Adaptive compression of slowly varying images transmitted over wireless sensor networks

dc.contributor.author	Νικολακόπουλος, Γεώργιος	el
dc.contributor.author	Κανδρής, Διονύσιος-Ξενοφών	el
dc.contributor.author	Τζες, Αντώνης, Π.	el
dc.date.accessioned	2015-06-07T12:20:34Z
dc.date.available	2015-06-07T12:20:34Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15459
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.mdpi.com/	en
dc.subject	Adaptive image compression
dc.subject	Control over networks
dc.subject	Quad tree decomposition
dc.subject	Wireless multimedia sensor networks
dc.subject	Προσαρμοστική συμπίεση εικόνας
dc.subject	έλεγχος των δικτύων
dc.subject	Ασύρματα δίκτυα αισθητήρων πολυμέσων
dc.title	Adaptive compression of slowly varying images transmitted over wireless sensor networks	en
heal.type	journalArticle
heal.classification	Technology
heal.classification	Electrical engineering
heal.classification	Τεχνολογία
heal.classification	Ηλεκτρολογία Μηχανολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://zbw.eu/stw/descriptor/18426-4
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Ηλεκτρολογία Μηχανολογία
heal.identifier.secondary	DOI: 10.3390/s100807170
heal.language	en
heal.access	campus
heal.publicationDate	2010-08
heal.bibliographicCitation	NIKOLAKOPOULOS, G., KANDRIS, D.-X. & TZES, A.P. (2010). Adaptive compression of slowly varying images transmitted over wireless sensor networks. Sensors. [online] 10 (8). p. 7170-7191. Available from: http://www.mdpi.com/	en
heal.abstract	In this article a scheme for image transmission over Wireless Sensor Networks (WSN) with an adaptive compression factor is introduced. The proposed control architecture affects the quality of the transmitted images according to: (a) the traffic load within the network and (b) the level of details contained in an image frame. Given an approximate transmission period, the adaptive compression mechanism applies Quad Tree Decomposition (QTD) with a varying decomposition compression factor based on a gradient adaptive approach. For the initialization of the proposed control scheme, the desired a priori maximum bound for the transmission time delay is being set, while a tradeoff among the quality of the decomposed image frame and the time needed for completing the transmission of the frame should be taken under consideration. Based on the proposed control mechanism, the quality of the slowly varying transmitted image frames is adaptively deviated based on the measured time delay in the transmission. The efficacy of the adaptive compression control scheme is validated through extended experimental results.	en
heal.publisher	MDPI	en
heal.journalName	Sensors	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true