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박선재,Masaaki NISHIKAWA 한국곤충학회 2010 Entomological Research Vol.40 No.2
A genus and species Prionochaeta sibirica Reitter is identified for the first time in Korea. A habitus photo, redescription, and illustrations of diagnostic characters of the species are provided.
Sign Summation Image and Its Application to Robust Image Registration
Atsushi UEMURA,Masaaki FUJIYOSHI,Kiyoshi NISHIKAWA,Hitoshi KIYA 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper proposes sign summation (SS) images for robust image registration against noises. An SS image is generated as the summation of the signs of the differences between the focused pixel and some of its neighboring ones. For image registration in subpixel accuracy, phase-only correlation or cross-correlation is applied to SS images rather than nonprocessed images. Experimental rusults show that SS imaging improves estimation accuracy, whereas median filter, a well-known impulse noise suppression filter, degrades the accuracy.