161 search results - page 14 / 33 » Robust shadow and illumination estimation using a mixture mo... |
PCM
2004
Springer
14 years 26 days ago
2004
Springer
Abstract. In this paper, a new sign-wise tied mixture HMM (SWTMHMM) is proposed and applied in vision-based sign language recognition (SLR). In the SWTMHMM, the mixture densities o...
ICCV
2003
IEEE
14 years 9 months ago
2003
IEEE
We derive a new class of photometric invariants that can be used for a variety of vision tasks including lighting invariant material segmentation, change detection and tracking, a...
FGR
2008
IEEE
13 years 9 months ago
2008
IEEE
Illumination invariance remains the most researched, yet the most challenging aspect of automatic face recognition. In this paper we investigate the discriminative power of colour...
ICIP
2002
IEEE
14 years 9 months ago
2002
IEEE
In this paper we evaluate the effectiveness of two likelihood normalization techniques, the Background Model Set (BMS) and the Universal Background Model (UBM), for improving perf...
AMFG
2005
IEEE
14 years 1 months ago
2005
IEEE
We propose a simplified and practical computational technique for estimating directional lighting in uncalibrated images of faces in frontal pose. We show that this inverse probl...