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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The KIPS Transactions:PartB
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Korea Information Processing Society
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Volume & Issues
Volume 14B, Issue 7 - Dec 2007
Volume 14B, Issue 6 - Oct 2007
Volume 14B, Issue 5 - Oct 2007
Volume 14B, Issue 4 - Aug 2007
Volume 14B, Issue 3 - Jun 2007
Volume 14B, Issue 2 - Apr 2007
Volume 14B, Issue 1 - Feb 2007
Selecting the target year
Development of u-Health Care System for Prompt Perception of Emergencies
Jang, Dong-Wook ; Sun, Bok-Keun ; Sohn, Surg-Won ; Han, Kwang-Rok ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 401~406
DOI : 10.3745/KIPSTB.2007.14-B.6.401
This study discusses the development of a u-Health care system that can detect quickly and cope actively with emergent situations of chronic disease patients who lead everyday life. If a patient's emergent situation is detected by personal health care host(PHCH), which is composed of acceleration and vibration sensors, GPS, and CDMA communication module, a text message on the patient's current location is transmitted to the hospital and the guardian's mobile terminal so that they can cope with the situation immediately. Especially, the system analyzes data from sensors by using neural network and determines emergent situations such as syncope and convulsion promptly. The exact location of patients can also be found in the electronic map by using GPS information. The experiments show that this system is very effective to find emergencies promptly for chronic disease patients who cannot take care of themselves and it is expected to save many lives.
New Performance Evaluation Method of Focused Ultrasonic Transducers By Using Virtual 3D Graphic
Lee, Sun-Heum ; Choi, Kwan-Sun ; Kim, Dong-Sik ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 407~412
DOI : 10.3745/KIPSTB.2007.14-B.6.407
The performance of ultrasonic testing systems for industrial or medical purpose largely depends on the performance of ultrasonic transducers. Generally, the information about an ultrasonic transducer performance characteristics are expressed by the ultrasonic R/F signal back from a reflector and its frequency characteristics in the data sheet provided by manufacturers. In case of focused ultrasonic transducers, the two pieces of information can, however, hardly assure that the focused ultrasonic transducer would produce well-focused C-scan images. Therefore, we propose the measured size of focal spot and the reconstructed shape of effective focal zone in the focused sound field as novel measures for the performance evaluation of the focused ultrasonic transducers. The process of getting the both measures of the transducers is conducted by the implemented software including sound field scanning and virtual 3D reconstruction functions which requires the echo of a point reflector. The proposed method could, otherwise impossible in the existing method, effectively and simply distinguish superior ones among many transducers made in the same specification and be also used to detect the performance degradation due to the aging of the transducers. Eventually, the quality of performance of the ultrasonic testing systems for industrial or medical purpose is secured.
A Surface Reconstruction Method from Contours Based on Dividing Virtual Belt
Choi, Young-Kyu ; Lee, Seung-Ha ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 413~422
DOI : 10.3745/KIPSTB.2007.14-B.6.413
This paper addresses a new technique for constructing surface model from a set of wire-frame contours. The most difficult problem of this technique, called contour triangulation, arises when there are many branches on the surface, and causes lots of ambiguities in surface definition process. In this paper, the branching problem is reduced as the surface reconstruction from a set of virtual belts and virtual canyons. To tile the virtual belts, a divide-and-conquer strategy based tiling technique, called the BPA algorithm, is adopted. The virtual canyons are covered naturally by an iterative convex removal algorithm with addition of a center vertex for each branching surface. Compared with most of the previous works reducing the multiple branching problem into a set of tiling problems between contours, our method can handle the problem more easily by transforming it into more simple topology, the virtual belt and the virtual canyon. Furthermore, the proposed method does not involve any set of complicated criteria, and provides a simple and robust algorithm for surface triangulation. The result shows that our method works well even though there are many complicated branches in the object.
3-D OCT Image Reconstruction for Precision Analysis of Rat Eye and Human Molar
Jeon, Ji-Hye ; Na, Ji-Hoon ; Yang, Yoon-Gi ; Lee, Byeong-Ha ; Lee, Chang-Su ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 423~430
DOI : 10.3745/KIPSTB.2007.14-B.6.423
Optical coherence tomography(OCT) is a high resolution imaging system which can image the cross section of microscopic organs in a living tissue with about
resolution. In this paper, we implement OCT system and acquire 2-D images of rat eye and human molar samples especially in the field of opthalmology and dentistry. In terms of 2-D images, we reconstruct 3-D OCT images which give us another inner structural information of target objects. OPEN-GL reduces the 3-D processing time 10 times less than MATLAB.
