• Title/Summary/Keyword: Image Shifting Technique

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Representation of Time within Film Narrative -Focusing on - (영화 내러티브에서의 시간성 표현 -영화 (사랑니)를 중심으로-)

  • Lee, Jee-Heng
    • The Journal of the Korea Contents Association
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    • v.7 no.8
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    • pp.125-133
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    • 2007
  • While films today offer spectacle to the viewers due to the advanced technique, the "Modern Cinema"-a term named by Deleuze- offers spectators an opportunity to think about what they observe and to have various filmic experiences through the shifting of time image within the film narrative, which has been rather neglected as it is just a form in the realm of classic narrative. Originally the shifted time image was a result of thinking about the identity of a film. But it has self-reproduced over and over, and now it has turned into one of cliches that narrative films take. In this sense, a Korean Melodrama "Sarang-ni" is discriminated from other films which take twisted time image as a convention. The film "Sarang-ni", instead of adopting established shifted time image, put us to the confused time arrangement and then it amazingly arouses emotional effect which it initially meant to convey. This journal analyzes how the time representation of operates in the film's narration, and consequently how the form affects the storytelling.

Hardware Implementation of Chaotic System for Security of JPEG2000 (JPEG2000의 보안을 위한 카오스 시스템의 하드웨어 구현)

  • Seo Young-Ho
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.12C
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    • pp.1193-1200
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    • 2005
  • In this paper, we proposed an image hiding method which decreases the amount of calculation encrypting partial data rather than the whole image data using a discrete wavelet transform and a linear scalar quantization which have been adopted as the main technique in JPEG2000 standard and then implemented the proposed algorithm to hardware. A chaotic system was used instead of encryption algorithms to reduce further amount of calculation. It uses a method of random changing method using the chaotic system of the data in a selected subband. For ciphering the quantization index it uses a novel image encryption algorithm of cyclical shifting to the right or left direction and encrypts two quantization assignment method (Top-down coding and Reflection coding), made change of data less. The experiments have been performed with the proposed methods implemented in software for about 500 images. The hardware encryption system was synthesized to find the gate-level circuit with the Samsung $0.35{\mu}m$ Phantom-cell library and timing simulation was performed, which resulted in the stable operation in the frequency above 100MHz.

Improved 3D Shape Measurement Scheme for White Light Phase Shifting Interferometry (백색광 위상천이 간섭계를 위한 개선된 삼차원 형상 측정 방법)

  • Kim, Kyoung-Il;Lee, Dong-Yeol;Ko, Yun-Ho
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.47 no.2
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    • pp.51-60
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    • 2010
  • This paper proposes a new scheme to obtain enhanced 3D shape information rapidly for WLPSI(White Light Phase Shifting Interferometry). WLPSI is a convenient method to measure the height of the micro products. First we propose an effective method of limiting search interval for detecting the peak of the visibility function in order to obtain 3D shpae information rapidly. Second we propose an automatic base level decision method basad on image processing and a correction algorithm using the least square approximation method to overcome the global tilt problem of the conventional WLPSI algorithms. Third we propose an adaptive filtering method to remove the distortion known as bat-wing effect which appears near the step discontinuity. Experimental results show that the proposed overall technique is fast and provides more enhanced 3D shape information compared with the conventional WLPSI algorithms.

Sensitivity Enhancement of Shadow Moiré Technique for Warpage Measurement of Electronic Packages (반도체 패키지의 굽힘변형 측정을 위한 그림자 무아레의 감도향상 기법연구)

  • Lee, Dong-Sun;Joo, Jin-Won
    • Journal of the Microelectronics and Packaging Society
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    • v.22 no.3
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    • pp.57-65
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    • 2015
  • Electronic packages consist of various materials, and as temperature changes, warpage occurs because of the difference in coefficient of thermal expansion. Shadow $moir{\acute{e}}$ is non-contact, whole field measurement technique for out-of-plane displacement. However, the technique has low sensitivity above $50{\mu}m/fringe$, it is not adequate for the warpage measurement in some circumstance. In this paper, by applying phase shifting process to the traditional shadow $moir{\acute{e}}$, measurement system having enhanced sensitivity of $12.5{\mu}m/fringe$ is constructed. Considering Talbot effect, the measurement is carried out in the half Talbot area. Shadow fringe pattern having four times enhanced sensitivity is obtained by the image process with four shadow fringes. The measurement technique is applied to the fibered package substrate and coreless package substrate for measuring warpages at room temperature and at about $100^{\circ}C$.

