Extraction of Glossiness of Curved Surfaces by the Use of Spatial Filter Simulating Retina Function

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概要

• 論文の詳細を見る

• Although the perception of gloss is based on human visual perception, some methods for extracting glossiness, in contrast to human ability, have been proposed involving curved surfaces. Glossiness defined in these methods, however, does not correspond with psychological glossiness perceived by the human eye over the wide range from relatively low gloss to high gloss. In addition, the obtained glossiness in these methods changes remarkably when the curvature radius of the high-gloss object becomes larger than 10 mm. In reality, psychological glossiness does not change. These methods, furthermore, are available only for spherical objects. A new method for extracting glossiness is proposed in this study. For the new definition of glossiness, a spatial filter which simulates human retina function is utilized. The light intensity distribution of the curved object is convoluted with the spatial filter. The maximum value H_<max< of the convoluted distribution has a high correlation with psychological glossiness G_<ph<. From the relationship between G_<ph< and H_<max<, new glossiness G_f is defined. The gloss-extraction equipment consists of a light source, TV camera, an image processor and a personal computer. Cylinders with the curvature radii of 3-30 mm are used as the specimens in addition to spherical balls. In all specimens, a strong correlation, with a correlation coefficient of more than 0.97, has been observed between G_f and G_<ph< over a wide range. New glossiness G_f conforms to G_<ph< even if the curvature radius is more than 10 mm. Based on these findings, it is found that this method for extracting glossiness is useful for the extraction of glossiness of spherical and cylindrical objects over a wide range from relatively low gloss to high gloss.

• 社団法人電子情報通信学会の論文
• 1994-03-25

著者

• Shimomura T

  Kyushu Inst. Technol. Kitakyushu‐shi Jpn

• Shimomura Teruo

  Faculty Of Engineering Kyushu Institute Of Technology

• SERIKAWA Seiichi

  Kyushu Institute of Technology

• Serikawa Seiichi

  Faculty of Engineering, Kyushu Institute of Technology

• Serikawa S

  Kyushu Inst. Technol.

• Serikawa Seiichi

  Faculty Of Engineering Kyushu Institute Of Technology

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