Titlebook: Introduction to Image Processing; André Marion Book 1991 Springer Science+Business Media Dordrecht 1991 filtering.function.image processin

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Basic techniques of digital image processing,The term “basic techniques” is used to include all the . which can be carried out on an analogue or digital image.

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Linear processing of signals and images,Figure IX. 1 reminds us of the basic properties of a two-dimensional continuous linear filter, characterised by its impulse response R(.) or its transfer function G(.), both of which are Fourier transforms.

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The image as an analogue signal,presented by a function .(.) of the two spatial variables . and . (fig.0.1). We shall call this a two-dimensional signal and write it as .(.). In introducing the concept of an image frequency spectrum (also known as a Fourier spectrum), we shall first consider the simpler case of a signal in one dimension, that is a function of a single variable.

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978-0-442-31202-2Springer Science+Business Media Dordrecht 1991