49843608-Complete-thesis-Report-merged

# Matlab is therefore built upon a foundation of

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courses in matrix theory, linear algebra, and numerical analysis. MATLAB is therefore built upon a foundation of sophisticated matrix software, in which the basic data element is a matrix that does not require pre dimensioning. MATLAB is a product of The Math works,Inc. and is an advanced interactive software package specially designed for scientific and engineering computation. The MATLAB environment integrates graphic

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31 illustations with precise numerical calculations, and is a powerful, easy-to-use, and comprehensive tool for performing all kinds of computations and scientific data visualization. MATLAB has proven to be a very flexible and usable tool for technical computing. It integrates computation, visualization, and programming in an easy-to-use environment where problems and solutions are expressed in familiar mathematical notation. Typical use includes: - Math and computation -Algorithm development -Modeling, simulation, and prototyping -Data analysis, exploration, and visualization -Scientific and engineering graphics -Application development, including graphical user interface building.
32 Chapter- 3 Problem Statement Whenever an image is converted from one form to another such as, digitizing, scanning, transmitting, storing, etc., some of the degradation occurs at the output. Hence, the output image has to undergo a process called image enhancement which consists of a collection of techniques that seek to improve the visual appearance of an image. In the image if the local region is somewhat smooth, then the new value of the pixel can be determined by averaging neighboring pixel values. On the other hand, if the local region contains edges a different type of enhancement method should be used. However, it is extremely hard, if not impossible, to set the conditions under which a certain enhancement method should be selected, since the local conditions can be evaluated only vaguely in some portions of an image, therefore, an enhance method needs to be capable of reasoning with vague and uncertain information; this suggests the use of fuzzy logic. In this thesis work a technique is designed by using Fuzzy Inference System in MATLAB 7.5 (is the process of mapping from a given input to an output using fuzzy logic). Objectives: To study the existing enhancement methods in spatial, frequency domain and fuzzy domain methods. To design the technique using FIS (Fuzzy Inference System) to improve the image contrast. Implement it in MATLAB 7.5 Test the designed technique using some degraded, low contrasted images.

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33 This designed technique is able to improve contrast of the image as compare to Thresholding method, Histogram Equalization, Gaussian Low-pass Filter and Spatial Averaging Filter. An algorithm is proposed and implemented to enhance image using fuzzy technique. This algorithm is used to convert the image properties into fuzzy data and fuzzy data into defuzzification.
34 Chapter-4 Design and Implementation Fuzzy inference system is the process of formulating the mapping from a given input to an output using fuzzy logic. The mapping then provides a basis from which decisions can

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