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RISS 인기검색어
- 검색키워드
- 저자 : Haruhiko Okumura (검색결과 2 건)
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Hyperrealistic frameless display for future displays
Haruhiko Okumura,Takashi Sasaki 한국정보디스플레이학회 2017 Journal of information display Vol.18 No.2
Described in this paper is a novel hyperreality display called ‘head dome projector (HDP).’ HDP is a head-mounted display consisting of a dome-shaped screen with a very small radius (40 cm), a mobile projector with an ultra-wide projection lens, and light-emitting diode (LED) light sources. The principal feature of HDP is a very wide-viewing angle: 160° horizontally×120° vertically, comparable to the human visual field, without head tracking, and 360×360° with head tracking. In the subjective evaluation and comparison of HDP with a flat-panel display (FPD), HDP achieved 2.5-points higher hyperreality than FPD in the case of a ±5-level evaluation for high-definition motion images. Also proposed herein is a novel hyperrealistic head-up display (HUD) concept, the windshield-refracted augmented reality projector (WARP), and described is the developed prototype WARP system. It uses monocular vision, which eliminates the depth cues caused by parallax information. The developed WARP system achieved free depth control of the HUD image position.
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Sasicha Chensom,Haruhiko Okumura,Takashi Mishima 한국식품영양과학회 2019 Preventive Nutrition and Food Science Vol.24 No.2
Thirteen edible flowers, which are used as food ingredients in Japan, were evaluated as possible sources of antioxidants and biological compounds. The nutritional composition, total polyphenol content (TPC), carotenoid content, and antioxidant activity of the edible flowers were determined based on the oxygen radical absorbance capacity (ORAC). Water was the main constituent of edible flowers, and carbohydrates were the primary macronutrients. The TPC of the edible flowers varied from 1.47 to 13.08 mg gallic acid equivalent/g fresh weight (FW). Carotenoids, including β-carotene and β-cryptoxanthin, were detected mainly in the edible flowers with petal colors ranging from yellow to orange, but especially in primula and cosmos yellow flowers, which have yellow petals. The ORAC value of the hydrophilic extract (HORAC) of edible flowers was higher than the ORAC value of the lipophilic extract (LORAC). The total antioxidant capacity (TAC) ranged from 33.03 to 320.36 μM Trolox equivalent/g FW. The highest TPC and TAC were observed in cosmos yellow flowers. On the basis of Pearson’s correlation coefficient, the HORAC value and the TPC of the analyzed edible flowers were highly correlated (r=0.736). This preliminary study indicates that edible flowers are a potential source of antioxidants, and the addition of edible flowers to the human diet may be associated with health benefits.
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