METHOD TO ENSURE CORRECT ALIGNMENT OF DOCUMENTS IN AUTOMATIC PRINTING Russian patent published in 2012 - IPC G06K9/36 H04N1/00 

FIELD: printing industry.

SUBSTANCE: method for correct alignment of images containing texts in Roman or Slavic languages, in case of automatic printing includes highlighting of text blocks; checking whether the number of text blocks N is less than the specified threshold T; if the number of text blocks N is less than the specified threshold T, detection of document alignment is not carried out; if the number of text blocks N is higher than the specified threshold T, non-text areas are filled with white; an RGB image is converted into a binary one; parameters of text asymmetry asym0, asym90 are calculated; as well as horizontal - ah, and vertical - av coefficients; depending on the calculated values, it is decided that a document has proper alignment for a text in Roman languages, for a text in Slavic languages the image is turned by 180 degrees; that a document has proper alignment for a text in Slavic languages, for a text in Roman languages the image is turned by 180 degrees; the image is turned by 90 or 270 degrees.

EFFECT: higher correctness of alignment of a page containing text in Roman or Slavic languages, also if colour images are available, provision of the possibility to correct possible errors of alignment.

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