Extraction and representation of sensory and emotional characteristics of wood.

1)为什么木材像丝绸一样有优雅而深沉的光泽？这可能与木材细胞的透明度和光的微镜面反射有关。我们尝试用摄像机从不同距离拍摄的数字图像数据来计算光泽和纹理的这一特征。模拟大脑视觉感知的多分辨率神经网络，从微观分辨率到宏观分辨率计算不同的对比度。观察和计算了各种材料，如木材、印刷木纹图形、木塑复合材料、刨花板、纸张、石头和木粉混合塑料。使用100ma分辨率的微阶对比似乎能给心理“深层”纹理图像带来很好的相关性。需要进一步调查以获得准确和精确的结果。该方法不仅对材料纹理的视觉特征进行了研究，还对不同宽度、不同距离、不同变化的条纹、各种木纹图形等视觉图案进行了研究。太强和太弱的对比度都不太好，而最佳的对比度被观察到“令人满意”的图像。并尝试用分形维数来表达纹理的不同特征。2)观察不同的材料在触摸和摩擦时是否有不同的反应。很难发现脑电波中不同物质之间的差异。需要进一步调查。3)为探讨木质乐器“软”像产生的原因，利用计算机合成了不同频谱、不同衰减的敲击木材的声音。结果表明，高偏度的快速衰减对“自然”图像的影响很大。

1) Why wood has elegant and deep gloss like silk? It may thought that transparency of wood cells and micro specular reflection from lumina have some thing to do with it. We tried to numerise this feature of gloss and texture using digital image data took from different distance by video-camera. The different contrasts were calculated using from micro to macro resolutions simulating multi-resolution neural network for visual perception in brain. Various maaterials were observed and calculated, for example, wood, printed wood grain figures, wood plastics composites, particleboard, papers, stones and wood powder mixed plastics. Micro order contrast using 100mum resolution seems to give good correlation between psychological "deep" texture image. Further investigation is needed for accurate and precise results. This method was applied not only to investigate visual characteristics of material texture but also some visual patterns, for example, stripes of different width and different distance with different variation and various wood grain figures. Too strong and also too weak contrast were not good, and optimum contrast was observed for "agreeable" image. Fractal dimension was also tried to use to express different feature of texture.2) Brain waves were also observed whether there exists different response between different materials when touch and rub them. It was difficult to detect differences between materials in brain waves. Further investigation is required.3) To investigate the cause of "soft" image of wooden instruments, sounds of tapping wood with different frequency spectra and different decrements were synthesized using a computer. The results were that fast decrement of high partial has great influence on "natural" image.