• Korean Journal of Oriental Medicine
• /
• v.14 no.3
• /
• pp.89-95
• /
• 2008

A tongue shows physiological and clinicopathological changes of inner organs. Visual inspection of a tongue is not only convenient but also non-invasive. To develop an automat ic tongue diagnosis system for an objective and standardized diagnosis, the separation of the tongue are a from a facial image and the detection of coatings, spots and cracks are inevitable but difficult since the colors of a tongue, lips, and skin in a mouth as well as those of tongue furs and body are similar. The propose d method includes preprocessing with down-sampling and edge enhancement, over-segmentation, detecting positions with a local minimum over shading from the structure of a tongue, and correcting local minima or detecting edge with color difference. The proposed method produces the region of a segmented tongue, and then decomposes the color components of the region into hue, saturation and brightness, resulting in classifying the regions of tongue furs(coatings) into kinds of coatings and substance and segmenting them. Spots are detected by using local maxima and the variation of saturation, and cracks are searched by using local minima and the directivity of dark areas in brightness. The results illustrate the segmented region with effective information, excluding a non-tongue region and also give us accurate discrimination of coatings and the precise detection of spots and cracks. It can be used to make an objective and standardized diagnosis for an u-Healthcare system as well as a home care system.

• Journal of the Korean Institute of Oriental Medical Informatics
• /
• v.18 no.1
• /
• pp.78-115
• /
• 2012

Pulse diagnosis has been highly valued in many East Asian medical books, since "Huangdaineijing(黃帝內經)" published. Gigoo-inyoung pulse method(氣口人迎脈法) is one of the four pulse diagnostic methods originally written in"Huangdaineijing(黃帝內經)". At the late 3rd century, "Maijing(脈經)" redefined the positions of Gigoo-inyoung pulse(氣口人迎脈). According to "Maijing(脈經)", both spots were 1fen(分) in front of guan(關) but Gigoo on the right hand and Inyoung on the left hand. At the middle of 13th century, "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" had detailed view points about the manner of reading Gigoo-inyoung pulse. "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" explained clearly the position of 1fen(分) in front of guan(關) by sketch of wrist. The location indicated the border of cun(寸) and guan(關). It also explained clearly corresponding certain cun-guan-chi(寸關尺) with Gigoo-inyoung pulse by sketch. "Euihackipmoon(醫學入門)" is a comprehensive book on medicine written by Lee-Cheon(李梴) in Ming(明) dynasty. In this book, pulse diagnosis is the most emphasized method among the four techniques of diagnosis(四診). Furthermore, it introduces detailed information about Gigoo-inyoung pulse method(氣口人迎脈法) in "Gigoo-inyoungmaekgyole(氣口人迎脈訣)". Lee-Cheon concured in the theory of "Yeongruegumbang(永類鈐方)" and "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" and put a short essay about Gigoo-inyoung pulse named "Gigoo-inyoungmaekgyole(氣口人迎脈訣)" quoted from the two books. Therefore, throughout many chapters of "Euihackipmoon(醫學入門)", Gigoo-inyoung pulse is used in order to distinguish internal damage(內傷) and external contraction(外感). "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" and "Euihackipmoon(醫學入門)" understood Gigoo-inyoung pulse commonly by corresponding certain cun-guan-chi(寸關尺) with Gigoo-inyoung pulse. Therefrom, Gigoo-inyoung pulse can distinguish seven emotions(七情) of internal damage(內傷) or six excesses(六淫) of external contraction(外感).

• The KIPS Transactions:PartC
• /
• v.11C no.5
• /
• pp.659-670
• /
• 2004

Handoff is one of the most important features for the user's mobility in a wireless cellular communication system. It is related to resource reservation at nearby cells. Resource reservation to the new connection point should occur prior to handoff to enable the user to receive the data or services at the new location, at the same level of service as at the previous location. For the efficient resource reservation, mobility prediction has been reported as an effective means to decrease the call dropping probability and to shorten the handoff latency in a wireless cellular environment. A recently proposed algorithm, ZMHB, makes use of the history of the user's positions within the current cell to predict the next cell. But, the prediction of the ZMHB algorithm is found to be 80∼85% accurate for regular and random movements. In this paper, we propose a new improved ZMHB mobility prediction algorithm, which is called Detailed-ZMHB that uses detailed-zone-based tracking of mo-bile users to predict user movements. The effectiveness of the proposed algorithm is then demonstrated through a simulation.

• The Transactions of the Korea Information Processing Society
• /
• v.7 no.8
• /
• pp.2327-2340
• /
• 2000

Existing bulk loading algorithms for multi-dimensional index structures suffer from satisfying both index construction time and retrieval perfonnancc. In this paper, we propose an efficient bulk loading algorithm to construct high dimensional index structures for large data set that overcomes the problem. Although several bulk loading algorithms have been proposed for this purpose, none of them improve both constnlCtion time and search performance. To improve the construction time, we don't sort whole data set and use bisectiou algorithm that divides the whole data set or a subset into two partitions according to the specific pivot value. Also, we improve the search performance by selecting split positions according to the distribution properties of the data set. We show that the proposed algorithm is superior to existing algorithms in terms of construction time and search perfomlance through various experiments.

