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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 16, Issue 12 - Dec 2013
Volume 16, Issue 11 - Nov 2013
Volume 16, Issue 10 - Oct 2013
Volume 16, Issue 9 - Sep 2013
Volume 16, Issue 8 - Aug 2013
Volume 16, Issue 7 - Jul 2013
Volume 16, Issue 6 - Jun 2013
Volume 16, Issue 5 - May 2013
Volume 16, Issue 4 - Apr 2013
Volume 16, Issue 3 - Mar 2013
Volume 16, Issue 2 - Feb 2013
Volume 16, Issue 1 - Jan 2013
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Detection of Skin Pigmentation using Independent Component Analysis
Yang, Liu ; Lee, Suk-Hwan ; Kwon, Seong-Geun ; Kwon, Ki-Ryong ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 1~10
DOI : 10.9717/kmms.2013.16.1.001
This paper presents an approach for detecting and measuring human skin pigmentation. In the proposed scheme, we extract a skin area by a Gaussian skin color model that is estimated from the statistical analysis of training images and remove tiny noises through the morphology processing. A skin area is decomposed into two components of hemoglobin and melanin by an independent component analysis (ICA) algorithm. Then, we calculate the intensities of hemoglobin and melanin by using the location histogram and determine the existence of skin pigmentation according to the global and local distribution of two intensities. Furthermore, we measure the area and density of the detected skin pigmentation. Experimental results verified that our scheme can both detect the skin pigmentation and measure the quantity of that and also our scheme takes less time because of the location histogram.
3D Model Reconstruction Algorithm Using a Focus Measure Based on Higher Order Statistics
Lee, Joo-Hyun ; Yoon, Hyeon-Ju ; Han, Kyu-Phil ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 11~18
DOI : 10.9717/kmms.2013.16.1.011
This paper presents a SFF(shape from focus) algorithm using a new focus measure based on higher order statistics for the exact depth estimation. Since conventional SFF-based 3D depth reconstruction algorithms used SML(sum of modified Laplacian) as the focus measure, their performance is strongly depended on the image characteristics. These are efficient only for the rich texture and well focused images. Therefore, this paper adopts a new focus measure using HOS(higher order statistics), in order to extract the focus value for relatively poor texture and focused images. The initial best focus area map is generated by the measure. Thereafter, the area refinement, thinning, and corner detection methods are successively applied for the extraction of the locally best focus points. Finally, a 3D model from the carefully selected points is reconstructed by Delaunay triangulation.
Cluster ing for Analysis of Raman Hyper spectral Dental Data
Jung, Sung-Hwan ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 19~28
DOI : 10.9717/kmms.2013.16.1.019
In this research, we presented an effective clustering method based on ICA for the analysis of huge Raman hyperspectral dental data. The hyperspectral dataset captured by HR800 micro Raman spectrometer at UMKC-CRISP(University of Missouri-Kansas City Center for Research on Interfacial Structure and Properties), has 569 local points. Each point has 1,005 hyperspectal dentin data. We compared the clustering effectiveness and the clustering time for the case of using all dataset directly and the cases of using the scores after PCA and ICA. As the result of experiment, the cases of using the scores after PCA and ICA showed, not only more detailed internal dentin information in the aspect of medical analysis, but also about 7~19 times much shorter processing times for clustering. ICA based approach also presented better performance than that of PCA, in terms of the detailed internal information of dentin and the clustering time. Therefore, we could confirm the effectiveness of ICA for the analysis of Raman hyperspectral dental data.
Advanced Retinex Algorithm for Image Enhancement
Cha, Hyo-Sang ; Hong, Sung-Hoon ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 29~41
DOI : 10.9717/kmms.2013.16.1.029
The digital camera is impossible to preserve the appearance of a scene containing high dynamic range due to a limitations of the sensing hardware. The Retinex was proposed on the purpose to solve these problems. While the Retinex enhances visibility and color constancy, it sometimes suffers from color distortion, halo effect and reduced global contrast. This paper presents an advanced Retinex algorithm working on the YCbCr color coordinate to reduce the processing time and to improve the global contrast and color. Simulation results show that our algorithm significantly reduces the total processing time, and provide the superior result image by improving the global contrast and color consistency as well as by reducing the halo effect around the boundaries.
