Abstract: A new method of vector classification,referring to the image compression algorithm based on wavelet transformation and vector quantization,is presented.It utilizes direction and correlation between wavelet coefficients.The threshold selection is based on reordered wavelet coefficients series.Experimental results demonstrate that the principle of this method is simple and available.This method has good stability in classifying different images and improves the efficiency of the image compression ...

Key words: wavelet transformation； vector classification； threshold selection；