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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korea Multimedia Society
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Korea Multimedia Society
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Volume & Issues
Volume 14, Issue 12 - Dec 2011
Volume 14, Issue 11 - Nov 2011
Volume 14, Issue 10 - Oct 2011
Volume 14, Issue 9 - Sep 2011
Volume 14, Issue 8 - Aug 2011
Volume 14, Issue 7 - Jul 2011
Volume 14, Issue 6 - Jun 2011
Volume 14, Issue 5 - May 2011
Volume 14, Issue 4 - Apr 2011
Volume 14, Issue 3 - Mar 2011
Volume 14, Issue 2 - Feb 2011
Volume 14, Issue 1 - Jan 2011
Selecting the target year
Efficient High Quality Volume Visualization Using Cardinal Interpolation
Kye, Hee-Won ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 339~347
DOI : 10.9717/kmms.2011.14.3.339
As the volume visualization has been applied to render medical datasets, there has been a requirement to produce high quality images. Even though nice images can be generated by using previous linear filter, high order filter is required for better images. However, it takes much time for high order resampling, so that, overall rendering time is increased. In this paper, we perform high quality volume visualization using the cardinal interpolation. By enabling the empty space leaping which reduces the number of resampling, we achieve the efficient visualization. In detail, we divide the volume data into small blocks and leap empty blocks by referring the upper and lower bound value for each block. We propose a new method to estimate upper and lower bound value of for each block. As the result, we noticeably accelerated high quality volume visualization.
Automatic prostate segmentation method on dynamic MR images using non-rigid registration and subtraction method
Lee, Jeong-Jin ; Lee, Ho ; Kim, Jeong-Kon ; Lee, Chang-Kyung ; Shin, Yeong-Gil ; Lee, Yoon-Chul ; Lee, Min-Sun ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 348~355
DOI : 10.9717/kmms.2011.14.3.348
In this paper, we propose an automatic prostate segmentation method from dynamic magnetic resonance (MR) images. Our method detects contrast-enhanced images among the dynamic MR images using an average intensity analysis. Then, the candidate regions of prostate are detected by the B-spline non-rigid registration and subtraction between the pre-contrast and contrast-enhanced MR images. Finally, the prostate is segmented by performing a dilation operation outward, and sequential shape propagation inward. Our method was validated by ten data sets and the results were compared with the manually segmented results. The average volumetric overlap error was 6.8%, and average absolute volumetric measurement error was 2.5%. Our method could be used for the computer-aided prostate diagnosis, which requires an accurate prostate segmentation.
Car Engine Sealing Inspection System Based on Analysis of Difference Image
Choi, Sang-Bok ; Ban, Sang-Woo ; Kim, Ki-Taeg ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 356~367
DOI : 10.9717/kmms.2011.14.3.356
In this paper, we proposed a new car engine sealing inspection system based on image processing and understanding. The car engine sealing inspection plays very important role for protecting leakage caused by inappropriate sealing, which is a crucial point for productivity of car engines. The proposed inspection system has been aimed to enhance the previously proposed sealing inspection systems based on image processing, which have high computation complexity and low performance for correctly inspecting some contamination by oil with similar color with that of sealing. Moreover, the previously proposed system has a difficulty in installing the camera system on the sealing machine. The proposed system considers a difference of images before and after sealing obtained from one static camera. By utilizing a difference of images, the proposed system shows very robust performance using a proposed simple depth checking algorithm for some contamination cases by oil with similar color with that of sealing and the total inspection system is simple and cheap to implement. According to the experiments conducted in a real car product line, the proposed inspection system shows better inspection performance and needs smaller implementation cost than three other previously proposed system working in current car sealing inspection systems.
FPGA Design of a SURF-based Feature Extractor
Ryu, Jae-Kyung ; Lee, Su-Hyun ; Jeong, Yong-Jin ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 368~377
DOI : 10.9717/kmms.2011.14.3.368
This paper explains the hardware structure of SURF(Speeded Up Robust Feature) based feature point extractor and its FPGA verification result. SURF algorithm produces novel scale- and rotation-invariant feature point and descriptor which can be used for object recognition, creation of panorama image, 3D Image restoration. But the feature point extraction processing takes approximately 7,200msec for VGA-resolution in embedded environment using ARM11(667Mhz) processor and 128Mbytes DDR memory, hence its real-time operation is not guaranteed. We analyzed integral image memory access pattern which is a key component of SURF algorithm to reduce memory access and memory usage to operate in c real-time. We assure feature extraction that using a Vertex-5 FPGA gives 60frame/sec of VGA image at 100Mhz.
Visual Information Selection Mechanism Based on Human Visual Attention
Cheoi, Kyung-Joo ; Park, Min-Chul ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 378~391
DOI : 10.9717/kmms.2011.14.3.378
In this paper, we suggest a novel method of selecting visual information based on bottom-up visual attention of human. We propose a new model that improve accuracy of detecting attention region by using depth information in addition to low-level spatial features such as color, lightness, orientation, form and temporal feature such as motion. Motion is important cue when we derive temporal saliency. But noise obtained during the input and computation process deteriorates accuracy of temporal saliency Our system exploited the result of psychological studies in order to remove the noise from motion information. Although typical systems get problems in determining the saliency if several salient regions are partially occluded and/or have almost equal saliency, our system is able to separate the regions with high accuracy. Spatiotemporally separated prominent regions in the first stage are prioritized using depth value one by one in the second stage. Experiment result shows that our system can describe the salient regions with higher accuracy than the previous approaches do.
