Song, Chull Hwan, Seong Joon Yoo, Chee Sun Won, and Hyoung Gon Kim. “SVM Based Indoor Mixed Outdoor Classification for Digital Photo Annotation in a Ubiquitous Computing Environment”. Computing and Informatics 27, no. 5 (January 26, 2012): 757–767. Accessed April 30, 2025. https://www.cai.sk/ojs/index.php/cai/article/view/214.