Methods, Systems and Apparatus for Determining Orientation in a Document Image

A non-transitory computer-readable medium encoded with a computer program code for implementing a method for determining a line orientation in a document image, said method comprising:

• receiving, in a processor, a text mask associated with a document image;
• generating a text-blob image from said text mask;
• accumulating pixel-wise horizontal differences in said text-blob image;
• accumulating pixel-wise vertical differences in said text-blob image;
• and
• selecting a line orientation based on a comparison of said accumulated pixel-wise horizontal differences and said accumulated pixel-wise vertical differences.

A system for determining a line orientation in a document image, said system comprising:

• a text-mask receiver for receiving a text mask associated with a document image;
• a text-blob generator for generating a text-blob image from said text mask;
• an accumulator for accumulating pixel-wise horizontal differences in said text-blob image and for accumulating pixel-wise vertical differences in said text-blob image;
• a comparator for comparing said accumulated pixel-wise horizontal differences and said accumulated pixel-wise vertical differences;
• and
• an orientation selector for selecting a line orientation based on said comparison of said accumulated pixel-wise horizontal differences and said accumulated pixel-wise vertical differences.

A method for determining a page orientation in a document image, said method comprising:

• receiving, in a processor, a text mask associated with a document image;
• generating a text-blob image from said text mask;
• accumulating pixel-wise horizontal differences in said text-blob image;
• accumulating pixel-wise vertical differences in said text-blob image;
• selecting a line orientation based on a comparison of said accumulated pixel-wise horizontal differences and said accumulated pixel-wise vertical differences;
• receiving a document language information;
• and
• selecting a page orientation based on said line orientation and said document language information.