An Improved Drop-fall Algorithm for Handwritten Numerals Segmentation
After analyzing the weakness of conventional Drop Fall algorithm,which is one of severval contour splitting algorithms,an improved seeping process is presented in this paper for separating connected characters that share a long segment.At first the medial axis of stroke connection between two characters is extracted by distance transform as cut tracing,and then straight line is drawn up or down in the slant angle direction from the two terminal points until the upper or lower contour of the connected part respectively.Finally,the medial axis and the two straight lines form a long tilt path passing through a series of black pixels in connected part.Experimental results show that the improved process can obtain more satisfied segmentation and it is effective.