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:
Aug. 24, 2010
Filed:
Apr. 18, 2006
Christopher B. Cox, San Jose, CA (US);
Christopher B. Cox, San Jose, CA (US);
Adobe Systems Incorporated, San Jose, CA (US);
Abstract
One embodiment of the present invention provides a system for applying a filter to an image whose pixel values can span a large range of values. During operation the system receives an image to which the filter is to be applied. The system then selects a first region within the image which is associated with a first pixel. Next, the system generates a first histogram using pixels within the first region whose values are within a first range of pixel values. Next, the system determines a new value for the first pixel using the first histogram. The system then selects a second region within the image which is associated with a second pixel. Next, the system determines if the second pixel value is within a second range of pixel values. If the second pixel value is within the second range of pixel values, the system determines a non-overlapping region between the first region and the second region. The system then generates a second histogram using the first histogram and pixel values in the non-overlapping region. Next, the system determines a new value for the second pixel using the second histogram.