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 |