• Title/Summary/Keyword: Image System

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Hardware Software Co-Simulation of the Multiple Image Encryption Technique Using the Xilinx System Generator

  • Panduranga, H.T.;Naveen, Kumar S.K.;Sharath, Kumar H.S.
    • Journal of Information Processing Systems
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    • v.9 no.3
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    • pp.499-510
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    • 2013
  • Hardware-Software co-simulation of a multiple image encryption technique shall be described in this paper. Our proposed multiple image encryption technique is based on the Latin Square Image Cipher (LSIC). First, a carrier image that is based on the Latin Square is generated by using 256-bits of length key. The XOR operation is applied between an input image and the Latin Square Image to generate an encrypted image. Then, the XOR operation is applied between the encrypted image and the second input image to encrypt the second image. This process is continues until the nth input image is encrypted. We achieved hardware co-simulation of the proposed multiple image encryption technique by using the Xilinx System Generator (XSG). This encryption technique is modeled using Simulink and XSG Block set and synthesized onto Virtex 2 pro FPGA device. We validated our proposed technique by using the hardware software co-simulation method.

Semantic Image Annotation and Retrieval in Mobile Environments (모바일 환경에서 의미 기반 이미지 어노테이션 및 검색)

  • No, Hyun-Deok;Seo, Kwang-won;Im, Dong-Hyuk
    • Journal of Korea Multimedia Society
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    • v.19 no.8
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    • pp.1498-1504
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    • 2016
  • The progress of mobile computing technology is bringing a large amount of multimedia contents such as image. Thus, we need an image retrieval system which searches semantically relevant image. In this paper, we propose a semantic image annotation and retrieval in mobile environments. Previous mobile-based annotation approaches cannot fully express the semantics of image due to the limitation of current form (i.e., keyword tagging). Our approach allows mobile devices to annotate the image automatically using the context-aware information such as temporal and spatial data. In addition, since we annotate the image using RDF(Resource Description Framework) model, we are able to query SPARQL for semantic image retrieval. Our system implemented in android environment shows that it can more fully represent the semantics of image and retrieve the images semantically comparing with other image annotation systems.

Design of Searchable Image Encryption System of Streaming Media based on Cloud Computing (클라우드 컴퓨팅 기반 스트리밍 미디어의 검색 가능 이미지 암호 시스템의 설계)

  • Cha, Byung-Rae;Kim, Dae-Kyu;Kim, Nam-Ho;Choi, Se-Ill;Kim, Jong-Won
    • The Journal of the Korea institute of electronic communication sciences
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    • v.7 no.4
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    • pp.811-819
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    • 2012
  • In this paper, we design searchable image encryption system to provide the privacy and authentication on streaming media based on cloud computing. The searchable encryption system is the matrix of searchable image encryption system by extending the streaming search from text search, the search of the streaming service is available, and supports personal privacy and authentication using encryption/decryption and CBIR technique. In simple simulation of post-cut and image keyword creation, we can verify the possibilities of the searchable image encryption system based on streaming service.

THE ADVANTAGE OF ON ORBIT NON-UNIFORMITY CORRECTION FOR MULTI SPECTRAL CAMERA (MSC)

  • Chang Young-Jun;Kong Jong-Pil;Huh Haeng-Pal;Kim Young-Sun;Park Jong-Euk
    • Proceedings of the KSRS Conference
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    • 2005.10a
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    • pp.586-588
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    • 2005
  • The MSC (Multi Spectral Camera) system is a remote sensing payload to obtain high resolution ground image. This system uses lossy image compression method for &Direct mission& that transmit whole image during one contact. But some image degradation occurred especially at high compression ratio. To reduce this degradation, the MSC uses NUC (Non-uniformity Correction) Unit. This unit correct CCD (Charge Coupled Device)'s high-frequency non-uniformity. So high frequency contents of image can be minimized and whole system SNR can be maximized. But NUC has some disadvantage either. It decreases entire system reliability by adding one electronic system. Adding NUC also led to difficulty of electronic design, assembly and testability. In this paper, the comparison is performed between on-orbit non-uniform correction and on ground correction. by evaluating NUC advantage for the point of view of image quality. Using real MSC parameter and proper model, considerable reference point for the system design came to possible.

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An Effective Medical Image System using TFT-DXD Method's Digital X-ray Detector (TFT-DXD 방식의 디지털 X-ray Detector를 이용한 고효율 의료 영상처리시스템)

  • Hwang, Jae-Suk;Lee, Jae-Kyun;Lee, Chae-Wook
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.4C
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    • pp.389-395
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    • 2007
  • The Film X-ray and the CCD method of current medical image system have the disadvantages such as required large place and diagnosis time. In this paper, we implement an effective medical image system using TXT-DXD method's digital X-ray detector(DR1000C). The implemented medical image system has advantages of placing efficiency and short diagnosis time. In order to make the image out of the system more effective, we develop an LCD(Liquid Crystal Display) control driver, having the resolution of 1900*1200. And we propose an enhancement unsharp masking method to update image enhancement of DR1000C medical image system, and compare it with the current methods.

