AUTHENTICATION OF NORMAN ROCKWELL PAINTINGS
First Claim
1. A process for authenticating an image, comprising:
- providing a digital photograph of the image;
converting the digital photograph to a CMYK color model;
adjusting saturation of the CMYK color model of the digital photograph to 60% of complete saturation;
adjusting the hue of the CMYK model of the digital photograph to 57 degrees on a red-zeroed color wheel;
converting the saturation-adjusted and hue-adjusted CMYK model of the digital photograph to an HSV color model of the digital photograph;
in the HSV color model of the digital photograph shifting input color components having a hue of between about 46 degrees and about 66 degrees on the red-zeroed color wheel to a hue of between about 281 degrees and about 315 degrees on the red-zeroed color wheel;
posterizing the hue-adjusted HSV model of the digital photograph to include three colors; and
determining whether the hue-adjusted HSV model of the digital photograph contains one or more steganographic symbols.
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Accused Products
Abstract
A process for authenticating a painting includes determining whether a posterized HSV model of a digital photograph contains one or more steganographic symbols. A process for preparing a painting for authentication, includes providing a digital photograph of the painting in the RGB color model, converting the digital photograph to a CMYK color model, converting the CMYK model of the digital photograph to an HSV color model of the digital photograph and posterizing the HSV model of the digital photograph. A system for preparing a painting for authentication includes a processor and a computer-readable memory component containing a digital photograph of the painting in the RGB color model. The processor is configured to convert the digital photograph to a CMYK color model, convert the CMYK model of the digital photograph to an HSV color model of the digital photograph and posterize the HSV model of the digital photograph.
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11 Claims
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1. A process for authenticating an image, comprising:
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providing a digital photograph of the image; converting the digital photograph to a CMYK color model; adjusting saturation of the CMYK color model of the digital photograph to 60% of complete saturation; adjusting the hue of the CMYK model of the digital photograph to 57 degrees on a red-zeroed color wheel; converting the saturation-adjusted and hue-adjusted CMYK model of the digital photograph to an HSV color model of the digital photograph; in the HSV color model of the digital photograph shifting input color components having a hue of between about 46 degrees and about 66 degrees on the red-zeroed color wheel to a hue of between about 281 degrees and about 315 degrees on the red-zeroed color wheel; posterizing the hue-adjusted HSV model of the digital photograph to include three colors; and determining whether the hue-adjusted HSV model of the digital photograph contains one or more steganographic symbols. - View Dependent Claims (2, 3, 4, 5)
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6. A process for preparing an image for authentication, comprising:
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providing a digital photograph of the image in the RGB color model; converting the digital photograph to a CMYK color model; adjusting saturation level of the CMYK color model of the digital photograph to 60% of complete saturation; adjusting hue of the CMYK model of the digital photograph to 57 degrees on a red-zeroed color wheel; converting the saturation-adjusted and hue-adjusted CMYK model of the digital photograph to an HSV color model of the digital photograph; in the HSV color model of the digital photograph shifting input color components having a hue of between about 46 degrees and about 66 degrees on the red-zeroed color wheel to a hue of between about 281 degrees and about 315 degrees on the red-zeroed color wheel; and posterizing the hue-adjusted HSV model of the digital photograph to include two or three colors. - View Dependent Claims (7, 8)
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9. A process to authenticate Norman Rockwell paintings, comprising:
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providing a large format digital photograph of a painting or a large format digital photograph of a photograph of a painting; converting the digital photograph to a CMYK color model; adjusting global saturation level to 60% of complete saturation and cyans hue level for the CMYK color model to maximize cyan components by offsetting 57 degrees on a red-zeroed color wheel; converting the CMYK color model to HSV color model; adjusting hue level of the HSV color model to maximize magenta components by shifting input color components having a hue of between about 46 degrees and about 66 degrees on the red-zeroed color wheel to a hue of between about 281 degrees and about 315 degrees on the red-zeroed color wheel; and posterizing the cyan- and magenta-maximized HSV Color Model to include three colors. - View Dependent Claims (10, 11)
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Specification