Browsing by Author "Hepburn, John Stuart Andrew"

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    Techniques in image restoration and enhancement
    (1975) Hepburn, John Stuart Andrew
    Image processing in its broad sense pervades many areas but it is convenient to group it into three main sections, viz: image coding, usually for image transmission over telecommunication links; pattern recognition for detecting the presence of a particular distribution in an image which is generally corrupted to some extent by noise; and image restoration, which aims to recover a faithful reproduction of a perfect image which has been degraded, and image enhancement which attempts to present an image in a form which will convey most readily the desired information to the human brain and takes account of the characteristics of vision. It is the object of this thesis to investigate some of the techniques of image restoration and enhancement. There are many different media for implementing the various processes, but digital computation and coherent optics are prevalent.