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:
Jun. 25, 2002
Filed:
Jan. 14, 1999
Naoko Hamamura, Yokohama, JP;
Haruko Kawakami, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An image processing apparatus aiming at enhancing image quality of a character (line image component) includes an image area discrimination section for discriminating an image area (character area). In the image area discrimination section, a color converter section converts an input CMY signal to Y′-, I′- and Q′-signals for discrimination. An LPF section performs a smoothing process for the Y′-signal and an output signal from a line memory, which is a line delay signal of the Y′-signal. A density gradient extraction section generates a density gradient equivalent amount from a smoothed output from the LPF section and output signals from line memories, which are line delay signals of the output form the LPF section. An arithmetic section performs an arithmetic operation based on the density gradient equivalent amount generated by the arithmetic section, the Y′-signal, and a predetermined value from a main CPU.