US Patent 7315647 System and method providing subpixel-edge-offset-based determination of opacity

Patent 7315647 was granted and assigned to Microsoft on January, 2008 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

Microsoft

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7315647

Date of Patent

January 1, 2008

Patent Application Number

10967722

Date Filed

October 18, 2004

Patent Primary Examiner

‌

Ishrat Sherali

Patent abstract

A system is provided for selecting a foreground region of an image, given a set of pixels defining the boundary of the foreground region of the image. The system includes a component to determine a foreground value (F) and opacity value (α) for each pixel on the set wherein α is determined via a subpixel edge-offset to facilitate a separation the foreground region from background portions of the image. The foreground value (F) and opacity value (α) are then employed to smoothly mix the foreground region of the image with a subsequent image background region.

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