Haar-like와 베지어 곡선을 이용한 얼굴 성분 검출

안경준,이상용,An, Kyeoung-Jun,Lee, Sang-Yong 한국디지털정책학회 2013 디지털융복합연구 Vol.11 No.9

얼굴 검출 기법들의 경우 조명과 배경에 따라 검출의 정확도가 떨어지는 현상이 발생하여, 이를 해결하기 위한 기법들이 요구되고 있다. 본 연구에서는 얼굴의 눈과 입의 성분을 분석하여 인간의 감성 정보를 추출하기 위한 데이터를 획득하고자 한다. 이를 위해 처리속도가 빠르고 환경 요소들에 강인한 검출율을 보이는 얼굴 특징 검출 방법을 제안하였다. 본 방법은 적분 이미지를 적용한 Haar-like Feature기법을 이용하여 얼굴 성분(두 눈, 입)을 검출한 후, 색상 정보를 바탕으로 검출된 성분들을 이진화하고 피부영역과 얼굴 성분영역을 구분한다. 그 후, 빠르고 정확한 shape를 생성하기 위해 베지어 곡선을 이용하여 검출된 성분들의 shape를 생성한다. 제안된 방법의 성능을 평가하기 위하여 Face Recognition Homepage의 데이터를 이용하여 실험을 진행하였으며, 이를 통해 정교한 얼굴 성분 검출이 가능함을 확인하였다. For face detection techniques, the correctness of detection decreases with different lightings and backgrounds so such requires new methods and techniques. This study has aimed to obtain data for reasoning human emotional information by analyzing the components of the eyes and mouth that are critical in expressing emotions. To do this, existing problems in detecting face are addressed and a detection method that has a high detection rate and fast processing speed good at detecting environmental elements is proposed. This method must detect a specific part (eyes and a mouth) by using Haar-like Feature technique with the application of an integral image. After which, binaries detect elements based on color information, dividing the face zone and skin zone. To generate correct shape, the shape of detected elements is generated by using a bezier curve-a curve generation algorithm. To evaluate the performance of the proposed method, an experiment was conducted by using data in the Face Recognition Homepage. The result showed that Haar-like technique and bezier curve method were able to detect face elements more elaborately.

Spectral Band Replication 대역폭 변화에 따른 오디오 부호화 성능 평가

안경준(An Kyung-Jun),김인철(Kim Rin-Chul) 한국방송·미디어공학회 2010 한국방송공학회 학술발표대회 논문집 Vol.2010 No.7

본 논문에서는 오디오 신호의 부호화에 있어 고대역 신호의 부호화를 담당하는 대역 확장 기법인 SBR 대역폭의 변화에 따른 부호화 성능 변화에 대해 고찰한다. 주부호화기(Core coder)의 주파수 대역에 따라 적절한 SBR의 고대역 적용 범위를 선택하여 음질 평가를 통해 부호화 성능을 평가한다.

수영운동과 식이섭취제한으로 유도되는 체내 글리코겐의 변화가 혈액 및 조직 세포내 IL-6와 관련 신호전달 인자에 미치는 영향

안경준 ( Kyung-Jun An ),허성훈 ( Sung-hoon Hur ),이종삼 ( Jong-Sam Lee ),안나영 ( Na-Young Ahn ) 한국체육대학교 체육과학연구소 2021 스포츠사이언스 Vol.39 No.1

본 연구는 수영운동과 식이섭취제한에 의해 유도되는 근육 조직 내 글리코겐의 변화가 혈액과 근육 조직 세포내 IL-6(interleukin-6)의발현과 긴밀한 연관을 맺고 있는 세포 내 신호전달체계의 변화를 연구하고자 하였다. 실험동물을 통제군(n=12)과 단식군(n=12) 및 운동군(n=12)으로 임의배정하였고, 혈액 및 조직 적출을 위해서 단식군의 경우 오후 4에서 다음날 오전 10시까지 물을 제외한 음식의 공급을 중단해 총 18시간의 단식이 되도록 하였고, 운동군의 경우 오전 8시부터 10시 15분까지 총 2시간의 수영운동(30분 운동 후 5분 휴식)을 실시하였으며, 통제군은 특별한 실험 적용을 하지 않은 상태로 실험이 진행되었다. 첫째, 그룹간 체중의 변화에서는 단식군의 18시간 단식 후의 체중과 비교해 2시간의 수영운동을 하기 전 운동군의 체중과 단식군의 18시간 단식 전의 체중에서 높게 나타났다. 둘째, 혈중 글루코스 농도는 단식군과 비교해 통제군과 운동군이 높게 나타났다. 그리고 혈중 유리지방산의 농도는 통제군에 비해 단식군과 운동군에서 높게 나타났으며, 단식군이 운동군과 비교해 높게 나타났다. 셋째, 조직 내 글리코겐 농도의 변화에서는 soleus와 EDL 모두 단식군과 비교해 통제군과 운동군에서 높게 나타났다. 하지만 조직 내 다른 요인(IL-6, Erk1/2, pErk1/2, p38MAPK)들의 변화는 나타나지 않았다. The aim of this study is to investigate the changes in cellular signaling system associated with the expression of IL-6 (interleukin-6) in blood and muscle tissue cells by the changes in body glycogen induced by swimming exercise and food intake restriction. Randomly assigned to the control group(n=12), the fasting group(n=12), and the exercise group(n=12). In addition, for the extraction of blood and tissues, the fasting group stopped supplying food except water from 4 pm to 10 am the next day for a total of 18 hours of fasting. A total of 2 hours of swimming exercise (5 minutes rest after 30 minutes of exercise) was performed in the exercise group, the control group was experimented with no special experimental application. First, the change in body weight, compared to the weight of the fasting group after 18 hours fasting, the weight of the exercise group before the 2 hours swimming exercise and the weight of the fasting group before the 18 hour fasting were higher. Second, concentration of glucose in blood were higher in the control and exercise groups than in the fasting group. The concentration of free fatty acids in blood was higher in the fasting and exercise groups than in the control group, and the fasting group was higher than the exercise group. Third, changes in tissue glycogen levels were higher the control and exercise groups than the fasting group in the sole and the EDL. However, there was no statistical difference of more than 95% in the changes of other factors in the tissues (IL-6, Erk1/2, pErk1/2, p38MAPK).

Spectral Band Replication 대역폭에 따른 MPEG USAC 부호화 성능 평가

안경준(Kyung Jun An),정유선(Yoosun Jung),백승권(Seungkwon Beack),강경옥(Kyeongok Kang),김인철(Rin Chul Kim) 한국방송·미디어공학회 2011 방송공학회논문지 Vol.16 No.5

소결공구용 Fe-Cu계 혼합분말의 소결모델링

안경준(K. J. An),전동술(D. S. Jeon) 한국생산제조학회 2022 한국생산제조시스템학회 학술발표대회 논문집 Vol.2022 No.7

자장강화된 유도결합형 플라즈마를 이용한 산화막 식각에 대한 연구

안경준(K. J. An),김현수(H. S. Kim),우형철(R. Woo),유지범(J. B. Yoo),염근영(G. Y. Yeom) 한국진공학회(ASCT) 1998 Applied Science and Convergence Technology Vol.7 No.4

본 연구에서는 자장강화된 유도결합형 플라즈마를 사용하여 이 플라즈마의 특성을 조사하고 또한 산화막 식각에 미치는 영향에 대하여 조사하였다. 자장 강화를 위해 4쌍의 영구자석이 사용되었고, 산화막 식각을 위해 C₂F_6, CHF₃, C₄F_8 가스 및 이들 혼합가스가 사용되었으며 첨가가스로 H₂를 사용하였다. 자장강화된 유도결합형 플라즈마 특성 분석을 위해 Langmuir probe 와 optical emission spectrometer를 이용하였으며 산화막 식각 속도 및 photoresist에 대한 식각 선택비를 stylus profilometer를 이용하여 측정하였다. 이온 밀도에 있어서 자장 유무에 따른 큰 변화는 관찰되지 않았으나 이온전류밀도의 균일도는 자장을 가한 경우 웨이퍼가 놓이는 기판 부분에서 상당히 증가된 것을 알 수 있었다. 또한 자장이 가해진 경우, 자장을 가하지 않은 경우에 비해 플라즈마 전위가 감소된 반면 전자온도 및 라디칼 밀도는 크게 증가되는 것을 알 수 있었으며 산화막 식각시에도 높은 식각 속도와 식각 균일도를 보였다. 산화막 식각을 위해 수소가스를 사용한 가스조합중에서 C₄F_8/H₂가스조합이 가장 우수한 식각 속도및 photoresist에 대한 식각 선택비를 나타내었으며 공정변수를 최적화 함으로써 순수 C₄F_8에서 4이상의 선택비와 함께 8000 Å/min의 가장 높은 식각속도를 얻을 수 있었으며, 50%C₄F_8/50%H₂에서 4000 Å/min의 산화막 식각 속도와 함께 15이상의 식각 선택비를 얻을 수 있었다. In this study, the effects of multi-dipole type of magnets on the characteristics of the inductively coupled plasmas and SiO₂ etch properties were investigated. As the magnets, 4 pairs of permanent magnets were used and, to etch SiO₂, C₂F_6, CHF₃, C₄F_8, H₂, and their combinations were used. The characteristics of the magnetized inductively coupled plasmas were investigated using a Langmuir probe and an optical emission spectrometer, and SiO₂ etch rates and the etch selectivity over photoresist were measured using a stylus profilometer. The use of multi-dipole magnets increased the uniformity of the ion density over the substrate location even though no significant increase of ion density was observed with the magnets. The use of the magnets also increased the electron temperature and radical densities while reducing the plasma potential. When SiO₂ was etched using the fluorocarbon gases, the significant increase of SiO₂ etch rates and also the increase of etch uniformity over the substrate were obtained using the magnets. In case of gas combinations with hydrogen, C₄F_8/H₂showed the highest etch rates and etch selectivities over photoresist among the gas combinations with hydrogen used in the experiment. By optimizing process parameters at 1000 Watts of inductive power with the magnets, the highest SiO₂ etch rate of 8000 Å/min with the etch selectivity of 4 could be obtained for 100% C₄F_8 and the highest etch selectivity of over 15 with the SiO₂ etch rate of 4000 Å/min could be obtained for 50% C₄F_8/50% H₂.

