Proposal of the hybrid spectral gradient method to extract character / text regions from general scene images. - Yoichiro Baba; Akira Hirose 001 (ICIP, 2004)

Spectral Fluctuation Method: A Texture-Based Method to Extract Text Regions in General Scene Images. - Yoichiro Baba; Akira Hirose 001 (IEICE Trans. Inf. Syst., 2009)