Word Slant Estimation Using Non-horizontal Character Parts and Core-Region Information

In this paper, we propose a new technique for estimating the word slant that is based on analyzing the non-horizontal parts of the characters. We calculate the orientation, the height of the bounding box that includes all non-horizontal parts as well as their location related to the word. We estimate the non-horizontal parts orientation weighted according to the height of the corresponding bounding box. An additional weight is applied if the fragment is outside of the core-region of the word, which indicates that this fragment is probably one of the strokes that should be, by definition, vertical to text orientation. Extensive experimental results prove the efficiency of the proposed method.