A Winter Road Weather Information System Using Ubiquitous Sensor Network
Yoon, Geun-Young ; Kim, Nam-Ho ; Choi, Hwang-Kyu ; Jung, Do-Young ; Choi, Shin-Hyeong ; Kim, Gi-Taek ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 392~402
DOI : 10.9717/kmms.2011.14.3.392
Snow fall and icing on traffic roads in the winter season cause not only inconvenience but unexpected traffic accidents, so the proper measures are needed. The existing road information system is being installed for steep slope roads in mountain areas, however, it is not widely adopted because it is too expensive. In this paper, a novel and cost-effective road weather information system especially for snow fall and icing on roads is proposed. The system consists of digital temperature and relative humidity sensor, infrared temperature sensor, ultrasonic sensor, CMOS camera, and two types of control/communication board for ubiquitous sensor network to send the data to server. The server program including the decision making method with received data is also described. Experimental results are provided to prove the feasibility of the proposed system.
Digital Image Watermarking Technique using Scrambled Binary Phase Computer Generated Hologram in Discrete Cosine Transform Domain
Kim, Cheol-Su ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 403~413
DOI : 10.9717/kmms.2011.14.3.403
In this paper, we proposed a digital image watermarking technique using scrambled binary phase computer generated hologram in the discrete cosine transform(DCT) domain. For the embedding process of watermark. Using simulated annealing algorithm, we would generate a binary phase computer generated hologram(BPCGH) which can reconstruct hidden image perfectly instead of hidden image and encrypt it through the scramble operation. We multiply the encrypted watermark by the weight function and embed it into the DC coefficients in the DCT domain of host image and an inverse DCT is performed. For the extracting process of watermark, we compare the DC coefficients of watermarked image and original host image in the DCT domain and dividing it by the weight function and decrypt it using descramble operation. And we recover the hidden image by inverse Fourier transforming the decrypted watermark. Finally, we compute the correlation between the original hidden image and recovered hidden image to determine if a watermark exits in the host image. The proposed watermarking technique use the hologram information of hidden image which consist of binary values and scramble encryption technique so it is very secure and robust to the various external attacks such as compression, noises and cropping. We confirmed the advantages of the proposed watermarking technique through the computer simulations.
Top and Bottom Symmetrical Loop Antenna for Multi-media Devices
Shin, Cheon-Woo ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 414~422
DOI : 10.9717/kmms.2011.14.3.414
The paper is for top and bottom symmetrical phase controlled loop antenna using for multi-media devices. We developed a top and bottom phase control loop pattern arrangement methods for loop antenna in mobile devices like as a cell phone and PCS, WCDMA. In the loop antenna pattern, arrange close adhesive the loop antenna pattern
cycle in wave length, the radiated electro-magnetic wave from close adhesive loop pattern in
become to coherent wave than the phase controlled loop antenna has high efficiency and high radiation gain. To acquire a wide band width on phase controlled loop antenna, we arrange a top and bottom symmetrical architecture loop pattern that bas a
wave length in each layer. Top and bottom each layer bas a U form pattern separated
wave length each other. This architecture cause a well balanced electro-magnetic flow control that acquired wide bandwidth resonance response in loop pattern antenna. In experiment, we designed a WCDMA mobile multi-media antenna in
area thickness 0.2mm, in that passive experiment the radiation efficiency is over 50% and over 0dBi radiation average gain was acquired, in the active experiment in real multi-media device we acquired -4dBi average gain and 43% transmit/receive efficiency.
Relay Cooperative Transmission Scheme for Distributed MAC Protocol-Based Logistic Applications
Joo, Yang-Ick ; Hur, Kyeong ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 423~432
DOI : 10.9717/kmms.2011.14.3.423
In a warehouse, because there exist frequent changes of stock status and the quality of some contents are influenced by the environment such as temperature, fast and accurate management of the warehouse`s environment is very important for Warehouse Management Systems (WMS). However, due to the absence of a unified standard for the communication protocol between RFID nodes, the connection between RFID nodes can be broken in case of movement of a RFID reader to a region with a different protocol. Moreover, centralized MAC schemes for RFID communications in previous studies have severe problems. For an example, if a cluster header disappears from the cluster due to the cluster header`s movement or bad channel conditions, the RFID member nodes of the cluster waste lots of time and energy to re-elect a new cluster header. Therefore, in this paper, we propose a WiMedia Distributed MAC (D-MAC) scheme for RFID communications and its cooperative relay transmission scheme for WMS applications Simulation results show performance improvement at the RFID node by using the proposed cooperative relay transmission scheme.
