Autofocus method using similarity measure based on inter-color channel correlation. - Kwanghyun Koh; Bora Jin; Wonkyo Seo; Nam Ik Cho (ISPACS, 2011)

Autofocus method using dual aperture and color filters. - Kwanghyun Koh; Jung Gap Kuk; Bora Jin; Wooseok Choi; Nam Ik Cho (J. Electronic Imaging, 2011)