• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.247-249
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• 2007

Crown parameters are important roles in tree species identification, because the canopy is the aggregate of all the crowns. However, crown measurements with spaceborne image data have remained more difficult than on aerial photographs since trees show more structural detail at higher resolutions. This recognized problem led to the initiation of the research to determine if high resolution satellite image data could be used to identify and classify single tree species. In this paper, shape parameters derived from pixel-based crown area measurements and texture features derived from GLCM parameters in QuickBird image were tested and compared for individual tree species identification. As expected, initial studies have shown that the crown parameters and the canopy texture parameters provided a differentiating method between coniferous trees and broad-leaved trees within the compartment(less than forest stand) for single extraction from spaceborne high resolution image.

• 한국가구학회지
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• 제22권2호
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• pp.126-131
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• 2011

The purpose of this study were to analyze the species and tree-ring dates of coffin woods excavated at Yerim site in Yesan, Chungnam, Korea. We sampled 12 pieces of woods from two coffins. The species of all coffin woods were identified as red pine group, most likely, $Pinus$ $densiflora$. The last rings of both coffins were dated A.D. 1557 and A.D. 1601, respectively. The tree-ring dates indicated that the coffins were made in the late 16th and early 17th century.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제3권4호
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• pp.212-220
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• 2022

DNA markers have been studied and used intensively to identify plant species based on molecular approaches. The genus Medicago belongs to the family Fabaceae and contains 87 species distributed from the Mediterranean to central Asia. Five species of Medicago are known to be distributed in South Korea; however, their morphological characteristics alone cannot distinguish the species. In this study, we analyzed the phylogenetic relationships using collected five species of Medicago from South Korea and 44 taxa nucleotide information from NCBI. The constructed phylogenetic tree using gibberellin 3-oxidase 1 and tRNA^Lys (UUU) to maturase K gene sequences showed the monophyly of the genus Medicago, with five species each forming a single clade. These results suggest that there are five species of Medicago distributed in South Korea. In addition, we designed polymerase chain reaction primers for species-specific detection of Medicago by comparing the plastid sequences. The accuracy of the designed primer pairs was confirmed for each Medicago species. The findings of this study provide efficient and novel species identification methods for Medicago, which will assist in the identification of wild plants for the management of alien species and living modified organisms.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2005년도 한국식물병리학회 임시총회 및 춘계학술발표회
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• pp.40.1-40.1
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• 2005

• 한국멀티미디어학회논문지
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• 제23권9호
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• pp.1155-1163
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• 2020

Deep learning approach is emerging as a new way to improve the accuracy of tree species identification using bark image. However, the approach has not been studied enough because it is confronted with the problem of acquiring a large volume of bark image dataset. This study solved this problem by utilizing a pretrained off-the-shelf DCNN model. It compares the discrimination power of bark features extracted by each DCNN model. Then it extracts the features by using a selected DCNN model and feeds them to a multi-layer perceptron (MLP). We found out that the ResNet50 model is effective in extracting bark features and the MLP could be trained well with the features reduced by the principal component analysis. The proposed approach gives accuracy of 99.1% and 98.4% for BarkTex and Trunk12 datasets respectively.

• Journal of the Korean Wood Science and Technology
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• 제34권6호
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• pp.12-20
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• 2006

전주 마전 유적에서 출토된 회곽묘 1기에 사용된 목재의 수종 식별과 연륜연대 분석을 하였다. 수종 식별 결과, 관재는 모두 소나무속중 소나무류 (적송류)로 동정되었다. 7개의 관재로부터 총 24점의 관편에 대한 연륜연대 분석결과, 6개에 대한 연대를 부여할 수 있었다. 횡대에 쓰인 관재는 수피를 그대로 간직하고 있고 마지막 나이테가 만재까지 완전히 형성되어 있어 1637년 가을에서 1638년 봄 사이에 벌채된 목재로 관을 제작하였음을 알 수 있었다. 다만 벌채후 건조, 저장 기간으로 인하여 연륜연대와 관의 제작 및 매장 연도와는 다소 차이가 있을 수 있다.

