Digital Image Processing (DIP) involves the manipulation and interpretation of digital images with the aid of a computer. This form of remote sensing may include seven broad types of computer-assisted operations including Image Rectification and Restoration, Image Enhancement, Image Classification, Data Merging and GIS Integration, Hyper-spectral Image Analysis, Biophysical Modeling, and Image Transmission and Compression.
According to Lillesand and Kiefer (2003), Remote Sensing is the science and art of obtaining information about an object, area, or phenomenon through the analysis of data acquired by a device that is not in contact with the object, area, or phenomenon under investigation. Digital remotely sensed data are an ever-increasing input to GIS databases especially where large areas must be analyzed and repeat coverage is necessary because of rapidly changing conditions. Remote Sensing is the technology that is now used vastly, by which the Earth’s surface and atmosphere, the planets, and the entire universe are being observed, measured, and interpreted from such vantage points as the terrestrial surface, earth-orbit and outer space.
Geographic Information System and Remote Sensing together helps in taking care of business by leveraging technology that facilitates to see the big picture, make the best decisions, and capitalize on the organization’s investment both in terms of data and resources. The GIS software offers an innovative solution that helps to create, visualize, analysis and present information better and more effectively.