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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö > Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö B

Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö B

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ¸í¾Ïºñ Çâ»óÀ» À§ÇÑ ¼­ºê-È÷½ºÅä±×·¥ ¸éÀûºñ ±â¹ÝÀÇ ÀûÀÀÇü È÷½ºÅä±×·¥ ÀçºÐ¹è ¾Ë°í¸®Áò
¿µ¹®Á¦¸ñ(English Title) An Adaptive Histogram Redistribution Algorithm Based on Area Ratio of Sub-Histogram for Contrast Enhancement
ÀúÀÚ(Author) ¹Úµ¿¹Î   ÃÖ¸í·Ä   Dong-Min Park   Myung-Ruyl Choi  
¿ø¹®¼ö·Ïó(Citation) VOL 16-B NO. 04 PP. 0263 ~ 0270 (2009. 08)
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(Korean Abstract)
È÷½ºÅä±×·¥ ÆòÈ°È­´Â ÁÖ¾îÁø ÀÔ·Â ¿µ»óÀÇ ´©ÀûºÐÆ÷ÇÔ¼ö CDF (Cumulative Distribution Function)¸¦ ÀÌ¿ëÇÏ¿© ¿µ»óÀÇ µ¿Àû¿µ¿ª (Dynamic Range)À» È®ÀåÇÏ°í È÷½ºÅä±×·¥ÀÇ ºÐÆ÷¸¦ ±ÕµîÇÏ°Ô ÇÔÀ¸·Î½á ¸í¾Ïºñ¸¦ °³¼±ÇÑ´Ù. ±×·¯³ª È÷½ºÅä±×·¥ ÆòÈ°È­´Â ¿µ»óÀÇ ¹à±â¸¦ °úµµÇÏ°Ô º¯ÇÏ°Ô ÇÏ´Â ´ÜÁ¡ÀÌ ÀÖ´Ù. º» ³í¹®¿¡¼­´Â °úµµÇÑ ¸í¾Ïºñ Çâ»óÀ» ¾ïÁ¦ÇϱâÀ§ÇØ ¼­ºê-È÷½ºÅä±×·¥ÀÇ ¸éÀûºñ ±â¹ÝÀÇ È÷½ºÅä±×·¥ ÀçºÐ¹è¸¦ ÀÌ¿ëÇÑ ÀûÀÀÇü ¸í¾Ïºñ Çâ»ó ¾Ë°í¸®Áò. Á¦¾ÈÇÑ ¾Ë°í¸®ÁòÀº ¿µ»óÀÇ µ¿Àû¿µ¿ªÀ» ÀԷ¿µ»óÀÇ ÈÖµµ Æò±Õ°ªÀ» ±â¹ÝÀ¸·Î ºÐÇÒÇÏ°í, ºÐÇÒµÈ ¿µ¿ªÀÇ ¸éÀûºñ¿¡ µû¶ó ¹à±â ºÐÆ÷¸¦ ÀçºÐ¹èÇÔÀ¸·Î½á °úµµÇÑ ¹à±â º¯È­¸¦ È¿°úÀûÀ¸·Î ¾ïÁ¦ ÇÒ ¼ö ÀÖ´Ù. ½ÇÇè°á°ú¸¦ ÅëÇÏ¿© ½Ã°¢ÀûÀ¸·Î »öÀÇ ¿Ö°îÀÌ ¾ø´Â ÀÚ¿¬½º·¯¿î ¿µ»óÀ» È®ÀÎÇÏ¿´°í, Æò±Õ°ªÀÇ ºñ±³¸¦ ÅëÇØ °úµµÇÑ ¹à±â º¯È­¸¦ ¾ïÁ¦ÇÑ °ÍÀ» È®ÀÎ ÇÒ ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ È÷½ºÅä±×·¥ÀÇ ºÐÆ÷¿¡ »ó°ü¾øÀÌ ´ëºÎºÐÀÇ ¿µ»ó¿¡¼­ ¿ì¼öÇÑ °á°ú¸¦ ³ªÅ¸³»´Â °ÍÀ» ½ÇÇè°á°ú¿¡¼­ ¾Ë ¼ö ÀÖ¾ú´Ù.
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(English Abstract)
Histogram Equalization (HE) is a very popular technique for enhancing the contrast of an image. HE stretches the dynamic range of an image using the cumulative distribution function of a given input image, therefore improving its contrast. However, HE has a well-known problem : when HE is applied for the contrast enhancement, there is a significant change in brightness. To resolve this problem, we propose An Adaptive Contrast Enhancement Algorithm using Subhistogram Area-Ratioed Histogram Redistribution, a new method that helps reduce excessive contrast enhancement. This proposed algorithm redistributes the dynamic range of an input image using its mean luminance value and the ratio of sub-histogram area. Experimental results show that by this redistribution, the significant change in brightness is reduced effectively and the output image is able to preserve the naturalness of an original image even if it has a poor histogram distribution.
Å°¿öµå(Keyword) ¸í¾ÏºñÇâ»ó   È÷½ºÅä±×·¥ ÆòÈ°È­   Æò±Õ°ª   Contrast Enhancement   Histogram Equalization   Mean  
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