Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Chih-Fong Tsai and Chihli Hung,Automatically Annotating Images with Keywords: A Review of Image Annotation Systems,Recent Patents on Computer Science,1874-4796,Bentham Science Publishers Ltd.,2010-01-09,1,1,55-68,https://cir.nii.ac.jp/crid/1363951794346258688,https://doi.org/10.2174/1874479610801010055