“The Quincunx Filter-Based Sharp Frequency Localized Contourlet Transform for Image Denoising”. Journal of Engineering and Sustainable Development 15, no. 2 (June 1, 2011): 1–11. Accessed May 18, 2024. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1381.