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이초일(Lee Cho-Il),김병수(Kim Byeoung-su),추현곤(Choo Hyon-Gon),김진웅(Kim Jin-woong),김회율(Kim Whoi-Yul) 한국방송·미디어공학회 2010 한국방송공학회 학술발표대회 논문집 Vol.2010 No.11
얼굴검출기술이 발달함에 따라 보안 프로그램에서부터 게임에까지 얼굴검출기술이 적용된 다양한 프로그램들이 개발되고 있으며, 휴대단말기기에까지 접목되었다. 휴대단말기기를 통한 얼굴검출의 경우, 검출율을 높이기 위한 높은 대비 개선 알고리즘은 물론이고, 낮은 프로세서의 성능 때문에 적은 연산량의 알고리즘이 필수적으로 요구된다. 본 논문에서는 영상의 조명 정도를 분석하여 저 조도, 일반 조명, 과다 노출의 3분류로 나누고, 각 조명에 가장 알맞은 대비 개선 알고리즘을 사용함으로써, 휴대단말기기에 적합한 적은 연산량과 얼굴검출에 알맞은 높은 대비 개선율을 갖는 알고리즘을 제안한다. 실험 결과, 휴대단말기기인 UMPC(Ultra Mobile PC)에서 30fps의 속도를 보였으며, 기존방법들과 비교하여 가장 좋은 얼굴검출성능을 확인하였다.
이초일(Cho-Il Lee),김병수(Byeoung-su Kim),김회율(Whoi-Yul Kim) 한국방송·미디어공학회 2011 한국방송공학회 학술발표대회 논문집 Vol.2011 No.7
얼굴검출기술의 발전으로 인하여, 다양한 분야에 얼굴 검출을 활용한 기술이 이용되고 있다. 최근 Viola 와 Jones 의 얼굴검출 방법이 신뢰도 있는 검출률과 빠른 연산속도로 인하여 주로 이용되고 있다. 하지만 고해상도 이미지와 제한된 하드웨어를 사용하는 시스템의 경우, 실시간 처리가 어려워지는 문제가 있다. 본 논문에서는 이와 같은 문제를 해결하고자 거리 정보를 이용한 빠른 얼굴검출방법을 제안한다. 속도 개선을 위해 먼저 거리 정보를 이용하여 영상의 불필요한 부분을 제거하고, 피부색상정보를 이용하여 관심영역을 설정한다. 또 크기에 대응하기 위해 피라미드 이미지를 이용하는 방법 대신, 거리 정보를 이용하여 얼굴의 크기를 추정한다. 마지막으로 검색창 내의 거리 분산을 계산하여, 평평하거나 굴곡이 심한 영역을 제거함으로 얼굴 검출 속도를 개선하였다. 실험결과 기존 방법에 비해 더 빠른 검출속도와 유사한 검출성능을 확인할 수 있었다.
이윤나(Yoon Na Lee),이행신(Haeng Shin Lee),장영애(Young Ai Jang),이해정(Hae Jeung Lee),김복희(Bok Hee Kim),김초일(Cho Il Kim) 대한지역사회영양학회 2006 대한지역사회영양학회지 Vol.11 No.3
To explore the relationship between weight status and food intake pattern, the Nutrition Survey results of the 2001 National Health and Nutrition Survey were analyzed. Dietary intake data of Korean adults aged 20 to 64, years who participated in the 2001 National Health and Nutrition Survey, was used along with their demographic data. Subjects were classified into 4 groups based on the BMI value of subjects: underweight, normal, overweight and obese. For male adults, obese subjects had significantly higher mean intake of energy, protein, carbohydrates, and fat than normal subjects. In addition, obese male adults consumed more animal foods, especially more meats, than normal subjects. However, females obese subjects did not show higher intake of energy or fat. Although obese male adults showed higher energy intake, calcium and iron intake per 1000 kcal was lower than normal adults. Average calcium intake in females was low; about 70% of RDA regardless of obesity level. In addition, riboflavin and Vitamin A intake was lower in overweight and obese female than in normal females. Percentage of subjects with low fruit and vegetable intake (<400g per day) was also high in female subjects. These results showed that food and nutrient intake patterns of obese population were different between male and female adults. These dietary intake patterns need to be considered in developing and implementing nutrition policy and intervention programs to prevent and control obesity. Moreover, the National Survey and monitoring system should be developed for continuous and effective investigation on the relationship between obesity and dietary intake. (Korean J Community Nutrition 11(3) : 317~326, 2006)
한국 노인의 저작능력에 따른 식품 및 음식섭취 특성: 2007~2010년 국민건강영양조사 자료에 근거하여
박지은,안희정,정성욱,이윤나,김초일,장영애,Park, Ji Eun,An, Hee Jung,Jung, Sung Ug,Lee, Yoonna,Kim, Cho-Il,Jang, Young Ai 한국영양학회 2013 Journal of Nutrition and Health Vol.46 No.3
The purpose of this study was to examine the characteristics of the dietary intake of Korean elderly according to chew-ing ability using data from the Korea National Health and Nutrition Examination Survey (KNHANES) conducted during 2007-2010. Among subjects aged 65 years and over, more than half, 54.3% of elderly people, were classified as the difficulty in chewing group (DC). The DC group had lower nutrients and food intakes than those of in the no difficulty in chewing group (NDC). Findings showed that subjects in the DC group consumed fewer foods, especially fruits and vegetables. In addition, the DC group had significantly lower intakes of pan-fried food, stir-fried food, braised food, and seasoned-cooked vegetables, which could not be easily cooked or chewed. On the other hand, the number of soups and stews included in the top 30 largely consumed dishes were higher in the DC group than in the NDC group. No difference in numbers of daily meal/snack intake was observed between the two groups, however, the DC group had lower numbers of side-dishes compared to the NDC group. Fewer side-dishes per meal could be related to lower intakes of nutrients in dietary quality. Findings of this study demonstrated that dietary intake was influenced by chewing ability of elderly Korean people. Therefore, study of factors affecting dietary intake such as convenient cooking methods to decrease cooking time and skills to extend preservation and storage time of foods will necessary. In addition, development of food products and new techniques of cooking considering health status, chewing, and swallowing ability is required for the elderly, followed by establishment of standards for senior-friendly food products.
