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Ganchimeg Ganbold,Stanley Chasia 건국대학교 지식콘텐츠연구소 2017 International Journal of Knowledge Content Develop Vol.7 No.1
There are several statistical classification algorithms available for land use/land cover classification. However, each has a certain bias or compromise. Some methods like the parallel piped approach in supervised classification, cannot classify continuous regions within a feature. On the other hand, while unsupervised classification method takes maximum advantage of spectral variability in an image, the maximally separable clusters in spectral space may not do much for our perception of important classes in a given study area. In this research, the output of an ANN algorithm was compared with the Possibilistic c-Means an improvement of the fuzzy c-Means on both moderate resolutions Landsat8 and a high resolution Formosat 2 images. The Formosat 2 image comes with an 8m spectral resolution on the multispectral data. This multispectral image data was resampled to 10m in order to maintain a uniform ratio of 1:3 against Landsat 8 image. Six classes were chosen for analysis including: Dense forest, eucalyptus, water, grassland, wheat and riverine sand. Using a standard false color composite (FCC), the six features reflected differently in the infrared region with wheat producing the brightest pixel values. Signature collection per class was therefore easily obtained for all classifications. The output of both ANN and FCM, were analyzed separately for accuracy and an error matrix generated to assess the quality and accuracy of the classification algorithms. When you compare the results of the two methods on a per-class-basis, ANN had a crisper output compared to PCM which yielded clusters with pixels especially on the moderate resolution Landsat 8 imagery.
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History Document Image Background Noise and Removal Methods
Ganchimeg.G 건국대학교 지식콘텐츠연구소 2015 International Journal of Knowledge Content Develop Vol.5 No.2
It is common for archive libraries to provide public access to historical and ancient document image collections. It is common for such document images to require specialized processing in order to remove background noise and become more legible. Document images may be contaminated with noise during transmission, scanning or conversion to digital form. We can categorize noises by identifying their features and can search for similar patterns in a document image to choose appropriate methods for their removal. In this paper, we propose a hybrid binarization approach for improving the quality of old documents using a combination of global and local thresholding. This article also reviews noises that might appear in scanned document images and discusses some noise removal methods.
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Detection of Edges in Color Images
Ganchimeg, Ganbold,Turbat, Renchin The Institute of Electronics and Information Engin 2014 IEIE Transactions on Smart Processing & Computing Vol.3 No.6
Edge detection considers the important technical details of digital image processing. Many edge detection operators already perform edge detection in digital color imaging. In this study, the edge of many real color images that represent the type of digital image was detected using a new operator in the least square approximation method, which is a type of numerical method. The Linear Fitting algorithm is computationally more expensive compared to the Canny, LoG, Sobel, Prewitt, HIS, Fuzzy, Parametric, Synthetic and Vector methods, and Robert' operators. The results showed that the new method can detect an edge in a digital color image with high efficiency compared to standard methods used for edge detection. In addition, the suggested operator is very useful for detecting the edge in a digital color image.
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간치맥(Ganchimeg Gantumar),조만현(Man Hyun Jo),다바잘갈(Davaajargal Igori),함인기(In Ki Ham),이은모(Eun Mo Lee),이왕희(Wang-Hee Lee),임용표(Yongpyo Lim),안길환(Gilhwan An),박종태(Jong-Tae Park) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.9
