Introduction: A very widely accepted and used technique in today’s era is non other than Image Recognition. Before moving further in this topic let’s first see the domain where Image Recognition belongs. Image Recognition is a wide part of Image Processing. Image processing operations can be performed in the spatial domain and frequency domain of an image. Spatial domain refers to the matrix of pixels composing an image (original pixels of the image). In this topic we are just going to focus on the Spacial domain. What Is Image Recognition? Image recognition, a subcategory of Computer Vision and Artificial Intelligence, represents a set of methods for detecting and analyzing images to enable the automation of a specific task. It is a technology that is capable of identifying places, people, objects and many other types of elements within an image, and drawing conclusions from them by analyzing them. To understand, it is as simple as the phrase ”What-you-see-is-what-you-get”. ...