Correction of Rotated Frames in Video Sequences Using Modified Mojette Transform
Kim, Ji-Hong ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 42~49
DOI : 10.9717/kmms.2013.16.1.042
The camera motion is accompanied with the translation and/or the rotation of objects in frames of a video sequence. An unnecessary rotation of objects declines the quality of the moving pictures and in addition is a primary cause of the viewers` fatigue. In this paper, a novel method for correcting rotated frames in video sequences is presented, where the modified Mojette transform is applied to the motion-compensated area in each frame. The Mojette transform is one of discrete Radon transforms, and is modified for correcting the rotated frames as follows. First, the bin values in the Mojette transform are determined by using pixels on the projection line and the interpolation of pixels adjacent to the line. Second, the bin values are calculated only at some area determined by the motion estimation between current and reference frames. Finally, only one bin at each projection is computed for reducing the amount of the calculation in the Mojette transform. Through the simulation carried out on various test video sequences, it is shown that the proposed scheme has good performance for correcting the rotation of frames in moving pictures.
In-service Real-time and Continuous Objective Video Quality Assessment for DTV Broadcasting
Han, Chan-Ho ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 50~55
DOI : 10.9717/kmms.2013.16.1.050
This article presents a simple and reasonable in-service, real-time, and continuous single-ended objective video quality assessment model for DTV broadcasting using a multiburst signal at the bottom of the transient effect area, similar to Vertical Interval Test Signals. The issue of in-service video-quality monitoring in DTV broadcasting is addressed, and an effective method of quality monitoring is presented. The proposed method is also implemented and tested in a range of situations using a simulated HDTV broadcasting network.
Improved Cluster-Based Routing Protocol Using Paired-header of Cluster in The Mobile Ad-Hoc Network
Kim, ChangJin ; Kim, Wu Woan ; Jang, Sangdong ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 56~66
DOI : 10.9717/kmms.2013.16.1.056
In MANET, the frequent movement of nodes causes the dynamic network topology changes. Therefore, it is required that the routing protocol should be very stable to effectively respond the changes of the network changes. Moreover, the existing cluster-based routing protocol, that is the hybrid approach, has routing delay due to the re-electing of the cluster header. In addition, the routing table of CBRP has all only one hop distant neighbor nodes. PCBRP, proposed in this paper, ties two clusters in one paired cluster to make longer radius. Then the headers of the paired cluster manage and operate corresponding member nodes. In the current CBRP, when the cluster header leaves out the cluster, the delay, due to the re-electing a header, should be occurred. However, in PCBRP, another cluster header of the paired cluster plays the role instead of the left cluster header. This method reduces the routing delay. Concurrently, PCBRP reduces the delay when they route nodes in the paired cluster internally.
An Adaptive Pointing and Correction Algorithm Using the Genetic Algorithm
Jo, Jung-Jae ; Kim, Young-Chul ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 67~74
DOI : 10.9717/kmms.2013.16.1.067
In this paper, we propose the pointing and correction algorithm for optimized performance based on Bluetooth communication. The error from the accelerometer sensor`s output must be carefully managed as the accelerometer sensor is more sensitive to data change compared to that of the gyroscope sensor. Thus, we minimize the noise by applying the Kalman filter to data for each axis from the accelerometer. In addition, we can also obtain effect compensating the hand tremor by applying the Kalman filter to the data variation for x and y. In this study, we extract data through the Quaternion mapping process on data from the accelerometer and gyroscope. In turn, we can obtain a tilt compensation by applying a compensation algorithm with acceleration of the gravity of the extracted data. Moreover, in order to correct the inaccuracy on smart sensor due to the rapid movement of a device, we propose a adaptive pointing and correction algorithm using the genetic approach to generate the initial population depending on the user.
