Record: 166
   RECORD NO.:  2911323 INSPEC Abstract No: A87080843
       AUTHOR:  Thornton, W.A.
  CORP SOURCE:  Prime-Color Inc., Cranford, NJ, USA
        TITLE:  Improving color constancy of object colors
       SOURCE:  Color Research & Application, vol.11, no.4, p. 278-86
         ISSN:  0361-2317
        CODEN:  CREADU
PLACE OF PUBL:  USA
TRANSLATED IN:  A04
     LANGUAGE:  English
         YEAR:  Winter 1986
 COPYRIGHT NO:  0361-2317/86/040278-09$04.00
    TREATMENT:  X Experimental
  RECORD TYPE:  Journal Paper
     ABSTRACT:  In a study of improving the color constancy of object 
                colors, the spectral reflectances of the eight CIE color-
                rendering test samples (Munsell painted papers) were chosen 
                as reference reflectance distributions. Many other 
                distributions, more highly structured than those of the 
                reference set, were synthesized by computer so as to be 
                rendered by illuminant D/sub 65/ at the chromaticity at 
                which one or another of the CIE-Munsell samples is rendered 
                by D/sub 65/. The chromaticities, at which each of the 
                synthesized reflectances is rendered by each of 30 
                additional illuminants, define both dominant wavelength and 
                chroma vector for the resulting 50000 illuminant-sample 
                combinations. For most natural illuminants, and for present 
                commercial lamplights, color constancy is maximized by 
                synthesizing each sample reflectance from three relatively 
                narrow components, 50-60 nm at half height, peaking at 
                wavelengths near 450 nm, 530 nm, and 610 nm (10 Refs.)
  DESCRIPTORS:  colorimetry
  IDENTIFIERS:  color constancy; object colors; spectral reflectances; 
                reference; chromaticity; CIE-Munsell samples; chroma vector
  CLASS CODES:  A0760D (Photometry and radiometry)
 Record: 169
   RECORD NO.:  2817881 INSPEC Abstract No: A87028531
       AUTHOR:  Hsien-Che Lee
  CORP SOURCE:  Res. Labs., Eastman Kodak Co., Rochester, NY, USA
        TITLE:  Method for computing the scene-illuminant chromaticity from 
                specular highlights
       SOURCE:  Journal of the Optical Society of America A (Optics and 
                Image Science), vol.3, no.10, p. 1694-9
         ISSN:  0740-3232
        CODEN:  JOAOD6
PLACE OF PUBL:  USA
TRANSLATED IN:  B05
     LANGUAGE:  English
         YEAR:  Oct. 1986
    TREATMENT:  T Theoretical or Mathematical
  RECORD TYPE:  Journal Paper
     ABSTRACT:  The perception of an unchanging surface colour under 
                different illuminations requires the computation of the 
                scene-illuminant color either directly or indirectly. A 
                possible source for the computation is the specular 
                highlight of the surface reflection. Some issues related to 
                color constancy are discussed, and a theory for computing 
                the scene-illuminant chromaticity from specular highlight is 
                described. An interesting result of the theory of that in an 
                ideal situation, two surfaces of different colours will be 
                sufficient for the computation (23 Refs.)
  DESCRIPTORS:  colour vision; visual perception
  IDENTIFIERS:  colour vision; computation method; scene-illuminant 
                chromaticity; specular highlights; color constancy
  CLASS CODES:  A8710 (General, theoretical, and mathematical biophysics); 
                A8732N (Colour detection; adaptation and discrimination); 
                A8732S (Psychophysics of vision, visual perception, 
                binocular vision)
 Record: 172
   RECORD NO.:  2817877 INSPEC Abstract No: A87028529
       AUTHOR:  Brainard, D.H.; Wandell, B.A.
  CORP SOURCE:  Dept. of Psychol., Stanford Univ., CA, USA
        TITLE:  Analysis of the retinex theory of color vision
       SOURCE:  Journal of the Optical Society of America A (Optics and 
                Image Science), vol.3, no.10, p. 1651-61
         ISSN:  0740-3232
        CODEN:  JOAOD6
PLACE OF PUBL:  USA
TRANSLATED IN:  B01
     LANGUAGE:  English
         YEAR:  Oct. 1986
    TREATMENT:  T Theoretical or Mathematical
  RECORD TYPE:  Journal Paper
     ABSTRACT:  If color appearance is to be a useful feature in identifying 
                an object, then color appearance must remain roughly 
                constant when the object is viewed in different contexts. 
                People maintain approximate color constancy despite 
                variation in the color of nearby objects and despite 
                variation in the spectral power distribution of the ambient 
                light. Land's (1983) retinex algorithm is a model of human 
                color constancy. The authors analyze the retinex algorithm 
                and discuss its general properties. They show that the 
                algorithm is too sensitive to changes in the color of nearby 
                objects to serve as an adequate model of human color 
                constancy (33 Refs.)
  DESCRIPTORS:  colour vision; physiological models; visual perception
  IDENTIFIERS:  human colour constancy; colour vision; vision perception; 
                Land's retinex algorithm; retinex theory; spectral power 
                distribution
  CLASS CODES:  A8732N (Colour detection; adaptation and discrimination); 
                A8732S (Psychophysics of vision, visual perception, 
                binocular vision)
 Record: 174
   RECORD NO.:  2649322 INSPEC Abstract No: A86059929
       AUTHOR:  Maloney, L.T.; Wandell, B.A.
