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:
Feb. 02, 1999
Filed:
Jan. 11, 1996
A John Michaelis, Glen Ellyn, IL (US);
J Thomas Shively, Hinsdale, IL (US);
R.R. Donnelley & Sons, Lisle, IL (US);
Abstract
A system for converting continuous tone values to output values controls adjacency effects by implementing a look up table which represents the continuous tone values as addresses in order to provide output patterns to a marking device. The output patterns, when rendered, have substantially the same densities as the corresponding continuous tone values. Alternatively, the look up table may store filter values of a filter which is used to filter the output values produced during conversion of continuous tone values to output values. The filter values are accessed by representing, as addresses, the output values corresponding to input values surrounding the input value undergoing filtering. As another alternative, the look up table may include a predetermined set of look up tables. Output values relating to previously converted continuous tone values neighboring a continuous tone value undergoing conversion are used to select one of the look up tables, and the continuous tone value undergoing conversion is used to address the selected look up table to retrieve an output value to which the continuous tone value undergoing conversion is converted.