heurisc algorithm to find the correct peak. After vertical projection

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Hi People,

I am working on developing a ANPR software to recognize license plate numbers using openCV. I have studied the JavaANPR project. YOu can check more on this link

http://javaanpr.sourceforge.net/anpr.pdf

This project uses the vertical and horizontal projection after make the image gray to find out the band where the plate is.

However when using it on my car images sometimes I get more than one "peak" for the vertical projection. I wanted to ask if there's a way to use some heuristics algorithms to find out which "peak" is the correct one.

Can someone help me ? Thank You