Recognition of Composite Elements in Bar Graphs. - Naoko Yokokura; Toyohide Watanabe (MVA, 1996)

Layout-Based Approach for Extracting Constructive Elements of Bar-Charts. - Naoko Yokokura; Toyohide Watanabe (GREC, 1997)

Recognition of Various Bar-graph Structures Based on Layout Model. - Naoko Yokokura; Toyohide Watanabe (ACCV (2), 1998)