WO2017193701A1 - 共享单车的倒地检测方法 - Google Patents
共享单车的倒地检测方法 Download PDFInfo
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- WO2017193701A1 WO2017193701A1 PCT/CN2017/077195 CN2017077195W WO2017193701A1 WO 2017193701 A1 WO2017193701 A1 WO 2017193701A1 CN 2017077195 W CN2017077195 W CN 2017077195W WO 2017193701 A1 WO2017193701 A1 WO 2017193701A1
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- bicycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0857—Carbon oxides
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/22—Selection of materials for exhaust purification used in non-catalytic purification apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/022—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting CO or CO2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the invention relates to the field of bicycle field and computer vision processing, and in particular to a method for detecting a ground fault of a shared bicycle.
- the invention provides a method for detecting the falling of a shared bicycle, which can improve the efficiency of detecting whether the bicycle is thrown onto the ground.
- the method for detecting the falling of a shared bicycle of the present invention comprises the following steps:
- the bicycle identification code image is an image pre-applied to a specific part of the bicycle, and the image includes several independent and Sub-identification code images with different attribute values;
- the output is displayed to inform the corresponding staff that there is a need to deal with the bicycle falling to the ground.
- the distance between the center point of all other sub-identification image images and the center point of the reference image is calculated using the following formula: In the formula, Representing the distance, a vector representing the reference image, A vector representing other sub-ID images, and m represents the sum of the numbers of all sub-ID images.
- the standard distance coefficient is calculated using the following formula: Where ⁇ denotes the sub-identification image mean, X denotes a standard distance coefficient, and N denotes the total amount of attribute values.
- the process of calculating the deflection angle of the bicycle according to the offset angle and the offset direction comprises: calculating the rotation coefficient according to the offset angle ⁇ and the offset direction (f x , f y , f z ) H, and calculating a deflection angle ⁇ of the bicycle corresponding to the reference angle according to the rotation coefficient H; using the following formula:
- a sub-identification code image is re-selected as the updated reference image, and the calculation returns to calculate all other sub-identification code image centers. The step of the distance between the point and the center point of the updated reference image.
- the bicycle identification code further includes direction information.
- the method for detecting the falling of the shared bicycle of the present invention has a bicycle identification code attached to the bicycle in advance, and then obtains the bicycle identification code image through the surveillance cameras everywhere, and calculates each child.
- the distance between the identification code images and the standard distance coefficient are selected, and the sub-identification code image corresponding to the distance of the standard distance coefficient is less than the set threshold value is selected to compare with the pre-stored original identification code image, and the sub-identification code image is calculated.
- the offset angle and the offset direction are used to calculate the deflection angle of the entire bicycle, thereby identifying whether the bicycle is down to the ground, and if so, automatically outputting an alarm prompt message to the corresponding staff for reminding.
- the solution of the present invention is completely implemented by a software algorithm, and does not need to add additional hardware sensors, avoids the blind search of manual detection, and can find and remind the first time where there is a bicycle falling to the ground and realize the cost.
- Low, and high accuracy greatly improve the efficiency of bicycle down detection, and is conducive to the sharing and use of bicycles in the community, to facilitate the public's green travel.
- FIG. 1 is a schematic flow chart of a method for detecting a falling of a shared bicycle provided by the present invention.
- a schematic flowchart of a preferred embodiment of a method for detecting a fall of a shared bicycle includes the following steps:
- Step S1 acquiring a video image captured by the surveillance camera in real time, and extracting a bicycle identification code image on the bicycle from the video image, and then proceeding to step S2;
- the bicycle identification code image is an image pre-applied to a specific part of the bicycle, and the image is
- the image includes a plurality of sub-identification image images that are independent of each other and have different attribute values.
- a bicycle identification code is attached to the bicycle in advance (for example, it can be attached to the handlebar and the seatbar, etc.), and the bicycle identification code is specially made, similar to the form of the two-dimensional code, and each manufacturer can According to the specific needs of the bicycle identification code, the most basic requirement is to add direction information to the bicycle identification code, so that the direction of the original identification code can be obtained, so that the direction of the original identification code can be called in subsequent comparison. In addition to this, it is also possible to add information unique to each manufacturer in the bicycle identification code to distinguish it. At present, there are some similar identification codes in the field of computer vision computing, which are not described in the present invention.
- Step S2 performing image segmentation processing on the bicycle identification code image, obtaining each sub-identification code image, and arbitrarily selecting one sub-identification code image as a reference image, and calculating all other sub-identification code image center points and the reference image center point. The distance between them then proceeds to step S3.
- the distance between all other sub-identification image image center points and the reference image center point may be calculated using the following formula: In the formula, Representing the distance, a vector representing the reference image, A vector representing other sub-ID images, and m represents the sum of the numbers of all sub-ID images.
- step S3 the total amount of attribute values of each sub-ID image is calculated, and the standard distance coefficient is calculated according to the total amount of the attribute values, and then proceeds to step S4.
- the standard distance coefficient can be calculated using the following formula:
- ⁇ denotes the sub-identification image mean
- X denotes the standard distance coefficient
- N denotes the total amount of the attribute value
- the attribute refers to the dimension information such as the direction value and the feature value
- each sub-ID image is given a different from the other sub
- the attribute value of the identification code image is added, and the attribute values of all the sub-ID images are added to obtain the total value of the attribute values.
- Step S4 determining whether there is a distance from the standard distance coefficient that is less than the set threshold, and if so, comparing the sub-identification code image corresponding to the distance with the original identification code image stored in the database in advance, and determining by comparison The offset angle and the offset direction of the sub-ID image with respect to the original ID image, and then proceeds to step S5.
- ⁇ is a constant coefficient, which may be 2 in the embodiment of the present invention
- ⁇ is a constant coefficient, which may be 2 in the embodiment of the present invention
- step S5 the deflection angle of the bicycle is calculated according to the offset angle and the offset direction, and then proceeds to step S6.
- the process of calculating the deflection angle of the bicycle according to the offset angle and the offset direction in this step may specifically include: according to the offset angle ⁇ and the offset direction (f x , f y , f z ) calculating the rotation coefficient H, and calculating the deflection angle ⁇ of the bicycle corresponding to the reference angle according to the rotation coefficient H; the following formula can be adopted:
- v f (0, 0, 1) is the reference vector.
- step S6 it is determined whether the deflection angle of the bicycle exceeds a set angle threshold. If yes, it is determined that the bicycle has fallen to the ground.
- the local GPS positioning information of the surveillance camera can be automatically invoked, and the monitoring range of the surveillance camera can be A surveillance camera captures that the grounded bicycle is in a certain area near the surveillance camera, so the local GPS positioning information of the surveillance camera is defaulted to an inverted single.
- the approximate location of the vehicle is edited and the local GPS positioning information is edited into the first alarm prompt information for output display to notify the corresponding staff that the bicycle has to be disposed of.
- the efficiency is higher, the downhill bicycle can be found and notified at the first time; in addition, compared with the scheme of adding a hardware sensor on the bicycle to detect whether the bicycle is fell to the ground, On the one hand, it does not increase the hardware cost of the bicycle, and the maintenance cost is lower than that of the hardware sensor.
- the scheme passes the verification of the sub-identification image. In order to improve the detection accuracy, it can be measured to achieve a detection accuracy of more than 99.9%, which is more advantageous than the hardware sensor solution.
- a sub-identification code image may be re-selected as the updated reference image, and the process returns to the calculation in step S2. The step of the distance between the center point of the other all sub-identification code images and the updated reference image center point until the condition is satisfied.
- the method includes the following steps: if the ratio of the distance to the standard distance coefficient is less than one than the set threshold, the distances corresponding to the sub-identification code images satisfying the condition are sorted in ascending order And selecting the first sub-identification code image to perform the step of comparing with the original identification code image.
- the bicycle identification code may further include direction information.
- the following steps may be further included:
- the structure and shape of the bicycle are represented by using the geometric model or structure of the bicycle in advance. Shape, and by extracting the characteristics of the object of the bicycle, establish a correspondence between the model and the image, and then through the geometric method for bicycle recognition, the recognition efficiency is higher and more accurate.
- the distance between the first key feature point and the second key feature point calculated in the above implementation does not satisfy the pre-preparation.
- the distance threshold is set, it indicates that there is a fault in the bicycle identification code, such as loss or damage.
- an alarm prompt is issued to notify the corresponding staff to replace the bicycle identification code.
- the method for detecting the falling of the shared bicycle of the present invention has a bicycle identification code attached to the bicycle in advance, and then obtains the bicycle identification code image through the surveillance cameras located everywhere, and calculates each child.
- the distance between the identification code images and the standard distance coefficient are selected, and the sub-identification code image corresponding to the distance of the standard distance coefficient is less than the set threshold value is selected to compare with the pre-stored original identification code image, and the sub-identification code image is calculated.
- the offset angle and the offset direction are used to calculate the deflection angle of the entire bicycle, thereby identifying whether the bicycle is down to the ground, and if so, automatically outputting an alarm prompt message to the corresponding staff for reminding.
