WO2018153304A1 - 基于adas系统的地图道路标记及道路质量采集装置及方法 - Google Patents
基于adas系统的地图道路标记及道路质量采集装置及方法 Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
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- G01C21/3804—Creation or updating of map data
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- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
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- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
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Definitions
- the invention relates to the field of automotive electronic technology, in particular to a map road marking and road quality collecting device and method based on an ADAS system.
- ADAS Advanced Driving Assistant System
- LDW latitude and low-latency
- FCW front vehicle collision
- PCW pedestrian detection
- the road data collection work for high precision is basically the use of a dedicated map collection vehicle, and the installation of laser radar and other equipment on the collection vehicle, the cost is in the millions to 10 million, and requires specialized personnel and time.
- the collection of road quality, such as defects and flatness, is also achieved by using a special collection vehicle, which is equipped with multiple laser instruments and gratings. The cost is high and the operation efficiency of the person is low.
- the technical problem to be solved by the present invention is to provide a map road marking and road quality collecting device and method based on the ADAS system, in view of the defects of high quality and low efficiency in identifying road quality by devices such as laser radar and the like in the prior art.
- the invention provides a map road marking and road quality collecting device based on an ADAS system, which comprises the following modules:
- An image acquisition module for acquiring a color image in front of the traveling vehicle in real time
- An image preprocessing module for converting a color image into a grayscale image
- the ADAS module is used to identify the vehicle, pedestrian and obstacle areas in the grayscale image, and to perform lane line detection on the grayscale image, to output the feature point set of the lane line in the image, the line equation and its lane region in the image. ;
- the lane line position calculation module is configured to inversely transform the feature point set of the lane line to the physical world coordinate system coordinate centered on the camera, perform curve fitting on the feature point after transforming the coordinate system, and calculate lane line position information;
- a lane indicator detection module for detecting a lane direction function mark in the lane area, including a straight line, a left turn, a right turn, a turn head, and a straight left turn mark;
- the lane defect detection module is configured to exclude the identified vehicle, pedestrian and obstacle regions in each lane region, obtain a defect detection ROI region, and detect whether the defect detection ROI region exists in the ROI region according to the gray image in the defect detection ROI region.
- the data processing module is configured to extract corresponding road defect information, including defect type, road quality, position information, and original image information, in the region where the road defect exists, and extract the identified lane direction function mark and corresponding position information thereof, and pass the data processing module
- the wireless communication method sends the road defect information and the lane direction function flag to the remote server, and dynamically updates and supplements the map data in real time.
- a sensor module is further included for detecting acceleration in three orthogonal directions during running of the vehicle, and judging the degree of bumpiness of the road by the magnitude of the acceleration, obtaining road bump data; and transmitting road bump data to the lane
- the defect detecting module, the lane defect detecting module outputs the road defect information according to the road bump data and the grayscale image in the defect detection ROI region.
- the device further includes a positioning module for acquiring latitude and longitude information of the vehicle position in real time.
- the device further includes a storage module for buffering data of each module and road image data, and a transmission module for communicating with the remote server.
- the invention provides a map road marking and road quality collecting method based on an ADAS system, which comprises the following steps:
- the area that does not conform to the normal road surface texture is selected as the lane area with defects, and sample training is performed on these areas to identify road defects;
- step S4 further includes: acquiring acceleration information of three forward directions of the vehicle as lane bump information in real time, evaluating the lane quality by combining the result of the road defect recognition and the lane bump information, and outputting the lane quality evaluation and the position information thereof;
- step S1 is:
- S15 Perform primary selection on the lane line according to a priori condition of the lane line, including a length, a width, a color of the lane line, a turning radius and a width of the lane curve;
- step S2 is:
- step S3 is:
- step S4 is:
- S42 Perform sample training on the defective lane area, obtain a classifier, and identify a road defect
- step S45 Select a feature point in the region according to the lane region where the quality defect is determined according to step S44, calculate coordinates of the region in combination with the positioning data, and determine position information in the world coordinate;
- the beneficial effects produced by the invention are: the ADAS system-based map road marking and road quality collecting device and method, the popularized, low-cost, timely and updated map road marking collection scheme; the replacement laser scanning vehicle contour
- the cost and update data are not timely, the cost is relatively low, and the update is timely, and there is no need for special collection vehicles and special operations; the road marking and road quality are collected at the same time, greatly improving efficiency and reducing costs.