Design and Implementation of Outdoor Positioning System Using MSS Mechanism & Wireless AP characteristic
Lee, Hyoun-Sup ; Kim, Jin-Deog ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 433~439
DOI : 10.9717/kmms.2011.14.3.433
The positioning system based on wireless AP collects AP information distributed in the real world, stores it into database, and measures the position objects by comparing with searched AP information. The existing fingerprinting method is a probabilistic modeling method that acquires much of the data collected from one location upon database composition, and stores the average of the data for the sake of use it in positioning objects. Using the average value, however, may cause the probability of errors Such errors are fatal weaknesses for services based on the accurate position. This paper described the characteristics and problems of the previously used wireless AP positioning system, and proposed a method of using the AP DB and an MSS mechanism for outdoor positioning in order to solve the aforementioned problems. And the results obtained from experimental tests showed that the proposed method achieved very low error rate(27%) compared with the existing method.
Implementation of OpenGL SC Emulation Library over OpenGL
Baek, Nak-Hoon ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 440~448
DOI : 10.9717/kmms.2011.14.3.440
The needs for the OpenGL-family of the rendering library standards are highly increasing, especially for the graphical human-machine Interface on the various systems including smart phones and personal information devices. Additionally, in the case of safety-critical market for avionics, military, medical and automotive applications, OpenGL SC, the safety critical profile of the OpenGL library plays the major role for the graphical interfaces. In this paper, we represent our OpenGL SC emulation library on the OpenGL 1.x rendering pipeline which is widely available on the existing embedded systems, to provide the features of OpenGL SC standard cost-effectively. Our method can provide the OpenGL SC features at the low development cost on the embedded systems, and its implementation is also one of the fundamental elements for the emulation of embedded systems in the PC environment. Our final result now works on both of Linux-based and VxWORKS systems, showing correct execution results at the reasonable speed.
Design and Implementation of Simulation Program for CPU Scheduling Operating Systems
Jeong, Seong-Kyun ; Lee, Samuel Sang-Kon ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 449~461
DOI : 10.9717/kmms.2011.14.3.449
In the field of computer science, operating system concept is taught in university, but we now teach it in the middle and/or high school. Computer is also taught not only in college but also in middle and high school. If we look up the education of computer that is trained in school, basic principles or core techniques of computer science is educated only with its theory. If the theoretical education of computer science is just trained, sometimes students are not interested in it because of lack of shortage of mass media. Therefore, we could say that it is important that the computer education features a diverse range of media, including prints, paintings, sculpture, digital photographs, mixed media, and a simulation program. For all this reason, we design and implement a program for simulation with computer operating systems especially, CPU scheduling. There are many CPU scheduling algorithms we suggest to make students understand scheduling with some different examples in practical use. In this paper, we practically propose a new approach to be used with a study tool to make a motivation for students. We design a simulation program for teaching computer operation systems to show CPU scheduling and we implement a program to make use of comparison of FCFS, SJFS, PS, and RR scheduling algorithms. With our simulation program we present a comparative analysis between scheduling algorithms could be possible.
Retargetable Instruction-Set Simulator for Energy Consumption Monitoring
Ko, Kwang-Man ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 462~470
DOI : 10.9717/kmms.2011.14.3.462
Retargetability is typically achieved by providing target machine information, ADL, as input. The ADL are used to specify processor and memory architectures and generate software toolkit including compiler, simulator, etc. Simulator are critical components of the exploration and software design toolkit for the system designer. They can be used to perform diverse tasks such as verifying the functionality and/or timing behavior of the system, and generating quantitative measurements(e.g., power energy consumption) which can be used to aid the design process. In this paper, we generate the energy consumption estimation simulator through ADL. For this goal, firstly, we describes the energy consumption estimation and monitoring informations on the ADL based on EXPRESSION. Secondly, we generate the energy estimation and monitoring simulation library and then constructs the simulator, RenergySim. Lastly, we represent the energy estimations results for MIPS R4000 ADL description. From this subjects, we contribute to the efficient architecture developments and prompt SDK generation through programmable experiments in the field of mobile software development.
A Study on the Delivery Systems of Teaching and Learning Contents for Education System Reform of Developing Countries
Kim, Myong-Hee ; Park, Man-Gon ;
Journal of Korea Multimedia Society, volume 14, issue 3, 2011, Pages 471~479
DOI : 10.9717/kmms.2011.14.3.471
The world has witnessed a phenomenal growth in information and communication technologies (ICT). The development of new broadband communication services convergence of telecommunication with computers and recent developments in the field of communication protocol have fostered challenges as well as offerings in the wide-ranging use of ICT to support the creation of dynamic and interactive teaching and learning environment. By emergence of ICT, most of education and training institutions are struggling to integrate ICT and education and training systems. It is so important to apply proper delivery systems for utilization of the computerized teaching and learning contents in the classrooms. It will be a preliminary activity for building open and flexible distance teaching and learning systems in developing countries. In this paper, we would like to suggest and recommend the proper delivery systems for utilization of the computerized teaching and learning contents in the classrooms for education sector reform in developing countries.