• Journal of the Korean Geotechnical Society
• /
• v.19 no.1
• /
• pp.21-29
• /
• 2003

In this study, practical guidelines to check the possibility of some lateral movement of piled abutment were investigated. In these tests, both the depth of soft clay and the rate of embankment construction are chosen to examine the effect on lateral soil movements. The depth of soft clay layer varies from 5.2 m to 11.6 m, and the rate of embankment construction has two types : staged construction(1m/30days, 1m/15days) and instant construction. Various measuring instruments such as LVDTs, strain gauges, pressure cells, and pore pressure transducers are installed in designed positions in ordo. to clarify the soil - pile interaction and the short and long term behavior f3. piled bridge abutments adjacent to surcharge loads. The validity of the proposed guidelines by centrifuge test was compared with the observed performance by lateral movement index, F(Japan Highway Public Corporation) and modified I index(Korea Highway Corporation). Based on the results obtained, the critical values off and modified I, as a practical guidelines, are proposed as 0.03 and 2.0, respectively.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.31 no.12C
• /
• pp.1232-1239
• /
• 2006

In video standards such as MPEG-1/2/4 and H.264/AVC, motion estimation / compensation(ME/MC) process causes the most encoding complexity of video encoder. The full search method, which is used in general video codecs, exhausts much encoding time because it compares current macroblock with those at all positions within search window for searching a matched block. For the alleviation of this problem, the fast search methods such as TSS, NTSS, DS and HEXBS are exploited at first. Thereafter, DS based MVFAST, PMVFAST, MAS and FAME, which utilize temporal or spacial correlation characteristics of motion vectors, are developed. But there remain the problems of image quality degradation and algorithm complexity increase. In this thesis, the proposed algorithm maximizes search speed and minimizes the degradation of image quality by determining initial search point correctly and using simple one-dimension search patterns considering motion characteristics of each frame.

• Journal of the Korea Institute of Building Construction
• /
• v.14 no.6
• /
• pp.605-613
• /
• 2014

Recently proposed intelligent images are generating, storing and managing along with existing image information and 5W1H information. Therefore, these vector images can be useful in searching and managing photos taking during building construction and maintenance processes. In addition, when the vector photos, a key to the intelligent image, is linked with BIM, it is possible to find BIM objects by utilizing information included in vector photos. And if the taken vector photo is saved as attributes of the extracted object, the vector photo can be managed as the historical data. Furthermore, this new technology will contribute to make the management of construction information more efficiently. This study is about the development of the technology of extracting BIM objects from vector photo information and managing the attributes of the extracted objects. Also the prototype modules was developed and tested to evaluate the processes of setting reference points, converting coordinate system, calculating positions, and so on. Through these processes, it was confirmed that the possibility of extracting BIM objects from vector photos and of managing attribute data of objects.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.38C no.11
• /
• pp.982-989
• /
• 2013

Omni-directional antennas of UHF-Band are located on the top and bottom side of the Smart UAV in order to connect a link always. Therefore one of each antennas should be connected to a ground antenna. Because the communication link of the omni-directional antennas is influenced by the objectives around aircraft, the clearance of LOS(Line of Sight) should be achieved in order to avoid a loss of link. In this paper, the analysis results on the influence of the complex objectives placed around the antenna on the communication link are presented according to the change of attitude angles. The best positions of antennas are selected based on the electromagnetic analysis using XGTD tool which supports the modeling of antenna pattern. The flight tests of the Smart UAV were successfully performed with the selected antenna position.

• Journal of the Korea Computer Graphics Society
• /
• v.13 no.4
• /
• pp.29-36
• /
• 2007

The objective of this paper is to develop the motion recognition method for the rehabilitation program of the people with physical disabilities. Using the infrared ray LED, this method gets the information of the user's motion and tells the difference between the information we get and the pre-defined information. In order to get the fast recognition and comparison, this method positions the specific coordinates of infrared ray LED in the pre-classified sector which keeps certain distance and angle from the point of origin. The result in our experiment shows the speed over 20 frames per second in every motion, and we are satisfied the rate for the recognition of the motions which is near 98%.

• Journal of the Korea Computer Graphics Society
• /
• v.21 no.3
• /
• pp.17-26
• /
• 2015

In this paper, we explain a volume rendering system for client-server environment. A single GPU-equipped PC works as a server which is based on the ideas that only a few concurrent users use a volume rendering system in a small hospital. As the clients, we used Android mobile devices such as smart phones. User events are transformed to rendering requests by the client application. When the server receives a rendering request, it renders the volume using the GPU. The rendered image is compressed to JPEG or PNG format so that we can save network bandwidth and reduce transfer time. In addition, we perform an event pruning method while a user is dragging the touch to enhance latency. The server compensates the pruning by interpolating the touch positions. As the result, real-time volume rendering is possible for 5 concurrent users on single GPU-equipped commodity hardware.