EP4196903A1 - Procédé pour faire fonctionner un système d'assistance pour déterminer une longueur d'un objet, produit de programme informatique, support de stockage lisible par ordinateur et système d'assistance - Google Patents

Procédé pour faire fonctionner un système d'assistance pour déterminer une longueur d'un objet, produit de programme informatique, support de stockage lisible par ordinateur et système d'assistance

Info

Publication number
EP4196903A1
EP4196903A1 EP21752685.4A EP21752685A EP4196903A1 EP 4196903 A1 EP4196903 A1 EP 4196903A1 EP 21752685 A EP21752685 A EP 21752685A EP 4196903 A1 EP4196903 A1 EP 4196903A1
Authority
EP
European Patent Office
Prior art keywords
length
camera
computing device
electronic computing
assistance system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21752685.4A
Other languages
German (de)
English (en)
Inventor
Muhammad Nassef Abdelkader HASSAAN
Jean Francois Bariant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of EP4196903A1 publication Critical patent/EP4196903A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/20—Analysis of motion
    • G06T7/277—Analysis of motion involving stochastic approaches, e.g. using Kalman filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G06F18/20—Analysing
    • G06F18/24—Classification techniques
    • G06F18/241—Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches
    • G06F18/2415—Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches based on parametric or probabilistic models, e.g. based on likelihood ratio or false acceptance rate versus a false rejection rate
    • G06F18/24155—Bayesian classification
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
    • G06V10/764—Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
    • G06V10/84—Arrangements for image or video recognition or understanding using pattern recognition or machine learning using probabilistic graphical models from image or video features, e.g. Markov models or Bayesian networks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/50—Context or environment of the image
    • G06V20/56—Context or environment of the image exterior to a vehicle by using sensors mounted on the vehicle
    • G06V20/58—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30248—Vehicle exterior or interior
    • G06T2207/30252—Vehicle exterior; Vicinity of vehicle
    • G06T2207/30261—Obstacle
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V2201/00—Indexing scheme relating to image or video recognition or understanding
    • G06V2201/08—Detecting or categorising vehicles

