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:
Oct. 16, 2007
Filed:
Nov. 20, 1998
Mitsuaki Nakamura, Tenri, JP;
Keisuke Iwasaki, Nara, JP;
Mitsuaki Nakamura, Tenri, JP;
Keisuke Iwasaki, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In an image processing device, in order to display an image on a display device having nonlinear gradation characteristics, first, a contrast estimation unit () estimates the contrast of the image represented by the image data () input from an image input device. Next, a luminance correction unit () subjects the pixel data constituting the image data () to a luminance conversion process on the basis of the estimated contrast and the gradation characteristics. Furthermore, the pixel data may sometimes be subjected to a sharpening process. The level of the sharpening performed for one or a plurality of character regions in the image represented by the image data () is higher than that for the pixel data of the pixels in remaining regions other than the character regions in the image. The image data () comprising the pixel data subjected to these processes is supplied to the display device. Therefore, the visibility of the image displayed on the display device can be improved.