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Comments on "modified K-means algorithm for vector quantizer design"

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2 Author(s)
Paliwal, K.K. ; Sch. of Microelectron. Eng., Griffith Univ., Brisbane, Qld., Australia ; Ramasubramanian, V.

Previously a modified K-means algorithm for vector quantization design has been proposed where the codevector updating step is as follows: new codevector=current codevector+scale factor (new centroid-current codevector). This algorithm uses a fixed value for the scale factor. In this paper, we propose the use of a variable scale factor which is a function of the iteration number. For the vector quantization of image data, we show that it offers faster convergence than the modified K-means algorithm with a fixed scale factor, without affecting the optimality of the codebook.

Published in:

Image Processing, IEEE Transactions on  (Volume:9 ,  Issue: 11 )

Date of Publication:

Nov. 2000

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