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The Performance Analysis of Digital Watermarking based on Merging Techniques
Batgerel Ariunzay,추형석,안종구 한국융합신호처리학회 2011 융합신호처리학회 논문지 (JISPS) Vol.12 No.3
Even though algorithms for watermark embedding and extraction step are important issue for digital watermarking, watermark selection and post-processing can give us an opportunity to improve our algorithms and achieve higher performance. For this reason, we summarized the possibilities of improvements for digital watermarking by referring to the watermark merging techniques rather than embedding and extraction algorithms in this paper. We chose Cox's function as main embedding and extraction algorithm, and multiple barcode watermarks as a watermark. Each bit of the multiple copies of barcode watermark was embedded into a gray-scale image with Cox's embedding function. After extracting the numbers of watermark, we applied the watermark merging techniques; including the simple merging, N-step iterated merging, recover merging and combination of iterated-recover merging. Main consequence of our paper was the fact of finding out how multiple barcode watermarks and merging techniques can give us opportunities to improve the performance of algorithm.
식도 스텐트 이동 및 내구성 시험을 위한 디자인과 실험적 분석
Tumurbaatar Batgerel,Ludwig Erik Aguilar,Felipe Vista IV,양승현,박찬희,김철생 제어·로봇·시스템학회 2019 제어·로봇·시스템학회 논문지 Vol.25 No.2
A stent fatigue and migration testing device was designed based on the mathematical analysis of fatigue mechanism of an esophageal stent and esophageal motility, in which the esophageal stent was assumed to be under simulated in vivo peristaltic movement. A system simulating an esophageal tube movement was developed using Arduino MEGA and LabVIEW LIFO interface. The precise detection of the esophageal stent migration model was done by combining camera image processing analysis and Flexible Pressure Sensor (FPS). An Arduino MEGA2560 was used as the control board for the real-time monitoring of non-vascular esophageal stents while a LabVIEW based software was designed to monitor in real time the FPS and Flexible Bend Sensor (FBS) as well as the image processing for the stent fatigue/migration testing. Experimental results verified that the system can test for a stent’s fatigue life and the corresponding recorded data can be used for optimizing esophagus design. The proposed system can be further upgraded to be able to evaluate other types of stents for non-vascular applications as well as stents that is made from experimental materials.
The Performance Analysis of Digital Watermarking based on Merging Techniques
Ariunzaya, Batgerel,Chu, Hyung-Suk,An, Chong-Koo The Korea Institute of Convergence Signal Processi 2011 융합신호처리학회 논문지 (JISPS) Vol.12 No.3
Even though algorithms for watermark embedding and extraction step are important issue for digital watermarking, watermark selection and post-processing can give us an opportunity to improve our algorithms and achieve higher performance. For this reason, we summarized the possibilities of improvements for digital watermarking by referring to the watermark merging techniques rather than embedding and extraction algorithms in this paper. We chose Cox's function as main embedding and extraction algorithm, and multiple barcode watermarks as a watermark. Each bit of the multiple copies of barcode watermark was embedded into a gray-scale image with Cox's embedding function. After extracting the numbers of watermark, we applied the watermark merging techniques; including the simple merging, N-step iterated merging, recover merging and combination of iterated-recover merging. Main consequence of our paper was the fact of finding out how multiple barcode watermarks and merging techniques can give us opportunities to improve the performance of algorithm.
Tumurbaatar Batgerel,Afeesh Rajan Unnithan,박찬희,김철생 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.4
This study introduces a new design of electromagnetic manipulation (EMM) system for wireless control of magnetic robots and magnetic nanoparticles for biomedical applications. It can generate a high-gradient magnetic field in the desired direction and forms the ponderomotive force distribution which allows the motion of magnetic robots in the specified direction. The real time microscopic-video supported by the LabVIEW vision system, the detection of object function through NI-Vision Assistant and tracking function through Math-Script node in the LabVIEW simulation. The motion speed and direction of the magnetic robotics/ nanoscale material can also be manipulated using EMM system and Joystick controller.
Compact Broadband Microstrip Crossover With Isolation Improvement and Phase Compensation
Soon Young Eom,Batgerel, Ariunzaya,Minz, Laxmikant IEEE 2014 IEEE microwave and wireless components letters Vol.24 No.7
<P>In this letter, we present a broadband microstrip crossover structure in two different configurations. Both structures have compact size, i.e., less than 10 mm × 10 mm. Across the measured band from dc to 10 GHz, the structure 1 has less than 1 dB insertion loss, more than 20 dB return loss and at least 23.3 dB isolation. Within the same band, the structure 2 has less than 1 dB insertion loss, more than 22 dB return loss and at least 18.9 dB isolation. Phase difference between two paths in both structures is kept in less than 5 <SUP>°</SUP>.</P>