Matches in SemOpenAlex for { <https://semopenalex.org/work/W188081660> ?p ?o ?g. }
Showing items 1 to 91 of
91
with 100 items per page.
- W188081660 abstract "This thesis introduces a coding scheme for very low bitrate video coding through the aid of principal component analysis. Principal information of the facial mimic for a person can be extracted and stored in an Eigenspace. Entire video frames of this persons face can then be compressed with the Eigenspace to only a few projection coefficients. Principal component video coding encodes entire frames at once and increased frame size does not increase the necessary bitrate for encoding, as standard coding schemes do. This enables video communication with high frame rate, spatial resolution and visual quality at very low bitrates. No standard video coding technique provides these four features at the same time. Theoretical bounds for using principal components to encode facial video sequences are presented. Two different theoretical bounds are derived. One that describes the minimal distortion when a certain number of Eigenimages are used and one that describes the minimum distortion when a minimum number of bits are used. We investigate how the reconstruction quality for the coding scheme is affected when the Eigenspace, mean image and coefficients are compressed to enable efficient transmission. The Eigenspace and mean image are compressed through JPEG-compression while the while the coefficients are quantized. We show that high compression ratios can be used almost without any decrease in reconstruction quality for the coding scheme. Different ways of re-using the Eigenspace for a person extracted from one video sequence to encode other video sequences are examined. The most important factor is the positioning of the facial features in the video frames. Through a user test we find that it is extremely important to consider secondary workloads and how users make use of video when experimental setups are designed." @default.
- W188081660 created "2016-06-24" @default.
- W188081660 creator A5047886846 @default.
- W188081660 creator A5067512153 @default.
- W188081660 date "2006-01-01" @default.
- W188081660 modified "2023-09-22" @default.
- W188081660 title "Re-use of Eigenspaces to encode new facial video sequences" @default.
- W188081660 hasPublicationYear "2006" @default.
- W188081660 type Work @default.
- W188081660 sameAs 188081660 @default.
- W188081660 citedByCount "0" @default.
- W188081660 crossrefType "journal-article" @default.
- W188081660 hasAuthorship W188081660A5047886846 @default.
- W188081660 hasAuthorship W188081660A5067512153 @default.
- W188081660 hasConcept C104317684 @default.
- W188081660 hasConcept C105795698 @default.
- W188081660 hasConcept C11413529 @default.
- W188081660 hasConcept C115961682 @default.
- W188081660 hasConcept C13481523 @default.
- W188081660 hasConcept C153180895 @default.
- W188081660 hasConcept C154945302 @default.
- W188081660 hasConcept C175732694 @default.
- W188081660 hasConcept C179518139 @default.
- W188081660 hasConcept C185592680 @default.
- W188081660 hasConcept C190750250 @default.
- W188081660 hasConcept C198751489 @default.
- W188081660 hasConcept C202474056 @default.
- W188081660 hasConcept C23431618 @default.
- W188081660 hasConcept C27438332 @default.
- W188081660 hasConcept C31972630 @default.
- W188081660 hasConcept C33923547 @default.
- W188081660 hasConcept C41008148 @default.
- W188081660 hasConcept C55493867 @default.
- W188081660 hasConcept C57273362 @default.
- W188081660 hasConcept C65483669 @default.
- W188081660 hasConcept C66746571 @default.
- W188081660 hasConcept C69216139 @default.
- W188081660 hasConcept C78548338 @default.
- W188081660 hasConcept C9417928 @default.
- W188081660 hasConceptScore W188081660C104317684 @default.
- W188081660 hasConceptScore W188081660C105795698 @default.
- W188081660 hasConceptScore W188081660C11413529 @default.
- W188081660 hasConceptScore W188081660C115961682 @default.
- W188081660 hasConceptScore W188081660C13481523 @default.
- W188081660 hasConceptScore W188081660C153180895 @default.
- W188081660 hasConceptScore W188081660C154945302 @default.
- W188081660 hasConceptScore W188081660C175732694 @default.
- W188081660 hasConceptScore W188081660C179518139 @default.
- W188081660 hasConceptScore W188081660C185592680 @default.
- W188081660 hasConceptScore W188081660C190750250 @default.
- W188081660 hasConceptScore W188081660C198751489 @default.
- W188081660 hasConceptScore W188081660C202474056 @default.
- W188081660 hasConceptScore W188081660C23431618 @default.
- W188081660 hasConceptScore W188081660C27438332 @default.
- W188081660 hasConceptScore W188081660C31972630 @default.
- W188081660 hasConceptScore W188081660C33923547 @default.
- W188081660 hasConceptScore W188081660C41008148 @default.
- W188081660 hasConceptScore W188081660C55493867 @default.
- W188081660 hasConceptScore W188081660C57273362 @default.
- W188081660 hasConceptScore W188081660C65483669 @default.
- W188081660 hasConceptScore W188081660C66746571 @default.
- W188081660 hasConceptScore W188081660C69216139 @default.
- W188081660 hasConceptScore W188081660C78548338 @default.
- W188081660 hasConceptScore W188081660C9417928 @default.
- W188081660 hasLocation W1880816601 @default.
- W188081660 hasOpenAccess W188081660 @default.
- W188081660 hasPrimaryLocation W1880816601 @default.
- W188081660 hasRelatedWork W1561969483 @default.
- W188081660 hasRelatedWork W1580846403 @default.
- W188081660 hasRelatedWork W1944161161 @default.
- W188081660 hasRelatedWork W2024181688 @default.
- W188081660 hasRelatedWork W2050579244 @default.
- W188081660 hasRelatedWork W2066776146 @default.
- W188081660 hasRelatedWork W2125337783 @default.
- W188081660 hasRelatedWork W2150385490 @default.
- W188081660 hasRelatedWork W2251081219 @default.
- W188081660 hasRelatedWork W2347506105 @default.
- W188081660 hasRelatedWork W247022986 @default.
- W188081660 hasRelatedWork W2747419249 @default.
- W188081660 hasRelatedWork W2788537439 @default.
- W188081660 hasRelatedWork W2898882361 @default.
- W188081660 hasRelatedWork W2992051623 @default.
- W188081660 hasRelatedWork W3023200103 @default.
- W188081660 hasRelatedWork W3048895176 @default.
- W188081660 hasRelatedWork W2772208084 @default.
- W188081660 hasRelatedWork W2795636184 @default.
- W188081660 hasRelatedWork W3149219702 @default.
- W188081660 isParatext "false" @default.
- W188081660 isRetracted "false" @default.
- W188081660 magId "188081660" @default.
- W188081660 workType "article" @default.