منابع مشابه
Illuminant spectrum estimation at a pixel.
In this paper, an algorithm is proposed to estimate the spectral power distribution of a light source at a pixel. The first step of the algorithm is forming a two-dimensional illuminant invariant chromaticity space. In estimating the illuminant spectrum, generalized inverse estimation and Wiener estimation methods were applied. The chromaticity space was divided into small grids and a weight ma...
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The illuminant estimation has an important role in many domain applications such as digital still cameras and mobile phones, where the final image quality could be heavily affected by a poor compensation of the ambient illumination effects. In this paper we present an algorithm, not dependent on the acquiring device, for illuminant estimation and compensation directly in the color filter array ...
متن کاملChromatic Adaptation and Illuminant Estimation
Chromatic Adaptation is the ability of the human visual system to approximately preserve the appearance of an object color, no matter which light “color” illuminates a particular scene. We perceive a white piece of paper as white, regardless whether viewed under a bluish daylight or yellowish tungsten light source. Similar effects can be observed with other color hues. Figure 1 illustrates this...
متن کاملIlluminant estimation as cue combination.
This work briefly describes a model for illuminant estimation based on combination of candidate illuminant cues. Many of the research issues concerning cue combination in depth and shape perception translate well to the study of surface color perception. I describe and illustrate a particular experimental approach (perturbation analysis) employed in the study of depth and shape that is useful i...
متن کاملA Unified Framework for Scene Illuminant Estimation
Most illuminant estimation algorithms work with the assumption of one specific type of the light source (e.g. point light source or directional light source). This assumption brings up two main limitations which significantly restrict the applicability of the algorithms: First, the knowledge about the type of the light source presented in the scene is needed a priori; second, it can not handle ...
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ژورنال
عنوان ژورنال: Journal of the Optical Society of America A
سال: 2011
ISSN: 1084-7529,1520-8532
DOI: 10.1364/josaa.28.000696