Patent Document ID: 20140314320
Application ID: 14351142
Patent Status: 0

Claim One:
1. An apparatus for automatically recognizing a QR code, comprising: a photographing unit capturing images of a QR code including recognition points and surroundings of the QR code, and obtaining a surrounding image including the QR code; a QR code recognition unit converting the surrounding image including the QR code obtained by the photographing unit into a grayscale image of a pixel unit, converting the grayscale image into a histogram indicative of a distribution map according to luminosity of each pixel, extracting only pixels having a luminosity value concentration level the same as or higher than a threshold based on the histogram, setting extracted pixels as a candidate pixel group, searching the set candidate pixel for recognition points through a recognition marker, recognizing a region in which the recognition points are places as a QR code if the recognition points are conceived in the candidate pixel group, and reading out information stored in the recognized QR code; a display unit for displaying an image of the recognized QR code or displaying the read-out information in the QR code; and a memory unit for matching the image of the recognized QR code with the read-out information in the QR code and storing the matched image and the read-out information, wherein, if three recognition points are not recognized in the candidate pixel group through the recognition marker and thus a QR code is not recognized, the QR code recognition unit enlarges the surrounding image including the QR code obtained through the photographing unit in a vector way, corrects the enlarged surrounding image, converts the enlarged and corrected surrounding image including the QR code into a grayscale image of a pixel unit, converts the grayscale image into a histogram representing a distribution map according to luminosity of each pixel, extracts only pixels each having a luminosity value concentration level the same as or higher than a threshold based on the histogram, sets the extracted pixels as a candidate pixel group, searches the set candidate pixel group for three recognition points through the recognition marker, and, if the three recognition points are conceived, recognizes a region in which the three recognition points are placed as a QR code.