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用超光谱图像方法分析发胶对头发颜色的影响研究

更新日期:2017年04月28日


Effects of hair sprays on colour perception: a hyperspectral imaging approach to shine and chroma on heads

用超光谱图像方法分析发胶对头发颜色的影响研究



  Abstract


  OBJECTIVES: Hair sprays apply fixative ingredients to provide hold to a hair style as well as weather resistance and optical properties such as shine. Generally, sprays distribute fine particles containing polymeric ingredients to form a thin film on the surface of hair. Dif- ferent hair types require different strengths of the formed deposit on the hair surface. The present study shows how sprays also alter the visibility of the hair colour by altering the surface topology of the hair fibres.

  目标:发胶作为固定性成分既可以能够使头发保持一定的形状也可以抵挡气候变化及光照损伤。总体而言,发胶分布成含有多聚物成份的小的片段,在头发表面形成厚厚的膜。不同的发型要求在头发表面要形成不同的分布的力度。目前的研究表明,发胶通过改变头发纤维表面的组织结构改变头发的颜色。


  METHODS: Hyperspectral imaging is used to map spectral charac- teristics of hair on mannequins and panelists over the curvature of heads. Spectral and spatial characteristics are measured before and after hair spray applications. The hair surface is imaged by SEM to visualize the degree of cuticle coverage. Finally, the perception of hair colour was evaluated on red-coloured mannequins by con- sumer questionnaire.

  方法:超光谱图像发用于描述人体模型和测试组头发的光谱模型,测试发胶使用前和后头发的光谱和空间弯曲特性。头发表面通过SEM成像到可见发膜覆盖。最后,通过红颜色的人体头发模型和消费者问卷调查来评估对头发颜色的看法。


  RESULTS: Hair sprays deposit different degrees of fixatives, which lead to a progressive leveling of the cuticle natural tilt angle with respect to the fibre axis. As a result, shine is progressively shifting towards the region of hair colour visibility and decreases the perceived colour of hair seen by consumers. Lighter sprays show thinner film formation on the hair surface and less of a shine shift than strong hold hair sprays.

  结果:发胶对固定程度有着不同的影响,能够大幅的改变护膜的自然倾斜角。阳光能大大改变局部头发颜色,降低人们对头发视觉上的看法。少用发胶在头发表面膜层薄,在阳光下的颜色变化也会更少一些。


  CONCLUSIONS: Hair sprays are generally employed for hair style hold and weather resistance and considered without effect on hair colour. Our approach shows that spray-deposited films can affect colour perception by altering the microstructure of the hair surface. Thin films deposited on the hair fibre surface can partially fill gaps between cuticles, which reduces the cuticle natural angle. This partial erasure results in a angle shift of the shine regions towards the angle of internal reflection, thus decreasing the perceived hair col- our regions as experienced by a group of consumers.

  结论:发胶用于定型和抵抗风吹等天气变化,对头发颜色没有影响。我们的方法显示,发胶膜通过改变头发表面的微结构来影响人们对头发的颜色看法。头发表面的薄膜能够填充角质膜的空隙,降低护膜的自然弯曲的角度。通过一组消费者评估,部分消除膜导致内部反射角度的改变,从而降低对头发颜色的感知。




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