The book has discussed contemporary methods of content based feature extraction from readily available image data. It carries valuable resources to understand the basics of machine learning and computer vision. It has referred to recent research works carried out in the said domain and has given a crisp details of fundamental practices of using content based image data. The book is expected to nurture novel ideas in PhD scholars as well as professional practitioners. The ideas explained in the book can help in feature dimension reduction for real time processes making them viable in practical scenarios.