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Nonuniform image representation in area-of-interest systems

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2 Author(s)
Peterfreund, N. ; Armament Dev. Authority, Haifa, Israel ; Zeevi, Y.Y.

This paper is concerned with image representation by data distributed nonuniformly and in particular with a representation scheme suitable for “area-of-interest” imaging. The class of signals under consideration, whose information density varies with position, can be represented according to a nonuniform sampling scheme. Position-varying projection operators are presented as simple low-pass filtering operations in a Fourier-like domain. Sequential projections are used for pyramidal representation of nonuniformly sampled images. It is shown that irregular random sampling, prevents, under certain mild restrictions, aliasing effects

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Image Processing, IEEE Transactions on  (Volume:4 ,  Issue: 9 )