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:
Apr. 18, 1995
Filed:
Sep. 09, 1993
Joji Tajima, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An image coloring/recoloring apparatus can provide natural-looking color images of an object illuminated by a source color. An input color image or a shaded image (grey scale image) which corresponds to the object is input to the coloring/recoloring apparatus. The coloring/recoloring apparatus logarithmically transforms a pixel sub-region corresponding to all or a portion of the object into intermediate color density data, which lies on a straight line in a color density space. This straight line starts at a point in the color density space corresponding to the source color and has a direction corresponding to the object's absorptive properties. By inputting a desired color and/or a new source color, it is possible to create a new image, which shows the object with the sub-region painted the desired color while being illuminated by the new source color.