فهرس المقالات Kimia Rezaei المقاله 1 - An Automatic Thresholding Approach to Gravitation-Based Edge Detection in Grey-Scale Images 20.1001.1.23221437.2021.9.36.5.6 10.52547/jist.9.36.285 Hamed Agahi Kimia Rezaei Journal of Information Systems and Telecommunication (JIST) , العدد 4 , السنة 9 , پاییز 2021