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US 2016/0253571 A1Published application
Methods and Systems for Suppressing Non-Document-Boundary Contours in an Image
AssigneeSharp Laboratories of America, Inc.
InventorRichard John Campbell
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Abstract
Aspects of the present invention are related to systems, methods and apparatus for boundary detection, in an image, by suppression of contours resulting from background textures and text in the image.
Claims20
A method for generating a plurality of candidate boundary contours from a document image, said method comprising:
- preprocessing a document image to form a medium-scale luminance image and a low-scale luminance image;
- extracting a plurality of corner features from said medium-scale luminance image;
- extracting a plurality of edge features from said low-scale luminance image;
- determining a plurality of vanishing points;
- detecting one or more text regions in a corner-feature image associated with said plurality of corner features;
- generating an initial plurality of candidate boundary contours in an edge-map image associated with said plurality of edge features;
- and
- filtering said initial plurality of candidate boundary contours using said one or more text regions.
5 more elements
A non-transitory computer-readable medium encoded with a computer program code for causing a processor to execute a method for generating a plurality of candidate boundary contours from a document image, said method comprising:
- preprocessing a document image to form a medium-scale luminance image and a low-scale luminance image;
- extracting a plurality of corner features from said medium-scale luminance image;
- extracting a plurality of edge features from said low-scale luminance image;
- determining a plurality of vanishing points;
- detecting one or more text regions in a corner-feature image associated with said plurality of corner features;
- generating an initial plurality of candidate boundary contours in an edge-map image associated with said plurality of edge features;
- and
- filtering said initial plurality of candidate boundary contours using said one or more text regions.
5 more elements
Dependencies are inferred from the claim text.