Analytical sub-band filtering technique of Two-Dimensional adaptive Notch Filter

A Two-Dimensional (2-D) Notch Filter is typically used for removing sinusoidal interferences from the a 2-D broadband image. An adaptive algorithm is subsequently applied to the filters in order to provide more flexibility to cope with multiple unknown interferences. Later on, a sub-band filtering technique is introduced to achieve decent convergence times. This work mainly focuses on an analysis of sub-band filtering methods. On previous work, a conventional 2-D FIR filter is used and the number of sub-band is not clearly recommended. Therefore, this work aims to provide other alternative methods of sub-band filtering and to clarify the issues related to the number of sub-bands. The simulation results is also presented including analysis of each method.