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:
Sep. 20, 2005
Filed:
Aug. 31, 2000
Noboru Kubo, Ikoma, JP;
Xiaomang Zhang, Tenri, JP;
Hiroyuki Okuhata, Osaka, JP;
Akimasa Niwa, Osaka, JP;
Noboru Kubo, Ikoma, JP;
Xiaomang Zhang, Tenri, JP;
Hiroyuki Okuhata, Osaka, JP;
Akimasa Niwa, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Synthesis Corporation, Osaka, JP;
Abstract
A method is provided for correcting lightness of an image using a multiscale retinex. Lightness of a subject pixel of an original image is corrected using a convolution operation of a surround function and surround pixels with respect to the subject pixel of the original image, and the convolution operation is performed over a plurality of scales. The surround function has a simplified model such that a value of the surround function is changed in a stepwise way along two axes orthogonal to each other.