Abstract-- License Plate Recognition (LPR) is a key technology
for many applications. But, most methods in the literature for
LPR are only suitable for stable illumination environment. In
this paper, we present an algorithm for both license plate
localization and recognition in day time and night time. The first
step of the proposed method is to enhance the image using high
dynamic range (HDR). The tile correction and an adaptive
segmentation based on image quality are applied to obtain
upright characters. Finally, the combination of three well-known
classifiers is used to achieve character recognition.