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Träfflista för sökning "WFRF:(Johansson Kenneth) ;conttype:(refereed);srt2:(2000-2004)"

Search: WFRF:(Johansson Kenneth) > Peer-reviewed > (2000-2004)

  • Result 1-10 of 17
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  • Ahuja, Rajeev, et al. (author)
  • Optical properties of 4H-SiC
  • 2002
  • In: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 91:4, s. 2099-2103
  • Journal article (peer-reviewed)abstract
    • The optical band gap energy and the dielectric functions of n-type 4H-SiC have been investigated experimentally by transmission spectroscopy and spectroscopic ellipsometry and theoretically by an ab initio full-potential linear muffin-tin-orbital method. We present the real and imaginary parts of the dielectric functions, resolved into the transverse and longitudinal photon moment a, and we show that the anisotropy is small in 4H-SiC. The measurements and the calculations fall closely together in a wide range of energies.
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  • Andersson, Kenneth, 1970-, et al. (author)
  • Backward-forward motion compensated prediction
  • 2002
  • In: Proceedings of ACIVS 2002 (Advanced Concepts for Intelligent Vision Systems), Ghent, Belgium, September 9-11, 2002. ; , s. 260-267
  • Conference paper (peer-reviewed)abstract
    • This paper presents new methods for use of dense motion fields for motion compensation of interlaced video. The motion is estimated using previously decoded field-images. An initial motion compensated prediction is produced using the assumption that the motion is predictable in time. The motion estimation algorithm is phase-based and uses two or three field-images to achieve motion estimates with sub-pixel accuracy. To handle non-constant motion and the specific characteristics of the field-image to be coded, the initially predicted image is refined using forward motion compensation, based on block-matching. Tests show that this approach achieves higher PSNR than forward block-based motion estimation, when coding the residual with the same coder. The subjective performance is also better.
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  • Andersson, Kenneth, 1970-, et al. (author)
  • Motion compensation using backward prediction and prediction refinement
  • 2003
  • In: Signal Processing: Image Communication. - 0923-5965. ; 18:5, s. 381-400
  • Journal article (peer-reviewed)abstract
    • This paper presents new methods for use of dense motion fields for motion compensation of interlaced video. The motion estimation is based on previously decoded field-images. The motion is then temporally predicted and used for motion compensated prediction of the field-image to be coded. The motion estimation algorithm is phase-based and uses two or three field-images to achieve motion estimates with sub-pixel accuracy. To handle non-constant motion and the specific characteristics of the field-image to be coded, the initially predicted image is refined using forward motion compensation, based on block-matching. Tests show that this approach achieves higher PSNR than forward block-based motion estimation, when coding the residual with the same coder. The subjective performance is also better.
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  • Result 1-10 of 17
Type of publication
journal article (13)
conference paper (2)
book chapter (2)
Type of content
peer-reviewed  (17)Undo refine
Author/Editor
Abrahamsson, Kenneth (6)
Abrahamsson, Lena (6)
Johansson, Jan (6)
Johansson, Peter (2)
Knutsson, Hans, 1950 ... (2)
Järrendahl, Kenneth (2)
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Forchheimer, Robert, ... (2)
Andersson, Kenneth, ... (2)
Söderhäll, Kenneth (2)
Eriksson, D. (1)
Hultman, Lars (1)
Johansson, A (1)
Hellgren, N. (1)
Persson, Clas (1)
Johansson, Börje (1)
Wadström, Torkel (1)
Liuba, Petru (1)
Pesonen, Erkki (1)
Keller, U (1)
Holsánová, Jana (1)
Ahuja, Rajeev (1)
Eriksson, David (1)
Persson, Anders (1)
Wahlström, Claes-Gör ... (1)
Olafsson, S. (1)
Holmqvist, Kenneth (1)
Wang, HY (1)
Osorio-Guillen, J. M ... (1)
da Silva, A. F. (1)
Pepe, I. (1)
Lindquist, O.P.A. (1)
Edwards, N. V. (1)
Wahab, Qamar Ul (1)
Laurini, Ricardo (1)
Johansson, Bengt (1)
Johansson, Victoria (1)
Johansson, Leif (1)
Strömqvist, Sven (1)
Gaarde, Mette (1)
L'Huillier, Anne (1)
Mauritsson, Johan (1)
Ullén, Anders (1)
Hultmark, Dan (1)
HOLM, P (1)
Johansson, Ann (1)
Andersson, Mats, 196 ... (1)
Cerenius, Lage (1)
Stigbrand, T. (1)
Persson, Kenneth (1)
Huang, TS (1)
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University
Luleå University of Technology (6)
Linköping University (4)
Lund University (4)
Uppsala University (2)
Umeå University (1)
Royal Institute of Technology (1)
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Stockholm University (1)
Karlstad University (1)
Karolinska Institutet (1)
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Language
English (13)
German (1)
French (1)
Spanish (1)
Portuguese (1)
Research subject (UKÄ/SCB)
Engineering and Technology (7)
Natural sciences (2)
Medical and Health Sciences (1)
Social Sciences (1)
Humanities (1)

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