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계층적 우선순위 BP 알고리즘을 이용한새로운 영상 완성 기법
김무성,강행봉 대한전자공학회 2007 電子工學會論文誌-SP (Signal processing) Vol.44 No.5
The purpose of this study is to present a new energy minimization method for image completion with hierarchical approach. The goal of image completion is to fill in missing part in a possibly large region of an image so that a visually plausible outcome is obtained. An exemplar-based Markov Random Field Modeling (MRF) is proposed in this paper. This model can deal with following problems; detection of global features, flexibility on environmental changes, reduction of computational cost, and generic extension to other related domains such as image inpainting. We use the Priority Belief Propagation (Priority-BP) which is a kind of Belief propagation(BP) algorithms for the optimization of MRF. We propose the hierarchical Priority-BP that reduces the number of nodes in MRF and to apply hierarchical propagation of messages for image completion. We show that our approach which uses hierarchical Priority-BP algorithm in image completion works well on a number of examples. 본 논문은 영상 완성(image completion)을 위해 계층적으로 적용되는 새로운 에너지 최적화 방식을 제안한다. 영상 완성의 목적은 영상의 특정 영역이 지워진 상태에서, 그 지워진 부분을 나머지 부분과 시각적으로 어울리도록 완성시키는 기법을 말한다. 본 논문에서는 전역적 특징의 탐지, 주변 환경 변화에 대한 유연성, 계산비용의 감소, 영상 인페인팅과 같은 관련기법들로의 확장성 문제들을 다룰 수 있도록 마르코프 랜덤 필드(Markov Random Field)로 모델링 된 예제 기반 방식(exampler-based mehtod) 접근법을 택한다. 그리고 MRF에서의 에너지 최적화를 위해 BP 알고리즘(Belief Propagation Algorithm)의 변형인 우선순위 BP 알고리즘(Priority-Belief Propagation Algorithm)을 적용하였다. 본 논문에서 제안한 계층적 우선순위 BP 알고리즘(Hierarchical Priority-Belief Propagation Algorithm)은 MRF의 정점의 수를 줄이고 메시지를 계층적으로 전파한다. 이렇게 계층적 우선순위 BP 알고리즘을 영상 완성에 적용하여 여러 영상들에서 바람직한 결과를 얻었다.
金武成,朴薰,金侊來 경희대학교 부설 식량자원개발연구소 1983 硏究論文集 Vol.4 No.-
The yield of dry matter and total nitrogen content of forage crops which were sown grown alone and in mixture with orchardgrass and legumes such as alfalfa, red clover, birdsfoot trefoil were studied using nitrogen fertilization and inoculation, and the results are as follows: 1) With-nitrogen for the yield of dry matter of forage crops was highly effective only to orchardgrass and was also effective to the early stages of alfalfa and birdsfoot trefoil in case of a mixed sowing. 2) In accordance with inoculation, the yield of dry matter of forage legumes on without-nitrogen increased as compared with that of orchardgrass. 3) Alone and mixed sowings showed the yield of dry matter and total nitrogen content in a decreasing order of alfalfa>red clover>orchardgrass>birdsfoot trefoil, and orchardgrass+alfalfa>orchardgrass+red clover>orchardgrass+birdsfoot trefoil, respectively. 4) The total nitrogen content and yield of dry matter revealed a positive correlation, and nitrogen was found to be a major factor for the dry matter productivity.
低溫下에서 窒素施肥가 根瘤菌을 接種한 Alfalfa의 生育部位에 미치는 影響에 關하여
金武成,Jensen, E.H. 경희대학교 부설 식량자원개발연구소 1986 硏究論文集 Vol.7 No.-
There are differences in recommendations in the USA as to whether nitrogen fertilizer should be applied when establishing alfalfa (Medicago sative L). The reason for not applying nitrogen is because some researchers found the addition of nitrogen reduced nodulation of alfalfa plants. A replicated experiment was conducted under controlled environmental conditions at the University of Nevada-Reno, Reno, Nevada, USA, to determine the effects of nitrogen application on seedling growth and nodulation of alfalfa when grown in a cool environment. A sterile sand was used in the growing media to which a complete nutrient solution minus nitrogen was applied volumetrically to each pot daily. Half of the pots received NH_(4)NO_(3), at the rate of 11.2 kg/ha, at seeding and two and four weeks after planting, giving a total nitrogen application rate of 33.4 kg/ha. Rhizobia inoculant (R-12) consisted of a mixture of strains 17115a, 1682c and 80 PI 265 of Rhizobium meliloti. Inoculant was applied to the seeds prior to planting and to the sand media at two and four weeks after seeding. Twenty seeds were planted in pots 14.0 cm in diameter and 11.5 cm deep. Seedlings were thinned after emergence to ten plants per pot. They were grown in a controlled environment chamber with a 16-hour light period. Soil temperatures at 6 cm depth ranged from 5.7℃ to 21.5℃ and had a daily mean of 16.2℃. Plants were harvested at weekly intervals for seven weeks at which time root, shoot and total length, dry weight, volume and number of nodules per plant were determined. Root, shoot and total length were not affected by nitrogen fertilizer. However, application of nitrogen increased the size of the seedlings as determined by dry weight and volume when compared to plants which were not fertilized. This indicates that rhizobia did not fix enough atmospheric nitrogen to promote good growth. Nitrogen application resulted in significantly more nodules per plant. The effect of nitrogen fertilizer became more apparent as the plant became older. Results of this experiment show there are benefits from applying nitrogen at a low rate when establishing alfalfa under a cool environment.
Reporting the possibility of invasive populations of Anoplophora spp. in Korea
김무성,Kyong Young Kim,Wonhoon Lee,Ki-Jeong Hong 국립중앙과학관 2019 Journal of Asia-Pacific Biodiversity Vol.12 No.2
In Korea, two species, Anoplophora chinensis and Anoplophora glabripennis, have been recorded until now. Recently, outbreaks of Anoplophora spp. were reported locally in Seoul, Ulsan, Incheon, Gimhae, and Jeonju from 2015 to 2017. In this study, Anoplophora spp. were collected in the four regions, Ulsan, Incheon, Gimhae, and Jeonju, and their morphological and molecular characteristics were compared with those of Anoplophora spp. collected from several local regions. In A. glabripennis, indigenous populations (A10∼A12, Pochoen) revealed genetic differences of an average 1.58% from putative invasive populations (A1∼A7, Ulsan/Gimhae; A8∼A9, Incheon; A18∼A20, Jeonju). In A. chinensis, indigenous populations (A13∼A15, Suncheon/Goheung/Pocheon) showed genetic differences of an average 1.2% from putative invasive populations (A16∼A17, Ulsan). In a neighbor-joining tree, A. glabripennis was separated into two groups, Ulsan/Gimhae/Incheon/Jeonju and Pocheon populations, and A. chinensis was divided into two groups, Ulsan and Suncheon/Goheung/Pocheon populations. Twelve COI sequences of the Incheon/Gimhae/Ulsan/Jeonju populations in A. glabripennis were identical to KY357648, KY357652, and KY357651, and two COI sequences of Ulsan populations in A. chinensis were identical to AB439163. These sequences were generated from Chinese and Japanese Anoplophora samples by foreign researchers, suggesting the possibility of the invasion of Chinese and Japanese populations of Anoplophora spp. into Korea.