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LANDSAT DATA의 영상처리수법(映像處理手法)에 의한 서울-동두천(東豆川) 간(間)의 LINEAMENT 연구(硏究)
강필종 ( Pil Chong Kang ),지광훈 ( Kwang Hoon Chi ),조민조 ( Min Joe Cho ),최영섭 ( Young Sup Choi ) 大韓遠隔探査學會 1985 大韓遠隔探査學會誌 Vol.1 No.1
The study was emphasized on application of the digital image processing techniques for lineament analysis. The major lineament of the study area belongs to Choogaryong faults which many geologists have studied since 1903. Also the lineament is so significant in geological views, because the lineament runs through Seoul area. The several image processing methods such as gradient, Laplacian and spatial filter have been applied, and the spatial filtering is most suitable method for lineament analysis among them. The lineaments distribute predominently in the N20°-30°E trend and N80°-90°W trend which have the conjugated relationship each other, and it coincides with the Gyeongsang conjugate system. The circular structure of study area was developed by cooling circular joint.
열적외선(熱赤外線) 자료(資料)에 의한 고리(古里) 원자력발전소(原子力發電所)의 냉각수(冷却水) 확산(擴散)에 대한 연구(硏究)
강필종 ( Pil Chong Kang ),지광훈 ( Kwang Hoon Chi ) 大韓遠隔探査學會 1987 大韓遠隔探査學會誌 Vol.3 No.2
The study was to analysis the dispersion of the cooling water of Kori atomic power station using thermal infrared data. The dispersion pattern of the cooling water analysis clearly on the LANDSAT TM band 6. It was changed due to tidal current, that is, the cooling water disperses north-eastern direction during the low tide and southwestern direction during the high tide. The relative temperature distribution was mapped through the density slicing method on the images.
강필종 ( Pil Chong Kang ),조민조 ( Min Joe Cho ),이봉주 ( Bong Joo Lee ) 大韓遠隔探査學會 1990 大韓遠隔探査學會誌 Vol.6 No.1
The study is aimed to analize the spectral characteristics of igneous and sedimentary rocks on their reflectance curves obtained from CARY 17-D Spectrophotometer, and correlation between chemical composition and HHRR data. The reflectance is higher in acidic igneous rocks, while lower in basic igneous rocks. Especially acidic plutonic rocks show sharp absorption bands at 1.4 and 1.9μm due to water inclusion in felsic minerals and basic rocks a broad absoption band near 1μm due to Fe++ ion in mafic minerals. Sandstones generally have higher reflectance than siltstones and shales, and show strong absorption at 1.4 and 1.9μm. Arkosic sandstones have lower reflectance at blue band due to Fe+++ ion exsolved from feldspars. The HHRR data have a positive correlation with SiO2 and K2O, while they have a negative correlation with FeO and MgO.
LANDSAT TM자료(資料)에 의한 영남지역(嶺南地域)의 광산대조사(鑛山帶調査) 및 응용방법(應用方法) 개발(開發)(3)
강필종 ( Pil Chong Kang ),지광훈 ( Kwang Hoon Chi ) 大韓遠隔探査學會 1989 大韓遠隔探査學會誌 Vol.5 No.2
The purpose of this study is to investigate ways to use Landsat TM data for geological mapping and minieralized area detection. The study was carried out in Kyongju-Pohang area where toseki and bentonite mines are distributed. Rock samples of 18 granites, andesites, toseki, betonites, sedimentary rocks and altered rocks in the study area were collected for the study. The radiometric measurement of the rock samples were carried out with a radiometer in the laboratory and in the field. The Landsat TM bands 2,3,4,5,7 were used for the measurement. The radiometric characteristics of the samples were mainly processed by the principal component analysis. It was found that the pricipal component analysis of the radiometric characteristics of geologic materials is very useful for the detection of the alteration of rocks and grade of mineral contents. It is expected that the technique can be used in the future for the efficient exploration of minerals in this country and abroad.
