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US 12,015,753 B1Granted
Correlation mark destroyed on copy
AssigneeXerox Corporation
InventorEdward N. Chapman
Life of this patent
Estimating the term…
Abstract
A security apparatus and a method for rendering a security mark can involve creating a security mark that includes a correlation mark having a correlation effect and comprising black pixels and white pixels, and subjecting the security mark to a filter that can removes at least some of the black pixels or the white pixels so that the correlation effect no longer functions and the security mark is not visible when rendered on a recording medium.
Claims20
A method for rendering a security mark, comprising:
- creating a security mark comprising a correlation mark having a correlation effect and comprising black pixels and white pixels;
- creating a swatch for the correlation mark beginning with a thin solid line when painting vectors and a decrease in a grey level in the correlation mark, which lowers an amount of available black pixels;
- and
- subjecting the security mark to a filter that removes at least some of the black pixels or the white pixels so that the correlation effect no longer functions and the security mark is not visible when rendered on a recording medium.
1 more element
A security apparatus, comprising:
- a security mark comprising a correlation mark having a correlation effect and comprising black pixels and white pixels;
- a swatch for the correlation mark beginning with a thin solid line when painting vectors and a decrease in a grey level in the correlation mark, which lowers an amount of available black pixels;
- and
- a filter that removes at least some of the black pixels or the white pixels from the security mark so that the correlation effect no longer functions and the security mark is not visible when rendered on a recording medium.
1 more element
A system for rendering a security mark, comprising:
- at least one processor and a memory, the memory storing instructions to cause the at least one processor to perform:
- creating a security mark comprising a correlation mark having a correlation effect and comprising black pixels and white pixels;
- creating a swatch for the correlation mark beginning with a thin solid line when painting vectors and a decrease in a grey level in the correlation mark, which lowers an amount of available black pixels;
- and
- subjecting the security mark to a filter that removes at least some of the black pixels or the white pixels so that the correlation effect no longer functions and the security mark is not visible when rendered on a recording medium.
2 more elements
Dependencies are inferred from the claim text.