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. 11, 2015
Filed:
May. 31, 2012
Suk Hwan Lim, Mountain View, CA (US);
D. Amnon Silverstein, Palo Alto, CA (US);
Guy Cote, San Jose, CA (US);
Steven David Hordley, Los Gatos, CA (US);
Graham Finlayson, Cupertino, CA (US);
Weichun Ku, San Jose, CA (US);
Joseph P. Bratt, San Jose, CA (US);
Suk Hwan Lim, Mountain View, CA (US);
D. Amnon Silverstein, Palo Alto, CA (US);
Guy Cote, San Jose, CA (US);
Steven David Hordley, Los Gatos, CA (US);
Graham Finlayson, Cupertino, CA (US);
Weichun Ku, San Jose, CA (US);
Joseph P. Bratt, San Jose, CA (US);
APPLE INC., Cupertino, CA (US);
Abstract
Systems and methods for local tone mapping are provided. In one example, an electronic device includes an electronic display, an imaging device, and an image signal processor. The electronic display may display images of a first bit depth, and the imaging device may include an image sensor that obtains image data of a higher bit depth than the first bit depth. The image signal processor may process the image data, and may include local tone mapping logic that may apply a spatially varying local tone curve to a pixel of the image data to preserve local contrast when displayed on the display. The local tone mapping logic may smooth the local tone curve applied to the intensity difference between the pixel and another nearby pixel exceeds a threshold.