CN-115808128-B - Urban road width and cross section arrangement form measuring system and method

CN115808128BCN 115808128 BCN115808128 BCN 115808128BCN-115808128-B

Abstract

The invention discloses a system and a method for measuring urban Road width and cross section arrangement form, which are used for dividing Road original images, calculating the total Road width by the divided Road areas, marking the divided Road areas, extracting image features in the divided Road areas, identifying corresponding Road types, classifying roads according to Road area field values and Road type field values, and judging the Road cross section arrangement form according to road_sort field values of M0 areas and field values of W Side dividing belt L and W Side dividing belt R . The invention efficiently and safely realizes the measurement of the width and the cross section arrangement form of the urban wide-range road.

Inventors

JING PENG
WANG WEICHAO
LIU YAQI
Ming Baixu
SUN HUIQIAN

Assignees

江苏大学

Dates

Publication Date: 20260512
Application Date: 20221208

Claims (6)

1. A method for measuring the width and the cross section arrangement form of an urban road is characterized by comprising the following steps: Road area segmentation is carried out on the original image of the road, and the total width of the road is obtained by calculating the segmented road area; Marking the divided road area, wherein the marking field values are "M0 area", "L1 area", "R1 area", "L2 area", "R2 area", "L3 area", "R3 area", "L4 area" and "R4 area"; extracting image features in the divided road areas and identifying corresponding road types, wherein field values of the road types comprise barrier rails, green belts, motor lanes, non-motor lanes and sidewalks; The road classification is carried out according to the road area field value and the road type field value, wherein the classified field values comprise a middle zoning zone, a soft isolation zone, a motor vehicle lane L, a motor vehicle lane R, a side zoning zone L, a side zoning zone R, a non-motor vehicle lane L, a non-motor vehicle lane R, a sidewalk L and a sidewalk R; Judging the road cross section arrangement form according to the road classification field value of the M0 area and the field values of W Side dividing belt L and W Side dividing belt R : If the road in the M0 area is classified as a soft isolation zone, judging whether W Side dividing belt L 、W Side dividing belt R is zero, and if W Side dividing belt L =0 and W Side dividing belt R =0, judging that the road cross section arrangement form is a single road; If the road in the M0 area is classified as "zonal", judging whether W Side dividing belt L 、W Side dividing belt R is zero, and if W Side dividing belt L =0 and W Side dividing belt R =0, judging that the road cross section arrangement form is "double-width road"; If the road in the M0 area is classified as a middle belt, judging whether W Side dividing belt L 、W Side dividing belt R is zero, and if W Side dividing belt L =0 and W Side dividing belt R is not equal to 0, judging that the road cross section arrangement form is a three-width road; If the road in the M0 area is classified as a middle-split road, judging whether W Side dividing belt L 、W Side dividing belt R is zero, and if W Side dividing belt L is not equal to 0 and W Side dividing belt R =0, judging that the road cross section arrangement form is a three-road; If the road in the M0 area is classified as a middle-branch road, judging whether W Side dividing belt L 、W Side dividing belt R is zero, if W Side dividing belt L is not equal to 0 and W Side dividing belt R is not equal to 0, judging that the road cross section arrangement form is a four-frame road, wherein the W Side dividing belt L and the W Side dividing belt R specifically comprise newly built W Side dividing belt L and W Side dividing belt R fields, and assigning actual road width values of areas corresponding to the side-branch road L and the side-branch road R to W Side dividing belt L and W Side dividing belt R fields according to road classification field values to obtain W Side dividing belt L and W Side dividing belt R ; The original image of the road is obtained by shooting the unmanned aerial vehicle flying right above the road; the road region segmentation is to firstly laminate a boundary map to an original road map layer, then utilize a cutting function of an extraction analysis tool in Arcmap software to segment the road region of the laminated map layer, and further comprise road boundary extraction, wherein the road boundary extraction is to extract road boundaries of a middle-split zone, a motor vehicle lane, a side-split zone, a non-motor vehicle lane and a sidewalk in the original road image by using a Canny edge detection algorithm, and store the boundary map layer established in the Arcmap software.
2. The urban road width and cross-sectional layout form measurement method according to claim 1, characterized in that said road classification is in particular: if the road type field value of the M0 area is 'green belt' or 'isolation railing', the road classification field value of the M0 area is assigned as 'middle belt', and if the road type field value of the M0 area is 'motor vehicle lane', the road classification field value is assigned as 'soft isolation belt'; if the road type field value of the R1 area is "motor vehicle lane", the road classification field value is assigned as "motor vehicle lane R"; If the road type field value of the R2 area is a green belt, the road classification field value is assigned as a side belt R, if the road type of the R2 area field value is a non-motor vehicle lane, the road classification field value of the area is assigned as a non-motor vehicle lane R, and if the road type field value of the R2 area is a sidewalk, the road classification field value of the area is assigned as a sidewalk R; If the road type field value of the R3 area is 'non-motor vehicle lane', the road classification field value of the area is assigned to 'non-motor vehicle lane R', and if the road type field value of the R3 area is 'sidewalk', the road classification field value of the area is assigned to 'sidewalk R'; if the R4 regional road type field value is 'sidewalk', the regional road classification field value is assigned to be 'sidewalk R'; if the road type field value of the L1 area is "motor vehicle lane", the road classification field value is assigned as "motor vehicle lane L"; if the road type field value of the L2 area is a green belt, the road classification field value is assigned as a side belt L, if the road type field value of the L2 area is a non-motor vehicle lane, the road classification field value of the area is assigned as a non-motor vehicle lane L, and if the road type field value of the L2 area is a sidewalk, the road classification field value of the area is assigned as a sidewalk L; if the road type field value of the L3 area is 'non-motor vehicle lane', the road classification field value of the area is assigned to 'non-motor vehicle lane R', and if the road type field value of the L3 area is 'sidewalk', the road classification field value of the area is assigned to 'sidewalk L'; if the L4 regional road type field value is "sidewalk", the regional road classification field value is assigned to "sidewalk L".
3. The urban road width and cross-sectional layout form measuring method according to claim 1, wherein the road total width Wherein Is the actual width of the road, and Where m is the aerial image scale and W i is the road width for each region.
4. The method for measuring urban road width and cross section arrangement form according to claim 3, wherein the road width obtaining method for each region comprises the steps of sequentially selecting edges of the road region segmentation layer from left to right, taking the selected edges as basic edges and the adjacent right edges as calculation edges, taking the midpoint of the basic edges as calculation base points, traversing the distance between the base points and pixel points on the right adjacent calculation edges, and taking the minimum value as the road width of each region.
5. A system for implementing the urban road width and cross-sectional layout form measuring method according to any one of claims 1-4, comprising: The image processing module is used for acquiring an original image of the road shot by the unmanned aerial vehicle and dividing the road area of the original image of the road; the road area marking module marks the divided road area; The road type identification module is used for extracting image features in the segmented road areas and identifying corresponding road types; the road classification module is used for classifying roads according to the road area field value and the road type field value; The road width calculation module is used for calculating the total road width according to the divided road areas; And the road cross section arrangement form judging module judges the road cross section arrangement form according to the road classification field value of the M0 area and W Side dividing belt L and W Side dividing belt R .
6. The system of claim 5, wherein the image processing module further performs road boundary extraction on the original image of the road.