Definitions

  • the invention relates to a method for operating an assistance system of a motor vehicle, in which an object in an area surrounding the motor vehicle is detected by means of a detection device of the assistance system and the object is classified by means of an electronic computing device of the assistance system for further evaluation by means of the electronic computing device, with depending a first length of the object is specified by the classification for further evaluation by means of the electronic computing device, and the object is additionally recorded and evaluated by means of a camera of the assistance system and classified by means of the camera and a second length of the object is determined and the classification and the second length can be transmitted to the electronic computing device for further evaluation. Furthermore, the invention relates to a computer program product, a computer-readable storage medium and an assistance system.
  • a front camera in a motor vehicle cannot measure the length of a dynamic object.
  • the camera classifies the object and, depending on this classification, a predefined length for this object is then determined.
  • the classification of the camera is not very stable, since it changes the class several times, for example from a passenger car to a truck.
  • the predefined length is then implemented by the camera to update an item of object information, for example during object tracking, the length cannot be changed, for example on the basis of another sensor.
  • the camera can specify that an object is 2.5 m long, while for example a lidar sensor device provides information that the object is 5 m long. This leads to conflicts in a tracking algorithm, so that the corresponding length can only be determined and used with difficulty.
  • US 2013/0245929 A1 discloses a filter method for sensor data that is formed by a sensor system for detecting objects.
  • a measurement takes place a scaling value from the sensor data, the scaling value corresponding to a change in the size of an object from the sensor data over a time interval, and determining a measurement error parameter of the scaling value and performing Kalman filtering that is directly based on the measured scaling value, the time interval, and the measurement error parameter based to estimate at least one normalized motion parameter of the object relative to the sensor system.
  • CN105631414 A relates to a vehicle-carried device and method for classifying multiple obstacles based on a Bayesian classifier.
  • the classification device consists of a camera and a PC connected to the camera, a Kalman filter module for performing Kalman filtering on the video image of the front of the vehicle captured by a camera and for detecting an obstacle, a feature extraction module for performing the feature extraction is used on the detected obstacle, and a Bayesian classification module used for using a Bayesian classifier to obtain the classification of the obstacle target according to the obstacle target's features, the features being a symmetry feature, a horizontal edge straightness feature and include a feature of aspect ratio; and the classification includes a cyclist/motorcyclist, a vehicle side face, a vehicle front face, and pedestrians.
  • the object of the present invention is to create a method, a computer program product, a computer-readable storage medium and an assistance system, by means of which improved object tracking for a motor vehicle can be carried out.
  • One aspect of the invention relates to a method for operating an assistance system of a motor vehicle, in which an object in an area surrounding the motor vehicle is detected by means of a detection device of the assistance system and the object is classified by means of an electronic computing device of the assistance system for further evaluation by means of the electronic computing device, wherein depending on the classification, a first length of the object for the further one Evaluation is specified by the electronic computing device and the object is also detected and evaluated by a camera of the assistance system and is classified by the camera and a second length of the object is determined and the classification and the second length are transmitted to the electronic computing device for further evaluation will.
  • object tracking which can also be referred to as object tracking
  • current length information about the object can thus be adjusted, for example.
  • the invention thus solves the problem that the length determined by means of the camera can be updated by means of other sensors without conflicts arising between further information about the length with the other sensors.
  • a method for processing the data from a vehicle camera, in particular a front camera is proposed or for tracking objects in the vehicle environment using a map, with a length of an object, for example another vehicle or a truck, being able to be determined and this length is now processed further, whereby the Kalman filter restriction is used in particular for this purpose.
  • the restricted Kalman filter can also be referred to as a constrained Kalman filter.
  • a minimum length for example 2.5 m for passenger cars or 5 m for trucks
  • a maximum length for example 5 m for passenger cars
  • this specification then in turn acting as a restriction on the Kalman filter for determining the length is given, so that these lie in these minimum and maximum values.
  • the classification of the object is thus carried out in order to estimate a length of the object.
  • the Kalman filter filters in particular over time, with a probability being specified, in particular by empirical tests. By appropriately classifying the object in an object class, a minimum length and/or a maximum length can be specified for the object.
  • the Kalman filter then in turn operates under a condition or constraint, this constraint for the Kalman filter being the particular class of camera.
  • A corresponds to the Langrage multiplier and is typically used to find the solution of a least squares problem with a constraint
  • x describes the new estimate considering the constraint
  • P n is the covariance matrix of the estimate without considering the constraint, i.e. the result of the Kalman filter.
  • D can also be used to specify a constraint to a linear combination of the state parameters, e.g.
  • the object in the camera is classified by means of a Bayesian filter of the camera.
  • the Bayes filter can be used to provide a simple yet reliable method by which the camera can be classified.
  • the Bayesian filter uses corresponding probabilities and can decide under given conditions whether a class change has taken place.
  • the Bayesian filter is thus switched between the classification of the camera and the electronic computing device, so that a sporadic class change of the camera can be filtered out using the Bayesian filter.
  • a short-term class jump can thus be neglected when evaluating the camera, so that a more reliable classification can be carried out.
  • the classification of the Bayes filter is then in turn transmitted to the electronic computing device for further evaluation.
  • a passenger car and a truck and a pedestrian and a bicycle and a motorcycle are specified for classification as object classes of the camera and/or electronic computing device.
  • Different object classes can thus be specified, in which case the object can then be divided into one of these classes.
  • possible road users can thus be classified, making robust object tracking possible.
  • each of the object classes of the camera is assigned the same probability in the Bayes filter at the beginning of a classification. For example, if five classes are specified, the probability in the Bayes filter at the beginning of the object classification would be 0.2 in particular. Thus, when object tracking is initialized, the respective probabilities for the object classes are assigned the same value.
  • an object class is determined by means of a further electronic computing device of the camera and this is transmitted to the Bayes filter and a respective probability of an object class im Bayes filter increased after a respective object class determination by the additional electronic computing device of the camera.
  • an object class can thus be determined by the camera, which in turn is then transmitted to the Bayes filter.
  • the Bayesian filter increases the probability for the passenger car object class, while the other probabilities for the other classes decrease.
  • the camera uses the additional electronic computing device to determine that the object of the object class can be assigned to a passenger car, then the probability in the Bayes filter is set to 0.7, for example.
  • the further probabilities for the further object classes decrease accordingly.
  • the classification of the camera can be filtered, allowing more robust object tracking to be performed.
  • the object is classified by the camera and this is transmitted to the electronic computing device.
  • a probability threshold value for one of the object classes is reached by the Bayes filter.
  • the object is classified by the camera and this is transmitted to the electronic computing device.
  • the probability in the Bayes filter is higher than 0.6, a corresponding classification is carried out by the Bayes filter.
  • the camera If a change is then carried out by the camera, in which case the camera then in turn transfers a different object class to the Bayes filter, the Bayes filter will reject this information since the probability is still too high to carry out a change of object class.
  • the camera should inform the Bayesian filter over a specified period of time that a corresponding class change is to be carried out.
  • the limitation of the Kalman filter is specified as a linear limitation.
  • the restricted Kalman filter is based on an estimate of the Kalman filter after a measurement update (update) x n and performs a further estimation x such that the linear constraint
