The present paper discusses the concept of subtractive color mixing widely used in color hardcopy applications and shows that a more realistic concept would be “spectral mixing”: the physical description of the coloration of light by printed surfaces comes from the mixing of light components selectively absorbed by inks or dyes during their patch within the printing materials. Some classical re...

In this work we deal with the problem of how different local descriptors can be extended, used and combined for improving the effectiveness of video concept detection. The main contributions of this work are: 1) We examine how effectively a binary local descriptor, namely ORB, which was originally proposed for similarity matching between local image patches, can be used in the task of video con...

Imaging evidence shows that separate subdivisions of parietal cortex, in and around the intraparietal sulcus (IPS), are engaged when stimuli are grouped according to color and to motion (Zeki and Stutters, 2013). Since grouping is an essential step in the formation of concepts, we wanted to learn whether parietal cortex is also engaged in the formation of concepts according to these two attribu...

Komarova et al. (2007) showed that a color naming system could be evolved by combining perceptual discrimination, basic pragmatic constraints on communication, and simple learning rules. Their system relied on a fixed number of color chips and of color categories. Here, I construct an evolutionary game theory model where the equivalent concept of the former and the number of the latter are emer...

It is concluded from presented experimental and theoretical consideration that the notion of “light source” is inadequate for description of the color perception and an alternative way to define and to describe the illumination is suggested. Color constancy as phenomena of perceiving the same color of curved and homogeneously painted surfaces is considered and it is shown that surface colors ca...

Color gamut refers to the range of colors that can be reproduced by an imaging system. The definition of gamut is quite clear for displays and for hard-copy printing. Color image science experts disagree, however, on the definition – or even applicability of the concept – of gamut for cameras. I argue that there is no such concept as “capture gamut.” At the conclusion of this note I’ll outline ...

Structural coloring is production of color by surfaces that have microstructure fine enough to interfere with visible light; this phenomenon provides a novel paradigm for color printing. Plasmonic color is an emergent property of the interaction between light and metallic surfaces. This phenomenon can surpass the diffraction limit and achieve near unlimited lifetime. We categorize plasmonic col...

In the operation of a printing press, color control depends very much on the operator's skill and experience. However, with the development of the color control system by color scale, the conventional operator's skill is being replaced by numerical evaluation of color quality, and productivity is greatly enhanced. Recently, it has been attempted to measure the whole print image and develop a co...