Android version-license plate recognition technology Introduction

Modern life is increasingly inseparable from transport, especially road vehicles have become the standard of urban life. Cars in the convenience of people to travel at the same time also increased the difficulty of vehicle control, for example, vehicle management, vehicle inquiries, vehicle charges and other cross-pipe departments. There is a big contradiction between the increasing volume of cars and the number of workers who are constantly compressing. In order to strain this piece of electronic police services, mobile police, site survey and other activities, so that the workload of the staff to reduce.

Once the license plate information acquisition link, the need for traditional manual input way in the face of a large number of the weak, now if you can directly through the Mobile camera acquisition license plate information and complete input will save staff and customer time.

The license plate recognition technology of Android refers to the technology of extracting license plate identity from vehicle image by means of computer vision and image processing pattern recognition. The Android license plate recognition technology can be divided into three parts, such as license plate location, character segmentation and character recognition. License plate area in the whole image of the proportion is very small, license plate location, size, color is also uncertain, and positioning algorithm to be able to overcome the effects of different lighting and complex background, but also to take into account the accuracy and real-time, so quickly locate the license plate is more difficult and inaccurate.

Now the mature mobile license plate recognition product recognition rate in the daytime can reach more than 98%, night more than 95%; recognition speed in 1s/2s, integrated in the app, saving more than half of the input information time.

Android License plate Recognition technology eight characteristics:

1. Supporting the full licence, including Blue Card, yellow cards (double), military licensing (double), police, agricultural license plate, Coach license plate, embassy and other specifications of the licence;
2. The license plate width requirement is low, the license plate width ≧ 50 pixels, does not affect the recognition;
3. Recognition of fast, extremely optimized license plate location and recognition algorithm;
4. Pure C code Writing
5. The overall license plate recognition rate is high, especially the Chinese character recognition products;
6. Mobile license plate recognition software configuration requirements: Operating system: can support Android version 2.3 or above, and recommended Android4.0 above
7. Android license plate Recognition camera requirements: Support autofocus, more than 3 million pixels.
8. Memory is about 3M

Shooting specifications for Android license plate recognition technology:

How to shoot a high recognition rate?

1. Keep the level, try to keep the license plate in the screen level;
2. Avoid tilt, do not tilt the shooting angle too large, so as to avoid the serious variant of the license plate;
3. Reasonable illumination, attention to the impact of light, as far as possible to avoid reflection and shadow;
4. Focus on clarity to avoid blurred images.
5. Authorization method: Serial number authorization, according to the number of intelligent Terminal Client authorization, time authorization, version authorization

Typical application Range :

1. Police Service: Patrol duty, traffic police law enforcement

2. Vehicle insurance: Auto-motion Survey,

3. Jeeves Parking management: Jeeves parking charge

Android version-license plate recognition technology Introduction