Digital image processing method and computer program product
AssigneeEastman Kodak Company
InventorsJames Warnick, Chris W. Honsinger
Life of this patent
Estimating the term…
Abstract
A digital image processing method for detecting when and where an image has been altered or modified includes the steps of generating an edge map of an original digital image; convolving the edge map with a carrier signal to generate a dispersed edge map; and combining the dispersed edge map with the original digital image to create a combined image. The combined digital image is checked to determine if it has been modified by correlating the carrier signal with the combined image to produce a recovered edge map; and comparing the recovered edge map with the original image to detect modifications to the combined image.
Claims14
A digital image processing method, comprising the steps of:
- a) generating an edge map of an original digital image;
- b) convolving the edge map with a carrier signal that disperses the edge map throughout the spatial domain to generate a dispersed edge map;
- and
- c) combining the dispersed edge map with the original digital image to create a combined image.
A computer program product, comprising:
- a computer readable storage medium having a computer program stored thereon for performing the steps of:
- a) generating an edge map of an original digital image;
- b) convolving the edge map with a carrier signal that disperses the edge map throughout the spatial domain to generate a dispersed edge map;
- and
- c) combining the dispersed edge map with the original digital image to create a combined image.
Digital image capture apparatus, comprising:
- a) a digital image sensor for producing a digital image signal;
- and
- b) a digital image processor for processing the digital image signal including,
- i) means for generating an edge map of the digital image;
- ii) means for convolving the edge map with a carrier signal that disperses the edge map throughout the spatial domain to generate a dispersed edge map;
- and
- iii) means for combining the dispersed edge map with the original digital image signal to create a combined digital image signal.
Dependencies are inferred from the claim text.