Apparatus for scrambling and unscrambling documents
AssigneeAliroo Ltd.
InventorYitzchak Pomerantz
Life of this patent
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Abstract
Apparatus for scrambling documents including apparatus for providing output signals representing the contents of a document, apparatus for operating on the output signals to produce modified output signals representing a scrambled version of the document including a system of reference marks to be used during later descrambling for registration, scaling, rotation, shifting and defect compensation and writing apparatus receiving the modified output signals and producing a scrambled version of the document.
Claims22
Apparatus for descrambling documents comprising:
- a scrambled document signal source, providing signals that represent the contents of a document, receiving a document to be unscrambled and providing output signals representing the contents of the document;
- an unscrambler for operating on the output signals to produce modified output signals representing an unscrambled version of the document, the unscrambler employing a system of reference marks, positioned interior of the periphery of at least a portion of the content bearing area of the document, to correct distortion;
- and
- an unscrambled document generator receiving said modified output signals and producing a unscrambled version of the document.
Apparatus for descrambling documents comprising:
- a scrambled document signal source, providing signals that represent the contents of a document, receiving a document to be unscrambled and providing output signals representing the contents of the document;
- an unscrambler for operating on the output signals to produce modified output signals representing an unscrambled version of the document, the unscrambler employing a system of reference marks, to correct distortion;
- and
- an unscrambled document generator receiving said modified output signals and producing a unscrambled version of the document,
- the apparatus also comprising a descrambling verifier for verification of correct descrambling,
- and wherein said descrambling verifier comprises an edge correlator for carrying out edge correlation operations on adjacent scrambled pixels.
Apparatus for descrambling documents for use in conjunction with a document receiver and a scrambled document signal source receiving a document to be unscrambled and providing output signals representing the contents of the document, the apparatus comprising:
- an unscrambler operating on the output signals to produce modified output signals representing an unscrambled version of the document, the unscrambler employing a system of reference marks, positioned interior of the periphery of at least a portion of the content bearing area of the document, to correct distortion;
- and to provide the modified output signals to the document generator, for producing an unscrambled version of the document.
A method for descrambling documents comprising the steps of:
- receiving a document to be unscrambled including a content bearing area and a system of reference marks positioned interior of the periphery of at least a portion of the content bearing area of the document and providing output signals representing the contents of the document;
- operating on the output signals to produce modified output signals representing an unscrambled version of the document;
- employing said system of reference marks to correct distortion;
- and
- receiving said modified output signals and producing a corrected unscrambled version of the document.
A method for descrambling documents for use in conjunction with a document receiver and a scrambled document signal source receiving a document to be unscrambled and providing output signals representing the contents of the document, the method comprising the steps of:
- operating on the output signals to produce modified output signals representing an unscrambled version of the document;
- employing a system of reference marks, positioned interior of the periphery of at least a portion of the content bearing area of the document, to correct distortion;
- and
- providing the modified output signals to the document generator, for producing an unscrambled version of the document.
Dependencies are inferred from the claim text.