• Title/Summary/Keyword: photographic information

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Digital Watermarking by Rearranging and Modifying DCT Coefficients

  • Lee, Hee sup;Oh, Sang-Heun;Lee, Keun-Young
    • Proceedings of the IEEK Conference
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    • 2000.07b
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    • pp.902-905
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    • 2000
  • Because of the rapid growth of Internet and multimedia applications, how to protect IPR (intellectual property rights) has become a critical issue. Is one of the ways to overcome the problem of the protection of IPR. Digital watermarking call be applied to multimedia data, such as digital images, digital video, and digital audio. In this paper, we propose a digital watermarking technique for digital images to authenticate an owner or an image by embedding visually recognizable patterns, such as logos, signatures, or stamps into images In BDCT (block discrete cosine transform) frequency domain. The proposed method sorts the components of an original image twice. At the same time, the method, also, rearranges the components of a watermark twice in order to be more robust, and finally embeds the watermark into the image. From the experimental results, the conjunction of three similarity measurements shows that our proposed method is robust to image cropping, image filtering, and JPEG (the Joint Photographic Experts Group) both subjectively and objectively.

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Recent Status of JPEG Pleno Holography Standardization (JPEG Pleno Holography 표준화 현황)

  • K.-J. Oh;Y. Lim;H.-G. Choo
    • Electronics and Telecommunications Trends
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    • v.38 no.2
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    • pp.66-74
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    • 2023
  • Holography is the most promising 3D imaging technology to faithfully record and reproduce light information. In addition, it is widely explored in metrology for applications such as microscopy and tomography because it can accurately measure 3D shapes. However, the data size of a digital hologram is very large, and the data characteristics are notably different from those of conventional 2D images. The Joint Photographic Experts Group (JPEG) is a group of experts from the International Organization for Standardization/International Electrotechnical Commission. This group develops and maintains standards for still image compression. In 2014, the JPEG released a new standard for 3D image compression called JPEG Pleno to represent light fields, point clouds, and holograms. Among them, JPEG Pleno Holography is the first international standard for hologram compression. We review recent advances in JPEG Pleno Holography standardization and discuss future directions of development.

New Record of Two Powderpost Beetles (Coleoptera-Bostrichidae) to Korean Fauna (한국산 개나무좀과 (딱정벌레목)의 2미기록종에 대한 보고)

  • Sangwook Park;Ki-Jeong Hong;Heung-Sik Lee;Woong Ki
    • Korean journal of applied entomology
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    • v.63 no.1
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    • pp.1-4
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    • 2024
  • Two species, Lyctoxylon dentatum (Pascoe, 1866) and Melalgus batillus (Lesne, 1902), belong to the family Bostrichidae are reported in Korea for the first time. We provide the brief diagnosis and information on the species and their photographic images.

The Study on Recording Method for Buried Cultural Property Using Photo Scanning Technique (사진스캐닝 기술에 의한 매장문화재 기록방법에 대한 연구)

  • Koo, Ja-bong
    • Journal of Digital Contents Society
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    • v.16 no.5
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    • pp.835-847
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    • 2015
  • Photo scanning can create point cloud and polygon models like 3D scanners bringing an object into the 3 dimensional world by combining several sheets of photographic information. The created data give us information about planes and sectional forms required for a 2 dimensional survey as well as 3 dimensional figures of buried cultural property. It requires a lot of time to record buried cultural property in the field, however, the photo scanning technique does not need additional equipment and manpower so the work may begin immediately while the property is protected. Moreover, it reduces financial burdens as it creates 3 dimensional data using images acquired by photography but provides the optimal condition to check 3 dimensional information quickly and easily.

Three-dimensional Crush Measurement Methodologies Using Two-dimensional Data (2차원 데이터를 활용한 3차원 충돌 변형 측정 방법)

  • Han, Inhwan;Kang, Heejin;Park, Jong-Chan;Ha, Yongmin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.23 no.3
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    • pp.254-262
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    • 2015
  • This paper presents 3D collision deformation modelling methodologies using photogrammetry for reconstruction of vehicle accidents. A vehicle's deformation shape in collision provides important information on how the vehicle collided. So effective measurement(scanning) and construction of a corresponding appropriate model are essential in the analysis of collision deformation shape for obtaining much information related to collision accident. Two measurement methods were used in this study: Indirect-photogrammetry which requires relatively small amount of photos or videos, and direct-photogrammetry which requires large amount of photos directly taken for the purpose of 3D modelling. When the indirect-photogrammetry method, which was mainly used in this study, lacked enough photographic information, already secured 2D numerical deformation data was used as a compensation. This made 3D collision deformation modelling for accident reconstruction analysis possible.