캐딜락 기구를 이용한 필라테스 전후방 팔 뻗기 동작이 체간 근 활성도에 미치는 효과

김진령 ( Jinryeong Kim ),허성훈 ( Sunghoon Hur ),안경준 ( Kyungjun An ),김송준 ( Songjune Kim ),이종삼 ( Jongsam Lee ) 대한스포츠의학회 2018 대한스포츠의학회지 Vol.36 No.4

Purpose: This study analyzed the muscle activity changes induced by motions of reaching forward and chest expansion that were examined from the bilateral muscles with rectus abdominis, external oblique, multifidus, and longissimus thoracic using Pilates cadillac instrument. Methods: Nine young adult women, who have no musculoskeletal disorder and any of chronic diseases, were participated. Surface electromyography system was used for recording of all signals produced by muscles, and then normalized as percentage of maximum voluntary isometric contraction (%MVIC). The paired t-test and repeated measures of analysis of variance was performed. Results: Reaching-forward motion showed a higher muscle activity from non-dominant external oblique muscle than that of the chest-expansion motion. During both reaching-forward motion and chest-expansion motion, MVIC values collected from dominant side of external oblique muscle were shown a significantly lower than the values obtained from non-dominant side (p<0.05). Conversely, %MVIC values in external oblique muscle collected from dominant side showed a significantly higher than the values obtained from non-dominant side of the same oblique muscle (p<0.05). Reaching-forward motion was caused a higher %MVIC on non-dominant external oblique muscle than that of the chest-expansion motion (p<0.05). Regardless of dominant or non-dominant sides, external oblique muscle was shown the highest activation rate of all the other muscles during reaching forward action, and longissimus thoracic muscle was shown the highest activation rate of all the other muscles during chest expansion action. Conclusion: Reaching-forward motion is suitable for activating an external oblique muscle, and chest-expansion motion is an effective enough in activating of longissimus thoracic muscle.

전·평시 장병 건강 및 체력관리 프로그램 개발

김운철 ( Woon Chol Kim ),허성훈 ( Sung Hoon Hur ),안경준 ( Kyung Jun An ),김성훈 ( Sung-hoon Kim ),성열호 ( Maj Yul Ho Sung ),김성종 ( Col Sung Jong Kim ),조승호 ( Col Sung Ho Jo ),이종삼 ( Jong Sam Lee ) 국군의무사령부 2018 대한군진의학학술지 Vol.49 No.1

This study aims to review a need of change in soldier’s physical training and develop new training factors. Such factors of physical fitness tests were proposed for soldier’s health and fitness management, and their training effects were tested in this study. No significant effect on 12-min running performance was found at CON and ETG, but NTG showed a significant improvement after the exercise(Postexe, P<.05). As for the performance change in the 20kg-weight transferring capacity on every 5-m interval, CON and NTG showed a significant difference at post-exercise, compared to pre-exercise estimates(P< .05), while ETG had no significant effect(P >.05). For more details, the transferring distance by CON decreased by 10.5%, while ETG and NTG marked an increase of 0.4% and 6.8%, respectively. As for the change in isometric muscular endurance performance, CON’s endurance time decreased by 2.6%, but ETG and NTG showed an increase of 18.7% and 37.7%, respectively. Most noticeable improvement was made by NTG. Sit & Reach test results showed every group’s performance decreased commonly after the exercise, but NTG’s range of decrease(-0.2cm) was markedly smaller than ETG(-0.8cm) and CON(-0.7cm). Such decrease in record came from stiffened muscles by a certain temperature fall on the test day after the 4-week exercise training program. However, From NTG’s record showing the smallest decrease, NTG seems to keep the best performance in sit & reach among the groups. The following conclusions can derived from the test results. New exercise training program in this study created a performance increase in 12-min running, 40m sprint with 20kg-weighted backpack, isometric muscular endurance and sit & reach(cardiorespiratory endurance, strength/muscular endurance, abdominal muscle power/endurance/flexibility). This means new exercise training program was significantly effective on endurance/strength/flexibility which are most essentially needed for soldiers. Although other test records in this study didn’t create the changes expected, future studies with different conditions of exercise training and time period will provide better results. Our military forces are recommended to execute the physical training program for soldiers, including the physical factors such as strength, explosive muscular strength, agility and flexibility. The existing endurance-oriented tests and overlapped evaluations should be avoided from physical fitness program and tests, but, instead, explosive muscular strength, agility and flexibility are strongly recommended to be included in the exercise program.