본 연구는 중국유래 14 품종 청경채의 영양적 특성을 평가하고자 수행되었다. 14종의 신규 청경채(Brassica rapa L.ssp. chinensis)를 대표적인 국산 배추(Brassica rapa L.ssp. pekinensis) 4 품종과 함께 2008년 충남 예산에서 재배하여 수확한 후 녹색 부위와 백색 부위로 나누어 부위 별 각종 영양 성분 분석을 수행하였다. 청경채의 수분 및 회분함량은 배추에 비교하여 유의적 차이가 없었으나 수분은 백색 부위에서, 회분은 녹색 부위에서 높게 나타났다. 전체적인 무기염류 함량은 배추에 비하여 청경채가 높은 것으로 측정되었는데 특히 녹색 부위의 함유량이 유의적으로 높은 것으로 드러났다. 특히 현대인의 건강에 매우 중요한 Ca과 Mg의 함유량은 청경채(Ca녹색: 2.57, Ca백색: 2.04; Mg녹색: 0.422, Mg백색: 0.301 mg/g 신선물 기준)가 배추(Ca녹색:0.805, Ca백색: 0.477; Mg녹색: 0.244, Mg백색: 0.101 mg/g신선물 기준)에 비하여 매우 높았다. 환원당의 함량은 청경채와 배추가 유사한 값을 나타내었고 색에 따른 유의적 차이도 없었다. 펙틴은 부위에 따른 차이는 있으나 청경채에서 그 함량이 높게 나타났고, 식물 조직의 경도에 영향이 큰 셀룰로오스의 함량은 청경채가 약 4배 이상 배추보다 높았다. 비타민 C와 E 함량은 청경채와 배추가 유사한 것으로 측정되었다. 위와 같이 청경채는 영양적으로 매우 우수하여 소비자들에게 권장할 만한 매일 섭취해야 할 주요 채소작물의 하나로 손색이 없음을 알 수 있었다. 또한 청경채는 국내배추의 품질 향상을 위한 육종 소재로서도 활용가치가 높을 것으로 사료된다. The nutritional components of 14 new cultivars of pak choi (Brassica rapa L. ssp. chinensis) from China were analyzed and compared with 4 cultivars of Chinese cabbage (Brassica rapa L. ssp. pekinensis) popular in Korea. Leaves were separated into green parts (GP) and white parts (WP) for the analyses. The moisture and ash content in the 14 new cultivars of pak choi were not significantly different from the currently popular cultivars of Chinese cabbage. In addition, the levels of vitamin C and E were very similar between the two kinds of Brassica rapa. In contrast, the overall mineral content was higher in the new pak choi cultivars. Specifically, minerals important for human health, calcium and magnesium, were significantly greater in pak choi cultivars (calcium GP 2.57, WP 2.04; magnesium GP 0.422, WP 0.301 mg/g fresh weight) compared to currently popular cultivars (calcium GP 0.805, WP 0.477; magnesium GP 0.244, WP 0.101 mg/g fresh weight). Although the content of reducing sugars was similar, cellulose content (which correlates with the hardness of plant tissue) was four times higher in the new pak choi cultivars compared to currently popular cultivars. These results demonstrate that the new pak choi cultivars have superb nutritional benefits for human health and could be a good food source as a daily staple vegetable.
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Davaabayar Ganchimeg,Sanghyun Ahn,Minyeong Gong Korea Information Processing Society 2024 Journal of information processing systems Vol.20 No.2
The multi-hop wireless sensor network (WSN) suffers from energy limitation and eavesdropping attacks. We propose a simple and energy-efficient convergecast mechanism using inter-flow random linear network coding that can provide confidentiality to the multi-hop WSN. Our scheme consists of two steps, constructing a logical tree of sensor nodes rooted at the sink node, with using the Bloom filter, and transmitting sensory data encoded by sensor nodes along the logical tree upward to the sink where the encoded data are decoded according to our proposed multi-hop network coding (MHNC) mechanism. We conducted simulations using OMNET++ CASTALIA-3.3 framework and validated that MHNC outperforms the conventional mechanism in terms of packet delivery ratio, data delivery time and energy efficiency.
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간치멕 ( Ganchimeg Gantumur ),곽영순 ( Youngsun Kwak ),차희영 ( Heeyong Cha ) 한국과학교육학회 2020 한국과학교육학회지 Vol.40 No.6
This study compared and analyzed the contents of secondary earth science curriculum in Mongolia and South Korea to check the contents of earth science education in both countries and to prepare basic data necessary for future earth science curriculum revisions. The research questions of this study are: first, to understand the changes and current operating conditions of earth science curriculum in both countries, to compare and analyze with other foreign cases, and second, to compare and analyze the contents of earth science and curriculum in both countries. The TIMSS evaluation framework is used to compare and analyze the earth science-related contents included in the science curriculum of middle schools. For analyzing the contents of high school, the contents of NGSS in the United States and the earth science curriculum contents of high schools in South Korea were mixed and the analysis frameworks were created and validated by experts. As a result of the study, countries that follow the Russian-style education system did not organize and operate earth science as an independent science subject, and deal with earth science-related content in the natural geography area of the geography subject. The earth science contents covered in middle school science curriculum in both countries, 18 of the 27 content elements of the TIMSS content analysis framework were matched in Mongolia and 20 in South Korea. In high school curriculum, the contents of earth science in Mongolia were described more briefly and not covered than in South Korea. In particular, the Mongolian geography curriculum dealt with many environmental issues. The emphasis on the operation method of the earth science curriculum in Mongolia and the contents related to the environment can be used as a reference when developing an interdisciplinary integrated curriculum of science and social studies in South Korea.
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