- FIG. 1 is a schematic structural view of a device according to an embodiment of the present invention.
- FIG. 3 is a flow chart of lane line detection according to an embodiment of the present invention.
- FIG. 5 is a flowchart of lane indication mark detection according to an embodiment of the present invention.
- FIG. 6 is a block diagram of lane defect detection according to an embodiment of the present invention.
- A1-visual image module A2-high-precision positioning module, A3-multi-axis accelerometer, A4- arithmetic unit, A41-multi-thread processor CPU, A42-parallel acceleration unit, A6-communication module, A7-storage Module, A8-display output module, 101-image acquisition module, 102-image pre-processing module, 103-ADAS module, 13A-other ADAS function module, 13B-lane line detection module, 104-sensor module, 105-lane indicator Detection module, 106-lane line position calculation module, 107-lane defect detection module, 108-data processing module, 109-storage module, 110-transmission module.
- the map road marking and road quality collecting device based on the ADAS system of the embodiment of the present invention includes the following modules:
- the image acquisition module is configured to acquire a color image in front of the traveling vehicle in real time; the image acquisition module is a monocular camera.
- An image preprocessing module for converting a color image into a grayscale image
- the ADAS module is used to identify the vehicle, pedestrian and obstacle areas in the grayscale image, and to perform lane line detection on the grayscale image, to output the feature point set of the lane line in the image, the line equation and its lane region in the image. ;
- the lane line position calculation module is configured to inversely transform the feature point set of the lane line to the physical world coordinate system coordinate centered on the camera, perform curve fitting on the feature point after transforming the coordinate system, and calculate lane line position information;
- a lane indicator detection module for detecting a lane direction function mark in the lane area, including a straight line, a left turn, a right turn, a turn head, and a straight left turn mark;
- the sensor module is configured to detect the acceleration in three orthogonal directions during the running of the vehicle, and determine the degree of bumpiness of the road by the magnitude of the acceleration to obtain road bump data;
- the lane defect detection module is configured to exclude the identified vehicle, pedestrian and obstacle areas in each lane area, obtain a defect detection ROI area, and detect a defect detection ROI according to the road bump data and the gray image in the defect detection ROI area. Whether there are road defects in the area, identifying the type of defects and evaluating the quality of the road;
- the data processing module is configured to extract corresponding road defect information, including defect type, road quality, position information, and original image information, in the region where the road defect exists, and extract the identified lane direction function mark and corresponding position information thereof, and pass the data processing module
- the wireless communication method sends the road defect information and the lane direction function flag to the remote server, and dynamically updates and supplements the map data in real time.
- the apparatus of the invention is implemented by the following components:
- Visual image module A1 real-time acquisition of image sequences by a monocular camera
- High-precision positioning module A2 for real-time and accurate acquisition of latitude and longitude information of vehicle position
- Multi-axis acceleration sensor A3 used to determine the motion data of the vehicle including the traveling direction and the driving acceleration (speed);
- Arithmetic unit A4 Input for comprehensively processing image information and motion information, and obtaining road markings and road quality outputs for high-precision maps.
- the component of the arithmetic unit A4 is multi-threaded by the CPU A41: the core arithmetic processing unit;
- the component parallel expansion unit A42 of the arithmetic unit A4 accelerates the operation of the multi-thread processing CPU A41 to improve the operation efficiency to meet the real-time performance of the high-precision map output;
- Communication module A6 The output result of each function module is transmitted to the server, and the data can be obtained from the server to supplement the lack and deficiency of the high-precision map output result information;
- Storage module A7 used for cache of high-precision map data
- Display output module A8 The collected lane line position information, lane indication mark, road defect and other information are transmitted to the remote server through the 2G/3G/4G signal.
- the present invention can realize functions including lane markings and positions, road defects, and the like, and the functional modules are composed as shown in FIG. 2 .
- the image acquisition module 101 is a monocular vision camera, and acquires a visual color picture in front of the vehicle in real time.
- the image preprocessing module 102 converts the color picture acquired by the image acquisition module 101 into a gray image to reduce the calculation dimension to improve the real-time efficiency of the operation.
- ADAS module 103 Other ADAS function module 13A recognizes obstacles such as vehicles and pedestrians in front, and the module outputs an area where obstacles are in the image. This part is not the focus of the present invention and will not be described in detail.