젖산염의 섭취가 육상 선수의 장시간 달리기 운동수행력에 미치는 영향

허성훈 ( Sung-hoon Hur ),안경준 ( Kyung-Jun An ),김윤미 ( Yoon-mi Kim ),권영우 ( Yeung-woo Kwon ),이종삼 ( Jong-Sam Lee ) 한국체육대학교 체육과학연구소 2021 스포츠사이언스 Vol.39 No.3

본 연구의 목적은 육상 선수를 대상으로 젖산염의 섭취에 따라 혈중 생리적 지표와 운동수행력에 미치는 효과를 규명하여 운동 선수들의 경기력 향상에 기초 자료를 제공함에 있다. 대구 소재 D대학교의 재학중인 중-장거리 육상 선수 총6(남 5, 여 1)명을 선정하였다. 실험 절차는 총 4회(음료를 섭취하지 않은 조건, No drink; 물을 섭취한 경우, Water; 이온 음료, Ion fluid; 젖산염이 함유된 음료, Polylactate)의 실험에 참가하였으며, 운동 강도 적용은 Karvonen et al.,(1957)의 예비심박수 산출 공식을 이용해 예비심박수의 65, 85, 90%에 해당되는 목표 심박수를 적용해 산출하였다. 음료의 섭취는 총 8회(운동 전 -30, -5분, 운동 중 15, 30, 45, 60, 75, 90분)에 걸쳐 이루어졌으며, 혈액 표본 채집 및 생리적 변인의 측정은 총 4회(-40, -5, 90분, All-out) 채집하여 분석한 결과, 첫째, 장시간 달리기 운동 중 음료 섭취에 따른 혈중 생리적 지표(glucose, lactate, pH, HCO₃^-)의 유의한 변화를 나타내지 못했다. 둘째, 장시간 달리기 운동 중 음료 섭취에 따른 운동수행력(time to exhaustion)을 분석한 결과, 장시간 달리기 운동 중 음료 섭취 형태에 따른 운동수행력은 음료를 섭취하지 않은 조건(ND: 12.4±8.7분), 물을 섭취한 경우(Water: 21.8±1.1분), (PS: 28.2±12.5분), 젖산염이 함유된 음료(CM: 36.7±7.6분) 순으로 운동 수행 시간이 향상된 것으로 나타났으나 젖산염이 함유된 음료는 이온 음료와 비교해 유의한 기록의 향상은 나타나지 않았다. This study aims to to find out the effect of polylactate ingestion on physiological indices exercise performance in elite distance runners. Six (5 male and 1 female) elite distance runners (age: 21.3±0.7 years, height: 168.0±7.1 cm, body weight: 55.1±7.8 kg, VO₂max: 66.6±3.3 mL·kg^-1·min^-1) volunteered for this study. In a single blind and random cross over design, subjects participated separated 4 trials; No Drink (ND), Water, PS (ion fluid), CM (polylactate). Blood sample were collected during the four phases of treadmill exercise; rest exercise (-40 min), before exercise (-5 min), after exercise (90 min) and all-out. Runners performed continuous exercise with ingestion of drink (ND, Water, PS, CM) at 65% of THR (target heart rate) for 90 minutes followed by 85% of THR with 5°for 20 minutes (if completed 85% running performance then applied 90% of THR with 5°) until volitional time to exhaustion (TTE). There were no differences between the conditions for any physiological indices. Running TTE increased for CM compared to between ND and Water trials (12.41±5.60 min and 21.82±0.69 min, respectively). However, time to exhaustion did not differ between both conditions (28.22±8.06 and 32.09±9.90 minutes for PS and CM). This study demonstrated that ingestion of polylactate does not sufficiently large to improve extracelluar buffering capacity and endurance exercise performance.

체내 크레아틴 민감성 변화가 크레아틴 구강 섭취 시 건강한 여성의 체지방과 근육량의 변화에 미치는 영향

신보옥(Bou-Ouk Shin),안경준(Kyung-Jun An),이종삼(Jong-Sam Lee) 한국여성체육학회 2021 한국여성체육학회지 Vol.35 No.1