• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.36 no.6
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• pp.581-588
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• 2018

The aim of this study is to propose a fine co-registration approach for multi-temporal satellite images acquired from RapidEye, which has an advantage of availability for time-series analysis. To this end, we generate multitemporal ortho-rectified images using RPCs (Rational Polynomial Coefficients) provided with RapidEye images and then perform fine co-registration between the ortho-rectified images. A DEM (Digital Elevation Model) extracted from the digital map was used to generate the ortho-rectified images, and the RNCC (Registration Noise Cross Correlation) was applied to conduct the fine co-registration. Experiments were carried out using 4 RapidEye 1B images obtained from May 2015 to November 2016 over the Yeonggwang area. All 5 bands (blue, green, red, red edge, and near-infrared) that RapidEye provided were used to carry out the fine co-registration to show their possibility of being applicable for the co-registration. Experimental results showed that all the bands of RapidEye images could be co-registered with each other and the geometric alignment between images was qualitatively/quantitatively improved. Especially, it was confirmed that stable registration results were obtained by using the red and red edge bands, irrespective of the seasonal differences in the image acquisition.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.30 no.1
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• pp.21-30
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• 2012

When two bands have different look angle in a space-borne camera system, the registration between two bands is required. The registration cannot be modeled with constant parameters because of dynamic of platform and parallax effect. The parallax effect is caused by terrain relief, hence it causes local distortion between two bands. Therefore, the terrain relief correction in order to reduce the parallax effect is required for better registration result, especially for high resolution image data. Such terrain relief correction also can be applied to image data acquired from multiple detectors with different look angle within a band, which is a one of commonly used configuration for a wider swath in space-borne camera system, in order to reduce the distortion between detectors. The RFM is a popular abstract model in remote sensing field, which gives us the relationship between the image plane and geodetic coordinate system. Therefore, we propose a terrain relief correction method based on the RFM. The experiment showed very promising result.

• Proceedings of the KSRS Conference
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• 2004.10a
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• pp.216-219
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• 2004

In this study, the concept and techniques to generate the level lA, lB and 2A image products have been reviewed. In particular, radiometric and geometric corrections and bands registration used to generate level lA, lB and 2A products have been focused in this study. Radiometric correction is performed to take into account radiometric gain and offset calculated by compensating the detector response non-uniformity. And, in order to compensate satellite altitude, attitude, skew effects, earth rotation and earth curvature, some geometric parameters for geometric corrections are computed and applied. Bands registration process using the matching function between a geometry, which is called 'reference geometry', and another one which is corresponds to the image to be registered is applied to images in case of multi-spectral imaging mode. In order to generate level-lA image products, a simple radiometric processing is applied to a level-0 image. Level-lB image has the same radiometry correction as a level-lA image, but is also issued from some geometric corrections in order to compensate skew effects, Earth rotation effects and spectral misregistration. Level-2A image is generated using some geo-referencing parameters computed by ephemeris data, orbit attitudes and sensor angles. Level lA image is tested by visual analysis. The difference between distances calculated level 1 B image and distances of real coordinate is tested. Level 2A image is tested Using checking points.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.263-265
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• 2003

The computation cost of image registration is affected by searching data size and space. This paper proposes an efficient image registration algorithm that uses multi-resolution wavelet decomposed image to reduce the data size search. The algorithm determines the correlation detection at low resolution on low-pass sub bands of wavelet and generate mask for higher resolution as part of a coarse to fine registration algorithm. The correlation matching is defined for coarse resolution similarity measurement, while mutual information (MI) is used at fine resolution. The results show that the new efficient mask-based algorithm improves computational efficiency and yields robust and consistent image registration results.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.25 no.5
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• pp.383-392
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• 2007

This study focuses on co-registration and band selection, which are one of the pre-processing steps to apply the change detection technique using hyperspectral images. We carried out automatic co-registration by using the SIFT algorithm which performance was already established in the computer vision fields, and selected the bands fur change detection by estimating the noise of image through the PIFs reflecting the radiometric consistency. The EM algorithm was also applied to select the band objectively. Hyperion images were used for the proposed techniques, and non-calibrated bands and striping noises contained in Hyperion image were removed. Throughout the results, we could develop the reliable co-registration procedure which coincided with accuracy within 0.2 pixels (RMSE) for change detection, and verified that band selection depending on the visual inspection could be objective by extracting the PIFs.

