Study of star image detecting technology in daytime strong background

For the purpose of measuring star in daytime, this paper presents a method of detecting a star body in daytime strong background. Using fuzzy entropy threshold to detect star object in daytime strong background. The fuzzy set theory has been successfully applied to many application areas, such as image processing, auto control, pattern recognition, etc. In this paper fuzzy theory and maximum entropy principle are applied to select the threshold value for gray-level image. Based on a lot of articles of scholars, this paper improves the membership function to save time of calculation. We have adopted to different methods to image of star body in daytime strong background. The experimental results demonstrate that the proposed approach can select the threshold automatically and effectively.