Boots – shoes – and leggings
Patent
1984-02-18
1987-03-31
Harkcom, Gary V.
Boots, shoes, and leggings
364415, 433 26, 4332031, G06F 1542, A61C 1308, A61C 1910
Patent
active
046547940
ABSTRACT:
Polychromatic light is directed at the surface of a live tooth and color data of light reflected therefrom is recorded, multiplied by the stored power distribution of a first standard illuminant and converted to three tristimulus values. Such values are compared with color values of a first group of stored color dental shades, and if a match occurs within a given tolerance, an indication of the nature of the recipe is produced. A second level search may be carried out against a substantially larger group of stored dental shades in the event of a no-match condition resulting from the first search. Excellent lifelike reproduction of the patient's tooth is enhanced by checking for least metamerism by operating upon the measured data with other illumination standards and selecting the best match under all lighting conditions. Additionally, a translucency factor is calculated, and employed to reduce the opacity of the inner opaque layer of the recipe which would otherwise be indicated should the patient's tooth not have a high degree of translucency. The calculation of a fluorescence factor also enhances excellent reproduction of the live tooth, and is employed to indicate the addition of a fluorescent ingredient to the final recipe.
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Colorgen, Inc.
Denninger Douglas E.
Harkcom Gary V.
Iandiorio Joseph S.
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