• Title/Summary/Keyword: JPEG 2000

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Performance Evaluation of Parameters for applying an Adequate ROI coding method in JPEG2000 Applications (JPEG2000 음용에서 적절한 ROI 코딩 방법을 적용하기 위한 매개변수의 성능 평가)

  • Kang Ki-Jun;Lee Bu-Kwon;Seo Yeong-Geon
    • The KIPS Transactions:PartB
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    • v.13B no.3 s.106
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    • pp.301-308
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    • 2006
  • Currently, the preferred processing of a user-centered ROI(Region-of-Interest) or a specific region of image than the transmission and decompression of a full image is needed in different applications. This preferred processing has been actively studied about from the ROI coding methods in JPEG2000 standards to the new methods complementing them. But, there does not exist an ROI coding method suitable for all applications. Therefore, this study shows a criterion of selection according to the application requirements for applying an adequate ROI coding method in JPEG2000 applications, and shows the experimental results deciding efficient parameters in the selected methods.

A Co-design Method for JPEG2000 Video Compression System in Telemetry using DSP and FPGA (DSP와 FPGA의 Co-design을 이용한 원격측정용 임베디드 JPEG2000 시스템구현)

  • Yu, Jae-Taeg;Hyun, Myung-Han;Nam, Ju-Hun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.9
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    • pp.896-903
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    • 2011
  • In this paper, a co-design method for JPEG2000 video compression system using DSP and FPGA is presented. By profiling the complexity of JPEG2000 algorithm, it is noticed that a MQ-coder is the most complex part. Thus, we implement the MQ-coder on FPGA for the parallel processing using VHDL to reduce the complexity. In order to verify the performance of the MQ-coder, JBIG2 standard test vector and images are used. The experimental results show that the proposed MQ-coder enhances the processing time approximately 3 times compared with the previous software MQ-coder.

Visually Lossless Image Compression for Digital Cinema Distribution Based on DCI Specification (DCI 규격을 만족하는 디지털시네마 배급을 위한 시각적 무손실 압축 연구)

  • Kim, Chul-Hyun;Paik, Joon-Ki
    • Journal of Broadcast Engineering
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    • v.13 no.1
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    • pp.99-108
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    • 2008
  • This raper analyzes the effect of visually lossless image compression for efficient distribution of digital cinema. Currently, distribution of digital cinema is carried out based on JPEG 2000 standard that has been selected by DCI. We first summarize characteristics of JPEG 2000, and then define the concept of visually lossless coding that plays an important role in digital cinema distribution. We provide a test for JPEG 2000 compression performance according to DCI specification for visually lossless. Based on the experiment, the result satisfies high quality for cinema distribution.

An Effective Digital Watermarking Scheme in JPEG2000 (JPEG2000에서의 효율적인 디지털 워터마킹 기법)

  • 배기혁;정성환
    • Proceedings of the Korea Multimedia Society Conference
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    • 2002.05d
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    • pp.873-876
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    • 2002
  • 본 논문에서는 JPEG2000 코딩에서의 핵심 처리기술 중의 하나인 웨이블릿(wavelet) 변환 처리 후, 각 계수간의 시각특성을 이용한 JPEG2000에서의 효율적인 워터마킹 기법을 제안한다. 제안한 방법은 웨이블릿 변환 영역에서 계수간의 시각적인 특성을 이용하여 영상의 손실을 최소화하고, 저주파성분과 고주파성분에 고르게 워터마크를 삽입함으로써 보다 강인성을 높였다. 그리고 추출시에 원영상 없이도 워터마크를 추출할 수 있는 블라인더(Blind) 워터마킹 기법이다.

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Comparative Transmission of JPEG2000 and MPEG-4 Patient Images using the Error Resilient Tools over CDMA 1xEVDO Network (CDMA 1xEVDO 망에서 무선 에러에 강인한 JPEG2000과 MPEG4의 환자 영상 전송에 관한 비교연구)

  • Cho, Jin-Ho;Lee, Tong-Heon;Yoo, Sun-Kook
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.55 no.6
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    • pp.296-301
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    • 2006
  • Even though the emergency telecommunication make possible that specialist offers medical care over emergency cases in moving vehicle, we still have many problems in transmitting the image or video of patient over several wireless networks. To alleviate the effect of channel errors on compressed video bit-stream, this paper analyzed the error resilient features of JPEG2000 standard and measured the quality of transmission over noisy wireless channel, CDMA2000 1xEV-DO networks, compared to the features of error resilient tool of MPEG-4. We also proposed the optimum solution of transmitting images over real 3G network using JPEG2000 error resilient tool.

