Title :
Vector quantisation of image sequences using variable size and variable shape blocks
Author :
Corte-Real, L. ; Alves, A.P.
Author_Institution :
Dept. de Engenharia Electrotecnica e Computadores, Porto Univ., Portugal
Abstract :
An algorithm for coding image sequences based on the segmentation of the differential image into variable size and variable shape blocks is described. The differential image is split into 4*4 blocks, that are grouped to form square and rectangular macro blocks of several areas. Each macro block is then vector quantised. Simulation results presented show that compression rates and subjective quality compare favorably with methods previously described.
Keywords :
encoding; picture processing; coding; compression rates; differential image; image processing; image sequences; rectangular macro blocks; segmentation; simulation; square macro blocks; variable shape blocks; vector quantisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900952
