• The Transactions of the Korean Institute of Electrical Engineers C
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• v.53 no.8
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• pp.407-414
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• 2004

In this paper, a new gray scale expression method that divides the scan lines into multiple blocks is suggested. The proposed method can drive 16 sub-fields per 1 TV field in the panel with XGA ($1366{\times}768$) resolution. The on and off states of even subfields depend on the condition of odd subfields. The write address mode is used in the odd subfields, while the erase address mode is used in the even subfields. Because the ramp reset pulse is applied every 2 sub-fields, both the contrast ratio and the dynamic voltage margin are sufficiently obtained in comparison with previous AWD (Address While Display) methods. In realizing 16 subfields, shortening the scan time in the erase address period was important. The X bias voltage in the erase address period affected the minimum address voltage but did not the delay time of the address discharge. The delay time of the address discharge was affected by the address voltage and the time interval between the last sustain discharge and the scanning time. We also evaluated the dynamic false contour. New method shows an improved image quality in horizontal moving, but discontinuous lines were observed at the boundaries of each block in vertical moving

• Journal of Internet Computing and Services
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• v.17 no.2
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• pp.29-37
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• 2016

Humans develop and maintain relationship through communication. Communication is largely divided into verbal communication and non-verbal communication. Verbal communication involves the use of a language or characters, while non-verbal communication utilizes body language. We use gestures with language together in conversations of everyday life. Gestures belong to non-verbal communication, and can be offered using a variety of shapes and movements to deliver an opinion. For this reason, gestures are spotlighted as a means of implementing an NUI/NUX in the fields of HCI and HRI. In this paper, using Kinect and the geometric features of the hand, we propose a method for recognizing the number of fingers and detecting the hand area. A Kinect depth image can be used to detect the hand region, with the finger number identified by comparing the distance of outline and the central point of a hand. Average recognition rate for recognizing the number of fingers is 98.5%, from the proposed method, The proposed method would help enhancing the functionality of the human computer interaction by increasing the expression range of gestures.

• Proceedings of the KIEE Conference
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• 2006.10c
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• pp.381-384
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• 2006

PDP is watched as a wall-mounted flat displayer for merits, such as ability to visual maximize and natural color reproduction. But it is more necessary to research video quality why PDP is competing with another displayer. This paper is explaned HDL software architecture implementaion for PDP test-bed module and producing board using FPGA to research 42" PDP video quality.

• Proceedings of the IEEK Conference
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• 2003.11a
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• pp.23-26
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• 2003

In this work. we propose an algorithm for detecting and compensating dynamic false contours in plasma display panels (PDPs). First, we detect the candidate pixels, which are likely to be corrupted by false contours, and merge those pixels into several regions. Second, we estimate the motion vectors of the selected regions. Finally, based on the motion information. we modify the luminance values of the pixels in the regions to alleviate the effects of false contours. Simulation results demonstrate that the proposed algorithm efficiently reduces dynamic false contours at low computational complexity.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.254-259
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• 2000

데이터 웨어하우스는 다양하고 서로 다른 저장소로부터 데이터를 수집하고 통합하는 역할을 담당한다. 그리고 의사결정 지원이나 OLAP 질의에 대한 효과적인 구현을 목적으로 하나 또는 그 이상의 저장소의 데이터에 대한 구체화된 뷰들을 저장 관리한다. 데이터 웨어하우스를 둘러싸고 있는 화제로는 구조, 알고리즘, 그리고 다양한 데이터베이스들 또는 다른 정보 저장소들로부터 데이터를 추출하여 가져와 하나의 저장소(Data Warehouse)에 저장하는 툴들이 있다. 최근 몇 년간 데이터 웨어하우스는 데이터베이스 업계에서 두드러진 분야로 성장하였다. 그러나 데이터베이스 연구 공동체는 제한되어 왔다. 본 논문에서는 일반적인 데이터 웨어하우스 구조의 윤곽을 잡고 데이터 웨어하우스를 위해 데이터를 수집하고 변형하고 통합하는 시스템 설계를 목적으로 한다.

