This paper analyzes the reasons causing hue (or gray) differences of large-scale image database. Then based on the comparison of some general methods, the paper presents a new hue (or gray) adjustment and smoothness transition method according to the characters of image neighboring and correlative. Meanwhile, in order to reduce spatial transfer errors caused by adjusting large-scale images, an ...

Phenolic compounds and colour stability of red wines produced from Vranec Vitis vinifera L. grape variety were investigated by means of different maceration times (3, 6 and 10 days), two doses of SO2 (30 and 70 mg/L SO2), two yeasts for fermentation (Vinalco and Levuline), temperature of storage and time of aging (3, 6 and 16 months). In general, maceration time influenced the phenolics extract...

ions, as has repeatedly been emphasised in the literature. Stumpf (1917, p. 8), for instance, insisted that a specification of colour attributes is based on the "ability and the conditions for an isolating abstraction"; and Burnham, Hanes & Bartleson (1963, p. 5), in a report on behalf of the Inter-Society Color Council, regarded these "visually abstractable dimensions" as representing "an abst...

This study was conducted to provide a detailed description of waste generation and characteristics from a traditional market in Hue city, located in central Vietnam. The authors conducted a waste generation survey and a waste composition survey for 309 stalls/vendors in five markets by 17 business categories for 10 consecutive days. The waste generation rates by stall/vendor and by floor area w...

PURPOSE The aim of this study was to evaluate the effect of gender and knowledge of color in dentistry on the visual shade-matching ability of dental students with no experience in shade matching and without identification skills. MATERIALS AND METHODS A total of 32 color-normal participants, 16 female (F) and 16 male (M), completed all phases of the experiment. The control group did not list...

It is generally held that protanopes and deuteranopes see only regions of blues and yellows in the visible spectrum, with an achromatic point, called the neutral point, separating these regions. Considerations of a zone model of color vision for the dichromatic observer led us to predict that a reduced form of red/green discrimination would allow equilibrium blue judgements to be made by protan...

We confirm a remarkable but forgotten property of human color vision that was described over 50 years ago by Tyndall [J. Opt. Soc. Am 23, 12 (1933)]: if wavelength discrimination is measured in the region of 455 nm, the sensitivity of the eye improves when a large fraction of the monochromatic light in each half of the matching field is replaced by white light that is common to the two halves. ...

If unique hues have special status in phenomenological experience as perceptually pure, it seems reasonable to assume that they are represented more precisely by the visual system than are other colors. Following the method of Malkoc et al. (J. Opt. Soc. Am. A22, 2154 [2005]), we gathered unique and binary hue selections from 50 subjects. For these subjects we repeated the measurements in two s...