• Journal of KIISE:Software and Applications
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• v.28 no.11
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• pp.864-873
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• 2001

In this paper, a new approach to building a registration authority for issuing PKI-based certificates is presented to make the process of identifying an individual more secure and reliable by utilizing human iris recognition technology. The tasks of the proposed system associated with the manipulation of irises except for the general functions of registration authorities can be categorized into three modules, the acquisition of iris images, the registration of iris information, and the verification of users by means of iris patterns. The information among the three modules is safely exchanged through encryption and decryption with a symmetric cryptographic method. As a feature extraction method for a given iris image, a wavelet transform is applied to represent a feature vector with a small dimension of information obtained by subsampling an image corresponding to lower frequency bands successively without loss of information. Through the experiments on human iris recognition technology we proposed and applied to the registration authority, the potential of biometric technology in various applications is confirmed.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.39 no.1
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• pp.13-21
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• 2021

High-resolution satellites such as Kompsat-3 and CAS-500 include optical cameras of MS (Multispectral) and PAN (Panchromatic) CCD (Charge Coupled Device) sensors installed with certain offsets. The offsets between the CCD sensors produce geometric discrepancy between MS and PAN images because a ground target is imaged at slightly different times for MS and PAN sensors. For precise pan-sharpening process, we propose a co-registration process consisting the physical sensor modeling and image matching. The physical sensor model enables the initial co-registration and the image matching is carried out for further refinement. An experiment with Kompsat-3 images produced RMSE (Root Mean Square Error) 0.2pixels level of geometric discrepancy between MS and PAN images.

• Journal of Conservation Science
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• v.28 no.3
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• pp.277-283
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• 2012

This study conducted analysis of paint samples from a streetcar No. 381 (Registration Cultural Property No. 467) to identify the characteristics of the modern paint. The samples were analyzed by Microscopic observation, infrared spectroscopy and SEM-EDS. The upper part is consist of 26 layers and the under part is 29 layers. And the layers were painted various thickness from $10{\mu}m$ to $100{\mu}m$, and confirmed that several color had been used. The putty was used for surface treatment before painting. According to the results of infrared spectroscopy, paint specimens were identified as alkyd resin. Some bands such as C-H and C=O stretcing, aromatic, C-H bending, C-O stretching were found in spectra. Inorganic analysis showed that gold color on the surface was used copper-based paint. And type of the putty was lacquer-putty that was consist of kaolin, talc and zinc white.

• Asian Journal of Turfgrass Science
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• v.13 no.3
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• pp.153-158
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• 1999

'Konwoo', bermudagrass[Cynodon dactylon (L) Pers.] (Patent registration no. 2000-724), a vegetative cultivar, was developed by the Dept. of Horticultural Science, Konkuk University, Seoul. 'Konwoo' was selected in 1997 among 20 lines collected from Korea, Japan, Tiwan, China, U. S. A, and Australia. 'Konwoo' morphologically similar to Tifway 419 was selected due to the erect type, short leaf length($1.3\pm$0.3cm), fine leaf($2.0\pm$0.5mm), rapid establishment and recoverage, many stolon number and high shoot density. When 'Konwoo' was compared to the four other bermudagrass lines at the DNA level using 54 PCR primers, it had the specific bands with primer No. 102, 275, 280, 295, 300, 739 by RAPD analysis.

• Asian Journal of Turfgrass Science
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• v.13 no.3
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• pp.147-151
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• 1999

"Konhee" zoysiagrass[Zoysia matrella (L) Merr.](Patent registration no. 2000-723), a vegetative cultivar, was developed by the Dept. of Horticultural Science, Konkuk University, Seoul. "Konhee" was selected from the cross, ZKV6$\times$ZKV10, in 1997 and F1 seed were produced in the greenhouse in 1996. "Konhee" is superior to the other fine leaf zoysiagrass lines in many traits such as erect type, plant height($8.5\pm$2.0cm), short 3rd stolon length($3.4\pm$0.5cm), dark green, fine leaf($2.3\pm$0.2mm), low first sheath height($0.9\pm$0.2cm), rapid establishment and recoverage, many stolon number, and high shoot density. When "Konhee" was compared to the five other zoysisagrass lines at the DNA level using 35 PCR primers, it had the specific bands with primer No. 740, 544, 765, 772 by RAPD analysis.No. 740, 544, 765, 772 by RAPD analysis.