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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 8, Issue 12 - Dec 2005
Volume 8, Issue 11 - Nov 2005
Volume 8, Issue 10 - Oct 2005
Volume 8, Issue 9 - Sep 2005
Volume 8, Issue 8 - Aug 2005
Volume 8, Issue 7 - Jul 2005
Volume 8, Issue 6 - Jun 2005
Volume 8, Issue 5 - May 2005
Volume 8, Issue 4 - Apr 2005
Volume 8, Issue 3 - Mar 2005
Volume 8, Issue 2 - Feb 2005
Volume 8, Issue 1 - Jan 2005
Selecting the target year
3D View Controlling by Using Eye Gaze Tracking in First Person Shooting Game
Lee, Eui-Chul ; Cho, Yong-Joo ; Park, Kang-Ryoung ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1293~1305
In this paper, we propose the method of manipulating the gaze direction of 3D FPS game's character by using eye gaze detection from the successive images captured by USB camera, which is attached beneath HMD. The proposed method is composed of 3 parts. In the first fart, we detect user's pupil center by real-time image processing algorithm from the successive input images. In the second part of calibration, the geometric relationship is determined between the monitor gazing position and the detected eye position gazing at the monitor position. In the last fart, the final gaze position on the HMB monitor is tracked and the 3D view in game is control]ed by the gaze position based on the calibration information. Experimental results show that our method can be used for the handicapped game player who cannot use his (or her) hand. Also, it can increase the interest and immersion by synchronizing the gaze direction of game player and that of game character.
Semantics Accumulation-Enabled Relevance Feedback
Oh, Sang-Wook ; Sull, Sang-Hoon ; Chung, Min-Gyo ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1306~1313
Relevance Feedback(RF), a method to use perceptual feedback in image retrieval, refines a query by the relevance information from a user. However, the user's feedback information is thrown away as soon as a search session ends. So, this paper proposes an enhanced version of RF, which is designed to accumulate human perceptual responses over time through relevance feedback and to dynamically combine the accumulated high-level relevance information with low-level features to further improve the retrieval effectiveness. Experimental results are presented to prove the potential of the proposed RF.
A Technique to Detect the Shadow Pixels of Moving Objects in the Images of a Video Camera
Park Su-Woo ; Kim Jungdae ; Do Yongtae ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1314~1321
In video surveillance and monitoring (VSAM), extracting foreground by detecting moving regions is the most fundamental step. The foreground extracted, however, includes not only objects in motion but also their shadows, which may cause errors in following video image processing steps. To remove the shadows, this paper presents a new technique to determine shadow pixels in the foreground image of a VSAM camera system. The proposed technique utilizes a fact that the effect of shadowing to each pixel is different defending on its brightness in a background image when determining shadow pixels unlike existing techniques where unified decision criteria are used to all pixels. Such an approach can easily accommodate local features in an image and hold consistent Performance even in changing environment. In real experiments, the proposed technique showed better results compared with an existing technique.
Visualization and Image Processing for Measurement of Propagational Velocity of Shear Front
Kim Jae-Won ; Han Sang-Hoon ; Ahn Eun-Young ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1322~1328
The circulation flows passing through the Ekman boundary layer on the rotating disk and transfer the angular momentum into the interior region of the container. Consequently, the circulation enhances the momentum transfer and the interior fluid is divided by a propagating shear front. This investigation focuses on computer vision and image processing technique for analysis of Non-Newtonian Fluids. To visualize marching velocity shear front for the transient flow, a particular shaped particles and light are used. To validate the proposed method, quantitative image are compared with the optical data acquired by a direct measurement of LDV (Laser Doppler Velocimetry).
Design of Edge Detection Algorithm Based on Adaptive Directional Derivative
Kim, Eun-Mi ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1329~1336
We propose an optimal edge detection algorithm adaptive to the various widths of edges. In order to construct this algorithm, we introduce an alternative definition of edge point and generalize the directional derivatives in the pixel space to obtain an extended directional derivatives beyond scaling. The result from applying our algorithm to a 2D image is analyzed comparing to that from the other algorithm.