- the lane line detection module 13B detects the lane line, outputs a feature point set of the lane line in the image, a straight line equation, and its lane area in the image.
- the sensor module 104 a three-axis acceleration sensor detects the acceleration in three orthogonal directions during the running of the vehicle, and can determine the degree of bumpiness of the road surface.
- the lane indicator detecting module 105 detects a lane direction function and the like in the lane, such as a straight line, a left turn, a right turn, a U-turn, a straight turn, and the like.
- the lane line position calculation module 106 transforms the lane line feature points output by the lane line detection module 13B into a physical world coordinate system coordinate centered on the camera, and performs curve fitting on the feature points after the transformation coordinate system, and can calculate The physical distance of the lane line.
- the lane defect detection module 107 in the lane area output by the lane line detection module 13B, excludes the vehicle, the obstacle, and the like detected by the other ADAS function module 13A, and obtains the defect detection ROI area, and detects whether or not the defect detection ROI area is in the picture.
- There are road defects detecting grayscale images in the ROI area based on road bump data and defect detection, detecting whether there are road defects in the ROI area of the defect detection, identifying the defect type and evaluating the road quality.
- the data processing module 108 synthesizes and filters information such as lane line position information, lane indication marks, road defects, and the like, and performs transmission or buffering.
- the storage module 109 caches each module data; image video and the like.
- the transmission module 110 transmits the collected lane line position information, the lane indication mark, the road defect and the like to the remote server through the 2G/3G/4G signal, and exchanges other data.
- step S1 The specific method of step S1 is:
- S15 Perform primary selection on the lane line according to a priori condition of the lane line, including a length, a width, a color of the lane line, a turning radius and a width of the lane curve;
- step S2 The specific method of step S2 is:
- step S3 The specific method of step S3 is:
- the area that does not conform to the normal road surface texture is selected as the lane area with defects, and sample training is performed on these areas to identify road defects; the three-axis acceleration information of the vehicle is acquired in real time as the lane bump.
- step S4 The specific method of step S4 is:
- S42 Perform sample training on the defective lane area, obtain a classifier, and identify a road defect
- step S45 Select a feature point in the region according to the lane region where the quality defect is determined according to step S44, calculate coordinates of the region in combination with the positioning data, and determine position information in the world coordinate;
- the method includes the following steps:
- Step 01 Acquire an image sequence containing road information in real time
- Step 02 performing grayscale processing on the color image
- Step 03 Perform binarization processing on the grayscale image to obtain a binarization map including rich lane line information
- Step 04 Perform image segmentation on the binarization map, such as a hough transform to extract a line, and extract a lane line pixel point;
- Step 05 According to the a priori condition of the lane line, the length, the width, the color of the straight line, the curve turning radius, the width, etc., the lane line is initially selected;
- Step 06 Calculate the gradient value of the lane line edge (the gray level difference between the foreground pixel and the road background), the edge uniformity, the number of pixels, etc. as the lane line confidence parameter, and further refine the processing of the lane line based on the confidence level. As a result, a more accurate lane line extraction result is obtained;
- Step 07 The detection result of the output lane line and the area where it is located provide data support for the lane line related functions, lane coordinates, and road defects.
- the implementation steps of implementing the lane GPS position output function are as follows:
- Step 08 The pixel coordinates of the feature points of the lane line are converted to the world coordinates by a perspective transformation method
- Step 09 performing curve fitting on the feature points of the lane lines in the world coordinates to obtain a curve equation of the lane lines;
- Step 10 According to the world coordinates and curve equation, give the position of the lane in the world coordinates;
- Step 11 Combine GPS data to locate the lane position.
- the steps of implementing lane marking detection are as follows:
- Step 12 Extract road marking texture features according to the image sequence
- Step 13 Determine the lane area according to step 7, and combine the texture feature of step 12 to initially identify the indicator mark;
- Step 14 selecting a recognition result that is a final indicator mark with a higher weight according to the preliminary selection result of the lane indication mark of step 13;
- Step 15 Based on the lane indication mark determined in step 14, selecting a feature point and calculating coordinates of the lane indication mark in combination with the positioning data, thereby determining a position of the indication mark in world coordinates;
- Step 16 Output lane indication mark position information.
