Land parcel information updating method, device, electronic device and storage medium

Abstract

The present invention relates to the field of information technology, and provides a method, device, electronic device and storage medium for updating plot information. The method comprises: obtaining a digital orthophoto map and a drone image of a plot to be updated, wherein the digital orthophoto map comprises a first boundary of the plot to be updated in the digital orthophoto map; determining reference feature points in an external graphic of the first boundary and registration feature points in the drone image corresponding to the reference feature points; and updating the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points. The present invention uses low-cost drone images to update the plot information of the plot to be updated in the digital orthophoto map, thereby greatly reducing the updating cost of the digital orthophoto map.

Description

Technical Field

[0001] The present invention relates to the field of information technology, and in particular to a method, device, electronic device and storage medium for updating plot information. Background Art

[0002] Digital Orthophoto Map (DOM) is an image plane map (with added coordinate grid, line drawing elements, text annotations, etc.) formed by a series of processing such as pixel correction and photo mosaicking on a computer using photos taken by close-range aerial photogrammetry. DOM is rich in information and easy to understand. It is usually used for large-scale maps of cities and surrounding areas. However, the updating cost of DOM is relatively high.

[0003] When the DOM is used to manage the plot information, once the plot information changes, the plot information in the DOM needs to be updated. Since the update cost of the DOM is high, the cost of updating the plot information in the DOM is also high. Summary of the invention

[0004] The object of the present invention is to provide a method, device, electronic device and storage medium for updating plot information, which can reduce the cost of updating plot information in DOM.

[0005] In order to achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0006] In a first aspect, an embodiment of the present invention provides a method for updating land parcel information, the method comprising:

[0007] Acquire a digital orthophoto map and a drone image of the land parcel to be updated, wherein the digital orthophoto map includes a first boundary of the land parcel to be updated in the digital orthophoto map;

[0008] Determine reference feature points within the circumscribed graph of the first boundary and registration feature points in the drone image corresponding to the reference feature points;

[0009] The plot information of the plot to be updated in the digital orthophoto map is updated according to the reference feature points and the registration feature points.

[0010] Furthermore, the step of determining the reference feature points in the circumscribed graph of the first boundary and the registration feature points in the drone image corresponding to the reference feature points includes:

[0011] Determine a first reference point in a first circumscribed figure, wherein the first circumscribed figure is a minimum figure in the circumscribed figures;

[0012] Based on the first reference point, determining a second reference point, wherein the first boundary is within a closed area formed by the second reference point;

[0013] Based on the second reference point, the reference feature point and the registration feature point are determined.

[0014] Further, the step of determining the second reference point based on the first reference point includes:

[0015] If the first boundary is within a closed area formed by the first reference points, the first reference point is used as the second reference point;

[0016] If the first boundary is not within the closed area formed by the first reference points, the first circumscribed figure is enlarged, and the first circumscribed figure is replaced by the enlarged first circumscribed figure, and the first reference point is replaced by the first reference point in the enlarged first circumscribed figure, until the first boundary is within the closed area formed by the first reference points, and the first reference point corresponding to the closed area where the first boundary is located is used as the second reference point.

[0017] Furthermore, the step of determining the reference feature point and the registration feature point based on the second reference point includes:

[0018] Determining a first initial registration point in the drone image corresponding to the second reference point;

[0019] Registering the drone image according to a second reference point and the first initial registration point;

[0020] Extracting a second boundary of the land parcel to be updated in the registered UAV image;

[0021] If the second boundary is within a closed area formed by the first initial registration points corresponding to the second reference point, the second reference point is used as the reference feature point, and the first initial registration point is used as the registration feature point;

[0022] If the second boundary is not within the closed area formed by the first initial registration points corresponding to the second reference point, the second circumscribed figure corresponding to the second reference point is enlarged, and the second reference point is re-determined based on the first reference point in the second circumscribed figure, and the above steps are repeated until the second boundary is within the closed area formed by the first initial registration points corresponding to the second reference point.

[0023] Furthermore, the step of determining the first reference point in the first circumscribed graph includes:

[0024] If there is a corner point in the first circumscribed graphic, the corner point is used as the first reference point.

[0025] Furthermore, the first boundary includes a plurality of edges, and the step of determining the first reference point in the first circumscribed graph further includes:

[0026] Performing boundary fitting on each of the multiple edges to obtain a boundary fitting line of each edge;

[0027] If the intersection point of the two intersecting boundary fitting lines is within the first circumscribed figure, the intersection point is used as the first reference point.

