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Analysis of Foot Strike Pattern During Walking
Phichate Sukklay,Kosin Chamnongthai 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.1
Walking pattern is important for monitoring human walking, and needs to be always monitored during walking. This paper proposes an analysis method of foot strike pattern during walking using force information in order to monitor normal and abnormal gait. In this method, force sensors are installed on the forefoot and rearfoot (heel) foot for receiving walking force information, and the information is sent to processor via bluetooth in order to monitor and alarm in the case of abnormal gait. The information of force is finally used to classify normal and abnormal gaits by artificial neural network. To evaluate performance of the proposed method, experiments with normal and abnormal walking people reveal acceptable results.
Fusion of Face and ID Cards Recognition for Person Identification
Chalermsak Sangkamanee,Kosin Chamnongthai 대한전자공학회 2015 ITC-CSCC :International Technical Conference on Ci Vol.2015 No.6
In this paper we present a range of image processing techniques as potential pre-processing steps, which attempt to improve the performance of the Eigenface method of face recognition. Verification tests are carried out by applying thresholds to gather false acceptance rate (FAR) and false rejection rate (FRR) results from a data set comprised of images that present typical difficulties when attempting recognition, such as strong variations in lighting direction and intensity, partially covered faces and changes in facial expression. Results are compared using the equal error rate (EER), which is the error rate when FAR is equal to FRR. We determine the most successful methods of image processing to be used with eigenface based face recognition, in application areas such as security, surveillance, data compression and archive searching.
Identification of Microaneurysms by Using Spatial Shade Correction and Wavelet Transform
Sukritta Paripurana,Werapon Chiracharit,Kosin Chamnongthai 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
Diabetic Retinopathy (DR) is a serious complication of diabetes. It causes to a loss of vision in diabetic patients. The earlier stage of DR is diagnosed, the more successful the patients will be cured. This paper proposes a method to indentify microaneurysms (MAs) in fundus image by using spatial shade correction and removal of vessels in wavelet domain. The spatial background is estimated and removed from the original image. Vessels are defined as the connected edges in directional wavelet subbands. The inversed transform image without vessel coefficients is then finally correlated to the shade corrected image. The output image show prominent microaneurysms.
Feasibility Analysis of OTA for Active Floating Inductor Based Application
Rawid Banchuin,Roungsan Chaisricharoen,Kosin Chamnongthai,Boonruk Chipipop 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In this research, the methodology for the feasibility analysis of any candidate OTA for being used in any active floating inductors based application, in the practical phenomena, has been proposed. The proposed methodology can accurately determine the feasibility of any candidate OTA before directly applied to the cited active inductor based application for the prevention of the unintentionally using the infeasible one. The up to dated CMOS technology has been focused in the research. According to its simplicity, this methodology has been found to be very convenience since it can be performed even by hand calculation. Hence, the proposed methodology has been found to be both very efficient and versatile.
Linearization of CMOS CCCII with Optimal Design via Geometric Programming
Roungsan Chaisricharoen,Boonruk Chipipop,Kosin Chamnongthai,Kohji Higuchi,Boonchareon Sirinaovakul 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The mixed translinear loop, serving as the input stage of a CMOS CCCII, is analyzed in large signal method to examine the linearity condition, which is simply the matching between NMOS and PMOS loop components. Example configurations, providing linear and nonlinear V-I characteristic of input voltage and current, are simulated in the HSPICE based on the AMS’ 0.35μ CMOS process. The results verify the necessity of matching condition in designing a linear CMOS CCCII. To obtain an optimized design, the geometric programming is utilized based on attained perceptions. A sample requirement, also based on the AMS’ 0.35μ CMOS process, is globally optimized. The obtained solution is simulated in the HSPICE to verify the performances, which are satisfying the requirement quite well.