Digital image processing method and computer program product
First Claim
Patent Images
1. 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.
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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.
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Citations
14 Claims
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1. A digital image processing method, comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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. - View Dependent Claims (12)
- a computer readable storage medium having a computer program stored thereon for performing the steps of;
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13. Digital image capture apparatus, comprising:
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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. - View Dependent Claims (14)
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Specification