Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan
Online ISSN : 2758-9218
Print ISSN : 0285-3957
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Reports of the 223rd Technical Conference of the Institute of Image Electronics Engineers of Japan
Displaying 1-10 of 10 articles from this issue
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Date: February 24, 2006 Location: Kikai-Shinko-Kaikan Bldg.
10:30-12:00 Chair:Hidefumi OSAWA, Canon Inc.
  • Lossless Coding of Error Diffused Images by Inverse Halftoning with Viterbi Decoding
    Makoto KITAMURA, Fumitaka ONO
    Session ID: 05-06-01
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_1
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
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    A lossless coding of an error-diffused image by coding a multi-level image generated through inverse halftoning process using soft decision method is proposed and studied. In order to study a coding method of error-diffused image in the domain of multi-level, it is necessary to find the image having minimum entropy, so far as it can produce exactly same error-diffused image at the receiver. To find such a multi-level image, we applied the idea of Viterbi decoding in inverse error diffusion process. The result shows that the multi-level image derived by proposed method has about 10-19% less entropy than the bi-level halftone image and 27-49% less entropy than that of the original multi-level image, which means that the multi-level image coding could be a good method for coding error-diffused image.
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  • Study on an Improvement of Attack Tolerance about Digital Watermarking Method Using Wavelet Transform
    Masahiro TSUJI, Jun WATANABE, Madoka HASEGAWA, Shigeo KATO
    Session ID: 05-06-02
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_5
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
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    Recently, an infringement of copyright by illegal copy of digital contents becomes a problem. Digital watermark technology is a solution of this problem. Watermarking Methods are classified into two types. One is a reversible watermarking method which can restore to the original image from a watermarked one, and another is an irreversible watermarking method. However, an irreversible watermarking method cannot be utilized to some sort of application system such as a medical imaging system. Therefore, we propose a reversible watermarking method. In the proposed method, two wavelet coefficients in several bands are treated as a vector, and one bit of a watermark is embedded into the vector. The reversible restoration can be performed by keeping one-to-one relationship between the original vector and the converted one. Simulation results show that the proposed method has better performance than the prior study using wavelet coefficients.
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  • Study on a Data Compression of Dither Images Using a Concept of Schalkwijk Code
    Hisashi OWADA, Madoka HASEGAWA, Shigeo KATO
    Session ID: 05-06-03
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_9
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    Dither methods are generally used for representing multi-level images to a bi-level display, and various techniques of dither methods have been proposed. Especially, the minimized average error method is known as one of the excellent methods in the image quality. However, in this method, it is difficult to get a high compression performance. In the preceding studies, we proposed a data compression method of minimized average error images using the Schalkwijk code. First of all, the dithered image is divided into some blocks in this method. Secondly, the Shaclkwijk code is applied to each divided block. In the preceding work, we used only 4*4 pixel size for dividing into the blocks. In this paper, we consider the various block sizes such as 3*1, 2*2, and 3*3. In this paper, we consider various block sizes to divide the image, and we report simulation results of compression ratio.
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13:00-15:00 Chair: Hideyuki NAKAO, Toshiba Corp.
  • Study of the Usability of e-books for the Aged and Young Reader
    Yusuke TAKIGUCHI, Haruo ISONO, Chihiko YAMADA
    Session ID: 05-06-04
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_13
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    We conducted a protocol analysis experiment to examine the usability of electronic books for the aged. Elderly people and college students took part in the experiment. The experiment revealed similarities and differences between the aged and young readers when reading e-books. For the elderly, the ability to change the size of printed words of e-books is particularly useful. We conclude that e-books are not necessarily easy to use for either the elderly or young readers, and that greater efforts are needed to improve their user-friendliness.
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  • Simple Process of Manufacturing of Electrophoretic Display Device
    Takayuki SANO, Yasushi HOSHINO
    Session ID: 05-06-05
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_17
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
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    To develop electrophoretic display more, manufacturing technologies are important. Up to now, the technique named Encapsulation and Roll-to-Roll Manufacturing processes has been introduced. It is considered that the technique is carried out from the view point of simplification of manufacturing method. In this report, an attempt to realize very simplified manufacturing technique is introduced.
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  • Preparation of Microencapsulated Electrophoretic Ink and Display Characteristics
    Junichiro OZAKI, Tsutomu SHIMANO, Sakiko NAKAMURA, Takashi KITAMURA
    Session ID: 05-06-06
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_21
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    An electrophoretic display (EPID) based on the movement of particles in an insulating liquid is well known to be one of the technology utilized for the electric paper and has been actively investigated in the past few years. Emulsification and micro-encapsulation of dispersion containing with white and black particles dispersed in an insulating liquid is reported in this paper. The gelatin and melamine resin was used for surfactant and wall material of micro-capsule, respectively. The optimization of the preparation condition of the micro-encapsulation was done. The EPID using the micro-encapsulated electrophoretic ink displays black and white solid image in the response to an external voltage.
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  • «Invited Lecture» Technical Trends of E Ink Electronic Paper Technology
    - Recent Developments and Commercialization -
    Hidetoshi DANJO
    Session ID: 05-06-07
    Published: February 24, 2006
    Released on J-STAGE: November 07, 2006
    DOIhttps://doi.org/10.11371/wiieej.05-06.0_25
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    We provide an overview of the technical trends in E Ink Electronic Paper Technology through recent and development and commercialization activities. The initial product launched in Japan in 2004 was for Electronic Publishing applications, but since then, large-format public signage, watch/clock applications and other novel applications have appeared and Electronic Publishing applications are spreading to Chinese, European and U.S. markets. On the technology side, advances in response time and the development of Color E Ink displays make it a prime candidate for the reflective display of choice in the era of ubiquitous computing.
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15:10-16:50 Chair:Jun SOMEYA, Mitsubishi Electric Corp.
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