양산(梁山)-동래(東萊) 단층(斷層) 지역(地域)의 암석(岩石)에 대한 분광학적(分光學的) 연구(硏究)
강필종 ( Pil Chong Kang ),지광훈 ( Kwang Hoon Chi ) 大韓遠隔探査學會 1987 大韓遠隔探査學會誌 Vol.3 No.1
The study was performed to recognize the most preferable spectral chennels for discriminating geological materials using the portable radiometer. The portable radiometer covers the visible and short infrared regions from approximately 0.4 to 2.5 microns which are coincided with Landsat TM, and the rock samples used for the study are pyrophyllites, andesites, granite, granodiorite and silicified sedimentary rocks which are collected in Yangsan-Dongrae fault area. The analysis of laboratory spectra of the rock samples provides a preliminary basis for determining the wavelength regions showing diagnostic spectral features and for discriminating hydrothermal altered rocks from the unaltered rocks. The measurement of spectral reflectance for the rock samples was carried out in the laboratory which environment condition such as temperature, light sources, and humidity are constant. The analysis of the measured data was based on correlation between the reflectance value of the rock samples, and the follow discriptions are output of the study. 1) Pyrophyllite shows absorption at 0.83μm due to the oxidation of pyrite, and absorption at 2.22 μm due to OH-. 2) The altered rocks have generally higher reflectance than the unaltered rocks. 3) The ratio measurement of pyrophyllites shows strong absorption at band 5/6 and band 6/4(in Landsat TM 5/7, 7/4). The ratio 1/5(Landsat TM 1/5) may be useful to discriminate andesite from the granite.
LANDSAT TM자료(資料)에 의한 광화대조사(鑛化帶調査) 응용기법개발(應用技法開發)
강필종 ( Pil Chong Kang ),지광훈 ( Kwang Hoon Chi ),조민조 ( Min Joe Cho ),최영섭 ( Young Sup Choi ) 大韓遠隔探査學會 1986 大韓遠隔探査學會誌 Vol.2 No.2
TM data, which have better resolution in spatial and spectral than MSS data, were used for this study, and several Image Processing Techniques(IPT) were examined for finding the best IPT to fit to lineament extraction and mineralized zone mapping. The Ryeongnam area was selected as a test area, because the area is one of major mineralized zones in Korea and its hydrothermal alteration zone is wider and deeper than other areas. The spatial filtering method is most optimum one for lineament extraction: that is, the directional spatial filtering is most efficient to detect N-S, E-W direction lineaments on the image, and the high boost filtering can be applied for mapping all direction lineaments. The ratio method was selected for detecting altered zone. It is possible to make several tens combinations in ratio with 7 bands of TM data, but considering spectral characteristics of each band of TM to the geological meterials and vegetation, the band 4/band 3(A), band 5/band 7(B), and B/A ratio methods were chosen among them. The 5/7 ratio image did not show clearly the altered area due to noise from vegetation cover, so the 4/3 ratio image was used for trying to decrease the effect of vegetation. As a result the B/A ratio image showed quite nicely the altered zone of the test area. In conclusion, the spatial filtering is the best image processing techniques for lineament mapping, and the B/A ratio image in TM data is useful for the mineralized zone mapping.
한반도 Lineament와 Circular/Arc Structure 연구
강필종 ( Pil Chong Kang ),조민조 ( Min Joe Cho ),이봉주 ( Bong Joo Lee ) 大韓遠隔探査學會 1991 大韓遠隔探査學會誌 Vol.7 No.2
The study is to analyze and interpret lineaments and circular/arc structures on the Landsat TM images which cover the Korean peninsula and the attached islands except the Ulneung island. The Landsat TM images which cover the Korean territory are 23 scenes, and band 3 and band 5 were selected for the study from seven bands, because the both bands are sensitive on soil moisture and geological materials. Lineament trend anslysis shows Sinian direction(NNE-SSW), Pyeongan direction(NW-SE), Yodong direction(NE-SW), Korean direction(NNW-SSE) and Danyang direction (WNW-ESE) are predominant lineament trends of Korea. Circular/arc structures can be devided into four categories according to their origin; 1) volcanic activity origin, 2) granite intrusion oringin, 3) structural origin and 4) the others.