原 健二 HARA Kenji

ID:9000045430989

九州大学大学院芸術工学研究院コミュニケーションデザイン科学部門 Department of Communication Design Science, Faculty of Design, Kyushu University (2014年 CiNii収録論文より)

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Articles:  1-19 of 19

  • D-11-45 Selecting Colors of Tiles and Joints in Mosaic-Like Images  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    Proceedings of the IEICE General Conference 2014年_情報・システム(2), 45, 2014-03-04

  • Density Estimation of Random-Valued Impulse Noise  [in Japanese]

    INOUE Kohei , HARA Kenji , URAHAMA Kiichi

    密度が未知のランダム値インパルス性雑音(random-valued impulse noise: RVIN)によって劣化した画像が与えられるとき,その画像から,RVINの密度を推定する方法を提案する.グレースケール画像を用いた実験により,本方法の有効性を検証する.

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 113(433), 181-186, 2014-02-17

  • Miniature Faking Using Smoothing and Sharpening  [in Japanese]

    Inoue Kohei , Suenaga Katsuya , Hara Kenji , Urahama Kiichi

    画像を部分的に平滑化することによって現実のシーンをミニチュアのように見せるミニチュア風写真において,平滑化しない領域を鮮鋭化することによって画像内容をよりミニチュアらしく見せる方法を提案し,主観評価実験によってその有効性を確認する.

    The Journal of The Institute of Image Information and Television Engineers 68(2), J108-J110, 2014

    J-STAGE 

  • I-047 Generating Mosaic-Like Images by Scaling Centroidal Voronoi Regions  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    情報科学技術フォーラム講演論文集 12(3), 349-350, 2013-08-20

    IPSJ 

  • D-11-42 Integral Image-Based Color Halftoning  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    Proceedings of the IEICE General Conference 2013年_情報・システム(2), 42, 2013-03-05

  • Edge-Preserving in Centroidal Voronoi Tessellation-Based Halftoning  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    Conventional centroidal Voronoi tessellation (CVT) in an image plane divides the plane into several Voronoi regions. Generally, the boundaries of Voronoi regions do not coincide with the edges of the …

    The Journal of The Institute of Image Information and Television Engineers 67(11), J410-J412, 2013

    J-STAGE 

  • Integral Image-Based Halftoning  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose a method for generating halftone images from grayscale images based on their integral images. The pixel values of a halftone image are determined so that the errors between the integral ima …

    The Journal of The Institute of Image Information and Television Engineers 67(8), J303-J305, 2013

    J-STAGE 

  • Gradient Norm-Based Histogram Equalization  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose a method for enhancing the contrast of grayscale images by equalizing their weighted histograms on the basis of the gradient norm, and we quantitatively evaluate the effectiveness of the pr …

    The Journal of The Institute of Image Information and Television Engineers 67(8), J296-J299, 2013

    J-STAGE 

  • Content-Aware Image Resizing Based on Row/Column Clustering  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose an image resizing method using row/column removal and addition based on the clustering of rows and columns in an image. To shrink an image, we first separately cluster a set of rows and a s …

    The Journal of The Institute of Image Information and Television Engineers 67(2), J45-J52, 2013

    J-STAGE 

  • 8-4 Identifying Computer Generated and Digital Camera Images Based on a Generalized Laplacian Distribution  [in Japanese]

    Murakami Toshiki , Hara Kenji , Inoue Kohei , Urahama Kiichi

    A method for differentiating between computer generated and digital camera images based on wavelet analysis is presented. This scheme models the marginal distribution of a wavelet coefficients using a …

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION 2013(0), 8-4-1-_8-4-2_, 2013

    J-STAGE 

  • 3-1 Surface Radiance Correction for Shape-from-Shading with Reflectance Property Estimation  [in Japanese]

    Matsuda Takaki , Hara Kenji , Inoue Kohei , Urahama Kiichi

    It is widely known that especially rough surfaces exhibit reflectance that is not well modelled by Lambert's law. In this case, standard Lambertian-based shape-from-shading methods cannot be appl …

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION 2013(0), 3-1-1-_3-1-2_, 2013

    J-STAGE 

  • 1-7 Color Image Enhancement by Brightness Histogram Equalization and Saturation Maximization in Equihue Plane  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose a method for enhancing a color image by equalizing its brightness histogram and maximizing the saturation of each pixel color in its equihue plane.

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION 2013(0), 1-7-1-_1-7-2_, 2013

    J-STAGE 

  • 13-15 Pixel Art with Round Pixels  [in Japanese]

    Inoue Kohei , Inoguchi Hiroyasu , Hara Kenji , Urahama Kiichi

    We Propose a method for transforming a given pixel art into another pixel art which is composed of round pixels, by using which, we can suppress jagged edgeds in pixel art. Experimental results show t …

    PROCEEDINGS OF THE ITE WINTER ANNUAL CONVENTION 2013(0), 13-15-1-_13-15-2_, 2013

    J-STAGE 

  • An Improved Non-iterative Approximate Solution Method for Two-Dimensional Principal Component Analysis  [in Japanese]

    INOUE Kohei , HARA Kenji , URAHAMA Kiichi

    二次元主成分分析の非反復近似解法において,従来手法と同程度以上の性能が保証された方法を提案し,顔画像データベースを用いた実験でその有効性を確認する.

    The IEICE transactions on information and systems (Japanese edetion) 95(11), 1983-1984, 2012-11-01

    References (6)

  • Minimum Spanning Tree Filters for Edge-preserving Impulse Noise Removal  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose edge-preserving smoothing (EPS) filters based on minimum spanning trees (MSTs) on image planes. The shape of the filter window is adaptively determined for each pixel by the MST, which avoi …

    The Journal of The Institute of Image Information and Television Engineers 66(8), J287-J289, 2012

    J-STAGE 

  • Contrast Enhancement of Color Images with Boundary Colors in RGB Color Space  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose a method for enhancing the contrast of color images by transforming the original colors into the colors on the boundary of RGB color space. Experimental results show that the proposed metho …

    The Journal of The Institute of Image Information and Television Engineers 66(7), J227-J229, 2012

    J-STAGE 

  • 25-1 Gradient Norm-Based Histogram Equalization  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We propose a method for enhancing the contrast of grayscale images by equalizing their weighted histograms based on the gradient norm, and quantitatively evaluate the effectiveness of the proposed met …

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION 2012(0), 25-1-1-_25-1-2_, 2012

    J-STAGE 

  • 8-1 Reflection Component Separation and Light Source Estimation from a Single Image  [in Japanese]

    Matsuda Takaki , Hara Kenji , Inoue Kohei , Urahama Kiichi

    In this paper, we derive a novel framework for jointly estimating the reflectance parameters and diffuse texture of a surface of known geometry and illumination from a single image. Unlike previous wo …

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION 2012(0), 8-1-1-_8-1-2_, 2012

    J-STAGE 

  • Image and Video Clipping by Minimizing Weighted Histogram Intersection  [in Japanese]

    Inoue Kohei , Hara Kenji , Urahama Kiichi

    We describe a method for clipping a rectangular region from an image by minimizing the weighted intersection of two color histograms that are constructed with pixels inside and outside the rectangular …

    The Journal of The Institute of Image Information and Television Engineers 64(11), 1639-1646, 2010

    J-STAGE 

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