Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan
Online ISSN : 2758-9218
Print ISSN : 0285-3957
Search
Advanced search
OR
Browse
Search
Reports of the 231st Technical Conference of the Institute of Image Electronics Engineers of Japan
Displaying 1-11 of 11 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Date: March 8-9, 2007 Location: The University of Tokushima
Thursday, March 8
13:20-14:50 Chair: Hidekazu SEKIZAWA, Toshiba Tec Document Processing Systems Co.,Ltd.
  • Fundamental study of Watermark Algorithm for Images Based on Fractal Coding
    Hiroaki NAGAI, Eiji NAKAMURA, Katsutoshi SAWADA
    Session ID: 06-06-01
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_1
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    This paper presents a new watermarking method based on fractal image coding. Fractal image coding is first carried out where fractal codes are divided into two ranges related to watermark information 1 and 0. Then fractal decoding is performed to obtain an image embedded with the watermark information. For the extraction of watermark information, the image is fractal-coded to decide the range of fractal codes. The fractal codes employed for watermarking are luminance scaling, isometric conversions, and horizontal/vertical shift of a domain-block. It has been examined how image qualities are affected by the watermarking process and to what extent watermark extraction accuracies are degraded by quantization attacks.
    View full abstract
    Download PDF (408K)
  • Hybrid Digital Watermarking Robust Against JPEG Compression and Geometric Transformation
    Fumiaki MOTOYOSHI, Manabu SHINOHARA, Osamu UCHIDA
    Session ID: 06-06-02
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_7
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    In this paper, we propose a hybrid type digital watermarking method which applied two kinds of technique. Experimental results show that the watermark embedded by the proposed method is perceptually invisible and robust against various attacks such as JPEG compression and geometric transformation.
    View full abstract
    Download PDF (422K)
  • Lossy Coding of Error Diffused Images
    Makoto KITAMURA, Fumitaka ONO
    Session ID: 06-06-03
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_13
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    Lossy coding of error diffused images is an interesting topic but has not been studied well yet. In this paper we study two different categories. First one is to use multi-level lossy image coding methods such as JPEG, JPEG-LS and JPEG2000 including the possibility of reduction and enlargement, with the error diffusion processing at the receiver. The other category is to introduce the loss by sending the number of black pixels in plural pixels, where we studied the simplest case of three levels in two pixels. In the former category, we found that JPEG2000 achieves best, and the error-diffused image at the receiver is compared with the restored bi-level image of the latter by the SNR of inverse halftoned images. The result shows that the first category works better for the low-frequency dominated images and the second one works better for the high-frequency dominated images.
    View full abstract
    Download PDF (340K)
15:00-16:00 Chair: Fumitaka ONO, Tokyo Polytechnic University
  • Development of a Fidelity Color Calibration Method Based on the Colorimetric Characterization of an Inkjet Printer
    Wanqing SONG, Haruyuki SEKI, Yoshifumi SHIMODAIRA
    Session ID: 06-06-04
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_21
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    A fidelity color calibration method was developed using the colorimetric characterization of an inkjet printer in order to realize colorimetric reproduction. To make a prediction the value of RGB to calibrate the input of printer drive, the measurement XYZ data of a printer was used to estimate RGB from XYZ by prism interpolation method. The XYZ of input color were compared with those of the values capture by the printer. The average color difference, ΔE, between the input and printed one were 1.89.
    View full abstract
    Download PDF (409K)
  • A new approach for precise and stable detection of image scaling changes
    Takamune SATO, Tomomichi KUSAJIMA, Minoru ITO
    Session ID: 06-06-05
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_27
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    This paper proposes a new approach for precisely and stably detecting changes in image scaling factor. DFT amplitudes for reference and input images are first transformed to the polar expressions. In the transformation, the cause of detection errors is analyzed and optimal frequency filtering for reducing errors is found. The position shift between the polar spectrum is detected by our PSA method. The weight function effective for accurate detection of the shift is discussed. The approach is applied for detecting changes of image scaling for four typical types of images. It becomes clear that the scaling factor can be detected with higher accuracy than that of the conventional method. The accuracy dependences on the patterns and scaling factor are also made clear and discussed.
