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:
Dec. 07, 1999
Filed:
Jun. 26, 1997
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Abstract
All possible image levels of image data are input to tone conversion characteristics, and a tone jump included in the image after tone conversion is detected from the resultant output data. An A-type contour line and a B-type contour line constituting the contours of a target area for tone interpolation are obtained from the multi-tone image. The target area is then detected by checking the inclusive relationship between the A-type and B-type contour lines to extract at least one set of contour lines indicating the contour of the target area. In the target area, an area defined by the A-type contour line and the B-type contour line is divided into (N+1) divided areas, and N intermediate image levels are sequentially allocated to the N divided areas of the (N+1) divided areas.