Gesture Interface for Controlling Intelligent Humanoid Robot
Bae Ki Tae ; Kim Man Jin ; Lee Chil Woo ; Oh Jae Yong ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1337~1346
In this paper, we describe an algorithm which can automatically recognize human gesture for Human-Robot interaction. In early works, many systems for recognizing human gestures work under many restricted conditions. To eliminate these restrictions, we have proposed the method that can represent 3D and 2D gesture information simultaneously, APM. This method is less sensitive to noise or appearance characteristic. First, the feature vectors are extracted using APM. The next step is constructing a gesture space by analyzing the statistical information of training images with PCA. And then, input images are compared to the model and individually symbolized to one portion of the model space. In the last step, the symbolized images are recognized with HMM as one of model gestures. The experimental results indicate that the proposed algorithm is efficient on gesture recognition, and it is very convenient to apply to humanoid robot or intelligent interface systems.
Block Classification of Document Images Using the Spatial Gray Level Dependence Matrix
Kim Joong-Soo ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1347~1359
We propose an efficient block classification of the document images using the second-order statistical texture features computed from spatial gray level dependence matrix (SGLDM). We studied on the techniques that will improve the block speed of the segmentation and feature extraction speed and the accuracy of the detailed classification. In order to speedup the block segmentation, we binarize the gray level image and then segmented by applying smoothing method instead of using texture features of gray level images. We extracted seven texture features from the SGLDM of the gray image blocks and we applied these normalized features to the BP (backpropagation) neural network, and classified the segmented blocks into the six detailed block categories of small font, medium font, large font, graphic, table, and photo blocks. Unlike the conventional texture classification of the gray level image in aerial terrain photos, we improve the classification speed by a single application of the texture discrimination mask, the size of which Is the same as that of each block already segmented in obtaining the SGLDM.
Image Enhancement Using Error Diffusion with APL in PDP
Jang Soo-Wook ; Pyo Se-Jin ; Lee Sung-Hak ; Sohng Kyu-Ik ; Kim Eun-Su ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1360~1368
PDP is the flat panel display, suitable for high definition television because of large-sire and high-brightness. It has many advantages such as fast response, wide viewing angle, low weight, and simple manufacturing process for fabrication. However, there are some disadvantages and one of them is the image quality degradation, which is dependent on the digital signal processing. Although image quality of PDP is improving by many researches and experimentations, it still isn't as good as that of CRT because of various factors. One of them is worm-like pattern generated by an error diffusion process. And the worm-like pattern is severely increased after an APL process. An increased worm-like pattern occur a drop of resolution in image and a change of CCT according to each grayscale. In this paper, a method for improvement of image quality using the error diffusion which considers the APL process is proposed. In the proposed method, the APL process is performed before the error diffusion process. Simulation results showed that the proposed method has better performances for resolution in images and CCT uniformity according to each grayscale than the conventional method.
Vehicle Area Segmentation from Road Scenes Using Grid-Based Feature Values
Kim Ku-Jin ; Baek Nakhoon ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1369~1382
Vehicle segmentation, which extracts vehicle areas from road scenes, is one of the fundamental opera tions in lots of application areas including Intelligent Transportation Systems, and so on. We present a vehicle segmentation approach for still images captured from outdoor CCD cameras mounted on the supporting poles. We first divided the input image into a set of two-dimensional grids and then calculate the feature values of the edges for each grid. Through analyzing the feature values statistically, we can find the optimal rectangular grid area of the vehicle. Our preprocessing process calculates the statistics values for the feature values from background images captured under various circumstances. For a car image, we compare its feature values to the statistics values of the background images to finally decide whether the grid belongs to the vehicle area or not. We use dynamic programming technique to find the optimal rectangular gird area from these candidate grids. Based on the statistics analysis and global search techniques, our method is more systematic compared to the previous methods which usually rely on a kind of heuristics. Additionally, the statistics analysis achieves high reliability against noises and errors due to brightness changes, camera tremors, etc. Our prototype implementation performs the vehicle segmentation in average 0.150 second for each of
car images. It shows
of strictly successful cases from 270 images with various kinds of noises.