Image Quality Evaluation according to X-ray Source Arrangement Type and the Number of Projections in a s-IGDT System (s-IGDT 시스템의 X-선원 배열 형태 및 투영상 개수에 따른 영상 화질 평가에 관한 연구)

  • Lee, Dahye;Nam, KiBok;Lee, Seungwan
    • Journal of radiological science and technology
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    • v.45 no.2
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    • pp.117-125
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    • 2022
  • Although stationary inverse-geometry digital tomosynthesis (s-IGDT) is able to reduce motion artifacts, image acquisition time and radiation dose, the image quality of the s-IGDT is degraded due to the truncations arisen in projections. Therefore, the effects of geometric and image acquisition conditions in the s-IGDT should be analyzed for improving the image quality and clinical applicability of the s-IGDT system. In this study, the s-IGDT images were obtained with the various X-ray source arrangement types and the various number of projections. The resolution and noise characteristics of the obtained s-IGDT images were evaluated, and the characteristics were compared with those of the conventional DT images. The s-IGDT system using linear X-ray source arrangement and 40 projections maximized the image characteristics of resolution and noise, and the corresponding system was superior to the conventional DT system in terms of image resolution. In conclusion, we expect that the s-IGDT system can be used for providing medical images in diagnosis.

A Study on the Development of PC-card for Information Transmission of Medical Image in the Environment of ISDN(Intergrated Service Digital Network) (종합정보통신망 환경속에서 의료 영상정보 전달을 위한 PC-card 개발에 관한 연구)

  • 이동화;임춘성
    • Journal of Biomedical Engineering Research
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    • v.12 no.4
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    • pp.243-248
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    • 1991
  • This paper described the implementation of high speed transmission fort medical image between hospitals using ISDN. The implemented system, called PC-card, can transmit datas as 144Kbps and can install in the personal computer. So, this enables to get more reliable medical image with less cost, and to service the better quality for an unurbanized area. In this system, installing in the PC system were enhanced to input from medical image system and output to the memory or display

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DATA ACQUISITION SYSTEM OF THE SOFT

  • Moon, Yong-Jae;Park, Young-Deuk;Jang, Be-Ho;Sim, Kyung-Jin;Yun, Hong-Sik;Kim, Jung-Hoon
    • Publications of The Korean Astronomical Society
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    • v.11 no.1
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    • pp.243-250
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    • 1996
  • Data acquisition system mounted on the Solar Flare Telescope at Bohyunsan Optical Astronomy Observatory is briefly described. The system is made up with CCD cameras, an image processor, a PCI-type PC and a SUN workstation. The image processor, MVC 150/40 comprises a variable scan acquisition module, an image manager and a binary correlator computational module. A typical polarization image of a sunspot is presented to demonstrate performance of the system.

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Measurement System of Pentagraph Slider with Image Processing (이미지 처리기술을 이용한 펜터그라프 섭판 측정장치 개발)

  • 김기택;임기택;김봉택
    • Proceedings of the KSR Conference
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    • 1998.11a
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    • pp.296-301
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    • 1998
  • Pentagraphs are used to supply electric power to train via trolley lines. The higher train speed is, the higher voltage and current levels 8u. Since electric power is supplied with slinding contact, localized abrasion is inevitable. It is difficult and dangerous to measure their shape manually. Measurement system of pentagraph slider with ultrasonic processing has been reported. In this paper, measurement system with image processing is proposed. The system consists of CCD cameras, image grabber board, and PC operated on Windows'95. Image processing algorithms are presented and some results are illustrated.

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The Core Essence of the INR System Technology in the Geostationary Remote Sensing Satellites (정지궤도관측위성 INR 시스템 기술의 요체)

  • Kim, Handol
    • Journal of Satellite, Information and Communications
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    • v.11 no.4
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    • pp.89-93
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    • 2016
  • In this paper, we provide a summary on the core essence of INR (Image Navigation and Registration) System technology which is an essential function of geostationary remote sensing satellites. Its origin and evolution history is reviewed, its core elements and governing concept for each element are described, and a generic INR architecture is suggested which can cover all seemingly conceivable INR systems of the past, the current and the future. By this, we intend to identify and illuminate the core technical contents and the key aspects in the foreseen prospect of the up-coming INR systems and the related technologies.