Spatially varying white balancing for mixed and non-uniform illuminants
- URL: http://arxiv.org/abs/2109.01350v1
- Date: Fri, 3 Sep 2021 07:26:11 GMT
- Title: Spatially varying white balancing for mixed and non-uniform illuminants
- Authors: Teruaki Akazawa, Yuma Kinoshita and Hitoshi Kiya
- Abstract summary: We propose a novel white balance adjustment, called "spatially varying white balancing," for single, mixed, and non-uniform illuminants.
In an experiment, the effectiveness of the proposed method is shown under mixed and non-uniform illuminants, compared with conventional white and multi-color balancing.
- Score: 19.723551683930772
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this paper, we propose a novel white balance adjustment, called "spatially
varying white balancing," for single, mixed, and non-uniform illuminants. By
using n diagonal matrices along with a weight, the proposed method can reduce
lighting effects on all spatially varying colors in an image under such
illumination conditions. In contrast, conventional white balance adjustments do
not consider the correcting of all colors except under a single illuminant.
Also, multi-color balance adjustments can map multiple colors into
corresponding ground truth colors, although they may cause the rank deficiency
problem to occur as a non-diagonal matrix is used, unlike white balancing. In
an experiment, the effectiveness of the proposed method is shown under mixed
and non-uniform illuminants, compared with conventional white and multi-color
balancing. Moreover, under a single illuminant, the proposed method has almost
the same performance as the conventional white balancing.
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