A Method for DVDS Based on Weight Value in the Mobile Translation Storage Server
Lim YoungHwan ; Cho Jong-Keun ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1383~1390
Mobile Multimedia Storage Server should provide to store and transfer a data that the number of concurrent datum by Personal Digital Assistant(PDA) requests in real time. simultaneously. But, While the large number of a PDA request connect to MTS (Mobile Translation Storage) server with BottleNeck problem in mobile internet environment by many constraints such as limited bandwidth can be introduced. This paper introduces an optimal method of new DVDS (Dynamic Variable Disk Scheduling) for MTS server which is based on the Weight Value to solve the BottleNeck problems that occur when transfer and store capture images through mounted digital camera on the PDA in real time simultaneously. The comparison with previous research shows that the proposed scheme provides better.
Service Information System(SIS) with Real Time Using RFID and X-Internet in Ubiquitous Environments
Jo Young-Ung ; Lee Eung-Joo ; Kim Dong-Kyu ; Kwon Ki-Ryong ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1391~1402
All industrial Products of today are various demand of customers and are switchovered the manufacturing system of a small quantity batch production. Its life cycle was very shortened. An enterprise is improved to satisfaction with external customers and internal customers of infinity competition time. They can exist on achieving customer satisfaction management. In this paper, a new implementation of service information system (SIS) with real time using RFID and X-Internet in Ubiquitous environments is proposed. The proposed SIS system has Web architecture based on XML and has a new X-Internet environment overcoming limitation of Client/server architecture. The service information system analyze its material data and suppress the same CLAIM creation. The implementation method of real time SIS system using RFID and X-Internet is proposed for contribution of business market reducing F-Cost.
The Synchronization Method of System Time Clock between Encoder and Decoder on MPEG-2 System Layer
Seo Hee-Don ; Kie Jae-Hoon ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1403~1410
The synchronization problem is directly related to the quality of service in multimedia communication and especially in real-time communication. In this study, we found the cause of clock fluctuation between encoder and decoder in MPEG-2 system layer was that the standard decoder design only considered a fixed time delay component. To solve it, we proposed Extended-SRTS algorithm, which uses STC as service clock by synchronizing transport stream. As the result, we can improve the effect of frequency-drift, time-varying-network-jitter and packing-jitter and so on And by virtue of this algorithm, we can make low the dependency of network clock, which makes easy to synchronize and connect transparently at the ends point, we expect the proposed algorithm can be widely applied to the field of real -time multimedia communications.
An Image Watermarking Scheme by Image Fusion in the Frequency Domain
Ahn Chi-Hhyun ; Shin Phil-Sun ; Hwang Jae-Ho ; Hong Choong-Seon ; Lee Dae-Young ; Kim Dong-Hyun ;
Journal of Korea Multimedia Society, volume 8, issue 10, 2005, Pages 1411~1420
This paper presents a robust watermarking approach that the frequency coefficients of the binary logo image are inserted in the DC and each frequency area of the host image for copyright protection of image data. We use the 1 level discrete wavelet transform(DWT) coefficients of 64*64 binary logo image as watermark because the presentation of a recognizable mark is much more convincing than numerical values and allows the opportunity to exploit the human visual system's ability to recognize a pattern. The proposed method makes use of 1-level DWT of the logo image, the DWT coefficients of the logo image are inserted by human visual system(HVS) and region of interest(ROI) in the frequency domain of the host image. Thereby, the detected logo image confirms copyright. Because small size watermark is inserted by HVS and ROI, the results confirm the superiority of the Proposed method on invisibility and robustness.