- the detection of the lane quality can be realized, and the specific implementation steps are as follows:
- Step 17 According to step 12 and step 7, the area that does not conform to the normal road surface texture is selected as the lane area with defects;
- Step 18 Based on the possible result of the road defect area in step 17, the resulting sample trainer is used to identify the road defect;
- Step 19 synchronously collect the vertical component data of the acceleration sensor A3, and record the acceleration moment where the large jitter occurs, as the judgment basis of the lane bump;
- Step 20 comprehensively consider the recognition results of steps 18 and 19 to determine whether there is a quality defect in the lane;
- Step 21 selecting a feature point in the region based on the region with the quality defect determined in step 20, and calculating coordinates of the region in combination with the positioning data to determine position information in the world coordinate;
- Step 22 Output the defect result, which is sent to the server through the transmission module 110 for driving navigation.
- This solution is integrated with the ADAS function.
- the cost of the ADAS device is relatively low, and the popularity is higher and higher. It can be installed and used in any ordinary vehicle. Realize the dynamic real-time update of map data while enhancing driving safety during daily normal driving process, and simultaneously collect map data data and lane quality collection, greatly improve efficiency and reduce efficiency under the premise of ensuring accuracy and quality. cost.
- the basic algorithm of the high-precision positioning system used at present is the pattern recognition algorithm, but with the improvement of computer computing performance and the improvement of the deep learning algorithm, the functions involved in the present invention can all pass the deep learning algorithm, namely CNN (convolution neural network). ), identification of lane indication marks, lane lines, street signs (speed limit cards, forbidden signs, and other road information indication marks, etc.).
- CNN convolution neural network
- identification of lane indication marks, lane lines, street signs speed limit cards, forbidden signs, and other road information indication marks, etc.
- High-precision road marking data acquisition method that is easy to popularize, low-cost, and timely update data, used to update high-precision map data in real time.
- the road position accuracy can be achieved to reach the 10CM level.
- Width lane marking width
- Type single solid line, dotted line, double line
- Lane driving direction straight line, left turn, right turn, turn around and other identification classification and quality evaluation.
