Irum, Isma, Muhammad Sharif, Mudassar Raza, and Mussarat Yasmin. 2015. “Salt and Pepper Noise Removal Filter for 8-Bit Images Based on Local and Global Occurrences of Grey Levels As Selection Indicator”. Nepal Journal of Science and Technology 15 (2):123-32. https://doi.org/10.3126/njst.v15i2.12128.