Salt and Pepper Noise Removal using Neighborhood Pixels (이웃한 픽셀을 이용한 Salt and Pepper 잡음제거)

  • Baek, Ji-Hyeoun;Kim, Chul-Ki;Kim, Nam-Ho
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2019.05a
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    • pp.217-219
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    • 2019
  • In response to the increased use of digital video device, more researches are actively made on the image processing technologies. Image processing is practically used on various applied fields such as medical photographic interpretation, and object recognition. The types of image noise include Gaussian Noise, Impulse Noise, and Salt and Pepper. Noise refers to the unnecessary information which damages the video and the noise is mainly removed by a filter. Typical noise removal methods are Median Filter and Average Filter. While Median Filter is effective for removing Salt and Pepper noise, the noise removal performance is relatively lower in the environment with high noise density. To address such issue, this study suggested an algorithm which utilizes neighboring pixels to remove noise.

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Quantitative Evaluation of Nose Deformity of Cleft Lips Using a Neural Network (신경망을 이용한 구순열로 인한 코변형의 정량적 평가)

  • Kim Soo-Chan;Nam Ki-Chang;Kim Jin-Tae;Hong Hyun-Ki;Cha Eun-Jong;Kim Deok-Won
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.43 no.3 s.309
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    • pp.78-84
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    • 2006
  • Our study aimed at quantitative assessment of a cleft palate nose deformity condition by analyzing the following parameters gathered from a photographic image of a cleft palate patient: (1) angle difference between two nostril axes, (2) center of the nostril and distance between two centers, (3) overlapped area of two nostrils, and (4) the overlapped area ratio of the two nostrils. A regression equation of doctor's grades was obtained using the eight parameters. Three plastic surgeons gave us the glades for the each photographic image by to increments with maximum grade of 100. The average reproducibility of the grades given by the three plastic surgeons and the three laymen using the developed program was $10.8{\pm}4.6%\;and\;7.4{\pm}1.8%$, respectively. Kappa values representing the degree of consensus of the plastic surgeons and the three laymen were 0.43 and 0.83, respectively. Correlation coefficient of the grades evaluated by the surgeons and obtained by the regression equation was 0.642 and that of the grades by the surgeons and by the neural network was 0.798. In conclusion, the developed neural network model provided us better reproducibility, much better consensus, and better correlation than doctor's subjective evaluation in addition to objectiveness and easy application.

The Meaning of History in the May 18th Democratic Uprising Related Photographic Portraits Focusing on the Premordial Associations ('5·18민중항쟁' 관련 초상사진과 역사적 의미 근원연상을 중심으로)

  • Kim, Kyum-Nyeo
    • Korean journal of communication and information
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    • v.71
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    • pp.75-115
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    • 2015
  • This study is to describe the meaning of associations at $5{\cdot}18$-related photographic portrait phenomenologically. Referent in the photography arouses different and unique type of associations. Moreover, it appears differently emotional experience by the associations. Therefore, the purpose of this study is to describe types of associations and emotional experience about referents gained through $5{\cdot}18$ photography and to construct the meaning. It is based on concepts of primordial associations discussing in the phenomenology but this study was described the meaning of $5{\cdot}18$ the May 18th democratic uprising focusing on types of associations and meanings derived by direct experience from photography. According to this result, the viewpoint of $5{\cdot}18$ Democracy Movement approaches from objective academic system or cannot be withdrew as dynamics of the political ideology. It is that the fundamental and impulsive emotions from each individual who participated in the movement are affected. The fundament of the May 18th democratic uprising is based on their basis of life and the will to primitive power of a love & affective community.

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Analysis of Precision According to Converging Angle in Close-Range Digital Photogrammetry (근접수치사진측량의 수렴각변화에 따른 정밀도 해석)

  • Seo, Dong-Ju;Kim, Jin-Su
    • Journal of the Korean Association of Geographic Information Studies
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    • v.8 no.4
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    • pp.123-133
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    • 2005
  • This study has made photographing respectively by changing the converging angle by use of d7 $metric^5$ that is a measurement digital camera. And also in order to minimize the errors happened at the relative orientation, we have sorted out the round target that the relative orientation is automatically on the programming and have calculated RMSE by carrying out the bundle adjustment. We think that such a study could be used as very important basic data necessary in deriving the optimal photographic conditions by the close-range digital photogrammetry and in judging such a degree.

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Economic impact of the technical security utilizing the inter-industry relations table (산업연관표를 활용한 기술보안의 경제적 효과)

  • Lim, Heon-Wook;Shim, Jae-Young
    • Journal of Convergence for Information Technology
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    • v.7 no.1
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    • pp.99-106
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    • 2017
  • Research on technology security has been limited to technology leakage prevention. Companies recognize technology security as an investment. so It is a passive situation for recruitment and equipment installation. Therefore, the amount of damage caused by the technology leakage is regarded as profit, The purpose of this study is to investigate the effect of technology security on the domestic economy by using the inter-industry relations table. The inter-industry relations table was created by Vasily Leontiyev. In 1960, the Bank of Korea made it for the first time in Korea. Korea introduced the ISMS in 2001 and conducted a study on the technology security economy. Through this study, we hope that technology security will be recognized as income, not investment.