이해정(Hae Jeung Lee),이행신(Haeng Shin Lee),이윤나(Yoon Na Lee),장영애(Young Ai Jang),문재진(Jae Jin Moon),김초일(Cho Il Kim) 대한지역사회영양학회 2007 대한지역사회영양학회지 Vol.12 No.3
This study was performed to delineate the relationship between lifestyle and nutritional risk factors associated with hypertension in representative middle-aged Korean population. Hypertension in this study is defined as hypertensive (SBP≥ 140 mmHg or DBP≥ 90 mmHg) adults without recognition of a disease state before a health exam. With data from the 1998 and 2001 National Health and Nutritional Survey, nutrient intakes of 6,112 adults, 40-64 years of age were calculated using food composition database and matched with health examination records by individual ID. After excluding those with extreme intake values, the number of final subjects included in the analysis was 5,200 (male 2,458, female 2,742). Using logistic regression method, socio-demographic data, lifestyle factors, and nutrient intakes were analyzed. Risky factors for hypertension revealed in this study were age, sex, BMI over 23, waist circumference, alcohol intake of more than 16 g (male) or 8 g (female). Regarding nutrient intakes, the intakes of highest quartile for energy (≥ 2363.0 kcal) and protein (≥ 90.2 g) were significantly associated with higher risk of hypertension after adjusting for age, sex, and other socio-demographic factors (OR = 1.312 (1.046 - 1.711), OR = 1.488(1.194 - 1.854), respectively)). Although high intakes of sodium (≥ 6604.0 mg) and phosphorus seemed to be risk factors of hypertension also before energy adjustment (OR = 1.278(1.034 - 1.581), OR = 1.280(1.024 - 1.600), respectively), only high intakes of energy and protein remained significant after adjustment. This study revealed that modifying risky lifestyles and dietary patterns, especially high energy intake, high protein intake, and high alcohol drinking, in middle-aged Korean adults could result in a prevalence decrease and/or prevention of hypertension. (Korean J Community Nutrition 12(3) : 272~283, 2007)
우리나라 어린이 및 청소년의 식이보충제 섭취에 영향을 미치는 요인
이지연(Jee Yeon Lee),김도희(Do Hee Kim),이윤나(Yoon Na Lee),고은미(Eun Mi Koh),장영수(Young Soo Jang),이혜영(Hye Young Lee),장영애(Young Ae Jang),김초일(Cho Il Kim) 대한지역사회영양학회 2011 대한지역사회영양학회지 Vol.16 No.6
With a recent increase in dietary supplements (DS) consumption among children in Korea, this study was performed to examine the influencing factors on children`s DS consumption. A nationwide survey was conducted employing 3 representative samples of children for summer & fall of 2008 and spring of 2009 by stratified multistage sampling of 120 survey sites per season based on the 2005 census population. Approximately 30 households from each survey site were screened for residing children of 0-19 years and about 1,700 households remained as eligible samples per season. Trained dietitians visited households to perform face-to-face interview to children and/or parents regarding DS consumption including health functional foods (HFF), vitamins/minerals (V/M) supplements and other food supplements during 1 month prior to interview. Out of 5,328 children responded, 18.7% reported DS consumption. Consumption rate was higher in boys (19.9% vs. 17.3% in girls, P < 0.05) and youngsters (22.8% compared to 15.0% in adolescents, P < 0.001). Children from higher income family (P < 0.001), those living in apartments (P < 0.001), those residing in metropolitan area (P < 0.001), and those of mothers with higher education (P < 0.001) were more likely to take DS. Also, mother`s employment status and occupation were significantly associated with children`s DS consumption. The most popular DS was HFF (72.1%), which was consumed more in children of higher income family. It is revealed that socioeconomic factors affect children`s DS consumption significantly. Also it is necessary to estimate children`s V/M intake from DS and foods together especially because there are tolerable upper limits set for V/M for safety purposes. (Korean J Community Nutr 16(6) : 740~750, 2011)