Detection of Vehicle’s Number Plate at Nighttime using Iterative Threshold Segmentation (ITS) Algorithm

An Iterative method of ind ividual nameplate detection using color images acquired fro m a high position is proposed for guidance of nighttime vehicles and other similar purposes. Segmentation is a very critical and d ifficult stage to accomplish in co mputer aided detection systems. Fundamentally the method contains iterative automatic thresholding and selecting the best threshold value which is applied to the original or enhanced dark night images. The main focus of the iteration based threshold to distinguish the image of the background and foreground. This method was tested on an actual outdoor vehicle images and results obtained fro m automat ic thresholding of the experimental images are showing the validity of the method.