权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Creation of wood figure patterns for printing by means of computer graphics.

通过计算机图形创建用于印刷的木纹图案。

基本信息

批准号：
09556035
负责人：
MASUDA Minoru
金额：
$ 2.82万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09556035/
关键词：
wood grain figure computer graphics glossiness gloss psychological image color interior design printing 光沢

项目摘要

Creation of wood grain figures using computer graphics (CG) technique has great significance in following two points ; i) generation of beautiful and excellent wood grain figures of great trees, ii) flexible generation of wood grain figures suitable for the specific use and design.The results are summarized as follows :1) Relations of RGB values of wood colors were derived.2) CG-images with brighter high-light regions had "Akarui (bright)" "Karui (light)" and "Yofu-na (western style)" images, and images with darker high-light regions had "Ochitsuita (calm)" "Shibui (tasty)" and "Juko-na (heavy)" images.3) "Hadena (showy)" "Hakkirishita (clear)" and "Arai (rough)" images were made by enlarging the standard deviation of RGB-value histogram, because the treatment enlarged contrast between early-wood and late-wood in the CG-image. On the other hand, if contrast became smaller, the image had "Bon'yari-shita (obscure)" and "Awai (pale)" images. The optimum contrast value for "Kanjino-yoi (agreeable)" image was about 1.5 in Munsell value.4) Micro patterns called "pear-skin" varies according to rays or cell-arrangements of wood. Micro patterns of hard wood were clearer than that of soft wood. Printed grain figures with micro patterns of hard wood had more real appearance of wood.5) Gradation of shadings, which had low-spatial frequency and irregular arrangement, contributed to the real appearance of CG-images.

利用计算机图形学（CG）技术生成木材纹理图形，在生成美观、优秀的大树木材纹理图形和灵活生成适合具体用途和设计的木材纹理图形两方面具有重要意义。1）推导了木材颜色的RGB值之间的关系。2）具有较亮高光区域的CG图像有“Akarui（亮）”、“Karui（亮）”和“Yofu-na（西式）”图像，并且具有较暗高光区域的图像具有“Ochitsuita（平静）”、“Shibui（美味）”和“Juko-na（沉重）”图像。3）“Hadena（艳丽）”、“Hakkirishita（清晰）”和“Arai（粗糙）”图像通过放大RGB值直方图的标准偏差来制作，这是因为处理扩大了CG图像中早材和晚材之间的对比度。另一方面，如果对比度变小，则图像具有“Bon'yari-shita（模糊）”和“Awai（苍白）”图像。4）“梨皮纹”的微观形态因木材的射线或细胞排列而异。硬质木材的微观纹理比软质木材清晰。5）纹理的层次性，空间频率低，排列不规则，有助于CG图像的真实的感。