• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.592-595
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• 2008

This paper presents development of automatic image quality register optimization system using mobile TFT-LCD (Thin Film Transistor-Liquid Crystal Display) driver IC and embedded software. It optimizes automatically gamma adjustment and voltage setting registers in mobile TFT-LCD driver IC to improve gamma correction error, adjusting time, flicker noise and contrast ratio. Developed algorithms and embedded software are generally applicable for most of the TFT-LCD modules. The proposed optimization system contains module-under-test (MUT, TFT-LCD module), control program, multimedia display tester for measuring luminance, flicker noise and contrast ratio, and control board for interface between PC and TFT-LCD module. The control board is designed with DSP and FPGA, and it supports various interfaces such as RGB and CPU.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.97-100
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• 2007

Recently, there is developed various antenna's models due to increment of wireless communication the need of quantitative study on antenna's measuring technology gets to highlight. In this paper, we propose algorithm of antenna's edge alignment for making automatic measuring system of antenna's characteristics of near-field measurement system of antenna. The proposed algorithm gets the bottom image of antenna from camera, extracts antenna object, and finds the boundary the object. The proposed algorithm calculates distortion of the object using the extracted boundary and the angle to correct this. The proposed algorithm is applied to the standard gain horn antenna. The results show that antenna's object is efficiently extracted and the angle for correcting the error is calculated.

• The Bulletin of The Korean Astronomical Society
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• v.46 no.1
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• pp.49.2-49.2
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• 2021

천체관측은 무한대 거리에서 오는 광자의 양을 측정하는 분야로 미량의 광자를 측정하기 위하여 측정기의 냉각은 아주 중요한 문제가 되었다. 과거에는 측정기 냉각에 드라이아이스가 사용되어 왔으며, 1980년대에는 액체질소를 이용한 냉각이 주를 이뤘다. 액체질소를 이용한 냉각 방식은 액체질소를 생성하거나 구입하여야 하는 불편함이 있었으며, 주입시 낮은 온도로 인하여 항상 안전사고에 대비하여야 했다. 1990년대 이후 다양한 상업용 CCD의 개발로 인하여 상대적으로 저렴한 CCD를 판매하였으며, 상업용 CCD는 이전 -110℃의 냉각이 아닌 -30℃의 냉각 성능을 보였다. 상업용 CCD는 CCD 칩 내부의 진공 구현이 미비하였으며, 초기 판매시 아르곤 가스 또는 실리카겔 등으로 CCD 칩 내부의 습도를 낮춰왔으나, 구입 후 1~2년이 지나면 점차 가스 누설로 인하여 CCD 칩 내부에 얼음이 생기는 문제가 발생하기 시작하였다. 이번 연구는 CCD 칩 내부 공간에 진공튜브를 삽입하여 실시간 진공상태를 측정하는 한편, 10Torr 이상 진공 도달시 자동으로 내부 공기를 흡입하여 CCD 칩 내부를 항시 10Torr 이하로 유지하도록 개발하였으며, 10Torr 이하의 진공 유지시 습도 99%의 환경에서 최대 냉각인 -35℃를 유지하여도 전혀 얼음이 생기지 않음을 확인하였다. 이번연구로 개발된 자동 진공조절시스템이 각 천문대에서 사용중인 상업용 CCD에 적용된다면, 날씨환경에 관계없이 항상 최대냉각 상태로 천체관측을 진행할 수 있으리라 기대된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.198-203
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• 2019

An adhesive wireless bookbinding machine was designed with optimal motor control and automatic cover insertion for bookbinding. The noise level was improved by modifying the thrust of the machine and changing from a compressor method to an AC induction motor control method. The automatic cover insertion function was added to improve the task speed. Motor and decelerator damage can be caused by sudden braking and acceleration of the motor rotation (clockwise and counter-clockwise), so a buffer-type locational control system was developed to secure stable movement and durability. The complicated internal design was also simplified, and the volume and weight were decreased. The results show that the noise was decreased by 57% from 135 dB to 71.7 dB, and the task speed was decreased by 57% from 18 s to 9.58 s. The automatic cover insertion was designed to supply a maximum of 130 sheets per supply.

• Journal of KIISE:Software and Applications
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• v.36 no.1
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• pp.62-69
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• 2009

The purpose of document summarization is to provide easy and quick understanding of documents by extracting summarized information from the documents produced by various application programs. In this paper, we propose a document summarization method that creates and analyzes a connection graph representing the similarity of keyword lists of sentences in a document taking into account the mean length(the number of keywords) of sentences of the document. We implemented a system that automatically generate a summary from a document using the proposed method. To evaluate the performance of the method, we used a set of 20 documents associated with their correct summaries and measured the precision, the recall and the F-measure. The experiment results show that the proposed method is more efficient compared with the existing methods.