• 한국가구학회지
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• 제23권1호
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• pp.95-102
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• 2012

The objective of this study was to conduct the species identification and tree-ring dating of Lotus Pedestal of the Amitabha Statue at Ssangbong-Temple in Hwasun. The six wood blocks used for the Lotus Pedestal were hard pines (Pinus spp.; diploxilon) except one piece which was ginkgo (Ginkgo biloba L.). The lotus leaves surrounding the pedestal body were also made of ginkgo. Tree-ring patterns of 3 blocks were synchronized and a 133 years chronology was made. The chronology was crossdated well with the master chronology of Japanese red pine in South Korea. It dated back to A. D. 1551~1683, i.e. the last ring dated A. D. 1683. Through the estimation of the number of sapwood rings removed during carving, the felling year was calculated A. D. $1704{\pm}10$. The calligraphic writing on the Pedestal indicated that this statue was made in A. D. 1694. Therefore, the accuracy of the tree-ring dating has been proven.

• Journal of the Korean Wood Science and Technology
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• 제39권3호
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• pp.213-220
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• 2011

양평 지평향교 대성전의 목부재에 대한 수종 식별과 연륜연대 분석을 통해 정확한 수종과 건축역사를 조사하고자 하였다. 목부재 49점 가운데 연송인 잣나무류로 식별된 창방 5점과 장여 1점을 제외한 43점은 경송인 소나무류였다. 그리고 5개 목부재에 대한 연륜연대가 측정되었는데, 수피가 있는 대보 1점과 종보 1점의 마지막 연도가 각각 1718년과 1720년(만재 형성 완료)으로 측정되어 "학교등록"에 수차례 기록되었던 지평향교 대성전의 이건이 1720년대에 실행되었거나 이건 없이 대규모의 중수가 있었음을 유추할 수 있었다.

• 한국환경과학회지
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• 제7권3호
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• pp.251-262
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• 1998

A number of illustrated floras are generally used when we want to idenufy a name of a certain tree. This method, however, has not been efficient because it has taken a great deal of time and effort for persons who do not have much knowledge on the group of the plant. In contrast to this method, the use of taxonomical keys is very efficient for finding out the group of a certain plant. But this method Is very dirtficult for non-specialists to understand the taxonomical ternunology and thus has not been of general use. In thins context, this study was conducted to present the efficient way of the group of a certain tree through the computer database by using the brief forms of plant organs. The database consists of effect fields such as form of trunk and evergreen or deciduous, types of leaf and leaf arrangement, existence of price and hair on twig, form of leaf margin, leaf form and venation, existence of hair on leaf surface and petiole, length of leaf and petiole. The 222 species of tree used for landscape architecture were sorted by items of the eight fields. As a result, the 222 species were divided into 185 groups and the one group contains 7species, 2 groups contain 3 species, 27 groups contain 2 species and 155 groups contain only one species. Therefore it is suggested that the use of computer database and illustrated floras is very easy and efficient in identifying a tree.

• Mycobiology
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• 제50권4호
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• pp.231-237
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• 2022

Penicillium species have been actively studied in various fields, and many new and unrecorded species continue to be reported in Korea. Moreover, unidentified and misidentified Korean Penicillium species still exist in GenBank. Therefore, it is necessary to revise the Korean Penicillium inventory based on accurate identification. We collected Korean Penicillium nucleotide sequence records from GenBank using the newly developed software, GenMine, and re-identified Korean Penicillium based on the maximum likelihood trees. A total of 1681 Korean Penicillium GenBank nucleotide sequence records were collected from GenBank. In these records, 1208 strains with four major genes (Internal Transcribed Spacer rDNA region, b-tubulin, Calmodulin and RNA polymerase II) were selected for Penicillium reidentification. Among 1208 strains, 927 were identified, 82 were identified as other genera, the rest remained undetermined due to low phylogenetic resolution. Identified strains consisted of 206 Penicillium species, including 156 recorded species and 50 new species candidates. However, 37 species recorded in the national list of species in Korea were not found in GenBank. Further studies on the presence or absence of these species are required through literature investigation, additional sampling, and sequencing. Our study can be the basis for updating the Korean Penicillium inventory.