  • the current length is adjusted to the second length determined by the camera using the restricted Kalman filter. A reliable length update is thus made possible.
  • the current length is adjusted to the predefined first length by means of the Kalman filter. This allows a reliable and robust length update to be performed.
  • the object in the surroundings is detected by means of an ultrasonic sensor device and/or by means of a radar sensor device and/or by means of a lidar sensor device as the detection device.
  • the object can preferably be detected by means of the radar sensor device and/or by means of the lidar sensor device, since these have in particular a large range and high resolution.
  • a length of the object can be reliably determined by means of the radar sensor device and/or by means of the lidar sensor device.
  • a further aspect of the invention relates to a computer program product with program code means which are stored in a computer-readable medium in order to carry out the method for operating the assistance system according to the preceding aspect when the computer program product is processed on a processor of an electronic computing device.
  • Yet another aspect of the invention relates to a computer-readable storage medium with a computer program product according to the preceding aspect.
  • the computer-readable storage medium can in particular be designed as part of an electronic computing device.
  • a further aspect of the invention relates to an assistance system for a motor vehicle with at least one detection device, with a camera and with an electronic computing device which has at least one restricted Kalman filter, the assistance system being designed to carry out a method according to the preceding aspect. In particular, the method is carried out using the assistance system.
  • Yet another aspect of the invention relates to a motor vehicle with an assistance system according to the preceding aspect.
  • the motor vehicle is designed in particular as a passenger car.
  • the motor vehicle can be operated in particular as an at least partially autonomous motor vehicle or as a fully autonomous motor vehicle.
  • Advantageous configurations of the method are to be regarded as advantageous configurations of the computer program product, the computer-readable storage medium, the assistance system and the motor vehicle.
  • the assistance system and the motor vehicle have specific features which enable the method to be carried out or an advantageous embodiment thereof.
  • FIG. 1 shows a schematic plan view of a motor vehicle with an embodiment of an assistance system
  • FIG. 2 shows a schematic flowchart according to an embodiment of the method.
  • the assistance system 2 has at least one detection device 3 and a camera 4. Furthermore, the assistance system 2 has an electronic computing device 5 . In particular, the camera 4 also has a further electronic computing device 6 . In particular, the electronic computing device 5 also has a restricted Kalman filter 7 .
  • the detection device 3 can in particular be embodied as an ultrasonic sensor device and/or as a radar sensor device and/or as a lidar sensor device.
  • FIG. 1 shows that an object 9 can be detected in an environment 8 of the motor vehicle 1 .
  • the object 9 can be a passenger car, a truck, a pedestrian, a bicycle or a motorcycle, for example.
  • the object 9 is shown in particular as a truck.
  • the object 9 in the surroundings 8 of the motor vehicle 1 is detected by the detection device 3 of the assistance system 2
  • the object 9 is detected by the electronic computing device 5 of the assistance system 2 for further evaluation by means of the electronic Computing device 5 is classified, with a first length L of the object 9 being specified for further evaluation by means of the electronic computing device 5 depending on the classification, and with the object 9 is detected and evaluated by the camera 4 of the assistance system 2 and classified by the camera 4 and a second length L of the object 9 is determined and the classification and the second length L are transmitted to the electronic computing device 5 for further evaluation.
  • the object 9 in the camera 4 is classified by means of a Bayes filter 10 of the camera 4 .
  • a car and a truck and a pedestrian and a bicycle and a motorcycle can be specified as object classes of the camera 4 and/or the electronic computing device 5 for classification.
  • each of the object classes of the camera 4 is assigned an equal probability in the Bayes filter 10 at the start of a classification.
  • the probabilities in the Bayes filter 10 result in particular in the value of 1.
  • a second step S2 of the method provision is made in particular for an object class to be determined using the additional electronic computing device 6 of the camera 4 and for this to be transmitted to the Bayes filter 10 and a respective probability of an object class in the Bayes filter 10 after a respective object class determination is increased by the additional electronic computing device 6 of the camera 4.
  • the probabilities being defined, for example, in such a way that a probability indicates that the camera 4 specifies, for example, that the object 9 is a motor vehicle, the object 9 also being a motor vehicle.
  • a true positive rate can thus be specified for the motor vehicle or the passenger car.
  • the Bayes filter also requires the probabilities in the event that the camera 4 reproduces that it is not a passenger car although it is a passenger car. In the sum are all Probabilities 1. In particular, only when the Bayes filter 10 reaches a probability threshold value for one of the object classes is the object 9 classified by the camera 4 and this is transmitted to the electronic computing device 5, the probability threshold value being able to be 0.6, for example .
  • the length L is then determined using the restricted Kalman filter 7, the restriction being in particular a linear restriction.
  • a class with the highest probability can be selected by the Bayes filter 10 .
  • a minimum length for example 2.5 m for passenger cars or 5 m for trucks, can then be specified, for example, or a maximum length, for example 5 m for passenger cars, with this specification then in turn as a restriction for the Kalman filter 7 to determine of the length L is specified, so that the determined length L lies in these minimum and maximum value ranges.
  • the third step S3 it can be provided in particular that if the length L of the object 9 determined by the camera 4 is greater than the predetermined first length L, then the current length L by means of the limited Kalman filter 7 to the by means of the camera 4 specific second length L is adjusted. Alternatively, if the length L of the object 9 determined using the camera 4 is less than the specified first length L, then the current length L is adjusted to the specified first length L using the restricted Kalman filter 7 .
  • the constraint of the Kalman filtering can be performed, for example, with a Kalman filter estimate after the first detection update x n and a further estimate x, which then satisfies the linear constraint
  • A corresponds to the Langrage multiplier and is typically used to find the solution of a least squares problem with a constraint
  • x describes the new estimate considering the constraint
  • P n is the covariance matrix of the estimate without considering the constraint, i.e. the result of the Kalman filter.
  • D can also be used to specify a constraint to a linear combination of the state parameters, e.g.
  • the figure shows a determination of the length using a camera 4 based on a filtered class.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Multimedia (AREA)
  • Software Systems (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Databases & Information Systems (AREA)
  • Computing Systems (AREA)
  • Health & Medical Sciences (AREA)
  • Probability & Statistics with Applications (AREA)
  • Data Mining & Analysis (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • Evolutionary Biology (AREA)
  • Bioinformatics & Computational Biology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Traffic Control Systems (AREA)
  • Image Analysis (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'un système d'assistance (2), dans lequel un objet (9) est détecté et l'objet (9) est classé pour une évaluation ultérieure au moyen d'un dispositif informatique électronique (5), la classification étant prise en tant que base pour prédéfinir une première longueur (L) de l'objet (9), et l'objet (9) étant en outre capturé au moyen d'une caméra (4), évalué et classé et une seconde longueur (L) de l'objet (9) étant déterminée et la classification et la seconde longueur (L) étant transmises au dispositif informatique électronique (5), la première longueur prédéfinie (L) étant adaptée sur la base de la seconde longueur (L) pour produire une longueur courante (L) et un filtre de Kalman (7) limité étant utilisé pour mettre à jour la longueur courante (L), la limitation du filtre de Kalman (7) étant prédéfinie par la classification déterminée au moyen de la caméra (4). L'invention concerne également un produit de programme informatique, un support de stockage lisible par ordinateur et un système d'assistance (2).
EP21752685.4A 2020-08-11 2021-08-02 Procédé pour faire fonctionner un système d'assistance pour déterminer une longueur d'un objet, produit de programme informatique, support de stockage lisible par ordinateur et système d'assistance Withdrawn EP4196903A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020121061.2A DE102020121061A1 (de) 2020-08-11 2020-08-11 Verfahren zum Betreiben eines Assistenzsystems zur Bestimmung einer Länge eines Objekts, Computerprogrammprodukt, computerlesbares Speichermedium sowie Assistenzsystem
PCT/EP2021/071517 WO2022033905A1 (fr) 2020-08-11 2021-08-02 Procédé pour faire fonctionner un système d'assistance pour déterminer une longueur d'un objet, produit de programme informatique, support de stockage lisible par ordinateur et système d'assistance

