Holistic Recognition of Low Quality License Plates by CNN using Track Annotated Data

IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS) 2017 · Jakub ˇSpaˇnhel, Jakub Sochor, Roman Jur´anek, Adam Herout, Luk´aˇs Marˇs´ık, Pavel Zemˇc´ık ·

This work is focused on recognition of license plates in low resolution and low quality images. We present a methodology for collection of real world (non-synthetic) dataset of low quality license plate images with ground truth transcriptions. Our approach to the license plate recognition is based on a Convolutional Neural Network which holistically processes the whole image, avoiding segmentation of the license plate characters. Evaluation results on multiple datasets show that our method significantly outperforms other free and commercial solutions to license plate recognition on the low quality data. To enable further research of low quality license plate recognition, we make the datasets publicly available.

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