Results 221 to 230 of about 12,761 (261)
Some of the next articles are maybe not open access.
2012
A quantale is the mathematical structure obtained by enriching a complete lattice with an associative binary operation which commutes with the supremum operation. We refer to an associative memory model that performs operations in a quantale as a quantale-based associative memory (QAM).
Marcos Eduardo Valle +2 more
openaire +1 more source
A quantale is the mathematical structure obtained by enriching a complete lattice with an associative binary operation which commutes with the supremum operation. We refer to an associative memory model that performs operations in a quantale as a quantale-based associative memory (QAM).
Marcos Eduardo Valle +2 more
openaire +1 more source
Correspondence Between CIELAB and CIELUV Color Differences
Color Research & Application, 1977AbstractThe CIE presently recommends two uniform color spaces, the CIE 1976 (L*u*v*)‐space (CIELUV) and the CIE 1976 (L*a*b*)‐space (CIELAB). With each of these spaces is associated a color‐difference formula. Color differences calculated by one formula cannot readily be converted to color differences calculated by the other formula.
openaire +2 more sources
Elementary Morphological Operations on the Spherical CIELab Quantale
2015Mathematical morphology is a theory with applications in image and signal processing and analysis. This paper presents a quantale-based approach to color morphology based on the CIELab color space with spherical coordinates. The novel morphological operations take into account the perceptual difference between color elements by using a distance-based ...
Marcos Eduardo Valle +1 more
openaire +1 more source
Extending CIELAB: Vividness, , depth, , and clarity,
Color Research & Application, 2013AbstractCIE L*, a*, b* is a rectangular coordinate system used extensively for numerical color communication and quality assurance. Often the a*, b* coordinates are rotated to cylindrical polar coordinates of (radial distance) and hab (angle measured counterclockwise from the a* axis), reasonably relating to chroma and hue.
openaire +1 more source
Color pattern recognition with CIELAB coordinates
Optical Engineering, 2002A color pattern recognition system must identify a target by its shape and color distribution. In real situations, however, the color information is affected by changes of the light source (e.g., from indoor illumination to outdoor daylight), often making recognition impossible.
openaire +1 more source
COLOUR EVALUATION ON RED WINEGRAPES BY CIELAB PARAMETERS
Acta Horticulturae, 2012Grape must and wine colour is traditionally assessed by several indexes calculated after measuring absorbance at 420, 520 and 620 nm. In the last years tristimulus colorimetry (mainly CIELab colour space) is increasingly used in research and wineries, since it seems to be a more accurate method to evaluate wine colour, especially at hue junctions when ...
I.G. Santesteban, C. Miranda, J.B. Royo
openaire +1 more source
A hypothesis regarding the poor blue constancy of CIELAB
Color Research & Application, 2003AbstractThe poor blue constancy of the CIELAB equations has been noted by a number of researchers, and various proposals have been made to address this shortcoming. The specific issue is the tendency for highly chromatic blues to appear more purple as the chroma is reduced for a constant hue angle.
openaire +1 more source
Testing CIELAB-based color-difference formulas
Color Research & Application, 2000The CMC, BFD, and CIE94 color-difference for- mulas have been compared throughout their weighting functions to the CIELAB componentsDL*, DC*, DH*, and from their performance with respect to several wide data- sets from old and recent literature. Predicting the magni- tude of perceived color differences, a statistically significant improvement upon ...
openaire +1 more source