Water Reservoir
 
Principle
This system was developed by Umapada Pal. It is a system for touching numeral segmentation. The approach is based on the large space created by the touching of  two digits.  Water reservoir concept is used to utilize this important space for the purpose. This approach can handle several styles of writing and binding shapes, contrary to the traditional methods. The  proposed approach carries out a classification strategy to judge  the presence of touching.  For the classification  feature based on the reservoir size, their location and number etc. are used.

 
 Functioning

The following stage locates the place of the cut, situated in general at the end of the reservoir which can be
 (a) in top (b) in bottom or (c)  in the middle, depending on the cases. A division of the area in three zones allows to make this localization.

 
Experiments
Cutting point Localization

We locate the basic contour of the reservoir according to the three zones ht, hm and hb, then we locate the cutting points by considering some situations: contour extremities, contours discontinuities, or tangency points. We use the distance to the centre of gravity of the reservoir as a measurement for validity score calculation.
 


 
Results

As we can see it in this table, our system has high performances.  The errors come either from the non recognition of more than two cut numerals, or from a bad classification.
 

Demonstration

The figure on the left-hand side shows the possible cut points, and that of the right-hand side, the cutting path.