System and method providing subpixel-edge-offset-based determination of opacity
AssigneeMicrosoft Corporation
InventorsAndrew Blake, Kentaro Toyama
Life of this patent
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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 a 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.
Claims13
A method for integrating extracted images, comprising:
- selecting a set of contour pixels defining a foreground region of an image;
- determining a subpixel edge offset from the center of each contour pixel;
- and
- determining an area of a portion of each contour pixel utilizing the subpixel edge offset to determine an opacity value (a) for each contour pixel.
A system for integrating extracted images, comprising:
- means for selecting a set of contour pixels defining a foreground region of an image;
- means for determining a subpixel edge offset from the center of each contour pixel;
- and
- means for determining an area of a portion of each contour pixel utilizing the subpixel edge offset to determine an opacity value (α) for each contour pixel.
A signal facilitating integration of extracted images, comprising:
- a signal for communicating information associated with an image;
- a first component for selecting a set of contour pixels defining a foreground region of the image via the signal, wherein the component determines a subpixel edge offset from the center of each contour pixel, and determines an area of a portion of each contour pixel utilizing the subpixel edge offset to determine an opacity value (α) for each contour pixel;
- and
- a second component utilizing the opacity value (α) via the signal to smoothly mix the foreground region of the image with a subsequent background region associated with another image.
Dependencies are inferred from the claim text.