TY - JOUR
T1 - An RBF-based compression method for image-based relighting
AU - Leung, Chi-Sing
AU - Wong, Tien-Tsin
AU - Lam, Ping-Man
AU - Choy, Kwok-Hung
PY - 2006/4
Y1 - 2006/4
N2 - In image-based relighting, a pixel is associated with a number of sampled radiance values. This paper presents a two-level compression method. In the first level, the plenoptic property of a pixel is approximated by a spherical radial basis function (SRBF) network. That means that the spherical plenoptic function of each pixel is represented by a number of SRBF weights. In the second level, we apply a wavelet-based method to compress these SRBF weights. To reduce the visual artifact due to quantization noise, we develop a constrained method for estimating the SRBF weights. Our proposed approach is superior to JPEG, JPEG2000, and MPEG. Compared with the spherical harmonics approach, our approach has a lower complexity, while the visual quality is comparable. The real-time rendering method for our SRBF representation is also discussed. © 2006 IEEE.
AB - In image-based relighting, a pixel is associated with a number of sampled radiance values. This paper presents a two-level compression method. In the first level, the plenoptic property of a pixel is approximated by a spherical radial basis function (SRBF) network. That means that the spherical plenoptic function of each pixel is represented by a number of SRBF weights. In the second level, we apply a wavelet-based method to compress these SRBF weights. To reduce the visual artifact due to quantization noise, we develop a constrained method for estimating the SRBF weights. Our proposed approach is superior to JPEG, JPEG2000, and MPEG. Compared with the spherical harmonics approach, our approach has a lower complexity, while the visual quality is comparable. The real-time rendering method for our SRBF representation is also discussed. © 2006 IEEE.
KW - Constrained least-square fitting
KW - Image-based relighting (IBR)
KW - Plenoptic illumination function (PIF)
KW - Spherical radial basis function (SRBF)
KW - Wavelet transform
UR - http://www.scopus.com/inward/record.url?scp=33645160001&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-33645160001&origin=recordpage
U2 - 10.1109/TIP.2005.863936
DO - 10.1109/TIP.2005.863936
M3 - RGC 21 - Publication in refereed journal
C2 - 16579387
SN - 1057-7149
VL - 15
SP - 1031
EP - 1041
JO - IEEE Transactions on Image Processing
JF - IEEE Transactions on Image Processing
IS - 4
ER -