- the solution of the present invention is completely implemented by a software algorithm, and does not need to add additional hardware sensors, avoids the blind search of manual detection, and can find and remind the first time where there is a bicycle falling to the ground and realize the cost.
- Low, and high accuracy greatly improve the efficiency of bicycle down detection, and is conducive to the sharing and use of bicycles in the community, to facilitate the public's green travel.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas After Treatment (AREA)
- Image Analysis (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Claims (6)
- 一种共享单车的倒地检测方法,其特征在于,包括如下步骤:获取监控摄像头实时拍摄到的视频图像,并从视频图像中提取单车上的单车识别码图像;所述单车识别码图像为预先贴在单车特定部位的图像,且该图像中包括若干个彼此独立且属性值各不相同的子识别码图像;对所述单车识别码图像进行图像分割处理,获得各子识别码图像,并任意挑选一个子识别码图像为基准图像,计算其他所有子识别码图像中心点与该基准图像中心点之间的距离,采用如下公式:式中,表示所述距离,表示基准图像的向量,表示其他子识别码图像的向量,m表示所有子识别码图像的数量总和;判断是否存在与标准距离系数的比值小于设定阈值的距离,若是,则将该距离所对应的子识别码图像与预先存储的原始识别码图像进行对比,确定所述子识别码图像相对于所述原始识别码图像的偏移角度和偏移方向;根据所述偏移角度和偏移方向计算单车的偏转角度,具体为:根据所述偏移角度α和偏移方向(fx,fy,fz)计算旋转系数H,并根据所述旋转系数H计算单车相当于基准角度的偏转角度β;采用如下公式:式中,I是3x3的单位矩阵,vf=(0,0,1);判断所述单车的偏转角度是否超过设定角度阈值,若是,则判定为单车已 经倒地,此时自动获取本地GPS定位信息,并将所述本地GPS定位信息编辑到第一告警提示信息中进行输出显示,以通知相应的工作人员有单车倒地需要处理。
- 根据权利要求1所述的共享单车的倒地检测方法,其特征在于,若不存在与标准距离系数的比值小于设定阈值的距离,则重新挑选一个子识别码图像作为更新后的基准图像,并返回计算所述其他所有子识别码图像中心点与该更新后的基准图像中心点之间的距离的步骤。
- 根据权利要求1所述的共享单车的倒地检测方法,其特征在于,在判断得出存在与标准距离系数的比值小于设定阈值的距离之后、将该距离所对应的子识别码图像与预先存储的原始识别码图像进行对比之前,还包括步骤:若所述与标准距离系数的比值小于设定阈值的距离的个数多于1个,则对满足此条件下的各子识别码图像对应的距离按从小到大的顺序进行排序,并选择排序第一位的子识别码图像来执行与原始识别码图像进行对比的步骤。
- 根据权利要求1所述的共享单车的倒地检测方法,其特征在于,所述单车识别码中还包括方向信息。
- 根据权利要求1-4任意一项所述的共享单车的倒地检测方法,其特征在于,在从视频图像中提取单车上的单车识别码图像之前,还包括如下步骤:将所述视频图像输入到预先建立的单车模型中进行匹配,提取所述视频图像中的物体特征进行相似度计算;当相似度计算的结果超过设定特征阈值时,判定为检测到视频图像中存在单车,并提取出与所述物体特征相近的纹理进行保存;否则判定为视频图像中不存在单车,并返回摄像头实时拍摄视频图像的步骤。
- 根据权利要求5所述的共享单车的倒地检测方法,其特征在于,在提取出单车上的单车识别码图像之后,还包括如下步骤:从所述单车的车把上贴着的单车识别码图像中提取出第一关键特征点;以及从所述单车的坐杆上贴着的单车识别码图像中提取出第二关键特征点;计算所述第一关键特征点和第二关键特征点之间的距离;判断所述距离是否在预设的距离阈值内,若否,则输出第二告警提示信息,以提示相应的工作人员所述单车识别码出现故障。
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CN113823040A (zh) * | 2020-06-19 | 2021-12-21 | 中国移动通信集团福建有限公司 | 共享单车的管理方法及系统 |
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CN111162931B (zh) * | 2019-12-12 | 2022-09-16 | 上海钧正网络科技有限公司 | 共享车辆管理方法、装置、计算机设备和可读存储介质 |
CN115223092B (zh) * | 2022-07-15 | 2023-11-14 | 广东万龙科技有限公司 | 一种大数据场景下的视频监控系统及方法 |
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- 2016-05-09 CN CN201610300168.3A patent/CN105840284A/zh active Pending
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2017
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