N
Detect from left to right
Image segmentation
Whether the pixelprojection value of the i+lstarea is 0?
This pixel is set to the leftborder of the ith region
This pixel is set to theright border of the ithregion
Whether the pixelprojection value of the itharea is 0?
This pixel is set to the leftboundary of the i+lstregion
Y
This pixel is set to theright boundary of theit lst region
End
