Search Results:　 1-20 of 154

  • 1

    An 8×8/4×4 Adaptive Hadamard Transform Based FME VLSI Architecture for 4K×2K H.264/AVC Encoder

    FAN Yibo , LIU Jialiang , ZHANG Dexue , ZENG Xiaoyang , CHEN Xinhua

    IEICE transactions on electronics 95(4), 447-455, 2012-04-01

    References (16)

  • 2

    Some Saturation Characteristics of XOR Sum of Balance Functions

    IGARASHI Yasutaka , KANEKO Toshinobu

    … In their attack scenario, we show that the mod-2 distribution is a code word of Extended Hamming code, and then proof is given by using the property of Hadamard transform. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 95(1), 2-7, 2012-01-01

    J-STAGE CrossRef References (7)

  • 3

    Invariant Manifolds Around Soliton Manifolds for the Nonlinear Klein–Gordon Equation

    Nakanishi K. , Schlag W.

    … The construction is based on the graph transform (or Hadamard) approach, which requires less spectral information on the linearized operator, and less decay of the nonlinearity, than the Lyapunov–Perron method employed previously in this context. … The main novelty of this paper is that the graph transform method is carried out in the presence of modulation parameters corresponding to the symmetries. …

    SIAM Journal on Mathematical Analysis 44(2), 1175-1210, 2012-00-00

    IR CrossRef

  • 4

    An 8×8/4×4 Adaptive Hadamard Transform Based FME VLSI Architecture for 4K×2K H.264/AVC Encoder

    FAN Yibo , LIU Jialiang , ZHANG Dexue , ZENG Xiaoyang , CHEN Xinhua

    … One of the features included in FRExt is the Adaptive Block-size Transform (ABT). … In order to conform to the FRExt, a Fractional Motion Estimation (FME) architecture is proposed to support the 8×8/4×4 adaptive Hadamard Transform (8×8/4×4 AHT). … Furthermore, this architecture also exploits the linear feature of Hadamard Transform to generate the quarter-pel SATD. …

    IEICE Transactions on Electronics E95.C(4), 447-455, 2012

    J-STAGE CrossRef

  • 5

    Evolutionary Structure Optimization of Hierarchical Neural Network for Image Recognition  [in Japanese]

    Suzuki Satoru , Mitsukura Yasue

    … Firstly, walsh-hadamard transform is applied to images for feature extraction. …

    IEEJ Transactions on Electronics, Information and Systems 131(5), 983-989, 2011

    J-STAGE CrossRef

  • 6

    On Binary Sequence Pairs with Two-Level Periodic Autocorrelation Function

    LIU Kai , XU Chengqian

    … The discrete Fourier transform spectrum property of BSPT reveals a necessary condition of BSPT. … By interleaving perfect binary sequence pairs and Hadamard matrix, a new family of binary sequence pairs with zero correlation zone used in quasi-synchronous code multiple division address is constructed, which is close to the upper theoretical bound with sequence length increasing. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 93(11), 2278-2285, 2010-11-01

    J-STAGE CrossRef References (18) Cited by (1)

  • 7

    Integer Discrete Cosine Transform via Lossless Walsh-Hadamard Transform with Structural Regularity for Low-Bit-Word-Length

    SUZUKI Taizo , IKEHARA Masaaki

    … This paper presents an integer discrete cosine transform (IntDCT) with only dyadic values such as k/2n (k, $n\in\mathbb{N}$). … First, the proposed M-channel lossless Walsh-Hadamard transform (LWHT) can be constructed by only (log2M)-bit-word-length and has structural regularity. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 93(4), 734-741, 2010-04-01

    J-STAGE CrossRef References (17)

  • 8

    A Study on Illumination Condition for Optical-digital Water Marking  [in Japanese]

    KOMORI Mizuho , UEHIRA Kazutake , SUZUKI Masahiro

    筆者らは,美術館の絵画など非電子画像の著作権・肖像権を無断撮影からの保護を目的に透かし情報を光を用いて埋め込む電子透かし技術の研究を行っている.この技術では,観察者に気付かれないように光に透かし情報を含ませることがポイントになる.今回,被写体上に照射された透かし情報を含む光について透かしパターンが知覚されない条件を検証した.実験結果から,不可視性はパターンのコントラストに依存するが,本技術を応用す …