[0028] Furthermore, the plot information includes a plot image, and the step of updating the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points includes:

[0029] Taking a closed area formed by connecting the reference feature points as a first area;

[0030] Taking the closed area formed by connecting the registration feature points as the second area;

[0031] The plot image of the first area is replaced by the plot image of the second area, so as to update the plot image of the plot to be updated in the digital orthophoto map.

[0032] Furthermore, the plot information further includes crop categories, a closed area formed by connecting the reference feature points is used as a first area, and a closed area formed by connecting the registration feature points is used as a second area, and the step of updating the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points further includes:

[0033] Acquire a first crop category of the first area;

[0034] determining a second crop category for the second region;

[0035] The first crop category is replaced by the second crop category to update the crop category of the to-be-updated plot in the digital orthophoto map.

[0036] In a second aspect, an embodiment of the present invention further provides a device for updating plot information, the device comprising:

[0037] An acquisition module, used for acquiring a digital orthophoto map and a drone image of the land parcel to be updated, wherein the digital orthophoto map includes a first boundary of the land parcel to be updated in the digital orthophoto map;

[0038] A determination module, configured to determine reference feature points within a circumscribed graph of the first boundary and registration feature points in the drone image corresponding to the reference feature points;

[0039] An updating module is used to update the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points.

[0040] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0041] one or more processors;

[0042] The memory is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the land parcel information updating method of the first aspect.

[0043] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the land parcel information updating method of the first aspect.

[0044] Compared with the prior art, the embodiments of the present invention provide a method, device, electronic device and storage medium for updating plot information. First, a digital orthophoto image and a drone image of the plot to be updated are obtained. Then, reference feature points within the circumscribed graphics of the first boundary of the plot to be updated in the digital orthophoto image and registration feature points corresponding to the reference feature points in the drone image are determined. Finally, according to the reference feature points and the registration feature points, the plot information of the plot to be updated in the digital orthophoto image is updated. The embodiments of the present invention use low-cost drone images to update the plot information of the plot to be updated in the digital orthophoto image, thereby greatly reducing the updating cost of the digital orthophoto image. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A schematic flow chart of a method for updating plot information provided by an embodiment of the present invention is shown.

[0047] Figure 2 An example diagram of a drone image and a plot to be updated therein provided by an embodiment of the present invention is shown.

[0048] Figure 3 An example diagram of a minimum external graph and an expanded graph provided by an embodiment of the present invention is shown.

[0049] Figure 4 for Figure 1 A flow chart of step 102 in the plot information updating method is shown.

[0050] Figure 5 An example diagram of boundary fitting provided by an embodiment of the present invention is shown.

[0051] Figure 6 An example diagram showing a first boundary provided by an embodiment of the present invention being within a closed area formed by reference points is shown.

[0052] Figure 7 for Figure 1 A flowchart diagram of step 103 in the plot information updating method is shown.

[0053] Figure 8 for Figure 1 Another flowchart diagram of step 103 in the plot information updating method is shown.

[0054] Fig. 9 A block diagram of a plot information updating device provided in an embodiment of the present application is shown.

[0055] Fig.10 A block diagram of an electronic device provided in an embodiment of the present application is shown.

[0056] Icons: 10 - electronic device; 11 - processor; 12 - memory; 13 - bus; 100 - plot information updating device; 110 - acquisition module; 120 - determination module; 130 - updating module. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0060] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0062] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0063] Farmland area data is the basis for precise agricultural management of farmland areas, and timely and effective updating of farmland area data is an indispensable link. If the DOM must be re-photographed every time the farmland area data is updated, and the latest DOM is used to update the old DOM, the update cost is high.

[0064] In order to reduce the update cost, the existing technology uses low-cost satellite images to update the DOM. However, this method has new problems. On the one hand, farmland area data usually includes multiple plots, some of which do not change throughout the year. These plots do not actually need to be updated frequently. On the other hand, the resolution of satellite images is low and cannot meet the update of plot-level data of farmland area data.

[0065] In view of this, an embodiment of the present invention provides a plot information updating method, device, electronic device and storage medium, which can implement the updating of plot-level data, and will be described in detail below.

[0066] Please refer to Figure 1 , Figure 1 A schematic diagram of a flow chart of a method for updating plot information provided by an embodiment of the present invention is shown, and the method comprises the following steps:

[0067] Step S101: obtaining a digital orthophoto map and a drone image of the land parcel to be updated, wherein the digital orthophoto map includes a first boundary of the land parcel to be updated in the digital orthophoto map.

