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Image Manipulation

  • Ronald R. Price

Abstract

Much of what is now known about image manipulation and image processing theory has been developed by those early researchers concerned with electrical signal processing.8.1–8.7 Images, when converted to electrical signals, were soon recognized to be a potentially fertile area for the extension of signal processing techniques. Early on, image processing was carried out on “analog” signals as opposed to numbers in a digital computer. Analog image processing was often performed using optical techniques or through the use of specially built electronic circuits which could perform specified functions. The term analog refers to systems and processes in which signals with uniform and continuous variations are manipulated. The term digital refers to systems and processes which involve manipulation of discrete numbers. Even in the case of digital images, the image information must, at some stage or another, be in the form of an analog signal. To create the digital image, the analog signal must be converted to discrete numbers and stored in a computer memory. This conversion process is called analog-to-digital conversion (ADC).

Keywords

Spatial Frequency Gray Level Modulation Transfer Function High Spatial Frequency Image Manipulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1993

Authors and Affiliations

  • Ronald R. Price

There are no affiliations available

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