David R Simons

US Patent:

20120170842, Jul 5, 2012

Filed:

Dec 31, 2010

Appl. No.:

12/983131

Inventors:

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

Assignee:

MICROSOFT CORPORATION - Redmond WA

International Classification:

G06T 5/00

US Classification:

382167, 382274

Abstract:

A method for tone mapping a high dynamic range image of a large terrestrial area into a lower dynamic range image uses: 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.

US Patent:

20170161878, Jun 8, 2017

Filed:

Feb 20, 2017

Appl. No.:

15/437140

Inventors:

- Redmond WA, US
Yuxiang Liu - Superior CO, US
Wolfgang Schickler - Broomfield CO, US
Robert Ledner - Boulder CO, US
Leon Rosenshein - Louisville CO, US
David Simons - Louisville CO, US

Assignee:

Microsoft Technology Licensing, LLC - Redmond WA

International Classification:

G06T 5/00
G06T 7/60
G06T 5/20

Abstract:

Techniques for atmospheric and solar correction of aerial images are described. An apparatus may comprise an atmospheric and solar component arranged for execution by a logic device and operative to correct solar and atmosphere artifacts from an aerial image. The atmospheric and solar component may comprise an image information component operative to generate an image record for each aerial image of a group of aerial images, the image record comprising statistical information and image context information for each aerial image, a filter generation component operative to generate an atmospheric filter and a solar filter from the statistical information and the image context information stored in the image records, and an image correction component operative to correct atmospheric and solar artifacts from the aerial image using the respective atmospheric filter and solar filter. Other embodiments are described and claimed.