Minimal Von Kries illuminant invariance

Brill, Michael H.

doi:10.1002/col.20420

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…Although this model is merely an estimate of the illumination of light source, and may not accurately able to demonstrate the photometric changes. However, it may also be accepted as color correction model [21] [22] [23] [24] [25] and it enhances a lot of color constancy algorithms. Diagonal mapping used throughout this paper creates the output images after correction of the color constancy algorithm, where a perfect white light, which(…”

Section: Review Of Color Constancymentioning

confidence: 99%

Investigation of Color Constancy for Ubiquitous Wireless LAN/Camera Positioning: An Initial Outcome

Bejuri

Mohamad²,

Sapri³

et al. 2012

IJACT

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This paper present our color constancy investigation in the hybridization of Wireless LAN and Camera positioning in the mobile phone. Five typical color constancy schemes are analyzed in different location environment. The results can be used to combine with RF signals from Wireless LAN positioning by using model fitting approach in order to establish absolute positioning output. There is no conventional searching algorithm required, thus it is expected to reduce the complexity of computation. Finally we present our preliminary results to illustrate the indoor positioning algorithm performance evaluation for an indoor environment set-up.

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Section: Review Of Color Constancymentioning

confidence: 99%

Investigation of Color Constancy for Ubiquitous Wireless LAN/Camera Positioning: An Initial Outcome

Bejuri

Mohamad²,

Sapri³

et al. 2012

IJACT

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show abstract

“…where Although this model is merely an approximation of illuminant change, and may not model photometric changes accurately, it is widely accepted as a colour correction model [16,[26][27][28][29] and underpins many colour constancy algorithms, e.g. GW [7] and GM [15].…”

Section: Introductionmentioning

confidence: 99%

Natural image illuminant estimation via deep non‐negative matrix factorisation

Liu

Zhong

Dong

2018

IET Image Processing

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“…Less effort has been devoted to the problem of what use can be made of the cone responses to the illuminant if they are available. Generally, the approach has been to use them to derive a linear—usually diagonal [ 23 – 27 ]—transformation of the cone excitation space that is expected to model the effect of the illuminant on the cone excitations. More specifically, the cone excitations obtained from an object lit by daylight, or some other “canonical” light, are taken to represent the “true” colour of the object.…”

Section: Introductionmentioning

confidence: 99%

Rethinking Colour Constancy

et al. 2015

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Colour constancy needs to be reconsidered in light of the limits imposed by metamer mismatching. Metamer mismatching refers to the fact that two objects reflecting metameric light under one illumination may reflect non-metameric light under a second; so two objects appearing as having the same colour under one illuminant can appear as having different colours under a second. Yet since Helmholtz, object colour has generally been believed to remain relatively constant. The deviations from colour constancy registered in experiments are usually thought to be small enough that they do not contradict the notion of colour constancy. However, it is important to determine how the deviations from colour constancy relate to the limits metamer mismatching imposes on constancy. Hence, we calculated metamer mismatching’s effect for the 20 Munsell papers and 8 pairs of illuminants employed in the colour constancy study by Logvinenko and Tokunaga and found it to be so extensive that the two notions—metamer mismatching and colour constancy—must be mutually exclusive. In particular, the notion of colour constancy leads to some paradoxical phenomena such as the possibility of 20 objects having the same colour under chromatic light dispersing into a hue circle of colours under neutral light. Thus, colour constancy refers to a phenomenon, which because of metamer mismatching, simply cannot exist. Moreover, it obscures the really important visual phenomenon; namely, the alteration of object colours induced by illumination change. We show that colour is not an independent, intrinsic attribute of an object, but rather an attribute of an object/light pair, and then define a concept of material colour in terms of equivalence classes of such object/light pairs. We suggest that studying the shift in material colour under a change in illuminant will be more fruitful than pursuing colour constancy’s false premise that colour is an intrinsic attribute of an object.

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Minimal Von Kries illuminant invariance

Cited by 8 publications

References 6 publications

Investigation of Color Constancy for Ubiquitous Wireless LAN/Camera Positioning: An Initial Outcome

Investigation of Color Constancy for Ubiquitous Wireless LAN/Camera Positioning: An Initial Outcome

Natural image illuminant estimation via deep non‐negative matrix factorisation

Rethinking Colour Constancy

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