20种红木类木材颜色和光泽度研究

Study on the color and luster of twenty species of rosewood

为了探索红木类木材表面的视觉特性的分布特征,测量了20种红木类木材颜色L*a*b*色空间物理量、平行于木材纹理方向的光泽度(GZL)和垂直于木材纹理方向的光泽度(GZT),建立了L*a*b*三维空间坐标系,并对20种红木类木材进行聚类分析,深入剖析了20种红木类木材视觉物理量的分布特征和相关关系。结果表明,20种红木类木材的明度值普遍较低,基本属于偏暗红色和红褐色的色调范围,根据聚类分析,乌木类、条纹乌木、黑酸枝类木材归为第一大类,花梨木类、香枝木类和红酸枝类木材归为第二大类;平行于木材纹理方向的光泽度值比垂直于纹理方向的光泽度值大,红木类木材的表面光泽度比普通木材高;明度L*、色调H都与红绿色品指数a*之间呈显著的负相关,与黄蓝色品指数b*呈正相关,色饱和度C与黄蓝色品指数b*呈显著的正相关。试验结果为红木类木材制品的综合评价提供了理论基础。

In order to explore the visual characteristics of rosewood,the wood color parameters of lightness（ L＊）,redness（ a＊） and yellowness（ b＊） and the wood luster parameters parallel and perpendicular to the grain direction of twenty species of rosewood were examined quantitatively. The data collected were the L＊a＊b＊color space,and a clustering analysis was carried out. The distribution characteristics and the correlations of the visual parameters were analyzed profoundly. The results showed that the lightness of the twenty species of rosewood is generally low,ranging from the dim red to reddish brown. According to the cluster analysis,the Diospyros spp. wood,Diaspyros spp. wood and Dalbergia spp. wood were classified as the first category. The Pterocarpus spp. wood,Dalbergia spp. wood and Dalbergia spp. wood were classified as the second category. The wood luster parameters parallel to the grain were greater than that perpendicular to the grain. The luster parameters of the rosewood were greater than those of the other species wood. The lightness（ L＊） and the hue（ H） exhibited a significantly negative correlation with a＊and positive correlation with b＊. The color saturation（ C） displayed a significantly positive correlation with b＊.