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동일 장면 비-플래쉬 영상을 이용한 플래쉬 영상의 색상 개선
장호석(Ho-Seok Chang),임진영(Jin-Young Lim),정경훈(Kyeong-Hoon Jung),김기두(Ki-Doo Kim),강동욱(Dong-Wook Kang) 한국방송·미디어공학회 2008 방송공학회논문지 Vol.13 No.5
Though flash images are in general less noisy and present details better than no-flash images, they may sometimes be unnaturally saturated to white/gray-tone and have ridiculously strong shadows around the foreground objects due to the strong flashlight. In this paper, we propose a new algorithm to improve the color quality of the flash images by transfer of the color information of the same-scene no-flash images. The proposed algorithm preserves the vivid edges and the clean details of the flash image while transferring natural colors of the no-flash image, so that it makes the constructed images of the better subjective quality. The performance of the proposed algorithm is verified by experiment which applied to the two types of images with different noise levels.
임진영(Jin-Young Lim),장호석(Ho-Seok Chang),강동욱(Dong-Wook Kang),김기두(Ki-Doo Kim),정경훈(Kyeong-Hoon Jung) 한국방송·미디어공학회 2008 방송공학회논문지 Vol.13 No.6
In this paper, a no-reference perceptual metric is proposed for image quality assessment. It measures the amount of overall blockiness and blurring of the image and evaluates the amount of ringing, staircase, and mosaic noises around the strong edges. Finally, the individual scores are combined by a fuzzy integral to generate the final quality score of the image. The quality scores obtained by the proposed algorithm show strong relationship with the MOS(Mean Opinion Score) values by experts.
軍 매개체 감시활동 및 감염지역 식별 : 군내 매개체 전파 감염병 환자 발생지역을 중심으로
김유진 ( Yu-jin Kim ),송진원 ( Jin-won Song ),우형택 ( Hyeong-taek Woo ),방기만 ( Ki-man Bang ),장호석 ( Ho-seok Chang ),박주원 ( Ju-won Park ),장혁 ( Hyeok Jang ) 국군의무사령부 2019 대한군진의학학술지 Vol.50 No.1
Objectives; Distinguish infected areas through the surveillance of rodents and ticks regarding Hemorrhagic Fever with Renal Syndrome(HFRS) and Severe fever with thrombocytopenia syndrome virus(SFTS), which is the recent cause of death of military patients, and prevent the occurring of additional patients. Methods; Requested examination of rodents that were captured in HFRS-occurring areas and ticks from SFTS-occurring areas to the Korea University College of Medicine. Rodents were subjected to an antibodies test through IFA and were tested for HFRSV genes by nested PCR. SFTSV was detected from mites via Real-time RT-PCR. Results; Visited 15 sites to distinguish HFRS-infected areas and cultivated Hantavirus antibodies from 7 rodents from 4 sites. Among these 7 rodents, 3 were shown to carry Hantavirus genes. Negative results were shown for the 4,127 mites examined, which were captured through visiting 3 units with SFTS patients a total of 9 times. Conclusions; Periodic vector surveillance is required to prevent vector-borne infections. Collecting samples is required not only in areas with patients, but also in outdoor training grounds where systematic management is limited and contact with the vector is frequent.