The recent advancements in digital image, machine vision, and artificial intelligence have greatly propelled the field of wavelet-based signal processing. The primary aim of this book is to equip readers, regardless of their familiarity with signal processing, with a solid foundation in the subject. The book delves into the fundamental concepts, enabling readers to gain a comprehensive understanding and eventually apply their knowledge to practical scenarios. It offers a thorough explanation of the underlying principles and showcases various wavelet-based applications. To illustrate key concepts and methodologies, comprehensive solutions and meticulous analysis of numerical data are presented. This book serves as an essential text for graduate and post-graduate students, as well as a valuable reference for wavelet design experts embarking on their journey in the field.