Methods and systems for detecting infrared security marks embedded in a document

A computer system for detecting a mark embedded in a document, the computer system comprising:

• a hardware processor;
• a non-volatile storage medium storing instructions that when executed by the hardware processor perform operations comprising:
• receiving the document comprising a region of interest (ROI), wherein the ROI corresponds to a ROI location in the document;
• generating an array of counters corresponding to the ROI;
• identifying, based on the array of counters, a transition point corresponding to the ROI including the mark;
• identifying, using the transition point, coordinates of the mark;
• calculating a size of the mark based on the coordinates;
• comparing the calculated size with a pre-defined size;
• and
• based on the comparison, detecting the mark in the document.

A computer program product for detecting a mark embedded in a document, the computer program product comprising a computer-readable storage medium having program instructions embodied therewith, the program instructions executable by a computing device to cause the computing device to perform operations comprising:

• receiving the document comprising a region of interest (ROI), wherein the ROI corresponds to a location in the document;
• generating an array of counters corresponding to the ROI;
• identifying, based on the array of counters, a transition point corresponding to the ROI including the mark;
• calculating, using the transition point, a size of the mark;
• comparing the calculated size with a pre-defined size;
• and
• based on the comparison, detecting the mark in the document.