A Database of On-Line Handwritten Mixed Objects Named "Kondate"

This paper describes a database of on-line handwritten patterns mixed of text, figures, tables, maps, diagrams and so on. Now, pen-based and touch-based interfaces are spreading into people and their surfaces are getting large. People can write and draw mixed objects without paying attention on the difference of objects or the mode change. Moreover, they may write text in any direction in combination with non-text objects on large surfaces. This is clearly one of the largest advantages of pen or touch interfaces but poses a challenging problem of object classification and recognition. The proposed database is made and now being enlarged to study such subjects more extensively. So far, 100 Japanese writers, approximately 25 English and 45 Thai writers have participated. The database stores on-line handwritten (digital ink) patterns with ground-truth tags in InkML.