Patent ID: 6775409
Filing Date: 2004-08-10
Classification: G06K

Abstract:
A method for locating a code irrespectively of its type in a bidimensional image, comprising:acquiring (10) a bidimensional image formed from a plurality of dots characterized, respectively, by a brightness value; calculating a brightness variation intensity of dots of the bidimensional image with respect to adjacent dots; dividing (20) said bidimensional image into a plurality of image regions, each of said image regions comprising a respective first number of dots (T); for each of said image regions, calculating (21) one first quantity correlated to the calculated brightness variation intensities of dots of the image region; for at least some of said image regions: calculating a brightness variation direction of dots of the bidimensional image with respect to adjacent dots, calculating (22) at least one second quantity (P1, P2) correlated to the calculated brightness variation directions of dots of the image region; wherein said brightness variation intensities, said brightness variation directions, said first quantities and said at least one second quantities are calculated irrespectively of the code type, and determining (35-44) any presence and type of a code in each of said image regions by analysing said first and said second quantities.