• Journal of Digital Contents Society
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• v.15 no.6
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• pp.675-682
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• 2014

Prostate is only an organ of men. To diagnose the disease of the prostate, generally transrectal ultrasound(TRUS) images are used. Detecting its boundary is a challenging and difficult task due to weak prostate boundaries, speckle noise and the short range of gray levels. In this paper a method for automatic prostate segmentation in TRUS images using Support Vector Machine(SVM) is presented. This method involves preprocessing, extracting Gabor feature, training, and prostate segmentation. The speckle reduction for preprocessing step has been achieved by using stick filter and top-hat transform has been implemented for smoothing. Gabor filter bank for extraction of rotation-invariant texture features has been implemented. SVM for training step has been used to get each feature of prostate and nonprostate. Finally, the boundary of prostate is extracted. A number of experiments are conducted to validate this method and results shows that the proposed algorithm extracted the prostate boundary with less than 10% relative to boundary provided manually by doctors.

• The KIPS Transactions:PartB
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• v.14B no.3 s.113
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• pp.191-198
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• 2007

In this paper, we present a marker detection and recognition method from camera image for a disabled person to interact with a server system which can control appliance of surrounding environment. It converts the camera image to a binary image by using multi-threshold and extracts contours of objects in the binary image. After that, it approximates the contours to a list of line segments. It finds rectangular markers by using geometrical features which are extracted from the approximated line segments. It normalizes the shape of extracted markers into exact squares by using the warping technique. It extracts feature vectors from marker image by using principal component analysis and then recognizes the marker. The proposed marker recognition system is robust for light change by using multi-threshold. Also, it is robust for angular variation of camera by using warping technique and principal component analysis. Experimental results show that the proposed method achieves 100% recognition rate at maximum for 21 markers and execution speed of 12 frames/sec.

• Journal of Digital Contents Society
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• v.17 no.6
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• pp.603-611
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• 2016

Generally, the doctors manually delineated the prostate boundary seeing the image by their eyes, but the manual method not only needed quite much time but also had different boundaries depending on doctors. To reduce the effort like them the automatic delineating methods are needed, but detecting the boundary is hard to do since there are lots of uncertain textures or speckle noises. There have been studied in SVM, SIFT, Gabor texture filter, snake-like contour, and average-shape model methods. Besides, there were lots of studies about 2 and 3 dimension images and CT and MRI. But no studies have been developed superior to human experts and they need additional studies. For this, this paper proposes a method that delineates the boundary predicting its texture features and its average distribution on the prostate image. As result, we got the similar boundary as the method of human experts.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.39 no.3
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• pp.1-10
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• 2002

Because of the reduced number of displayable gray levels resulting from inverse gamma correction, images on a plasma display panel (PDP) exhibit undesirable false contours in dark areas. An error diffusion method has been applied to remedy this problem. However, it is computationally expensive and requires large memory resources. This paper proposes a computationally efficient dithering based technique to improve the gray level reproduction capability in dark areas. In the proposed method, multiple dithering masks ate utilized in turn to improve the gray level reproduction in dark areas. Also, in order to reduce undesirable regular patterns generated by the dithering method, positions of threshold values within a given dithering mask are changed. Compared to the error diffusion method, the proposed method requires much less computations and memory resources with a comparable gray level reproduction capability.

• The Journal of Korean Medical History
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• v.14 no.1
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• pp.109-124
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• 2001

"Euibangyoochui" is a great medical encyclopedia composed of 91 symptoms and signs of diseases which classified 150 kinds of reference books. It consisted mainly of fifty thousands of herbal prescriptions and therapeutics but it deals with other treatments like diet therapy, precautions, acupuncture and moxibustion, physical and breathing exercises as well. Unlike other medical references, this book made up these treatments as independent chapters. We tried to catch the meanings and characteristics of each chapters.