The clinical usefulness of fat suppression by chemical shift selective(CHESS) pulse in MRI
Han, Man-Seok ; Yang, Hae-Sool ; Jin, Kyung-Soo ; Eo, Ik-Soo ; Cho, Dong-Heon ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 431~436
DOI : 10.3745/KIPSTB.2007.14-B.6.431
Magnetic Resonance Imaging(MRI) has chemical shift phenomenon between fat and water, and the phenomenon has influence on structure enclosed by fat. Strong signals emitted from fat often generate false artefact, which reflects the importance of fat suppression techniques. There have been a number of researches on fat suppression techniques, but using fat suppression method alone in MRI can cause difficultproblems in diagnosis. This paper aims to study a fat suppression method by Chemical Shift Selective saturation(CHESS). This research describes the theoretical background and the experiment on water and fat phantom with MR instruments. In the experiment, CHESS pulse was designed by utilising Matlap program, and the pulse diagram was generated for the Pre-saturation process. The experiment using water and fat phantom was applied to C-spine, L-spine and Breast, and produced successful fat suppression results. This experiment has proved that the CHESSpulse fat suppression is a very helpful technique in diagnosing medical imaging. This method is a robust and useful technique for both clinical and basic investigators..(Experiment with Chungnam national university hospital G.E 1.5T MR)
Motion-Capture-Based Animation in Mobile Embedded Systems Using Motion Capture Database Reduction Technique
Han, Young-Mo ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 437~444
DOI : 10.3745/KIPSTB.2007.14-B.6.437
The objective of this paper is to accommodate the existing motion-capture-based animation to small memories and low computing powers of mobile embedded systems. To use efficiently memories, we propose a paradigm in which a motion capture database is compressed on a PC and so-compressed motion capture database is decompressed little by little on mobile embedded systems and the decompressed data are eliminated right after used. As a compression method for this paradigm we propose an approach that compresses captured motion rendering parameters using a polynomial function fitting method. To enhance its performance we also propose an optimization method for the degree of the polynomial fitting function. Using so-obtained compression method we demonstrate motion-capture-based animation on commercial mobile embedded systems.
Development of the Road Weather Detection Algorithm on CCTV Video Images using Double Decision Trees
Park, Beung-Raul ; NamKoong, Sung ; Lim, Joong-Tae ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 445~452
DOI : 10.3745/KIPSTB.2007.14-B.6.445
We proposed a detection scheme of weather information in CCTV video images in this paper. The scheme obtains the RGB distribution of shiny day and divide a target image into cloud, rain, snow and for RGB distributions. shiny day RGB distribution. Our scheme designed systematically to detection and separation special characteristics of images from complex weather information. Our algorithm has less overhead than the previous methods to use weather database DB at the view of time and space. And our algorithm can be use in real world system with low cost of implementation. Also, our algorithm use informations of temperature, humidity, date, and time to detect the information of weather with high quality.
Extracting curved text lines using the chain composition and the expanded grouping method
Bai, Nguyen Noi ; Yoon, Jin-Seon ; Song, Young-Jun ; Kim, Nam ; Kim, Yong-Gi ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 453~460
DOI : 10.3745/KIPSTB.2007.14-B.6.453
In this paper, we present a method to extract the text lines in poorly structured documents. The text lines may have different orientations, considerably curved shapes, and there are possibly a few wide inter-word gaps in a text line. Those text lines can be found in posters, blocks of addresses, artistic documents. Our method based on the traditional perceptual grouping but we develop novel solutions to overcome the problems of insufficient seed points and vaned orientations un a single line. In this paper, we assume that text lines contained tone connected components, in which each connected components is a set of black pixels within a letter, or some touched letters. In our scheme, the connected components closer than an iteratively incremented threshold will make together a chain. Elongate chains are identified as the seed chains of lines. Then the seed chains are extended to the left and the right regarding the local orientations. The local orientations will be reevaluated at each side of the chains when it is extended. By this process, all text lines are finally constructed. The proposed method is good for extraction of the considerably curved text lines from logos and slogans in our experiment; 98% and 94% for the straight-line extraction and the curved-line extraction, respectively.
Identifying Variable-Length Palindromic Pairs in DNA Sequences
Kim, Hyoung-Rae ; Jeong, Kyoung-Hee ; Jeon, Do-Hong ;
The KIPS Transactions:PartB, volume 14B, issue 6, 2007, Pages 461~472
DOI : 10.3745/KIPSTB.2007.14-B.6.461
The emphasis in genome projects has Been moving towards the sequence analysis in order to extract biological "meaning"(e.g., evolutionary history of particular molecules or their functions) from the sequence. Especially. palindromic or direct repeats that appear in a sequence have a biophysical meaning and the problem is to recognize interesting patterns and configurations of words(strings of characters) over complementary alphabets. In this paper, we propose an algorithm to identify variable length palindromic pairs(longer than a threshold), where we can allow gaps(distance between words). The algorithm is called palindrome algorithm(PA) and has O(N) time complexity. A palindromic pair consists of a hairpin structure. By composing collected palindromic pairs we build n-pair palindromic patterns. In addition, we dot some of the longest pairs in a circle to represent the structure of a DNA sequence. We run the algorithm over several selected genomes and the results of E.coli K12 are presented. There existed very long palindromic pair patterns in the genomes, which hardly occur in a random sequence.