Low bit-rate coding of image sequences using adaptive regions of interest

Doulamis, N; Doulamis, A; Kalogeras, D; Kollias, S

dc.contributor.author	Doulamis, N	en
dc.contributor.author	Doulamis, A	en
dc.contributor.author	Kalogeras, D	en
dc.contributor.author	Kollias, S	en
dc.date.accessioned	2014-03-01T01:13:53Z
dc.date.available	2014-03-01T01:13:53Z
dc.date.issued	1998	en
dc.identifier.issn	1051-8215	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12762
dc.subject	Low bit-rate coding	en
dc.subject	MC-DCT-based coding schemes	en
dc.subject	Neural networks	en
dc.subject	Regions of interest	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	COMPRESSION	en
dc.title	Low bit-rate coding of image sequences using adaptive regions of interest	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/76.736718	en
heal.identifier.secondary	http://dx.doi.org/10.1109/76.736718	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	An adaptive algorithm for extracting foreground objects from background in videophone or videoconference applications is presented in this paper. The algorithm uses a neural network architecture that classifies the video frames in regions-of-interest (ROI) and non-ROI areas, also being able to automatically adapt its performance to scene changes. The algorithm is incorporated in motion-compensated discrete cosine transform (MC-DCT)-based coding schemes, allocating more bits to ROI than to non-ROI areas. Simulation results are presented, using the Claire and Trevor sequences, which show reconstructed images of better quality, as well as signal-to-noise ratio improvements of about 1.4 dB, compared to those achieved by standard MC-DCT encoders. © 1998 IEEE.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Circuits and Systems for Video Technology	en
dc.identifier.doi	10.1109/76.736718	en
dc.identifier.isi	ISI:000077934000002	en
dc.identifier.volume	8	en
dc.identifier.issue	8	en
dc.identifier.spage	928	en
dc.identifier.epage	934	en