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:
Jan. 03, 1995
Filed:
May. 08, 1992
Konstantin Othmer, San Jose, CA (US);
Bruce A Leak, Palo Alto, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
This invention provides a method for compositing a source image and a destination image using a mask image to produce a result image in a digital image processing system. The method is, on a pixel-by-pixel basis, using the mask image to select between the source and destination images: where a black color value for a mask pixel selects the color value of the corresponding pixel of the source image; and a white color value for a mask pixel selects the color value of the corresponding pixel of the destination image; and where an intermediate color value for a mask pixel selects a weighted average between source and destination pixel color values. The calculations of the weighted average color value are done in color space, such as on a color component by color component basis. The result image can be displayed or stored for further use. This method can be described in boolean expression according to the formula: