The book "Feature-Based Keyframe Extraction and Matching for Video Retrieval" by Ajay Kumar explores the latest techniques and algorithms used for keyframe extraction and matching in the field of content-based video retrieval. Keyframe extraction is the process of selecting the most representative frames from a video and using them as a reference for indexing, searching, and retrieval purposes.

The book presents various approaches for keyframe extraction, including color histogram-based techniques, motion-based techniques, and a combination of both. The author also delves into the details of feature matching algorithms, which are used to match the extracted keyframes with query frames to retrieve the most relevant videos.

The book covers the challenges and limitations of existing techniques and explores novel solutions that are robust and efficient. It also discusses the applications of these techniques in various fields, such as surveillance, sports analysis, and video indexing.

The author, Ajay Kumar, is an experienced researcher and educator in the field of computer science and engineering. His research interests include computer vision, image processing, and content-based multimedia retrieval. This book is an essential resource for researchers, practitioners, and students in the field of multimedia information retrieval.