Method of detecting changes occurring in image editing using watermarks
First Claim
1. A method of editing a digital image having embedded data associated therewith, comprising:
- embedding a first watermark in the original image according to a first watermarking scheme which associates first watermark information with each pixel in the original image;
editing the embedded image;
extracting the first watermark information from the edited embedded image to determine which pixels of the original image were edited;
regenerating the embedded data for those portions of the original image that were edited; and
associating the regenerating embedded data with those portions of the original image that were edited.
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Accused Products
Abstract
A method of editing a digital image having associated embedded data, such as printing hints, includes embedding a first watermark in the original image before the image is edited. The first watermarking scheme associates first watermark information with each pixel and is used to detect which pixels have been edited. A second watermark may be embedded in the original image according to a second watermarking scheme which associates second watermark information with non-overlapping groups of pixels in the original image. The second watermark information may be used to synchronize the first watermark information and to detect editing information which does not change pixel values. After editing, only those edited portions of the image need have their embedded data reapplied.
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Citations
21 Claims
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1. A method of editing a digital image having embedded data associated therewith, comprising:
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embedding a first watermark in the original image according to a first watermarking scheme which associates first watermark information with each pixel in the original image;
editing the embedded image;
extracting the first watermark information from the edited embedded image to determine which pixels of the original image were edited;
regenerating the embedded data for those portions of the original image that were edited; and
associating the regenerating embedded data with those portions of the original image that were edited. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 21)
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12. The method of claim 12, wherein the bit comprises the least significant bit of each pixel'"'"'s color.
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19. A method of editing a digital image having embedded data associated therewith, comprising:
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embedding a first watermark in the original image according to a first watermarking scheme which associates first watermark information with each pixel in the original image;
embedding a second watermark in the original image according to a second watermarking scheme which associates second watermark information with each non-overlapping group of pixels in the original image;
editing the embedded image;
extracting the first watermark information from the edited embedded image to determine which pixels of the original image were edited;
extracting the second watermark information from the edited image to determine which blocks of pixels were moved or cropped;
using the extracted second watermark information to determine which blocks of pixels were edited;
using the extracted first watermark information to synchronize the second watermark information; and
associating the embedded data with those portions of the original image that were edited, moved or cropped. - View Dependent Claims (20)
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Specification