Systems and methods for mobile image capture and processing

A system, comprising a processor and logic executable by the processor to cause the processor to perform operations comprising:

• capturing image data depicting a digital representation of a document;
• defining a plurality of candidate edge points within the image data, wherein defining the plurality of candidate edge points comprises adjusting for illumination drift inherent to the image based at least in part on calculating statistics descriptive of background for each of a plurality of distinct portions of the image;
• and
• defining four sides of a tetragon based on at least some of the plurality of candidate edge points;
• wherein each side of the tetragon corresponds to a different side of the document;
• wherein an area of the tetragon comprises at least a threshold percentage of a total area of the digital image;
• and
• wherein the tetragon bounds the digital representation of the document.

A computer-implemented method, comprising:

• capturing image data depicting a digital representation of a document;
• defining a plurality of candidate edge points within the image data;
• and
• defining four sides of a tetragon based on at least some of the plurality of candidate edge points, wherein defining the plurality of candidate edge points comprises adjusting for illumination drift inherent to the image based at least in part on calculating statistics descriptive of background for each of a plurality of distinct portions of the image;
• wherein each side of the tetragon corresponds to a different side of the document;
• wherein an area of the tetragon comprises at least a threshold percentage of a total area of the digital image;
• and
• wherein the tetragon bounds the digital representation of the document.