Textline detection in degraded historical document images

EURASIP Journal on Image and Video Processing

Table 1 Textline detection methods for handwritten documents

Category	Advantages	Disadvantages
Projection-profile [2, 28]	Simplicity and efficiency	Difficulties in handling skewed and/or curved textlines
Hough-transform [15, 17]	Availability to skewed textlines	Limitations in handling curved textlines
Partial projection [1, 32]	Availability to skewed and/or curved textlines	Limitations in handling overlapping components
Path-finding [3, 26]	Robustness to writing styles	Difficulties in handling touching lines
Bottom-up grouping [31]	Robustness to document geometry	Errors in splitting and merging lines
Energy minimization [10, 25]	High performance	High computational cost