The Quality Assessment of H.264 Intra Coding and JPEG2000 (H.264 인트라 부호화와 JPEG2000의 화질 평가)

  • Cho, Sang-Gyu;Han, Hak-Su;Hwang, Jae-Jeong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.639-642
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    • 2005
  • In this paper, we assessed the subjective and objective quality of the images on low bit-rate which used the H.264 intra coding and JPEG2000. The result of our experiments shown the subjective and objective quality assessment of the intra coded image of H.264 high profile is better than JPEG2000. But, the blocking artifact is obvious because of the big difference of DCT and wavelet transform and quantization. it will be necessary to propose a new transform algorithm for the optimal quality.

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Multi-mode Embedded Compression Algorithm and Architecture for Code-block Memory Size and Bandwidth Reduction in JPEG2000 System (JPEG2000 시스템의 코드블록 메모리 크기 및 대역폭 감소를 위한 Multi-mode Embedded Compression 알고리즘 및 구조)

  • Son, Chang-Hoon;Park, Seong-Mo;Kim, Young-Min
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.46 no.8
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    • pp.41-52
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    • 2009
  • In Motion JPEG2000 encoding, huge bandwidth requirement of data memory access is the bottleneck in required system performance. For the alleviation of this bandwidth requirement, a new embedded compression(EC) algorithm with a little bit of image quality drop is devised. For both random accessibility and low latency, very simple and efficient entropy coding algorithm is proposed. We achieved significant memory bandwidth reductions (about 53${\sim}$81%) and reduced code-block memory to about half size through proposed multi-mode algorithms, without requiring any modification in JPEG2000 standard algorithm.

A Generation of ROI Mask and An Automatic Extraction of ROI Using Edge Distribution of JPEG2000 Image (JPEG2000 이미지의 에지 분포를 이용한 ROI 마스크 생성과 자동 관심영역 추출)

  • Seo, Yeong Geon;Kim, Hee Min;Kim, Sang Bok
    • Journal of Digital Contents Society
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    • v.16 no.4
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    • pp.583-593
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    • 2015
  • Today, caused by the growth of computer and communication technology, multimedia, especially image data are being used in different application divisions. JPEG2000 that is widely used these days provides a Region-of-Interest(ROI) technique. The extraction of ROI has to be rapidly executed and automatically extracted in a huge amount of image because of being seen preferentially to the users. For this purpose, this paper proposes a method about preferential processing and automatic extraction of ROI using the distribution of edge in the code block of JPEG2000. The steps are the extracting edges, automatical extracting of a practical ROI, grouping the ROI using the ROI blocks, generating the mask blocks and then quantization, ROI coding which is the preferential processing, and EBCOT. In this paper, to show usefulness of the method, we experiment its performance using other methods, and executes the quality evaluation with PSNR between the images not coding an ROI and coding it.

Fast Computation of DWT and JPEG2000 using GPU (GPU를 이용한 DWT 및 JPEG2000의 고속 연산)

  • Lee, Man-Hee;Park, In-Kyu;Won, Seok-Jin;Cho, Sung-Dae
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.44 no.6
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    • pp.9-15
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    • 2007
  • In this paper, we propose an efficient method for Processing DWT (Discrete Wavelet Transform) on GPU (Graphics Processing Unit). Since the DWT and EBCOT (embedded block coding with optimized truncation) are the most complicated submodules in JPEG2000, we design a high-performance processing framework for performing DWT using the fragment shader of GPU based on the render-to-texture (RTT) architecture. Experimental results show that the performance increases significantly, in which DWT running on modern GPU is more than 10 times faster than on modern CPU. Furthermore, by replacing the DWT part of Jasper which is the JPEG2000 reference software, the overall processing is 2$\sim$16 times faster than the original JasPer. The GPU-driven render-to-texture architecture proposed in this paper can be used in the general image and computer vision processing for high-speed processing.

An Implementation of efficient Image Compression JPEG2000 Based on DSPs (DSP를 이용한 JPEG2000 의 고효율 이미지 압축 구현)

  • 김흥선;조준기;황민철;남주훈;고성제
    • Proceedings of the IEEK Conference
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    • 2003.07e
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    • pp.2363-2366
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    • 2003
  • With the increasing use of multimedia technologies, image compression requires higher performance as well as new features such as embedded Tossy to lossless coding, various progressive order, error resilience and region-of-interest coding. In the specific area of still image encoding, a new standard, the JPEG2000, has been currently developed. This paper presents a new compression scheme based on JPEG2000. In the proposed scheme, gray coding is applied to the wavelet coefficient. Since gray coding produces an image whose bit plane is will clustered. The proposed method improves compression efficiency of the JPEG2000.

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