Publications (1)

Publication Number Publication Date
EP4196903A1 true EP4196903A1 (fr) 2023-06-21

Family

ID=77300908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21752685.4A Withdrawn EP4196903A1 (fr) 2020-08-11 2021-08-02 Procédé pour faire fonctionner un système d'assistance pour déterminer une longueur d'un objet, produit de programme informatique, support de stockage lisible par ordinateur et système d'assistance

Country Status (6)

Country Link
US (1) US20230267633A1 (fr)
EP (1) EP4196903A1 (fr)
JP (1) JP2023537987A (fr)
CN (1) CN116097317A (fr)
DE (1) DE102020121061A1 (fr)
WO (1) WO2022033905A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148064A1 (de) 2001-09-28 2003-04-10 Ibeo Automobile Sensor Gmbh Verfahren zur Erkennung und Verfolgung von Objekten
DE102012203909A1 (de) 2012-03-13 2013-09-19 Robert Bosch Gmbh Filterverfahren und Filtervorrichtung für Sensordaten
CN105631414B (zh) 2015-12-23 2019-04-05 上海理工大学 一种基于贝叶斯分类器的车载多障碍物分类装置及方法

Also Published As

Publication number Publication date
JP2023537987A (ja) 2023-09-06
US20230267633A1 (en) 2023-08-24
DE102020121061A1 (de) 2022-02-17
WO2022033905A1 (fr) 2022-02-17
CN116097317A (zh) 2023-05-09

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