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Human factors of UHD viewing experiences for two different age groups
Park, YungKyung,Kim, YoonJung,Park, Daeun The Korean Infomation Display Society 2018 Journal of information display Vol.19 No.1
In an attempt to contribute to the development of ultra-high-definition (UHD) TV viewing guidelines, the factors that may affect the image quality and visual comfort for both the adult and elderly groups were considered: viewing distance (2H, 4H, and 6H), surrounding environment (illuminance levels 0.6 and 250 lx), video content (day and night, high and low speed), and resolution (UHD and full HD). It was found that the surrounding viewing conditions affected the visual comfort of the adult group more than that of the elderly group. The young adults felt more comfortable visually watching TV in an illuminated room than in a dark room. It was also found that the higher resolution ensures satisfactory visual quality despite the deviations in the viewing distance. With the UHD resolution, the viewing distance was the most significant factor contributing to the image quality and visual comfort for both age groups. Therefore, 'visual comfort distance' was recommended considering each human factor variable for the optimal UHD TV viewing experience.
Study on the Association of Sweetness by Two-color Combinations in Package Design
JaeRyung Park,YungKyung Park 한국색채학회 2017 AIC 2017 Jeju Vol.2017 No.10
The purpose of this study is to provide basic data on the application of color combination in the package design of sweet products by studying the effect of color combination on the associations of sweetness in the package design of sweet food products. For this purpose, two surveys were conducted with two-color combination samples of KS 15 basic color and Vivid tone and Pale tone color of IRI Hue & Tone 120 system to recognize sweetness associativity. As a result of the first experiment, strong sweetness was associated by color combination of package design including Pk and Y. In the second experiment, we could see that the color combination including Pale R and Pale RP reminds us of sweetness. The results of these two experiments showed that the color combination including Pink strongly influenced sweetness associations, and the hypothesis that specific monochromatic colors affects sweet association is proved. This study is expected to contribute to the effective delivery of product images in the package design of sweet products.
박다은(Park, DaEun),홍해령(Hong, HaeRyung),박영경(Park, YungKyung) 한국색채학회 2019 한국색채학회 논문집 Vol.33 No.3
Personalized makeup is preferred based on individual skin color diagnosis. In accordance, the need to diagnose skin color accurately is required. Skin color varies across different body locations and therefore inaccurate to measure skin color. For these reasons, human skin color is hard measure as a single color value. Therefore, this study investigated how to classify the tone and brightness of human skin by hue than to measure the skin color. Hue is easier for non-professionals to answer and has a wider choice than warm and cool based skin color. In this study, detailed classification of skin colors was attempted using skin color specimens and actual facial images. Based on the PANTONE SkinToneTM Guide, and real skin images, the skin was classified in terms of six hues of Reddish / Yellowish / Orangish / Greenish / Bluish / Purplish. Considering that skin color can be explained by relative values, the measurement data was converted to a difference (delta) from the average value. In skin colors, Redness (a*) and Yellowess (b*) were calculated by classifying each of them into two large categories and to clearly distinguish Lightness (L*) and Chroma (C*) from the tone graph. Δa*(Redness) and ΔL*(Lightness) are calculated as differences from average value. In the same way, Δb*(Yellowness)-ΔC*(Chroma) was also calculated to explain the hue classification. We also identified that Korean skin color is divided into yellow, reddish, and orangish and the relationship with Δb* and ΔC* values of CIELAB.
박영경(YungKyung Park) 한국색채학회 2018 한국색채학회 학술대회 Vol.2018 No.5
피부색에 대한 측정 시도는 다양한 분야에서 이루어져왔고 현재도 연구되어지고 있다. 본 연구는 한국인의 피부색의 분포를 색채측면에서 분석하고 분류하고자 하였다. 균일한 피부색 시편 값의 상대적인 색채 비교를 통해 지각적 측면에서 세분화하여 분류하고자 하였다. 110개의 피부색을 yellowish, orangeish, reddish, greenish, purplish와 bluish 5가지 기본색으로 분류하도록 하고 그중 30개의 색을 한국인의 피부색으로 실측값과 육안측색을 선정하고 분석하였다. 평균값과의 차이로 Δa*(Redness), ΔL*(Lightness)와 Δb*(Yellowness)-ΔC*(Chroma)의 관계를 통해 피부색 분포를 설명하였다. 이와 같은 관계에서 한국인의 피부색은 채도와 b*값이 평균이상이면 a* 값이 평균이하이면 yellowish 피부색이고 이와 정반대의 색채를 가지면 reddish 피부색, 이도저도 아니면 orangeish(neutral) 피부색을 가진다고 할 수 있다.
DaEun Park,YungKyung Park 한국색채학회 2017 AIC 2017 Jeju Vol.2017 No.10
This study researched on the elderly group’s image quality preference characteristics according to the brightness and saturation changes of images. To do this, subjects were divided into adult group and elderly group according to age, and subjective image quality preference evaluation experiment was conducted. Experimental results showed that image quality preference tendency was different by brightness and saturation of images. First, as the brightness decreased, the degree of image quality preference of the Elderly group decreased significantly compared to the Adult group. On the other hand, in the case of saturation decrease, the degree of image quality preference of the Adult group decreased significantly while the Elderly group did not show any significant change. It was confirmed to be necessary to adjust brightness of image upward compared to adult group to satisfy the image quality preference of the elderly group at a high level.
박진희(Jinhee Park),박영경(Yungkyung Park) 한국색채학회 2012 한국색채학회 학술대회 Vol.2012 No.11
본 연구는 현재 전시시설들 내의 작품부분의 조명 색과 밝기 정도를 알아보고자 한다. 연구 대상은 기획에 따라 작품이 자주 교체되고, 영리성을 목적으로 하는 갤러리로 선정하였으며, 조사 결과 조명 색은 갤러리마다 각기 다양한 색으로 나타났다. 또한 작품 부분의 밝기는 일반조명과 전시조명을 함께 사용한 갤러리보다 전시조명만 사용한 갤러리가 더 높게 나타났으며, 한 갤러리 내에서 작품 부분과 조명되지 않은 벽면의 밝기의 차이는 전시조명만을 사용한 갤러리에서 더 큰 것으로 나타났다. 조명 기구가 기획에 따라 교체되지 않고 계속적으로 쓰이고 있는 것으로 보아 이러한 조명 색 차이는 작품을 고려한 것이 아닌, 단순히 각 갤러리의 조명 기구의 색으로 보여진다. 따라서 전시 기획에 따라 작품이 교체되는 갤러리 안에서 작품에 맞는 조명 색을 맞춰 구현시킨다면 갤러리를 찾는 관람객에게 작품의 최고의 진가를 선보일 수 있으리라 기대된다.