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:
May. 27, 2014
Filed:
Dec. 31, 2010
Yuxiang Liu, Superior, CO (US);
Wolfgang Schickler, Broomfield, CO (US);
Leon Rosenshein, Louisville, CO (US);
David Simons, Louisville, CO (US);
Ido Omer, Seattle, WA (US);
Rob Ledner, Boulder, CO (US);
Yuxiang Liu, Superior, CO (US);
Wolfgang Schickler, Broomfield, CO (US);
Leon Rosenshein, Louisville, CO (US);
David Simons, Louisville, CO (US);
Ido Omer, Seattle, WA (US);
Rob Ledner, Boulder, CO (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A method for tone mapping a high dynamic range image of a large terrestrial area into a lower dynamic range image uses a globally aware, locally adaptive approach whereby local tonal balancing parameter values are derived from known tone mapping parameters for a local 3×3 matrix of image tiles and used in turn to derive a local sigmoid transfer function for pixels in the tile in the middle of the matrix. A global sigmoid transfer function is derived based on values of the tone mapping parameters applicable to the entire image. A lower dynamic range image pixel will have a local tone mapped value and a globally tone mapped value, which are combined by giving each a weighted value to provide a final low dynamitic range pixel value.