- Guidance information for road maintenance can also be used as a supplement to map data to provide user-friendly forecasting tips.
- a scene such as a pre-alert may be pre-empted before entering a road with poor road quality.
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Abstract
Description
Claims (10)
- 一种基于ADAS系统的地图道路标记及道路质量采集装置,其特征在于,包括以下模块:图像采集模块,用于实时获取行驶车辆前方的彩色图像;图像预处理模块,用于将彩色图像转换为灰度图像;ADAS模块,用于识别灰度图像中的车辆、行人和障碍物区域,并对灰度图像进行车道线检测,输出车道线在图像中的特征点集合、直线方程以及其在图像中的车道区域;车道线位置计算模块,用于将车道线的特征点集合进行逆透视变换至以摄像机为中心的物理世界坐标系坐标,对变换坐标系后特征点进行曲线拟合,计算出车道线位置信息;车道指示标记检测模块,用于检测车道区域内的车道方向功能标记,包括直行、左转、右转、调头和直行左转标记;车道缺陷检测模块,用于在各车道区域内,排除识别出的车辆、行人和障碍物区域,得到缺陷检测ROI区域,根据缺陷检测ROI区域内的灰度图像,检测缺陷检测ROI区域内是否存在道路缺陷,识别缺陷类型并评价道路质量;数据处理模块,用于对存在道路缺陷的区域,提取出对应的道路缺陷信息,包括缺陷类型、道路质量、位置信息以及原始图像信息;提取识别到的车道方向功能标记及其对应位置信息,通过无线通信的方式将道路缺陷信息和车道方向功能标记发送至远程服务器,对地图数据进行实时动态更新和补充。
- 根据权利要求1所述的基于ADAS系统的地图道路标记及道路质量采集装置,其特征在于,还包括传感器模块,用于检测车辆行驶过程中的在三个正交方向的加速度大小,并通过加速度大小对路面颠簸程度进行判断,得到道路颠簸数据;并将道路颠簸数据发送给车道缺陷检测模块,车道缺陷检测模块根据道路颠簸数据和缺陷检测ROI区域内的灰度图像,输出道路缺陷信息。
- 根据权利要求1或2所述的基于ADAS系统的地图道路标记及道路质量采集装置,其特征在于,该装置还包括定位模块,用于实时获取车辆位置的经纬度信息。
- 根据权利要求1或2所述的基于ADAS系统的地图道路标记及道路质量采集装置,其特征在于,该装置还包括存储模块和传输模块,存储模块用于缓存各个模块的数据以及道路图像数据;传输模块用于与远程服务器进行通信。
- 一种基于ADAS系统的地图道路标记及道路质量采集方法,其特征在于,包括以下步骤:S1、实时获取车辆行进中的道路彩色图像,将其处理为灰度图像,车载ADAS系统根据灰度图像提取车道线和车道区域;S2、提取车道线的特征点图像坐标,将其转换为世界坐标,并实时获取车辆行驶的位置信息,得到车道线的位置信息;S3、提取灰度图像中的道路纹理特征,对车道区域内的车道指示标记进行纹理识别,输出车道指示标记及其位置信息;S4、根据车道区域内的道路纹理特征,初选出不符合正常路面纹理的区域作为存在缺陷的车道区域,对这些区域进行样本训练,识别道路缺陷;S5、根据步骤S3和步骤S4的输出结果,实时更新和补充地图数据。
- 根据权利要求5所述的基于ADAS系统的地图道路标记及道路质量采集方法,其特征在于,步骤S4还包括:实时获取车辆的三个正向方向的加速度信息作为车道颠簸信息,结合道路缺陷识别的结果和车道颠簸信息对车道质量进行评价,输出车道质量评价及其位置信息;
- 根据权利要求5或6所述的基于ADAS系统的地图道路标记及道路质量采集方法,其特征在于,步骤S1的具体方法为:S11、实时获取车辆行进中的道路彩色图像;S12、将彩色图像处理为灰度图像;S13、将灰度图像进行二值化处理得到包含车道线信息的二值化图;S14、对二值化图进行图像分割,采用hough变换提取直线的方法,提取车道线像素点;S15、根据车道线先验条件,包括车道直线的长度、宽度、颜色,车道曲线转弯半径、宽度,对车道线进行初选;S16、计算车道线边缘梯度值,即前景像素与道路背景的灰度差值,边缘整齐度以及像素数,综合做为车道线置信度参数,根据置信度进一步精细化处理车道线的初选结果,得到更为精确的车道线提取结果;S17、输出车道线以及车道区域。
- 根据权利要求5或6所述的基于ADAS系统的地图道路标记及道路质量采集方法,其特征在于,步骤S2的具体方法为:S21、提取车道线的特征点图像坐标,通过透视变换方法,转换到世界坐标;S22、对世界坐标下车道线的特征点进行曲线拟合,得到车道线的曲线方程;S23、根据世界坐标及曲线方程,给出车道线在世界坐标下的位置;S24、实时获取车辆行驶的位置信息,定位车道位置。
- 根据权利要求5或6所述的基于ADAS系统的地图道路标记及道路质量采集方法,其特征在于,步骤S3的具体方法为:S31、提取车道灰度图像中的道路纹理特征;S32、根据车道区域和道路纹理特征,初步识别指示标记;S33、根据车道指示标记的初选结果,选择权重较高的作为最终指示标记的识别结果;S34、根据车道的最终指示标记的识别结果,选取特征点并结合定位数据计算车道指示标记的坐标,从而确定指示标记在世界坐标下的位置;S35、输出车道指示标记及其位置信息。
- 根据权利要求6所述的基于ADAS系统的地图道路标记及道路质量采集方法,其特征在于,步骤S4的具体方法为:S41、提取车道灰度图像中的道路纹理特征,根据车道区域内的道路纹理特征,初选出不符合正常路面纹理的区域作为存在缺陷的车道区域;S42、对存在缺陷的车道区域进行样本训练,得到分类器,识别道路缺陷;S43、实时采集车辆的三轴加速度信息,将竖向加速度分量作为车道颠簸信息,记录出现较大跳动的加速度时刻,作为车道颠簸的判断依据;S44、结合道路缺陷识别的结果和车道颠簸信息对车道质量进行评价,确定存在质量缺陷的车道区域;S45、根据步骤S44确定的存在质量缺陷的车道区域,选择区域中的特征点,结合定位数据计算该区域的坐标,确定其在世界坐标下的位置信息;S46、输出车道缺陷结果及其位置信息。
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