PyLicensePlate.PyLicensePlate Class Reference

Detect license plates on NPU using YuNet TIM-VX. More...

Public Member Functions
def	__init__ (self)
	Constructor. More...
def	processGUI (self, inframe, helper)
	Process function with GUI output. More...

Public Attributes
	modelname
	model
	timer
	h
	w

Detailed Description

Detect license plates on NPU using YuNet TIM-VX.

This module runs on the JeVois-Pro NPU using a quantized deep neural network. It is derived from https://github.com/opencv/opencv_zoo/tree/master/models/license_plate_detection_yunet See LICENSE for license information.

Please note that the model is trained with Chinese license plates, so the detection results of other license plates with this model may be limited. See the screenshots of this module for examples, or search for "Chinese license plate" on the web for more images.

This module is mainly intended as a tutorial for how to run quantized int8 DNNs on the NPU using OpenCV and TIM-VX, here achieved through only small modifications of code from https://github.com/opencv/opencv_zoo - in particular, the core class for this model, LPD_YuNet, was not modified at all, and only the demo code was edited to use the JeVois GUI Helper for fast OpenGL drawing as opposed to slow drawings into OpenCV images.

Author

Laurent Itti

Display Name:

PyLicensePlate

Videomapping:

JVUI 0 0 30.0 CropScale=RGB24@512x288:YUYV 1920 1080 30.0 JeVois PyLicensePlate

Videomapping:

JVUI 0 0 30.0 CropScale=RGB24@256x144:YUYV 1920 1080 30.0 JeVois PyLicensePlate

Email:

itti@usc.edu

Address:

University of Southern California, HNB-07A, 3641 Watt Way, Los Angeles, CA 90089-2520, USA

Copyright

Copyright (C) 2022 by Laurent Itti, iLab and the University of Southern California

Main URL:

http://jevois.org

Support URL:

http://jevois.org/doc

Other URL:

http://iLab.usc.edu

License:

GPL v3

Distribution:

Unrestricted

Restrictions:

None

Definition at line 39 of file PyLicensePlate.py.

Constructor & Destructor Documentation

__init__()

def PyLicensePlate.PyLicensePlate.__init__

(

self

)

Constructor.

Definition at line 42 of file PyLicensePlate.py.

Member Function Documentation

processGUI()

def PyLicensePlate.PyLicensePlate.processGUI	(		self,
			inframe,
			helper
	)

Process function with GUI output.

Definition at line 63 of file PyLicensePlate.py.

References demo.float, PyLicensePlate.PyLicensePlate.h, env_dims.h, mobilenet_v1.MobileNetV1.model, mobilenet_v2.MobileNetV2.model, mp_palmdet.MPPalmDet.model, lpd_yunet.LPD_YuNet.model, PyNetORT.PyNetORT.model, PyNetURetinex.PyNetURetinex.model, PyCoralDetect.PyCoralDetect.model, PyCoralSegment.PyCoralSegment.model, PyLicensePlate.PyLicensePlate.model, PyNetOpenCV.PyNetOpenCV.model, PyEmotion.PyEmotion.model, PyCoralClassify.PyCoralClassify.model, PyClassificationDNN.PyClassificationDNN.model, TensorFlow.model, PyDetectionDNN.PyDetectionDNN.model, PyLicensePlate.PyLicensePlate.modelname, PythonTutorial2::PythonTutorial2.timer, PyModule::__MODULE__.timer, PyFaceMesh.PyFaceMesh.timer, PyHandDetector.PyHandDetector.timer, PyDMTX.PyDMTX.timer, PyEmotion.PyEmotion.timer, PyLicensePlate.PyLicensePlate.timer, PyCoralDetect.PyCoralDetect.timer, PyCoralSegment.PyCoralSegment.timer, PyCoralClassify.PyCoralClassify.timer, PyClassificationDNN.PyClassificationDNN.timer, FirstPython.FirstPython.timer, PyDetectionDNN.PyDetectionDNN.timer, E.w, PyLicensePlate.PyLicensePlate.w, and env_dims.w.

Member Data Documentation

h

PyLicensePlate.PyLicensePlate.h

Definition at line 58 of file PyLicensePlate.py.

Referenced by PyLicensePlate.PyLicensePlate.processGUI(), and PySceneText.PySceneText.processGUI().

model

PyLicensePlate.PyLicensePlate.model

Definition at line 46 of file PyLicensePlate.py.

Referenced by PyLicensePlate.PyLicensePlate.processGUI().

modelname

PyLicensePlate.PyLicensePlate.modelname

Definition at line 44 of file PyLicensePlate.py.

Referenced by PyLicensePlate.PyLicensePlate.processGUI(), and PySceneText.PySceneText.processGUI().

timer

PyLicensePlate.PyLicensePlate.timer

Definition at line 55 of file PyLicensePlate.py.

Referenced by PythonOpenCV.PythonOpenCV.process(), PythonSandbox.PythonSandbox.process(), PythonParallel.PythonParallel.process(), PythonObject6D.PythonObject6D.process(), PyPoseDetector.PyPoseDetector.processGUI(), PySelfie.PySelfie.processGUI(), PyObjectron.PyObjectron.processGUI(), PyLicensePlate.PyLicensePlate.processGUI(), PySceneText.PySceneText.processGUI(), PythonTest.PythonTest.processGUI(), PythonSandbox.PythonSandbox.processGUI(), PythonSandbox.PythonSandbox.processNoUSB(), and PythonObject6D.PythonObject6D.processNoUSB().

w

PyLicensePlate.PyLicensePlate.w

Definition at line 59 of file PyLicensePlate.py.

Referenced by PyLicensePlate.PyLicensePlate.processGUI(), and PySceneText.PySceneText.processGUI().

---

The documentation for this class was generated from the following file:

• src/Modules/PyLicensePlate/PyLicensePlate.py