    ITE Technical Report 33(45), 11-14, 2009-10-29

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  • 9

    A Study on Illumination Condition for Optical-digital Water Marking  [in Japanese]

    KOMORI Mizuho , UEHIRA Kazutake , SUZUKI Masahiro

    筆者らは,美術館の絵画など非電子画像の著作権・肖像権を無断撮影からの保護を目的に透かし情報を光を用いて埋め込む電子透かし技術の研究を行っている.この技術では,観察者に気付かれないように光に透かし情報を含ませることがポイントになる.今回,被写体上に照射された透かし情報を含む光について透かしパターンが知覚されない条件を検証した.実験結果から,不可視性はパターンのコントラストに依存するが,本技術を応用す …

    Technical report of IEICE. HIP 109(261), 11-14, 2009-10-22

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  • 10

    Improvement of image processing speed of the 2D Fast Complex Hadamard Transform(International Workshop on Advanced Image Technology 2009)

    Fujita Yasuhito , Tanaka Ken-ichi

    … As for Hadamard Transform, because the calculation time of this transform is slower than Discrete Cosine Transform(DCT) and Fast Fourier Transform(FFT), the effectiveness and the practicality are insufficient. …

    IEICE technical report. Image engineering 108(373), 161-166, 2009-01-05

    CiNii Fulltext PDF - Subscription  References (5)

  • 11

    Improvement of reconstructed image from computer generated psuedo holograms using iterative method(International Workshop on Advanced Image Technology 2009)

    Sakanaka Kouta , Tanaka Kenichi

    … Computer-Generated Hologram(CGH) is generally made by Fourier Transform. … Computer-Generated Pseudo Hologram(CGPH) is made up Complex Hadamard Transform instead of CGH which is made by the Fourier Transform. … In this paper, a binary image was converted in Complex Hadamard Transform, and CGPH was made. …

    IEICE technical report. Image engineering 108(373), 177-181, 2009-01-05

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  • 12

    Embedding Confidential imformation by computer-generated pseudo hologram with complex hadamard Transform  [in Japanese]

    TANAKA Ken-ichi , FUJITA Yasuhito

    計算機ホログラムの合成に用いるフーリエ変換の代わりに複素アダマール変換を利用した擬似計算機ホログラムを合成した.その結果,物理的な像再生はできないものの,シミュレーションによる像再生をすることができ,2値位相量子化についてもフーリエ変換と同じような結果を得ることができた.また,擬似計算機ホログラムの応用として,ディザ画像への秘密情報の埋め込みに応用した.その結果,StirMark攻撃に脆弱であるこ …

    ITE Technical Report 32(54), 71-75, 2008-11-28

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  • 13

    Embedding Confidential imformation by computer-generated pseudo hologram with complex hadamard Transform  [in Japanese]

    TANAKA Ken-ichi , FUJITA Yasuhito

    計算機ホログラムの合成に用いるフーリエ変換の代わりに複素アダマール変換を利用した擬似計算機ホログラムを合成した.その結果,物理的な像再生はできないものの,シミュレーションによる像再生をすることができ,2値位相量子化についてもフーリエ変換と同じような結果を得ることができた.また,擬似計算機ホログラムの応用として,ディザ画像への秘密情報の埋め込みに応用した.その結果,StirMark攻撃に脆弱であるこ …

    IEICE technical report. Image engineering 108(324), 71-75, 2008-11-21

    CiNii Fulltext PDF - Subscription  References (14)

  • 14

    Computer-generated Pseudo Holograms Using Complex Hadamard Transform and Application of Embedding into Dithered Images(<Special Issue>Image Processing/Coding and Applications)  [in Japanese]

    Tanaka Ken-ichi , Fujita Yasuhito , Isoi Ryota

    … A computer-generated pseudo hologram was synthesized using the complex Hadamard transform instead of the Fourier transform used to synthesize a computer-generated hologram. … As a result, an image was reconsurcted through ae simulation, and a result that was similar result that from to the Fourier transform was obtained for the binary phase quantization, although a physical image (optical reconstructed image) was obtained. …