Optical-fiber Electronic Speckle Pattern Interferometry for Quantitative Measurement of Defects on Aluminum Liners in Composite Pressure Vessels

  • Kim, Seong Jong;Kang, Young June;Choi, Nak-Jung
    • Journal of the Optical Society of Korea
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    • v.17 no.1
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    • pp.50-56
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    • 2013
  • Optical-fiber electronic speckle pattern interferometry (ESPI) is a non-contact, non-destructive examination technique with the advantages of rapid measurement, high accuracy, and full-field measurement. The optical-fiber ESPI system used in this study was compact and portable with the advantages of easy set-up and signal acquisition. By suitably configuring the optical-fiber ESPI system, producing an image signal in a charge-coupled device camera, and periodically modulating beam phases, we obtained phase information from the speckle pattern using a four-step phase shifting algorithm. Moreover, we compared the actual defect size with that of interference fringes which appeared on a screen after calculating the pixel value according to the distance between the object and the CCD camera. Conventional methods of measuring defects are time-consuming and resource-intensive because the estimated values are relative. However, our simple method could quantitatively estimate the defect length by carrying out numerical analysis for obtaining values on the X-axis in a line profile. The results showed reliable values for average error rates and a decrease in the error rate with increasing defect length or pressure.

Performance Enhancement through Row-Column Cross Scanning in Differential Histogram-based Reversible Watermarking (차이값 히스토그램 기반 가역 워터마킹의 행열 교차 스캐닝을 통한 성능 향상 기법)

  • Yeo, Dong-Gyu;Lee, Hae-Yeoun;Kim, Byeong-Man
    • The KIPS Transactions:PartB
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    • v.18B no.1
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    • pp.1-10
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    • 2011
  • Reversible watermarking inserts watermark into digital media in such a way that visual transparency is preserved, which enables the restoration of the original media from the watermarked one without any loss of media quality. It has various applications, where high capacity and high visual quality are major requirements. This paper presents a new effective multi-round embedding scheme for the differential histogram-based reversible watermarking that satisfies high capacity requirements of the application. The proposed technique exploits the row-column cross scanning to fully utilize the locality of images when multi-round embedding phase to the message inserted image. Through experiments using multiple kinds of test images, we prove that the presented algorithm provides 100% reversibility, effectiveness of multi-round embedding, and higher visual quality, while maintaining the induced-distortion low.

View Synthesis Error Removal for Comfortable 3D Video Systems (편안한 3차원 비디오 시스템을 위한 영상 합성 오류 제거)

  • Lee, Cheon;Ho, Yo-Sung
    • Smart Media Journal
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    • v.1 no.3
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    • pp.36-42
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    • 2012
  • Recently, the smart applications, such as smart phone and smart TV, become a hot issue in IT consumer markets. In particular, the smart TV provides 3D video services, hence efficient coding methods for 3D video data are required. Three-dimensional (3D) video involves stereoscopic or multi-view images to provide depth experience through 3D display systems. Binocular cues are perceived by rendering proper viewpoint images obtained at slightly different view angles. Since the number of viewpoints of the multi-view video is limited, 3D display devices should generate arbitrary viewpoint images using available adjacent view images. In this paper, after we explain a view synthesis method briefly, we propose a new algorithm to compensate view synthesis errors around object boundaries. We describe a 3D warping technique exploiting the depth map for viewpoint shifting and a hole filling method using multi-view images. Then, we propose an algorithm to remove boundary noises that are generated due to mismatches of object edges in the color and depth images. The proposed method reduces annoying boundary noises near object edges by replacing erroneous textures with alternative textures from the other reference image. Using the proposed method, we can generate perceptually inproved images for 3D video systems.

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