An Embedded Systems Implementation Technique based on Multiple Finite State Machine Modeling using Microcontroller Interrupts
Lee, Sang Seol ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 75~86
DOI : 10.9717/kmms.2013.16.1.075
This paper presents a technique to implement embedded systems using interrupts of the one-chip microcontroller with many peripherals based on a multiple finite state machines model. The multiple finite state machine model utilizes the structure of FSMD used for hardware design and the features of flow control by interrupts. The main finite state machine corresponds to the main program and the sub-state machines corresponds to the interrupt subroutines. Therefore, interrupts from the peripherals can be processed immediately in the sub-state machines. The request and reply variables are used to interface between the finite state machines. Additional operating system is not necessary for the context switching between the main state machine and the sub-state machine, because the flow-control caused by interrupt can be replaced with the switching. An embedded system modeled on multiple finite state machine with ASM charts can be easily implemented by the conversion of ASM charts into C-language programs. This implementation technique can be easily adopted to the hardware oriented embedded systems because of the detail description of the model and the fast response to the interrupt events in the sub-state machine.
Fault Tree Analysis and Fault Modes and Effect Analysis for Security Evaluation of IC Card Payment Systems
Kim, Myong-Hee ; Jin, Eun-Ji ; Park, Man-Gon ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 87~99
DOI : 10.9717/kmms.2013.16.1.087
The demands of IC card payment system has been increased according to the rapid advancement of the IT convergence application technologies. Recently IC card payment systems are in demands of the usage space at anytime and anywhere by developing the wireless communication technology and its related multimedia processing technology. Therefore the security of IC card payment system becomes more important and necessary. There are many fault analysis methods to evaluate the security and safety of information systems according to their characteristics and usages. However, the only assessment method to evaluate the security of information systems is not enough to analyse properly on account of the various types and characteristics of information systems by the progress of IT convergence and their applications. Therefore, this paper proposes an integrative method of the Fault Tree Analysis (FTA) and Fault Modes and Effect Analysis/Criticality (FMEA/C) based on criticality to evaluate and improve the security of IC card payment system as an illustration.
A Design of Mobile e-Book Viewer interface for the Reading Disabled People
Lee, KyungHee ; Kim, TaeEun ; Lee, Jongwoo ; Lim, Soon-Bum ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 100~107
DOI : 10.9717/kmms.2013.16.1.100
As the eBook market grows fast recently, various eBook viewer solutions such as hardware viewers and software readers came out to the market. We can, however, hardly find mobile eBook interfaces for the reading disabled people who have difficulties in reading for their visual impairment or learning disabilities, or dyslexia. An eBook viewer interfaces for the reading disabled people should be carefully and distinctively designed because the reading disabled people cannot use normal versions of eBook viewer. In this paper, we suggest a eBook viewer interface model to make the reading disabled people read eBooks easily. Depending on the type of the reading disabled people: the full blind, the almost blind, the just learning disabled, our model provides an adaptive interface to make them read eBooks effectively. In addition, unlike the existing simple audio books, we also support annotation systems to make the reading disabled people interact with eBook viewer. To show the effectiveness of our model, we implemented an eBook viewer prototype on an android-based mobile device. We are sure that our model and implementation can make the reading disabled people, who is 10% of all the domestic people, read eBooks effectively.
3D Face Modeling from a Frontal Face Image by Mesh-Warping
Kim, Jung-Sik ; Kim, Jin-Mo ; Cho, Hyung-Je ;
Journal of Korea Multimedia Society, volume 16, issue 1, 2013, Pages 108~118
DOI : 10.9717/kmms.2013.16.1.108
Recently the 3D modeling techniques were developed rapidly due to rapid development of computer vision, computer graphics with the excellent performance of hardware. With the advent of a variety of 3D contents, 3D modeling technology becomes more in demand and it`s quality is increased. 3D face models can be applied widely to such contents with high usability. In this paper, a 3D face modeling is attempted from a given single 2D frontal face image. To achieve the goal, we thereafter the feature points using AAM are extracted from the input frontal face image. With the extracted feature points we deform the 3D general model by 2-pass mesh warping, and also the depth extraction based on intensity values is attempted to. Throughout those processes, a universal 3D face modeling method with less expense and less restrictions to application environment was implemented and it`s validity was shown through experiments.