License Plate Segmentation Problem

edit

Hi All, I'm working on ANPR ..gone through the book of mastering opencv with practicals.

For plate detection in the book, it is considered only for plates of Spain based on plate width , height and aspect ratio. how can we get the plate detection to do done irrespective of width and other parameters. can anyone suggest me with solution for my problem or guide with any tutorial or papers . I am now doing find contours on the plate like contours and performing conditions based on aspect ratio, width and height to grab the license plate. Any suggestions greatly appreciated.

Thanks