[0068] In this embodiment, the plots to be updated can be determined by the change spots in the satellite image, or can be determined manually. Taking satellite images as an example, firstly, two satellite images of different periods are obtained, and suspected change spots are found by using a preset image change detection algorithm or a known image change detection tool, and plots such as fruit trees and ponds that do not change throughout the year are excluded, and the plots corresponding to the remaining suspected change spots are used as the plots to be updated.

[0069] In this embodiment, after determining the land parcel to be updated, a drone can be used to photograph the land parcel to be updated to obtain a drone image of the land parcel to be updated. In order to include the complete land parcel to be updated in the drone image, the length of the drone image can be set to be a preset multiple of the length of the land parcel to be updated in the drone image. For example, the preset multiple is 3 times. Please refer to Figure 2 , Figure 2 An example diagram of a drone image and a plot to be updated therein provided by an embodiment of the present invention is shown. Figure 2 In the figure, the center position of the plot to be updated roughly coincides with the center position of the drone image, the plot to be updated is roughly a square, and the side length of the drone image is roughly 3 times the side length of the plot to be updated.

[0070] In this embodiment, in order to ensure that the length of the drone image is a preset multiple of the length of the plot to be updated, the drone route can be planned according to the preset points of interest in the plot to be updated. The preset points of interest can be the coordinates of the center point of the plot to be updated, or the coordinates of other preset points that are convenient for locating the plot to be updated. At the same time, the number of original images to be taken can be determined according to the size of the plot and the resolution of the shooting equipment. When the number of original images is multiple, the multiple original images can be spliced ​​to obtain the final drone image to ensure that the length of the drone image is a preset multiple of the length of the plot to be updated.

[0071] In this embodiment, as a specific application scenario, the digital orthophoto map can be taken at a historical time, and the drone image can be taken at the latest time. In this case, the first boundary is the boundary of the plot to be updated when the digital orthophoto map is taken, and the second boundary is the boundary of the plot to be updated when the drone image is taken. The second boundary may be different from the first boundary. As another specific application scenario, the digital orthophoto map and the drone image can be any two images taken at different time points. The method provided by the embodiment of the present invention can automatically and accurately determine the difference between the two.

[0072] Step S102, determining reference feature points in the circumscribed graph of the first boundary and registration feature points in the drone image corresponding to the reference feature points.

[0073] In this embodiment, the circumscribed figure may be a circle, a square, a rectangle, or other regular polygons. The circumscribed figure may include the minimum circumscribed figure of the first boundary and a figure that is concentric with the minimum circumscribed figure and is expanded once or multiple times according to a preset step length. Figure 3 , Figure 3 An example diagram of a minimum external graph and an expanded graph provided by an embodiment of the present invention is shown. Figure 3 In the figure, the circumscribed figure is a circle, the minimum circumscribed circle of plot A is circumscribed circle 1, the radius of circumscribed circle 1 is increased by a preset length to obtain circumscribed circle 2, the radius of circumscribed circle 2 is increased by a preset length to obtain circumscribed circle 3, and circumscribed circles 1, 2, and 3 are concentric circles. The reference feature point can be a point within the minimum circumscribed figure or a point not within the minimum circumscribed figure.

[0074] In this embodiment, the reference feature points and the registration feature points correspond to each other. The reference feature points are used to determine the plots to be updated in the digital orthophoto image, and the first boundary is within the closed area formed by the reference feature points. The registration feature points are used to determine the plots to be updated in the drone image, and the second boundary is within the closed area formed by the registration feature points.

[0075] Step S103, updating the land parcel information of the land parcel to be updated in the digital orthophoto map according to the reference feature points and the registration feature points.

[0076] In this embodiment, the land parcel information of the land parcel to be updated includes, but is not limited to, the boundary of the land parcel to be updated, the image of the land parcel to be updated, the crop category of the land parcel to be updated, and the like.

[0077] The method provided in this embodiment acquires the drone image of the plot to be updated, determines the reference feature points in the circumscribed graph of the DOM and the corresponding registration feature points in the drone image, and thus realizes the update of the plot-level plot information of the DOM.

[0078] exist Figure 1 Based on this, the embodiment of the present invention also provides a specific implementation method for determining reference feature points and registration feature points, please refer to Figure 4 , Figure 4 for Figure 1 A flow chart of step 102 in the plot information updating method is shown, where step S102 includes the following sub-steps:

[0079] Sub-step S1021 , determining a first reference point in a first circumscribed figure, wherein the first circumscribed figure is a minimum figure in the circumscribed figures.

