Document Type : Research Paper

Author

• Mahdi Modiri

Associate Professor of Urban planning, Malek-Ashtar University of Technolog

Abstract

Most of satellite images are received in digital form and the logical way of dealing with them is digital processing. Human interprets images very well. However, our eyes have limitations in observing black-and-white pictures in a range of electromagnetic waves’ spectra through looking at colored images and a combination of different bands. It is possible that at one time they look at a particular part of three bands in a colored combination, so other bands are not used. eye is not able to fully distinguish different infrared reflections of a picture from that of another picture, while near infrared, in comparison with red waves reflection, provides useful information about various features and phenomena, especially plants. Techniques we deal with are implemented through digital analysis of images. it does not mean that visual interpretation of satellite images is not useful, but it can be highly valuable, and information can be extracted through common visual interpretation methods such as color, tone, size, shape, figure and texture of image.