    The journal of the Institute of Image Information and Television Engineers 62(11), 1746-1761, 2008-11-01

    CiNii Fulltext PDF - Open Access  J-STAGE CrossRef References (17) Cited by (2)

  • 15

    The use of Hadamard Matrix as a Secret Key in Digital Image Watermarking  [in Japanese]

    HAMANO Keita , NAKAMOTO Masayoshi , HINAMOTO Takao

    電子透かしは,対象のディジタルコンテンツに透かしデータを埋め込むことによって著作権を保護する手法である.本研究では,相関値を利用した画像電子透かし法に対し,アダマール変換された領域に透かし情報を埋め込む手法を提案する.一般に,変換核で用いられるアダマール行列は無数に存在するので,これを鍵系列として保持することにより,コンテンツ所有者の証とすることができる.また,焼きなまし法(SA)を用いることによ …

    IEICE technical report. Signal processing 108(164), 67-72, 2008-07-18

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  • 16

    The use of Hadamard Matrix as a Secret Key in Digital Image Watermarking  [in Japanese]

    HAMANO Keita , NAKAMOTO Masayoshi , HINAMOTO Takao

    電子透かしは,対象のディジタルコンテンツに透かしデータを埋め込むことによって著作権を保護する手法である.本研究では,相関値を利用した画像電子透かし法に対し,アダマール変換された領域に透かし情報を埋め込む手法を提案する.一般に,変換核で用いられるアダマール行列は無数に存在するので,これを鍵系列として保持することにより,コンテンツ所有者の証とすることができる.また,焼きなまし法(SA)を用いることによ …

    IEICE technical report. WBS, Wideband System 108(166), 67-72, 2008-07-18

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  • 17

    Fast Decoding of the p-Ary First-Order Reed-Muller Codes Based on Jacket Transform

    LEE Moon Ho , BORISSOV Yuri L.

    … This algorithm is an extension in the complex domain of the fast Hadamard transform decoding algorithm applicable to the binary case. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 91(3), 901-904, 2008-03-01

    J-STAGE CrossRef References (12)

  • 18

    COMPUTER-GENERATED PSEUDO HOLOGRAM WITH COMPLEX HADAMARD TRANSFORM AND IMPROVEMENT OF IMAGE RECONSTRUCTION(INTERNATIONAL Workshop on Advanced Image Technology 2008)

    Tanaka Ken-ichi , Fujita Yasuhito

    … In this paper, we propose the Hadamard transform as a means of the image encoding. … Hadamard transform is conversion of which the base function requested by Hadamard matrix composed of the regular matrix only of ±1, and the conversion type can show the base function by the sum total of the product of Hadamard matrix. …

    IEICE technical report. Image engineering 107(411), 181-185, 2007-12-31

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  • 19

    A DIGITAL WATERMARKING OF PSEUDO HOLOGRAM USING COMPLEX HADAMARD TRANSFORM(INTERNATIONAL Workshop on Advanced Image Technology 2008)

    Tanaka Ken-ichi , Isoi Ryouta

    … Complex Hadamard transform is used for making a pseudo hologram embedded in the digital watermarking. … The Complex Hadamard transform used in this paper is same orthogonal transform as the Discrete Fourier Transform (DFT). … The feature of Hadamard transform consists of Hadamard matrix that is based on ±1. …

    IEICE technical report. Image engineering 107(411), 155-159, 2007-12-31

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  • 20

    Property of the complex amplitude with complex hadamard transform  [in Japanese]

    TANAKA Ken-ichi , ISOI Ryota , FUJITA Yasuhito

    フーリエ変換,アダマール変換などは画像符号化などをはじめとした画像情報処理に使われている.その多くの場合,これらの変換は実数が用いられている.フーリエ変換については,光情報処理に使われる理由から,複素数として情報を利用されている.その例としては計算機ホログラムからの3次元像再生があげられる.アダマール変換については,これまでの研究のほとんどが実数値のものに限られてきたため,複素数値に関する性質を扱 …

    IEICE technical report. Image engineering 107(358), 7-10, 2007-11-22

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