Measure fish length from digital image using Hsiu's method / by Norhaida Abdullah, author, Mohd. Shafry Mohd. Rahim, author, Ismail Mat Amin, author, Mohd. Zaidi Zakaria, author, Mustafa Man, 1975-, author, Environmental Science and Technology Conference (ESTEC2009) (2009 : Kuala Terengganu)