Data science is an interdisciplinary field about processes and systems to extract knowledge or insights from data in various forms, either structured or unstructured, which is a continuation of some of the data analysis fields such as statistics, machine learning, data mining, and predictive analytics, similar to Knowledge Discovery in Databases (KDD).
Text Analysis is a process of organizing and describing text and natural language documents. It usually consists of retrieving information from text data, getting word frequency distributions, exploratory data analysis, visualising data, predictive analysis, pattern recognition with the applications of natural language processing, advance statistical methods and machine learning techniques.
Image analysis is the extraction of meaningful information and the ability of computers to recognize attributes within a digital image by means of digital image processing techniques. It is a broad description of converting the 2D spatial information in images into other forms that can be used to characterize their content. The most basic form of image analysis is the computation of statistical quantities.