Misestimation of gap fraction values by binarization algorithms. Jonas Glatthorn Philip Beckschäfer 10.1371/journal.pone.0111924.g005 https://plos.figshare.com/articles/figure/_Misestimation_of_gap_fraction_values_by_binarization_algorithms_/1250230 <p>For each algorithm, misestimation was quantified per photograph by dividing the estimated gap fraction of the algorithm () by the gap fraction estimated from manually classified reference pixels (). Misestimations are displayed for histogram- and auto-exposed photographs. The horizontal line indicates the best possible classification.</p> 2014-11-24 02:45:25 gap fraction values pixel Binarization Algorithms Hemispherical photography minimum gap fraction accuracy binarization algorithm threshold selection method