Baseline detection based on local connection and evaluation for Tibetan historical document text line

The baseline position is an important reference information of the text line in the document written by Uchen Script. In order to overcome the distortion of text line and obtain accurate baseline position, this paper proposes a baseline detection method based on lines connection local and global evaluation. First, the slanted document image is corrected and the number of text lines is determined by projection. Then the discrete lines are connected locally; Finally, the baseline of text lines is obtained by evaluating the combination of baselines. Experimental results show that the proposed method can effectively overcome document skew and text line distortion, and the baseline position detected is accurate.