Abstract: Systems and methods consistent with embodiments of the present invention provide for a method for preserving and maintaining document integrity. In some methods for preserving and maintaining document integrity, the contents of a document, or contents of a document layer may be encoded into a machine-readable form. In some embodiments, the encoded information may be represented using a 2-dimensional bar code. In some methods for preserving and maintaining document integrity, the machine-readable code is printed along with contents of the document based on space available in the document. In some embodiments, a printed document containing the machine-readable code may be scanned and digitized, and content extracted from the scanned data. In some embodiments, the machine-readable code printed on the document is used to recreate layer data from the printed document.

Abstract: Systems and methods consistent with embodiments of the present invention provide for a method for preserving and maintaining document integrity. In some methods for preserving and maintaining document integrity, the contents of a document, or contents of a document layer may be encoded into a machine-readable form. In some embodiments, the encoded information may be represented using a 2-dimensional bar code. In some methods for preserving and maintaining document integrity, the machine-readable code is printed along with contents of the document based on space available in the document. In some embodiments, a printed document containing the machine-readable code may be scanned and digitized, and content extracted from the scanned data. In some embodiments, the machine-readable code printed on the document is used to recreate layer data from the printed document.

Abstract: Systems and methods consistent with embodiments of the present invention provide for a method for preserving and maintaining document integrity. In some methods for preserving and maintaining document integrity, the contents of a document, or contents of a document layer may be encoded into a machine-readable form. In some embodiments, the encoded information may be represented using a 2-dimensional bar code. In some methods for preserving and maintaining document integrity, the machine-readable code is printed along with contents of the document based on space available in the document. In some embodiments, a printed document containing the machine-readable code may be scanned and digitized, and content extracted from the scanned data. In some embodiments, the machine-readable code printed on the document is used to recreate layer data from the printed document.

Abstract: A two-dimensional color barcode using gradations of color is disclosed. The barcode includes a black and white configuration block that encodes configuration information about the barcode and a plurality of color data blocks that encodes data. Each tile in the data blocks has one of the-predefined recoverable gradation values of the RGB, CMY or other color sets. The number of recoverable gradation values for each color used in the color data block is specified in the configuration block. The barcode also includes a corner marker consist of a column and a row of black abutting the configuration block which is located in the top left corner, three additional corner markers and a plurality of block separators along the sides of barcode. Also described are methods for generating and decoding such a 2d color barcode. The methods include transforming data values to be encoded into the color space and vise versa.