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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸°úÇÐȸ ³í¹®Áö > Á¤º¸°úÇÐȸ ³í¹®Áö B : ¼ÒÇÁÆ®¿þ¾î ¹× ÀÀ¿ë

Á¤º¸°úÇÐȸ ³í¹®Áö B : ¼ÒÇÁÆ®¿þ¾î ¹× ÀÀ¿ë

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) 2Â÷¿ø ¿þÀ̺귿 ÆÐŶ¿¡ ±â¹ÝÇÑ Çʱâü ¹®ÀÚÀνÄÀÇ Æ¯Â¡¼±Åùæ¹ý
¿µ¹®Á¦¸ñ(English Title) A Feature Selection for the Recognition of Handwritten Characters based on Two-Dimensional Wavelet Packet
ÀúÀÚ(Author) ±è¹Î¼ö   ¹éÀå¼±   ÀÌ±Í»ó   ±è¼öÇü  
¿ø¹®¼ö·Ïó(Citation) VOL 29 NO. 08 PP. 0521 ~ 0528 (2002. 08)
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(Korean Abstract)
º» ³í¹®¿¡¼­´Â ¹®ÀÚÀνÄÀǠƯ¡¼±Åùæ¹ýÀ¸·Î 2Â÷¿ø ¿þÀ̺귿 ÆÐŶÀ» ÀÌ¿ëÇϴ »õ·Î¿î ¹æ¹ýÀ» Á¦¾ÈÇÑ´Ù. ¿µ»óÀÚ·áÀǠƯ¡µé·ÎºÎÅÍ Áß½ÉƯ¡À» ¼±ÅÃÇϱâÀ§ÇÑ Â÷¿øÃà¼Ò ±â¹ýÀ¸·Î ÁÖ¼ººÐºÐ¼® ±â¹ýÀÌ ÁַΠ»ç¿ëµÈ´Ù. ÇÏÁö¸¸, ÁÖ¼ººÐºÐ¼® ±â¹ýÀº °íÀ¯½Ã½ºÅÛ¿¡ ÀÇÁ¸Çϱ⠶§¹®¿¡, ÀÌ»óÄ¡³ª ÀâÀ½µî¿¡ ¹Î°¨ÇÒ »Ó¸¸ ¾Æ´Ï¶ó, Àü¿ªÀû Æ¯Â¡¸¸À» ¼±ÅàÇϴ °æÇâÀÌ ÀÖ´Ù. ¶§¶§·Î, ¿µ»óÀÚ·áÀÇ Áß¿äÇѠƯ¡ÀÌ °¡ÀåÀÚ¸® ºÎºÐÀ̳ª »ÏÁ·ÇÑ ºÎºÐ °°Àº Áö¿ªÀû Á¤º¸ÀÏ ¼ö ÀÖ´Ù. ÀÌ·¯ÇÑ °æ¿ì, ÁÖ¼ººÐºÐ¼® ±â¹ýÀº ÁÁÀº °á°ú¸¦ ÁÙ ¼ö ¾ø´Ù. ¶ÇÇÑ °íÀ¯½Ã½ºÅÛÀº ¸¹Àº °è»ê½Ã°£À» ¿ä±¸ÇÑ´Ù. 

º» ³í¹®¿¡¼­ ¿ø ÀÚ·á´Â 2Â÷¿ø ¿þÀ̺귿 ÆÐŶ±âÀú¿¡ ÀÇÇØ º¯È¯µÇ°í, ÃÖÀû ÆǺ° ±âÀú°¡ Å½»öµÈ ÈÄ, ±×°ÍÀ¸·ÎºÎÅÍ ÀûÀýÇѠƯ¡ÀÌ ¼±ÅõȴÙ. ÁÖ¼ººÐºÐ¼® ±â¹ý°ú ºñ±³ÇÏ¿©, Á¦¾ÈµÈ ¹æ¹ýÀº ¿þÀ̺귿ÀÇ ÁÁÀº Æ¯¼º¿¡ ÀÇÇØ Àü¿ªÀû Æ¯Â¡»Ó¸¸ ¾Æ´Ï¶ó Áö¿ªÀû Æ¯Â¡ÀÇ ¼±ÅÃÀÌ ºü¸¥ °è»ê½Ã°£À¸·Î ÀÌ·ç¾îÁø´Ù.

Á¦¾ÈµÈ ¹æ¹ýÀÇ ¼º´ÉÀ» º¸À̱â À§ÇØ PCA¿Í Á¦¾ÈµÈ ¹æ¹ýÀÇ ÀνķüÀÇ ½ÇÇè°á°ú°¡ ºÐ¼®µÇ¾ú´Ù.

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(English Abstract)
We propose a new approach to the feature selection for the classification of handwritten characters using two-dimensional(2D) wavelet packet bases. To extract key features of an image data, for the dimension reduction Principal Component Analysis(PCA) has been most frequently used. However PCA relies on the eigenvalue system, it is not only sensitive to outliers and perturbations, but has a tendency to select only global features. Since the important features for the image data are often characterized by local information such as edges and spikes, PCA does not provide good solutions to such problems. Also solving an eigenvalue system usually requires high cost in its computation. In this paper, the original data is transformed with 2D wavelet packet bases and the best discriminant basis is searched, from which relevant features are selected. In contrast to PCA solutions, the fast selection of detailed features as well as global features is possible by virtue of the good properties of wavelets. Experiment results on the recognition rates of PCA and our approach are compared to show the performance of the proposed method.
Å°¿öµå(Keyword) ¹®ÀÚÀνĠ  Ư¡¼±Åà  ÁÖ¼ººÐºÐ¼®   ¿þÀ̺귿   Character Recognition   Feature Selection   Principal Component Analysis   Wavelets  
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