[0080] In this embodiment, the first reference point may be a corner point in the first circumscribed figure, or an intersection point of two edges in the first circumscribed figure, or may include both a corner point and an intersection point. In the field of image analysis, there are at least two definitions: (1) a corner point may be a corner point of two edges; (2) a corner point is a feature point with two main directions in a neighborhood. For the identification of corner points, there are already mature identification algorithms in the prior art, which will not be described here. Since corner points are easy to identify, the shape or boundary of the plot to be updated can be accurately determined by using corner points.

[0081] In this embodiment, both the corner point and the intersection point can be one or more.

[0082] In this embodiment, as a specific implementation, the following steps may be used to determine the first reference point:

[0083] If there is a corner point in the first circumscribed figure, the corner point is used as the first reference point.

[0084] In this embodiment, in addition to the implementation method of using the identified corner point as the first reference point, it is difficult to determine the corner point of the arc-shaped edge in the to-be-identified land parcel. In this case, another method can be used to determine the first reference point. The specific steps are as follows:

[0085] First, boundary fitting is performed on each of the multiple edges to obtain a boundary fitting line for each edge.

[0086] In this embodiment, if the land parcel to be identified includes multiple arc-shaped edges, it is necessary to perform boundary fitting on both sides of each arc-shaped edge to obtain the corresponding boundary fitting line. Figure 5 , Figure 5 An example diagram of boundary fitting provided by an embodiment of the present invention is shown. Figure 5 In the figure, the plot B to be updated includes an arc-shaped edge, which is framed by a small square on the left. The two boundary fitting lines of the edge are as follows: Figure 5 As shown, the intersection point of the two boundary fitting lines is the intersection point S.

[0087] Secondly, if the intersection point of the two intersecting boundary fitting lines is within the first circumscribed figure, the intersection point is used as the first reference point.

[0088] Through the above two implementation methods, no matter whether there is a corner point in the block to be updated, the first reference point in the first circumscribed graph can be determined.

[0089] Sub-step S1022: determining a second reference point based on the first reference point, wherein the first boundary is within a closed area formed by the second reference point.

[0090] In this embodiment, the first boundary may be in a closed area formed by the first reference points. In this case, the first reference point is directly used as the second reference point. The first boundary may not be in the closed area formed by the first reference points. In this case, the second reference point needs to be determined based on the first reference point so that the first boundary is in the closed area formed by the second reference point. The specific implementation method is as follows:

[0091] First, if the first boundary is within a closed area formed by the first reference points, the first reference points are used as the second reference points.

[0092] Secondly, if the first boundary is not within the closed area formed by the first reference points, the first circumscribed figure is enlarged, and the first circumscribed figure is replaced by the enlarged first circumscribed figure, and the first reference point is replaced by the first reference point in the enlarged first circumscribed figure, until the first boundary is within the closed area formed by the first reference points, and the first reference point corresponding to the closed area where the first boundary is located is used as the second reference point.

[0093] In this embodiment, in order to more clearly illustrate the situation where the first boundary is within the closed area formed by the reference points, please refer to Figure 6 , Figure 6 An example diagram showing a first boundary provided by an embodiment of the present invention being within a closed area formed by connecting reference points is shown. Figure 6 In the example, the reference points include S1 to S5, and the closed area formed by S1 to S5 is Figure 6 The area enclosed by the dotted box is where the first boundary of the plot A to be updated is located.

[0094] In this embodiment, taking the circumscribed figure as a circle as an example, for example, the first circumscribed figure is circle a, the first reference points A1, A2 and A3 in circle a are determined, if at this time the first boundary is not in the closed area formed by the first reference points A1, A2 and A3, the radius of circle a is increased by a preset length len to expand circle a, the expanded circle a is represented by circle b, and the first reference points B1, B2 and B3 in circle b are determined, if at this time the first boundary is in the closed area formed by the first reference points of circle b, the first reference points B1, B2 and B3 of circle b are used as second reference points, otherwise the circle b is continuously expanded until the second reference point is determined.

[0095] Sub-step S1023, determining reference feature points and registration feature points based on the second reference point.

[0096] In this embodiment, the second reference point may be directly used as a reference feature point, or the reference feature point may need to be determined based on the second reference point. Specifically, it needs to be determined according to the registration point corresponding to the second reference point in the drone image and the second boundary of the land parcel to be updated in the drone image. As a specific implementation method, the processing process may be:

[0097] First, a first initial registration point corresponding to the second reference point in the UAV image is determined.

[0098] In this embodiment, the first initial registration point may be the registration feature point or may not be the registration feature point. If the first initial registration point is the registration feature point, the second reference point is the reference feature point.

