19 بهمن 1401
سكينه اسدي اميري

سکینه اسدی امیری

مرتبه علمی: استادیار
نشانی: دانشگاه مازندران
تحصیلات: دکترای تخصصی / مهندسی کامپیوتر
تلفن: 011-35302901
دانشکده: دانشکده مهندسی و فناوری

مشخصات پژوهش

عنوان Image Enhancement Using an Adaptive Un-sharp Masking Method Considering the Gradient Variation
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
un-sharp masking, blur image, image gradient, image enhancement
مجله International Journal of Engineering , Transactions B: Applications
شناسه DOI 10.5829/ije.2017.30.08b.02
پژوهشگران زهرا مرتضایی (نفر اول) ، حمید حسن پور (نفر دوم) ، سکینه اسدی امیری (نفر سوم)

چکیده

Technical limitations in image capturing usually impose defect, such as contrast degradation. There are different approaches to improve the contrast of an image. Among the exiting approaches, un-sharp masking is a popular method due to its simplicity in implementation and computation. There is an important parameter in un-sharp masking, named gain factor, which affects the quality of the enhanced image. In this paper, a new adaptive un-sharp masking method is proposed. In the proposed method gradient variation of the image is used to estimate the gain factor for un-sharp masking. Gradient variation of an image can provide information about the image contrast. Subjective and objective image quality assessments are used to compare the performance of the proposed method both with the classic and the recently developed un-sharp masking methods. The experimental results show the superiority of the proposed method compared to the existing methods in image enhancing using unsharp masking.