Taoi and Kotu are two ethnic minorities in Vietnam, residing in the western mountainous region of provinces: Quang Tri, Thua Thien Hue and Quang Nam. Taoi groups have a population of about 34 960 people, of which Taoi people living in Aluoi of Hue province have 29 558 people (accounting for 67.35% of Taoi in Vietnam). Kotu people in Hue have 14,629 people (23.8% of Kotu people in Vietnam). Both...

An efficient approach to the sharpening of color images is proposed in this paper. For this, the image to be sharpened is first transformed to the HSV color model, and then only the channel of Value will be used for the process of sharpening while the other channels are left unchanged. We then apply a proposed edge detector and low-pass filter to the channel of Value to pick out pixels around b...

In this study, we used a hue scaling technique to examine human color constancy performance in simulated three-dimensional scenes. These scenes contained objects of various shapes and materials and a matte test patch at the center of the scene. Hue scaling settings were made for test patches under five different illuminations. Results show that subjects had nearly stable hue scalings for a give...

Abstract Advanced argillic minerals, as defined, include alunite and anhydrite, aluminosilicates (kaolinite, halloysite, dickite, pyrophyllite, andalusite, zunyite, topaz), diaspore. One or more of these minerals form in five distinctly different geologic environments hydrolytic alteration, with pH 4–5 to <1, most at depths <500 m. (1) Where an intrusion-related hydrothermal syste...

Temporal changes in soil development were assessed on fluvial terraces of the Little River upper Coastal Plain North Carolina. We examined five profiles from each six surfaces spanning about 100,000 years. Soil-age relationships evaluated with inter-surface clay mineral comparisons and regression chemical properties versus previously reported optically-stimulated luminescence ages using most de...

Discoloration of raw or cooked tissue can occur from cell disruptions and blood migration caused by slow or variable chilling rates. Color parameters established by the Commission International D'Eclairage for measuring lightness, redness, and yellowness (L*, a*, and b* respectively) were determined on two groups (A and B) of uncooked and cooked leg quarters chilled at +4, 0, -3, -12, or -18 C....

Color gamut mapping plays a crucial role in color management. Depending on the application, it is sometimes desirable to perform color gamut mapping by shifting the lightness and compressing the chroma of an out-of-gamut color while preserving the perceived hue of the color. The term Òperceived hueÓ is used to distinguish between the visual sensation of hue and metric hue angle (e.g., CIELAB hu...

Cortical visual area V4 in macaque monkeys has a large proportion of neurons that are sensitive to the wavelength or to the color of light. We tested its role in hue discrimination by removing it in macaque monkeys trained to discriminate small differences in hue. Hue discrimination thresholds were permanently elevated in 4 macaque monkeys in which V4 was removed bilaterally. In contrast, there...