David P Macfarlane

US Patent:

53132670, May 17, 1994

Filed:

Feb 22, 1993

Appl. No.:

8/021657

Inventors:

Darby S. MacFarlane - Hastings On Hudson NY
David K. MacFarlane - Hastings On Hudson NY
Fred W. Billmeyer - Schenectady NY

Assignee:

Chromatics Color Sciences International Inc. - Hastings on Hudson NY

International Classification:

G01J 350
G01J 352

US Classification:

356405

Abstract:

Skin coloration categories are identified based upon blue and yellow undertones of the skin using a color measuring device, developing the Hunter b value, utilizing that value alone to determine which of several categories of skin coloration a subject's skin exhibits. Category selection is made by comparison of measured Hunter b with ranges of Hunter b value of skin color categories. Instrumentation to effect the method includes the color measuring device, a central processing unit (CPU), memory storing the ranges of Hunter b, and an output device such as a printer, LCD, or CRT. The skin color Hunter b is calculated and compared to stored ranges to assign a category. The output device displays the category of skin color based upon the central processing unit's comparison. Colors compatible with skin color categories are identified or formulated based upon broad color family designation, yellow, brown, red, etc. , and a comparison of measured and stored ranges of known or specially developed color characteristics for the particular family.

US Patent:

53112938, May 10, 1994

Filed:

Jan 29, 1993

Appl. No.:

8/013200

Inventors:

Darby S. MacFarlane - Hastings On Hudson NY
David K. MacFarlane - Hastings On Hudson NY
Fred W. Billmeyer - Schenectady NY

Assignee:

Chromatics Color Sciences International, Inc. - New York NY

International Classification:

G01J 352

US Classification:

356421

Abstract:

Skin coloration categories are identified based upon blue and yellow undertones of the skin using a color measuring device, developing the Hunter b value, utilizing that value alone to determine which of several categories of skin coloration a subject's skin exhibits. Category selection is made by comparison of measured Hunter b with ranges of Hunter b value of skin color categories. Instrumentation to effect the method includes the color measuring device, a central processing unit (CPU), memory storing the ranges of Hunter b, and an output device such as a printer, LCD, or CRT. The skin color Hunter b is calculated and compared to stored ranges to assign a category. The output device displays the category of skin color based upon the central processing unit's comparison. Colors compatible with skin color categories are identified or formulated based upon broad color family designation, yellow, brown, red, etc. , and a comparison of measured and stored ranges of known or specially developed color characteristics for the particular family.