  CORP SOURCE:  Dept. of Psychol., Stanford Univ., CA, USA
        TITLE:  Color constancy: a method for recovering surface spectral 
                reflectance
       SOURCE:  Journal of the Optical Society of America A (Optics and 
                Image Science), vol.3, no.1, p. 29-33
         ISSN:  0740-3232
        CODEN:  JOAOD6
PLACE OF PUBL:  USA
TRANSLATED IN:  A06
     LANGUAGE:  English
         YEAR:  Jan. 1986
 COPYRIGHT NO:  0740-3232/86/010029-05$02.00
    TREATMENT:  T Theoretical or Mathematical
  RECORD TYPE:  Journal Paper
     ABSTRACT:  Human and machine visual sensing is enhanced when surface 
                properties of objects in scenes, including color, can be 
                reliably estimated despite changes in the ambient lighting 
                conditions. The authors describe a computational method for 
                estimating surface spectral reflectance when the spectral 
                power distribution of the ambient light is not known 
                (21 Refs.)
  DESCRIPTORS:  colour vision; visual perception
  IDENTIFIERS:  surface spectral reflectance; machine visual sensing; 
                lighting conditions
  CLASS CODES:  A8732N (Colour vision: detection, adaptation and 
                discrimination); A8732S (Psychophysics of vision, visual 
                perception, binocular vision)
 Record: 176
   RECORD NO.:  2513260 INSPEC Abstract No: A85103429
       AUTHOR:  Worthey, J.A.
  CORP SOURCE:  Illumination Eng. Group, NBS, Gaithersburg, MD, USA
        TITLE:  Limitations of color constancy
       SOURCE:  Journal of the Optical Society of America A (Optics and 
                Image Science), vol.2, no.7, p. 1014-26
         ISSN:  0740-3232
        CODEN:  JOAOD6
PLACE OF PUBL:  USA
TRANSLATED IN:  A02
     LANGUAGE:  English
         YEAR:  July 1985
 COPYRIGHT NO:  0740-3232/85/071014-13$02.00
    TREATMENT:  G General Review; T Theoretical or Mathematical; X 
                Experimental
  RECORD TYPE:  Journal Paper
     ABSTRACT:  Theories of adaptation, such as those based on the 
                proportionality law of von Kries, provide detailed 
                predictions concerning perception of object colors when 
                illuminant spectral power distribution is changed. Since 
                these predictions depart from the simple ideal of color 
                constancy, a question arises of the relationships among 
                data, theories, and the ideal of constancy. Projecting the 
                data of a constancy experiment into an opponent-color system 
                indicates that constancy tends to hold well for illuminant 
                shifts in the blue-yellow direction but less well for shifts 
                in the red-green direction. This observation is consistent 
                with a theory based on von Kries adaptation (35 Refs.)
  DESCRIPTORS:  colour vision
  IDENTIFIERS:  colour perception; color constancy; proportionality law; von 
                Kries; illuminant spectral power distribution; opponent-
                color system; adaptation
  CLASS CODES:  A8732N (Colour vision: detection, adaptation and 
                discrimination); A8732S (Psychophysics of vision, visual 
                perception, binocular vision)
 Record: 178
   RECORD NO.:  2474439 INSPEC Abstract No: A85077530
       AUTHOR:  Ingle, D.J.
  CORP SOURCE:  Rowland Inst. for Sci., Cambridge, MA, USA
        TITLE:  The goldfish as a retinex animal
       SOURCE:  Science, vol.227, no.4687, p. 651-4
         ISSN:  0036-8075
        CODEN:  SCIEAS
PLACE OF PUBL:  USA
     LANGUAGE:  English
         YEAR:  8 Feb. 1985
    TREATMENT:  X Experimental
  RECORD TYPE:  Journal Paper
     ABSTRACT:  In an experiment designed to test color constancy in a 
                situation comparable to that used in E.H. Land's (1964) 
                experiments with human observers, goldfish were trained to 
                approach a particular color within a richly colored but 
                variable 'Mondrian' background. They retained the ability to 
                identify colors accurately even when the spectral 
                composition of the illuminant was radically altered in 
                generalization tests. Since the behavior of fish resembles 
                that of human beings in these tests, Land's retinex theory 
                seems to apply to a relatively primitive vertebrate as well 
                as to humans (13 Refs.)
  DESCRIPTORS:  colour vision
  IDENTIFIERS:  Mondrian background; colour identification; illuminant 
                spectral composition; colour vision; goldfish; retinex 
                animal; color constancy
  CLASS CODES:  A8732N (Colour vision: detection, adaptation and 
                discrimination)
 Record: 187
   RECORD NO.:  1494346 INSPEC Abstract No: A80041025
       AUTHOR:  West, G.
  CORP SOURCE:  Dept. of Phys., Philipps Univ., Marburg, West Germany
        TITLE:  Color perception and the limits of color constancy
       SOURCE:  Journal of Mathematical Biology, vol.8, no.1, p. 47-
                53
         ISSN:  0303-6812
        CODEN:  JMBLAJ
PLACE OF PUBL:  West Germany
     LANGUAGE:  English
         YEAR:  1979
    TREATMENT:  A Application
  RECORD TYPE:  Journal Paper
     ABSTRACT:  A summary of colorimetry is given and the limits of color 
                constancy mechanism under changing illuminations are 
                discussed (11 Refs.)
  DESCRIPTORS:  colorimetry; colour vision; visual perception
  IDENTIFIERS:  colorimetry; illuminations; colour perception; colour 
                constancy
  CLASS CODES:  A8732N (Colour vision: detection, adaptation and 
                discrimination); A8732S (Psychophysics of vision, visual 
                perception, binocular vision)