A hybrid logarithmic gradient algorithm for poisson noise removal in medical images

• Main Authors: Khursheed, Shahzad, Khaliq, Amir A, Shah, Jawad Ali, Abdullah, Suheel, Khan, Sheroz
• Format: Article
• Language: English
• Published: Hikari Ltd 2014
• Subjects: T Technology (General)
• Online Access: http://irep.iium.edu.my/41573/1/P3.pdf; http://irep.iium.edu.my/41573/; http://www.m-hikari.com/asb/asb2014/asb1-4-2014/khursheedASB1-4-2014.pdf
• Institution: Universiti Islam Antarabangsa Malaysia

This paper proposes a Poisson noise removal filter consisting of a modified gradient algorithm. Square of each pixel is subtracted from the center pixel of a 3x3 window. All gradient values are log added and then square root is taken. Bias reduction is done using log value of central pixel. The meth...