Effects of Challenging Weather and Illumination on Learning-Based License Plate Detection in Noncontrolled Environments

Table 2

Description of the sets of images used for the experiments.

Name	Purpose	Number of images	Description
GenTrainingSet	Training	5000	Images taken in optimal conditions (without rainfall and with good illumination)
GenTestSet	Test	2000
RainTrainingSet	Training	5000	Images taken under rainfall conditions (heavy rain, fog, or snow)
RainTestSet	Test	2000
NightTrainingSet	Training	5000	Images taken under difficult lighting conditions (lack of light)
NightTestSet	Test	2000