The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2002
Filed:
May. 28, 1998
Günter Bestmann, Altenholz, DE;
Heidelberger Druckmaschinen Aktiengesellschaft, Heidelberg, DE;
Abstract
In a method and apparatus for conversion of color values of a color negative according to a positive/negative reversal function [R , G , B =f(R , G , B )] color values (R , G , B ) for the three color components are acquired by optoelectronic scanning of a color negative in a color scanner. The image luminance value (BL , BL , BL ) and the image depth value (BT , BT , BT ) of the color negative as well as the corresponding density ranges (&Dgr;D , &Dgr;D , &Dgr;D ) are determined from the color values (R , G , B ) in an image analysis unit for each color component. The positive/negative reversal function is determined in a calculating stage from the density ranges (&Dgr;D , &Dgr;D , &Dgr;D ) and a defined density range (&Dgr;D′). The positive/negative reversal function is deposited in a table memory as a value table. The color values (R , G , B ) of the color negative are then converted into the color values (R , G , B ) of the corresponding color positive with the stored value table.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile