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:
Mar. 06, 2012
Filed:
Sep. 21, 2006
Claus Nico Cordes, Eindhoven, NL;
Nalliah Raman, Singapore, SG;
Claus Nico Cordes, Eindhoven, NL;
Nalliah Raman, Singapore, SG;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method of enhancing details in an input image. The input image comprises input pixels, which have input pixel values (IPV) limited to a range (RA). The method comprises average filtering () the input pixel values (IPV) to obtain average brightness values (LV). A luminance mask is applied () to the average brightness values (LV) to obtain masked values (MV) which are different for average brightness values (LV) in a sub-range (SR) of the range (RA) than for pixels outside the sub-range (SR). The input pixel values (IPV) are detail filtered () to obtain detail values (HV) indicative for an amount of detail. A non-linear function (NLF) is applied () on the input pixel values (IPV) to obtain for each input pixel value (IPV) a corresponding output pixel value (OPV). A gain of the non-linear function (NLF) is dependent on both the masked value (MV) and detail value (HV) which both are determined for the particular input pixel. The gain is higher for input pixels with input pixel values (IPV) outside the sub-range (SR) than for input pixels with input pixel values (IPV) inside the sub-range (SR). And the gain is higher for input pixels for which the detail value (HV) indicates more high frequency content in the image portion around the particular input pixel than for input pixels for which the detail value (HV) indicates less high frequency content.