User selected background noise removal for scanned document images
First Claim
Patent Images
1. A method of processing a digital image corresponding to a scanned document, the method comprising:
- analyzing the image to obtain statistical data;
deriving background noise removal data for the entire image based on the statistical data; and
storing the entire image and the background noise removal data to allow the scanned document to be displayed with background noise removal and without background noise removal.
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Accused Products
Abstract
A system and method of removing background noise from a digital image of a scanned document is described. The system and method is a reversible background noise removal technique that allows a user to select whether background noise is removed or not. In addition, since the present invention divides the background noise removal operations into a two phase process, the overall efficiency of the system and method are significantly improved.
45 Citations
16 Claims
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1. A method of processing a digital image corresponding to a scanned document, the method comprising:
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analyzing the image to obtain statistical data; deriving background noise removal data for the entire image based on the statistical data; and storing the entire image and the background noise removal data to allow the scanned document to be displayed with background noise removal and without background noise removal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for processing a digital image corresponding to a scanned document, the system comprising:
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statistical analyzer for analyzing the image to obtain statistical data; function derivator for deriving background noise removal data for the image based on the statistical data; and data storage for storing the image and the background noise removal data together to allow the scanned document to be displayed with background noise removal and without background noise removal. - View Dependent Claims (12, 13, 14, 15)
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16. Apparatus comprising a processor for processing a digital image, the processing including:
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analyzing the digital image to obtain statistical data; using the statistical data to derive tonemap data that maps a background of the image, including noise in the background, to a preferred tone; and storing the entire image and the tonemap data to allow the digital image to be displayed with and without the background mapped to the preferred tone.
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Specification