• Journal of the Institute of Convergence Signal Processing
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• v.15 no.4
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• pp.148-154
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• 2014

This paper suggests a new system based on image-processed information which is designed to control traffic light by measuring two-way traffic at the same time with a surveillance camera. With this system, the existing way of using one camera for one lane or loop coil will be improved to the more effective way of using only one camera to monitor a two-way, 8 lane roads statistically. Car images can be detected clearly even in irregular condition because of the background updating in real time. In addition, more accurate measurement is possible to users by selecting extra attention-needed regions. The automatic traffic light controlling algorithm, suggested in this paper, will prevent users and drivers from wasting their time and energy by controlling the number of traffic in advance.

• KIPS Transactions on Software and Data Engineering
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• v.7 no.10
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• pp.377-382
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• 2018

This study deals with internal state and tissue density analysis methods for red ginseng grade determination. For internal measurement of red ginseng, there have been various studies on nondestructive testing methods since the 1990s, It was difficult to grasp the most important inner hole and inside whites in the grading. So in this study, we developed a closed capturing device for infra-red illumination environment, and developed an internal measurement system that can detect the presence and diameter of inner hole and inside whites. Made devices consisted of infrared lights with a high transmission rate of red ginseng in 920 nanometer wave band, a infra-red camera and a Y axis actuator with a red ginseng automatically controlled focus on the camera. The proposed algorithm performs an auto-focus system on the Y-axis actuator to automatically adjust the sharp focus of the object according to the size and thickness. Then red ginseng is rotated $360^{\circ}$ at $1^{\circ}$ intervals and 360 total images are acquired, and reconstructed as a sinogram through Radon transform and Back-projection algorithm was performed to acquire internal images of red ginseng. As a result of the algorithm, it was possible to acquire internal cross-sectional image regardless of the thickness and shape of red ginseng. In the future, if more than 10,000 different shapes and sizes of red ginseng internal cross-sectional image are acquired and the classification criterion is applied, it can be used as a reliable automated ginseng grade automatic measurement method.

• The KIPS Transactions:PartB
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• v.16B no.2
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• pp.141-150
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• 2009

This paper proposes a system that can automatically write singing voices to music notes. First, the system uses Stabilized Diffusion Equation(SIDE) to divide the song to a series of syllabic parts based on pitch detection. By the song segmentation, our method can recognize the sound length of each fragment through clustering based on genetic algorithm. Moreover, this study introduces a concept called 'Relative Interval' so as to recognize interval based on pitch of singer. And it also adopted measure extraction algorithm using pause data to implement the higher precision of song transcription. By the experiments using 16 nursery songs, it is shown that the measure recognition rate is 91.5% and DMOS score reaches 3.82. These findings demonstrate effectiveness of system performance.

• Journal of Apiculture
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• v.34 no.1
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• pp.47-55
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• 2019

Honey bees are a vital part of the food chain as the most important pollinators for a broad palette of crops and wild plants. The climate change and colony collapse disorder (CCD) phenomenon make it challenging to develop ICT solutions to predict changes in beehive and alert about potential threats. In this paper, we report the test results of the bee-counting system which stands out against the previous analogues due to its comprehensive components including an improved dual infrared sensor to detect honey bees entering and leaving the hive, environmental sensors that measure ambient and interior, a wireless network with the bluetooth low energy (BLE) to transmit the sensing data in real time to the gateway, and a cloud which accumulate and analyze data. To assess the system accuracy, 3 persons manually counted the outgoing and incoming honey bees using the video record of 360-minute length. The difference between automatic and manual measurements for outgoing and incoming scores were 3.98% and 4.43% respectively. These differences are relatively lower than previous analogues, which inspires a vision that the tested system is a good candidate to use in precise apicultural industry, scientific research and education.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.250-252
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• 2004

나노 기술의 개발과 마이크로어레이(microarray)의 등장으로 생물학자동을 한번에 보다 라르고 신속하게, 대량의 실험을 처리할 수 있게 되었다. 이와 발 맞추어 마이크로어레이를 이용한 다양한 실험 방법들이 개발되었다. 형광 염료(fluorescence dye)를 이 용한 관찰 방법 이 널리 이용되고 있으나, 관찰되는 형광 염료의 밝기가 실험 환경(pH, 온도)에 매우 민감하게 반응하며, 단백질을 포함한 많은 분자 물질들이 형광을 내지 않기 때문에 마이크로어레이를 이용한 분석 대상 물질들의 개수가 제한을 받는다. 본 논문에서는 직접적인 형광 염료의 사용 없이, SPR(Surface Plasmon Resonance)을 이용한 마이크로어레이 분석 시스템에서 스팟(spot)의 밝기(intensity)를 측정하기 위한 효율적인 전처리 과정을 제안하고자 한다. 전처리 과정은 크게 프로젝티브 왜곡 효과 제거, 스팟의 위치 추적, 스팟의 영역 추출, 정규화 된 스팟의 밝기 측정으로 나누어진다. 특히, 이러한 과정을 거쳐서 측정된 밝기는 반응 유무의 관찰뿐만이 아니라, 실험 물질의 양적인 측정에도 이용되기 때문에 정확한 스팟의 밝기 측정에 중점을 두고자 한다.