Title :
Improving the performance of the quadtree-based image approximation via the generalised DCT
Author :
Wu, H.-S. ; King, R.A. ; Kitney, R.I.
Author_Institution :
Imperial Coll. of Sci. Technol. & Med., London, UK
fDate :
5/13/1993 12:00:00 AM
Abstract :
An algorithm is presented to improve the performance of the quadtree-based image approximation using the generalised discrete cosine transform. The results show that the number of coefficients for the approximation can be further reduced remarkably while the approximation error increases only slightly.
Keywords :
approximation theory; discrete cosine transforms; image coding; approximation error; coefficients; discrete cosine transform; generalised DCT; quadtree-based image approximation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930592
