In recent years, underwater imaging has become an increasingly important field of study for researchers in marine biology, oceanography, and aquatic research. However, capturing high-quality images underwater is notoriously difficult due to various factors such as water absorption, light attenuation, and scattering, which can all contribute to image degradation. This is where the topic of image enhancement comes in, which aims to improve the quality of underwater images through a variety of techniques. In her book "Some Studies on Underwater Image Enhancement," author Rajni Sethi explores this fascinating area of research in depth. Drawing upon her expertise in digital imaging, computer vision, and computational photography, Sethi discusses a range of topics related to underwater image enhancement, from color correction and contrast enhancement to noise reduction and image restoration. One of the key challenges of underwater imaging is achieving good image clarity, given the various sources of interference that can contribute to image degradation. Sethi addresses this challenge by discussing different methods for improving image quality, such as image segmentation, filter design, and texture analysis. She also delves into the exciting area of machine learning and deep learning, exploring how these techniques can be used to improve image clarity and enhance image features. The book covers a wide range of techniques used in underwater image enhancement, including multispectral imaging, hyperspectral imaging, and image fusion, among others. Sethi also explores the use of underwater photography in marine biology and oceanography research, as well as in the exploration of submarine environments. Overall, "Some Studies on Underwater Image Enhancement" is an informative and comprehensive guide to the topic of underwater image enhancement, covering a range of techniques and methods that can be used to improve image quality in challenging underwater environments. This book will be of interest to researchers and practitioners in marine biology, oceanography, and aquatic research, as well as those interested in the fields of digital imaging, computer vision, and computational photography.