A new effective method of image enhancement for license plate location
As a result of population growth and changes in the way of people’s travel, ITS (intelligent transportation system) technologies have been the key research issue to solve the traffic congestion, and license plate location is an essential important stage in vehicle license plate recognition for ITS. Researchers have found many diverse methods for license plate location. However, it is difficult to precisely locate the license plate under certain lighting conditions. It is necessary to enhance low contrast images before plate location, and the edge details of an image captured at different lighting conditions using an industrial camera will always be obscured when the image is under-exposed or over-exposed.