REMOVAL OF BACKGROUND IMAGE FROM WHITEBOARD, BLACK
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专利名称：REMOVAL OF BACKGROUND IMAGE FROM
WHITEBOARD, BLACKBOARD, OR
DOCUMENT IMAGES
发明人：Babak Forutanpour
申请号：US11533692
申请日：20060920
公开号：US20080069441A1
公开日：
20080320
专利内容由知识产权出版社提供
专利附图：
摘要：Methods and apparatus for removing a background image from a captured image are provided. The background is removed by computing a set of representative
values (e.g., median values) based on component values of pixels within a portion of interest of the captured image. The captured image is divided into a plurality of sub-blocks. For each sub-block, it is determined whether a predetermined minimum number of similar pixels are found, a similar pixel having component values within a predetermined threshold of the representative values. If the minimum number of similar pixels is found, it is assumed that the sub-block does not comprise part of the background and is retained. If the minimum number of similar pixels is not found, it is assumed that the sub-block comprises part of the background and component values of pixels of the sub-block are set to predetermined values.
申请人：Babak Forutanpour
地址：Carlsbad CA US
国籍：US
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