Application of fuzzy logic on astronomical images’ focus measures

Abstract

Focus accuracy is an essential factor that affects the quality of astronomical observations. The accuratemeasurement of celestial objects’ properties depends on focus. Automatic focusing is necessary for celestial imagingsystems. This paper presents a modified focus measure operator. It also proposes the use of fuzzy logic to transformimages because of its tolerance of imprecise and incomplete data. The focus operators are applied to two sequences ofstar clusters’ observations. The experimental results show that the suggested measure’s overall score exceeds those ofprevious operators.