Description

Urban road width and cross section arrangement form measuring system and method Technical Field The invention belongs to the technical field of urban road measurement, and particularly relates to an urban road width and cross section arrangement form measurement system and method based on unmanned aerial vehicle aerial images. Background At present, urban roads in China mainly comprise motor vehicle lanes, non-motor vehicle lanes, sidewalks, middle zonal belts and side zonal belt parts. The width of each component part of the road and the road cross section arrangement form are taken as important parameters of urban road planning and road construction, and have important significance on road smoothness and road safety. The measurement and statistics of the road width and the cross section arrangement form are basic information and important attributes in the investigation of the current situation of the urban road network, and have important reference values for urban road network reconstruction and urban road planning. Existing measurements on road width and road cross section are mostly measured and observed manually by hand. For road width measurement, whether the measurement is performed by using a traditional ruler or a distance measuring device such as a laser distance meter, the traffic of a measurement road section is generally limited due to the consideration of the safety of measurement personnel, the measurement efficiency and other factors, and the road traffic operation is greatly influenced. In recent years, a method for measuring the road width by using a laser ranging device and an image acquisition device carried by a vehicle appears, but the urban road traffic condition is complex, the vehicle-mounted laser ranging device and the image acquisition device are easy to be blocked by vehicles coming and going and parking at the road side and greening vegetation, the measuring efficiency and the integrity of the measuring road range cannot be ensured, and the accuracy of road width measurement is affected. The measurement of the road cross section arrangement form only depends on manual observation at present, and a corresponding automatic identification and statistics method is lacked, so that the measurement efficiency of the manual observation mode is very low when the road cross section measurement and statistics are performed in a large range of cities. Disclosure of Invention Aiming at the defects in the prior art, the invention provides a system and a method for measuring the width and the cross section arrangement form of an urban road based on an aerial image of an unmanned aerial vehicle, which improve the measurement efficiency and the measurement safety of the width and the cross section arrangement form of the urban road in a large range. The present invention achieves the above technical object by the following means. A measuring method for urban road width and cross section arrangement forms comprises the following steps: Road area segmentation is carried out on the original image of the road, and the total width of the road is obtained by calculating the segmented road area; Marking the divided road area, wherein the marking field values are "M0 area", "L1 area", "R1 area", "L2 area", "R2 area", "L3 area", "R3 area", "L4 area" and "R4 area"; extracting image features in the divided road areas and identifying corresponding road types, wherein field values of the road types comprise barrier rails, green belts, motor lanes, non-motor lanes and sidewalks; The road classification is carried out according to the road area field value and the road type field value, wherein the classified field values comprise a middle zoning zone, a soft isolation zone, a motor vehicle lane L, a motor vehicle lane R, a side zoning zone L, a side zoning zone R, a non-motor vehicle lane L, a non-motor vehicle lane R, a sidewalk L and a sidewalk R; judging the Road cross section arrangement form according to the road_sort field value of the M0 area and the field values of W Side dividing belt L and W Side dividing belt R: If the road in the M0 area is classified as a soft isolation zone, judging whether W Side dividing belt L、W Side dividing belt R is zero, and if W Side dividing belt L =0 and W Side dividing belt R =0, judging that the road cross section arrangement form is a single road; If the road in the M0 area is classified as "zonal", judging whether W Side dividing belt L、W Side dividing belt R is zero, and if W Side dividing belt L =0 and W Side dividing belt R =0, judging that the road cross section arrangement form is "double-width road"; If the road in the M0 area is classified as a middle belt, judging whether W Side dividing belt L、W Side dividing belt R is zero, and if W Side dividing belt L =0 and W Side dividing belt R is not equal to 0, judging that the road cross section arrangement form is a three-width road; If the road in the M0 area is classified as a middle-split road, j