METHOD FOR DETECTING A DOCUMENT BOUNDARY

摘要

A method for detecting a document boundary in a captured digital image depicting a hardcopy document on a background. Each color channel of the captured digital image is analyzed to determine a corresponding busyness metric representing a complexity level of the image data. The color channel having a lowest busyness level is selected and analyzed to detect a document boundary of the depicted hardcopy document. The detected document boundary can be used to perform a perspective correction process to determine a corrected digital image where the depicted document has a substantially rectangular boundary

主权项

1. A method for detecting a document boundary in a captured digital image of a document, the method implemented at least in part by a data processing system and comprising:
receiving a color digital image captured using a digital imaging system that depicts a hardcopy document on a background, wherein the color digital image includes image data for a plurality of color channels; for each of the color channels analyzing the image data to determine a corresponding busyness metric, the busyness metric representing a complexity level of the image data; selecting the color channel having a lowest busyness level; analyzing the image data for the selected color channel to detect the document boundary of the depicted hardcopy document; and storing an indication of the detected document boundary in a processor-accessible memory.