Processor and method for processing image to update information embedded unreadably in a printed document
AssigneeOki Data Corporation
InventorKurato Maeno
Life of this patent
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Abstract
In a watermark processing system, a watermark detector detects first information represented by a watermark from an image, a watermark encoder decodes and error-corrects the first information and re-encodes it to second information, and a watermark eraser identifies the position of the tint-block pattern included in the watermark according to the second information and produces a watermark-erased image from which the watermark is erased.
Claims18
An image processor for processing an image having information embedded therein and using a fine tint-block pattern as a watermark, comprising:
- a watermark detector that detects first information represented by the watermark from the image;
- an encoder that decodes and error-corrects the first information and re-encodes the first information into second information;
- and
- a watermark eraser that identifies a position of the tint-block pattern included in the watermark according to the second information and produces a watermark-erased image from which the watermark is erased.
A method for processing an image having information embedded therein and using a fine tint-block pattern as a watermark, comprising the steps of:
- detecting first information represented by the watermark from the image;
- decoding and error-correcting the first information and re-encoding the first information into second information;
- and
- identifying a position of the tint-block pattern included in the watermark according to the second information and producing a watermark-erased image from which the watermark is erased.
A computer program on a non-transitory medium that is readable by a computer and allows the computer to function as an image processor for processing an image having information embedded therein and using a fine tint-block pattern as a watermark, said processor comprising:
- a watermark detector that detects first information represented by the watermark from the image;
- an encoder that decodes and error-corrects the first information and re-encodes the first information into second information;
- and
- a watermark eraser that identifies a position of the tint-block pattern included in the watermark according to the second information and produces a watermark-erased image from which the watermark is erased.
Dependencies are inferred from the claim text.