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. 16, 1998
Filed:
Dec. 21, 1994
Yuzuru Suzuki, Kanagawa, JP;
Yoshiharu Hibi, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image-area identifying system for a color image processing apparatus comprises: image area identifying means for identifying a character area or a half-tone image area by using characteristic values of pixels in each pixel block of an image area; hue determining means for determining, every pixel, hue of received color image data to produce a necessary color switch signal or an unnecessary color switch signal; and data reset means for resetting unnecessary image data on the basis of the results of the block-basis area identifying determination by the image area identifying means and the pixel-basis hue determination by the hue determining means. The image area identifying means may be nonlinear quantitizers for quantitizing three characteristic values, 'in-block average value', 'number of in-block high-level pixels' (Ph), and 'number of in-block medium-level pixels' (Pm) for reducing the quantities of data representing the three characteristic values, and a three-dimensional look-up table accessed by the output data of the nonlinear quantitizers, to produce a character area data signal or a half-tone image data signal.