Title :
Adaptive directional zerotree image coding
Author :
Jirachawang, Suksan ; Areekul, Vutipong
Author_Institution :
Manuf. Autom. Sect., Nat. Electron. & Comput. Technol. Center, Pathumthani, Thailand
Abstract :
In this paper, adaptive directional zerotree image coding is introduced. This modified SPIHT algorithm called adaptive directional SPIRT (ADSPIHT) exploits an appropriate quadtree structure in order to take advantage from horizontal and vertical edge encoding in separable wavelet transform. Moreover, this adaptive algorithm changes structure in order to enhance energy compaction without increasing side information rate. Compared to SPIRT and DSPIHT, ADSPIHT improves coding performance in PSNR, especially in images with highly vertical and horizontal edges.
Keywords :
adaptive codes; image coding; quadtrees; wavelet transforms; adaptive directional SPIRT; adaptive directional zerotree image coding; coding performance; energy compaction enhancement; highly horizontal edges; highly vertical edges; horizontal edge encoding; modified SPIHT algorithm; quadtree structure; separable wavelet transform; side information rate; vertical edge encoding; Arithmetic; Compaction; Computer aided manufacturing; Degradation; Energy capture; Energy resolution; Image coding; Manufacturing automation; PSNR; Wavelet transforms;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1206000
