,S917.4
  11. Research on Design of Intelligent Testing System of Grain Suspension Velocity,S220.2
  12. Flow Behavior Description of Two-Phase Flow Based on Image Processing Techniques,TP391.41
  13. MTF Measurement of CCD Digital Camera,TP391.41
  14. Image Restoration Method Research and Its Application Based on Probability PCA,TP391.41
  15. System Designing to Analysis the Real-time Density of Group-control Elevator Passengers Flow,TP391.41
  16. The Application of CMOS Imaging Sensor on AOI Equipment,TP212
  17. The Gray Image Processes Techology of Sediment Core and Its Application on the High Resolution Sediment Record in Inner Shelf of the East China Sea,P736.21
  18. Real-time Three-dimensional Profile Measurement and Software Developing,TP274
  19. Study of the Evaluation on the Homogeneity of Dielectric Barrier Discharges Basing on Digital Image Processing Technology,TP391.41
  20. Research on Pavement Crack Detection Algorithom Based on Digital Image Processing,TP391.41
  21. The image -based face recognition system design and implementation beautification,TP391.41

CLC: > Astronomy,Earth Sciences > Astronomy > Astrometry > Photographic astrometry learn > Astrophotography > Determination of the optical center and the pair of positioning
© 2012 www.DissertationTopic.Net  Mobile