Software techniques for image processing

Astronomy and Astrophysics – Astronomy

Scientific paper

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Computer Programs, Computer Techniques, Image Enhancement, Signal Processing, Systems Engineering, Display Devices, Fourier Analysis, Histograms, Image Contrast, Man Machine Systems, Minicomputers

Scientific paper

The present paper describes several software techniques that can be used to get the 'most' out of an image without destroying or adding any information. A simple overview is given of a general image-processing system, a number of systems in current use are listed, and three types of processing tasks are delineated: image diagnostics, subjective enhancement, and quantitative restoration. Examples of each of these types are discussed in some detail, including histogram, differences, and Fourier analysis for image diagnostics; contrast stretching, edge enhancement, and pseudocolor displays for subjective enhancement; and photometric correction, contouring, and geometric correction for quantitative restoration.

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