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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) °î¸é»ó¿¡ ºÎÂøµÈ QR ÄÚµå¿Í Ä®¶ó ÄÚµåÀÇ Àνķü °³¼±
¿µ¹®Á¦¸ñ(English Title) Recognition Performance Improvement of QR and Color Codes Posted on Curved Surfaces
ÀúÀÚ(Author) ±èÁø¼ö   Jin-soo Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 23 NO. 03 PP. 0267 ~ 0275 (2019. 03)
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(Korean Abstract)
ÇöÀç ½º¸¶Æ® ÆùÀÇ ´ëÁßÀûÀÎ º¸±ÞÀ¸·Î QRÄÚµå´Â ´Ù¾çÇÑ ºÎ°¡ ¼­ºñ½º¸¦ °¡´ÉÇÏ°Ô ÇÏ°í ÀÖ´Ù. ±×·¯³ª °î¸é¿¡ ºÎÂøµÈ QRÄÚµå´Â ºÒ±ÕÀÏÇÑ Á¶µµ·Î ÀÎÇØ Àνķü ÀúÇϸ¦ ÃÊ·¡ÇÑ´Ù. ±×·¡¼­ º» ³í¹®¿¡¼­´Â QR ÄÚµå¿Í °°Àº ÀÀ¿ë¿¡ ÀûÇÕÇϵµ·Ï ºí·Ï ÀûÀÀÀû ÀÌÁøÈ­ ¹æ¹ýÀ» µµÀÔÇÏ¿© ÃÖÀûÀÇ ÀÌÁøÈ­ ÀÓ°èÄ¡¸¦ ±¸ÇÏ´Â ¹æ¹ýÀ» µµÀÔÇÑ´Ù. Áï, Å« ºí·Ï¿¡ ´ëÇØ È÷½ºÅä±×·¥À» ±¸ÇÏ¿© ÃʱâÀÇ ÀÓ°èÄ¡¸¦ ±¸ÇÏ°í, ±× ºí·ÏÀ» ºÐÇÒÇÏ¿© È÷½ºÅä±×·¥¿¡ µû¸¥ ºí·ÏÀÇ Æ¯¼ºÀÌ ¹Ý¿µµÈ ¼¼ºÐÈ­µÈ ÀÓ°èÄ¡¸¦ ±¸ÇÏ´Â ¹æ¹ýÀ¸·Î ÀÌÁøÈ­¸¦ ¼öÇàÇÑ´Ù. ¶ÇÇÑ, ¸ðÆú·ÎÁö ¿¬»êÀ» µµÀÔÇÏ¿© QRÄÚµå¿Í °°Àº ÀÌ¿ô È­¼ÒµéÀÇ Æ¯Â¡ÀÌ ¹Ý¿µµÇµµ·Ï ÇÏ´Â ¹æ¹ýÀ¸·Î Àû¿ëµÈ´Ù. ÁÖ¾îÁø Á¤Ç° Ä®¶óÄÚµå¿Í ÀÔ·Â Äڵ带 ´Ù¼öÀÇ ¹æ¹ýÀ¸·Î ºñ±³ÇÏ¿© Á¤Ç°À» ±¸º°ÇÏ´Â ÆǺ° ¹æ¹ýÀ» Á¦¾ÈÇÑ´Ù. ´Ù¾çÇÑ ½ÇÇèÀ» ÅëÇÏ¿© QRÄڵ带 °ËÃâÇÔ¿¡ ÀÖ¾î Á¦¾ÈÇÑ ¹æ¹ýÀº ±âÁ¸ÀÇ ¹æ¹ýº¸´Ù ¿ì¼öÇÑ ¼º´ÉÀ» º¸ÀÓÀ» È®ÀÎÇϸç, ¶ÇÇÑ, ±âÁ¸ÀÇ ¹æ½Ä¿¡ ºñÇØ 40µµ±îÁöÀÇ ³ôÀº °î·ü¿¡¼­µµ ¿ì¼öÇÑ ÀνķüÀ» À¯ÁöÇÔÀ» º¸ÀδÙ.
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(English Abstract)
Currently, due to the widespread use of a smartphone, QR codes allow users to access a variety of added services. However, the QR codes posted on curved surfaces tend to be non-uniformly illuminated and bring about the decline of recognition rate. So, in this paper, the block-adaptive binarization policy is adopted to find an optimal threshold appropriate for bimodal image like QR codes. For a large block, its histogram distribution is found to get an initial threshold and then the block is partitioned to reflect the local characteristics of small blocks. Also, morphological operation is applied to their neighboring boundary at the discontinuous at the QR code junction. This paper proposes an authentication method based on the color code, uniquely painted within QR code. Through a variety of practical experiments, it is shown that the proposed algorithm outperforms the conventional method in detecting QR code and also maintains good recognition rate up to 40 degrees on curved surfaces.
Å°¿öµå(Keyword) QRÄڵ堠 Ä®¶ó Äڵ堠 °î¸é   Àνķü   ¹ÌÀνķü   QR code   Color Code   Curved Surface   Recognition Rate   Unrecognized Rate  
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