| 摘要 |
PROBLEM TO BE SOLVED: To make quantitatively evaluatable a brilliant feeling by irradiating the surface of a coating film with light to pick up the image thereof and analyzing the image to measure a two-dimensional power spectrum value. SOLUTION: At first, the surface of a coating film containing a brilliant agent is irradiated with light and the irradiated coating surface is photographed at an angle not permitting the incident of the regular reflected light thereof with a CCD camera 12 to obtain the image thereof. This image is subjected to two-dimensional Fourier transform to obtain an image of a space frequency spectrum. A low space frequency component is extracted from the image and integrated to be normalized by a DC component to calculate a value and a two-dimensional power spectrum value, from this value by formula. According to these spectrum values, the brilliant feeling of the coating film coating the brilliant agent is quantitatively evaluated.
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