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ria-com / nomeroff-net

Nomeroff Net. Automatic numberplate recognition system.

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Nomeroff Net. Automatic numberplate recognition system

Nomeroff Net. Automatic numberplate recognition system. Version 0.3.1


Nomeroff Net is an opensource python license plate recognition framework based on the application of a convolutional neural network on the Mask_RCNN architecture, and cusomized OCR-module powered by GRU architecture.

The project is now at the initial stage of development, write to us if you are interested in helping us in the formation of a dataset for your country.


Installation in pip

To install cpu version nomeroff-net via pip, use

pip3 install git+
pip3 install nomeroff-net

To install gpu version nomeroff-net via pip, use

pip3 install git+
pip3 install nomeroff-net-gpu

Installation from Source (Linux)

Nomeroff Net requires Python 3.5, 3.6 or 3.7 and opencv 3.4 or latest

Clone Project

git clone
cd nomeroff-net
For Centos, Fedora and other RedHat-like OS:
# for Opencv
yum install libSM

for pycocotools install

yum install python3-devel

ensure that you have installed gcc compiler

yum install gcc

For Ubuntu and other Debian-like OS:
# ensure that you have installed gcc compiler
apt-get install gcc

for opencv install

apt-get install -y libglib2.0 apt-get install -y libsm6 apt-get install -y libfontconfig1 libxrender1 apt-get install -y libxtst6

for pycocotools install (Check the name of the dev-package for your python3)

apt-get install python3.6-dev

install python requirments
pip3 install Cython
pip3 install numpy
pip3 install git+
pip3 install -r requirements.txt

Installation from Source (Windows)

On Windows, you must have the Visual C++ 2015 build tools on your path. If you don't, make sure to install them from here:

Nomeroff Net. Automatic numberplate recognition system

Then, run

and select default options:

Nomeroff Net. Automatic numberplate recognition system

Hello Nomeroff Net

# Import all necessary libraries.
import os
import numpy as np
import sys
import matplotlib.image as mpimg

change this property

NOMEROFF_NET_DIR = os.path.abspath('../../')

specify the path to Mask_RCNN if you placed it outside Nomeroff-net project

MASK_RCNN_DIR = os.path.join(NOMEROFF_NET_DIR, 'Mask_RCNN') MASK_RCNN_LOG_DIR = os.path.join(NOMEROFF_NET_DIR, 'logs')


Import license plate recognition tools.

from NomeroffNet import filters, RectDetector, TextDetector, OptionsDetector, Detector, textPostprocessing, textPostprocessingAsync

Initialize npdetector with default configuration file.

nnet = Detector(MASK_RCNN_DIR, MASK_RCNN_LOG_DIR) nnet.loadModel("latest")

rectDetector = RectDetector()

optionsDetector = OptionsDetector() optionsDetector.load("latest")

Initialize text detector.

textDetector = TextDetector.get_static_module("eu")() textDetector.load("latest")

Detect numberplate

img_path = '../images/example2.jpeg' img = mpimg.imread(img_path) NP = nnet.detect([img])

Generate image mask.

cv_img_masks = filters.cv_img_mask(NP)

Detect points.

arrPoints = rectDetector.detect(cv_img_masks) zones = rectDetector.get_cv_zonesBGR(img, arrPoints)

find standart

regionIds, stateIds, countLines = optionsDetector.predict(zones) regionNames = optionsDetector.getRegionLabels(regionIds)

find text with postprocessing by standart

textArr = textDetector.predict(zones) textArr = textPostprocessing(textArr, regionNames) print(textArr)

['JJF509', 'RP70012']

Hello Jupyter Nomeroff Net

Online Demo

In order to evaluate the quality of work of Nomeroff Net without spending time on setting up and installing, we made an online form in which you can upload your photo and get the recognition result online

AUTO.RIA Numberplate Dataset

All data on the basis of which the training was conducted is provided by In the following, we will call this data the AUTO.RIA Numberplate Dataset.

We will be grateful for your help in the formation and layout of the dataset with the image of the license plates of your country. For markup, we recommend using VGG Image Annotator (VIA)

Nomeroff-Net Mask-RCNN Example: Nomeroff-Net Mask-RCNN Example
Mask detection example
Key points detection example

AUTO.RIA Numberplate Options Dataset

The system uses several neural networks. One of them is the classifier of numbers at the post-processing stage. It uses dataset AUTO.RIA Numberplate Options Dataset.

The categorizer accurately (99%) determines the country and the type of license plate. Please note that now the classifier is configured mainly for the definition of Ukrainian numbers, for other countries it will be necessary to train the classifier with new data.

Nomeroff-Net OCR Example

AUTO.RIA Numberplate OCR Datasets

As OCR, we use a specialized implementation of a neural network with GRU layers, for which we have created several datasets: * AUTO.RIA Numberplate OCR UA Dataset (Ukrainian) * AUTO.RIA Numberplate OCR UA Dataset (Ukrainian) with old design Dataset * AUTO.RIA Numberplate OCR EU Dataset (European) * AUTO.RIA Numberplate OCR RU Dataset (Russian) * AUTO.RIA Numberplate OCR KZ Dataset (Kazakh) * AUTO.RIA Numberplate OCR GE Dataset (Georgian)

If we did not manage to update the link on dataset you can find the latest version here

This gives you the opportunity to get 98% accuracy on photos that are uploaded to AUTO.RIA project

Nomeroff-Net OCR Example
Number plate recognition example

Road map

For several months now, we have been devoting some of our time to developing new features for the Nomeroff Net project. In the near future we plan: * Post a detailed instruction on the training of recognition models and classifier for license plates of your country. * To expand the classification of countries of license plates by which to determine the country in which this license plate is registered.


Contributions to this repository are welcome. Examples of things you can contribute: * Training on other datasets. * Accuracy Improvements.



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