We discuss common colour models for background subtraction and problems related to their utilisation. A novel approach to represent chrominance information more suitable for robust background modelling and shadow suppression is proposed. Our method relies on the ability to represent colours in terms of a 3D-polar coordinate system having saturation independent of the brightness function; specif...

In this paper, common colour models for background subtraction and problems related to their utilisation are discussed. A novel approach to represent chrominance information more suitable for robust background modelling and shadow suppression is proposed. Our method relies on the ability to represent colours in terms of a 3D-polar coordinate system having saturation independent of the brightnes...

In four experiments, a total of 205 participants studied individual color patches and were given an old-new recognition test after a brief retention interval (0.5 or 5.0 s). The pattern of hue sensitivity (d') revealed hue memory shifting away from the prototype of the hue's basic color category. The shifts demonstrate that hue memory is influenced by categorization early in processing. The shi...

Although polar colour spaces are being increasingly used in the context of colour mathematical morphology, mainly due to their intuitiveness, the processing of the circular hue band continues to be their main drawback. In this paper, we discuss the two principal problems concerning the morphological processing of hue, first its lack of a lattice structure, which we propose to introduce by means...

Exogenous covert attention is an automatic, transient form of attention that can be triggered by sudden changes in the periphery. Here we test for the effects of attention on color perception. We used the methodology developed by Carrasco, Ling, and Read [Carrasco, M., Ling, S., & Read, S. (2004). Attention alters appearance. Nature Neuroscience, 7 (3) 308-313] to explore the effects of exogeno...

Color may not only be pleasing to the eye, but may also carry important associations relevant for psychological functioning. Two experiments were conducted to test for basic hue-meaning associations, controlling for lightness and chroma. Specifically, we used a reaction time paradigm to test for links between red and green, and words that varied in achievement content (failure and success) or v...

In the spirit of the HSV color space, we introduce a simple transform of the RGB color cube into a light/dark dimension and a 2D hue. The hue is a normalized (barycentric) triangle with pure red, green, and blue at the vertices, often called the Maxwell Color Triangle. Each cross section of the space is the same barycentric triangle, and the light/dark dimension runs zero to one for each hue so...

In this study, it was aimed to examine and compare the effects of Hibiscus (Hibiscus sabdariffa L.) poppy (Papaver rhoeas extracts on some chemical, physical, microbiological sensory properties bread dough bread. The pH, L, b, chroma, hue values decreased by usage hibiscus extract, while a value increasing. It determined as lowest pH 4.13; L 39.23; b 5.08; chroma 6.55, angle 54.65 highest 7.20....