    View full abstract
    Download PDF (651K)
16:10-17:00 Chair: Minoru ITO, Kogakuin University
Friday, March 9
9:00-10:30 Chair: Yoshinori HATORI, Tokyo Institute of Technology
  • A Study of the Appearance Rate of Persons in TV Program
    Megumi OHASHI, Masashi OYA, Makoto KOSUGI, Nobuhiko MUKAI
    Session ID: 06-06-07
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_41
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    This research aims to extract persons from TV program and to measure the appearance rate. In order to achieve person's identification without depending on the direction of the face, the face is detected using Haar-Like feature, then, the person's clothes color is acquired based on the position of the detected face. The color histogram of the clothes is registered as a dictionary, and then clothes color of the succeeding scene is compared with this dictionary. After all processing is finished, and rate of the appearance of the specified person is calculated. Finally, rate of appearance in processing is compared with actual rate of appearance, and the extraction rate shows very high.
    View full abstract
    Download PDF (1768K)
  • Generation of a 3D Scenery Map with Shadows at Arbitrary Time Using Aerial Photographs
    Masafumi EZAKI, Yusuke UCHIDA, Makoto KOSUGI, Nobuhiko MUKAI
    Session ID: 06-06-08
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_49
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    This paper shows that a method of generating a three-dimensional scenery map by removing shadows in an aerial photograph, and combining corresponding three-dimensional map, in order to realize a three-dimensional map that does not depend on the season and the time. First, the features of the sunny area and the shadow area are investigated. After that, the aerial photograph is classified into road area, roof area, and other, and the shadow extraction and the shadow correction processing are achieved for each area. Finally, an aerial photograph without shadows can be obtained by composing three areas, so that a three-dimensional map with shadows at arbitrary season and time can be generated.
    View full abstract
    Download PDF (2806K)
  • A visual simulation method for gold leaf using BRDF and height map data
    Kazunori MIYATA, Masaoki MITSUTAKE, Toshihiro TOMOI, Hiroshi TASHIMO, ...
    Session ID: 06-06-09
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_55
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    Southern Ishikawa area research unit, which has been selected as one of the promotion of science and technology on city area project, is developing a visual simulation method for traditional craft materials. This paper reports a method for representing gold leaves faithfully using Bidirectional Reflectance Distribution Function (BRDF) and surface bump data of materials. In this method, the color variation to gold leaf by the angle of incidence of light is confirmed and it can be perfectly reproduced. In addition, a peculiar wrinkle to gold leaf is also expressed.
    View full abstract
    Download PDF (3272K)
10:40-11:40 Chair: Tetsuro KUGE, NHK Science and Technical Research Laboratories
  • Generating The Center-View Image from A Circular Array of Real Captured Images
    Akira KUBOTA, Ai SAKUMA, Kazuya KODAMA, Yoshinori HATORI
    Session ID: 06-06-10
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_61
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    This technical report provides experimental results of center-view image generation from a circular array of real captured images. In this experiment, our previously proposed method was applied using estimated camera calibration parameters. The experimental results show that artifacts due to camera calibration error and noise were not visibly observed; hence our method effectively works for real images.
    View full abstract
    Download PDF (1458K)
  • Image Retrieval System of Flowers
    - Improvement of Flower Region Extraction and User Interface -
    Yuji UEDA, Kei IWASAKI, Saeko TAKAGI, Fujiichi YOSHIMOTO
    Session ID: 06-06-11
    Published: 2007
    Released on J-STAGE: December 18, 2007
    DOIhttps://doi.org/10.11371/wiieej.06-06.0_65
    CONFERENCE PROCEEDINGS RESTRICTED ACCESS
    Show abstractHide abstract
    In this paper, we improved Image Retrieval System of Flowers that can be easily used in a mobile environment.On the limited specification of the mobile phone, we improved the technique to extract a flower region from a source flower image and improved the user interface. In extracting a flower region, we solved the failure of painting out processing, miss-extraction of rear flowers, and incompleteness of color specification method. In the user interface, we proposed a new color specification method and a way to confirm the result of the extracted region of a flower. By experimenting on the flower region extraction using our method, the result shows that the rate of the succeeded extractions was 97.1% and increased 21.3 points compared with the previous system.
    View full abstract
    Download PDF (824K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top