This lecture overviews 2D Systems, as they are the primary tools for many image processing and analysis operations. It covers the following topics in detail: Two-Dimensional Discrete LTI Systems. 2D convolutions. 2D correlation. 2D Systems Stability. 2D Finite Impulse Response (FIR) systems. 2D Infinite Impulse Response (IIR) systems Two-Dimensional z Transform and its properties. Transfer Function of Two-Dimensional Digital Filters. Implementation of Two-Dimensional Digital Filters.