Optical character recognition technique for protected viewing of digital files
AssigneeKurzweil Educational Systems, Inc.
InventorMark S. Dionne
Life of this patent
Estimating the term…
Abstract
Unlocking digital content embodied in digital readable form on a digital media carrier includes receiving a scanned image of a page from scanning a physical copy of content, evaluating the scanned image; and if the scanned image corresponds to a selected page of the digital content, unlocking the digital content.
Claims34
A method for unlocking, locked, first digital content embodied in digital readable form on a digital media carrier and associated with a printed publication, the method comprises:
- producing by a computing system a test that includes a page number of a randomly selected page of the printed publication for a user to scan;
- scanning a page with a scanner to provide to the computer system a scanned page;
- receiving by the computing system from a computing device a file that is an answer to the test, and which file includes second digital content;
- applying by the computing system optical character recognition (OCR) to the second digital content to produce a representation of the second digital content;
- comparing by the computing system, the produced representation of the second digital content to a stored version of the locked, first digital content, which stored version is related to a pre-established degree of gradation of optical character recognition to produce a comparison result;
- determining whether the comparison result corresponds to the stored version;
- and
- decrypting by the computing system the locked, first digital content embodied on the digital media carrier, when the comparison result is that the comparison result corresponds to the stored version to provide user access to the locked, first digital content.
A non-transitory computer readable medium that tangibly stores executable computer instructions, for unlocking locked, first digital content embodied on a digital media carrier, the computer instructions for causing a machine to:
- produce a test that includes a page number of a randomly selected page of a printed publication to scan;
- receive second digital content from a user scanning a page with a scanner to provide to the computer system a scanned page;
- evaluate the received second digital content with respect to a stored version of a representation of the randomly selected page of the printed publication;
- and
- decrypt by the machine the locked, first digital content embodied on the media carrier, to unlock the locked, first digital content when the evaluated, received second digital content corresponds to the stored version of the randomly selected page of the printed publication to provide user access to the locked, first digital content.
An apparatus comprising:
- a computing processing device, including a processor device and memory coupled to the processor device;
- and
- a computer readable storage device storing a computer program product for unlocking locked, first digital content embodied in digital readable form on a digital media carrier, the computer program product comprises instructions for causing the processor device to:
- produce a test that includes a page number of a randomly selected page of the printed publication to scan;
- receive second digital content from a user scanning a page with a scanner to provide to the computer system a scanned page;
- evaluate the received second digital content with respect to a stored representation of the locked, first digital content that corresponds to the randomly selected page of the printed publication;
- and
- decrypt by the computing processing device the locked, first digital content embodied in digital readable form on the digital media carrier when the received second digital content corresponds to the stored representation of the locked, first digital content to provide user access to the locked, first digital content.
Dependencies are inferred from the claim text.