[0099] Secondly, the UAV image is registered based on the second reference point and the first initial registration point.

[0100] In this embodiment, the process of registering the drone image is to register the drone image with the digital orthophoto map as the standard. The specific registration process can be: first, the correspondence between the second reference point and the first initial registration point is established through feature description calculation and similarity measurement. Secondly, according to the geometric distortion between the drone image and the digital orthophoto map, the geometric transformation model that best fits the changes between the two is selected. Common transformation models include affine transformation, perspective transformation, polynomial transformation, etc. Finally, the drone image is subjected to corresponding parameter transformation according to the geometric transformation model so that it is in the same coordinate system as the digital orthophoto map.

[0101] Third, extract the second boundary of the plot to be updated in the registered UAV image.

[0102] In this embodiment, the second boundary may be extracted by using an image segmentation model or a boundary extraction algorithm. The boundary extraction algorithm includes, but is not limited to, a Sobel algorithm, a Laplacian algorithm, a Canny algorithm, and the like.

[0103] Fourth, if the second boundary is within a closed area formed by the first initial registration points corresponding to the second reference point, the second reference point is used as a reference feature point, and the first initial registration point is used as a registration feature point.

[0104] Fifth, if the second boundary is not within the closed area formed by the first initial registration points corresponding to the second reference point, the second circumscribed figure corresponding to the second reference point is enlarged, and the second reference point is re-determined based on the first reference point in the second circumscribed figure, and the above steps are repeated until the second boundary is within the closed area formed by the first initial registration points corresponding to the second reference point.

[0105] In this embodiment, the method of redetermining the second reference point based on the first reference point in the second circumscribed figure is similar to the method of determining the second reference point based on the first reference point in the first circumscribed figure. If the first boundary is not within the closed area formed by the first reference points in the second circumscribed figure, it is necessary to expand the second circumscribed figure, replace the second circumscribed figure with the expanded second circumscribed figure, and replace the first reference point with the first reference point of the expanded second circumscribed figure until the first boundary is within the closed area formed by the first reference points in the second circumscribed figure, and finally redetermine the second reference point. The details are not repeated here.

[0106] The above method provided in this embodiment ensures that the first boundary of the land parcel to be updated in the DOM is within the closed area formed by the reference feature points, and the second boundary of the land parcel to be updated in the drone image is within the closed area formed by the registration feature points by determining the reference feature points and the registration feature points, thereby achieving precise matching of the land parcel to be updated in the DOM and the land parcel to be updated in the drone image, thereby ensuring the accuracy of the land parcel information update.

[0107] exist Figure 1 Based on this, the embodiment of the present invention also provides a specific implementation method for updating the plot information, please refer to Figure 7 , Figure 7 for Figure 1 A flow chart of step 103 in the plot information updating method is shown, where step S103 includes the following sub-steps:

[0108] Sub-step S103-11, taking a closed area formed by connecting the reference feature points as the first area.

[0109] Sub-step S103-12: taking the closed area formed by the registration feature points as the second area.

[0110] Sub-step S103 - 13 , replacing the land parcel image in the first area with the land parcel image in the second area, so as to update the land parcel image of the land parcel to be updated in the digital orthophoto map.

[0111] The above method provided by the embodiment of the present invention realizes low-cost updating of the plot image by replacing the first area in the digital orthophoto map with the second area in the drone image.

[0112] exist Figure 1 Based on this, the embodiment of the present invention also provides another specific implementation method for updating the plot information, please refer to Figure 8 , Figure 8 for Figure 1 A flow chart of step 103 in the plot information updating method is shown, where step S103 further includes the following sub-steps:

[0113] Sub-step S103-21, obtaining a first crop category of a first area.

[0114] Sub-step S103-22, determining a second crop category in a second area.

[0115] In this embodiment, the first area is a closed area formed by connecting reference feature points, and the second area is a closed area formed by connecting registration feature points.

[0116] Sub-step S103-23, replacing the first crop category with the second crop category, so as to update the crop category of the plot to be updated in the digital orthophoto.

[0117] The above method provided by the embodiment of the present invention realizes low-cost updating of the plot image by replacing the crop category of the first area in the digital orthophoto map with the crop category of the second area in the drone image.

[0118] It should be noted that the plot image of the plot to be updated in the digital orthophoto map can be updated separately, the crop category of the plot to be updated in the digital orthophoto map can be updated separately, or the plot image and crop category can be updated at the same time. Of course, based on the above method, other plot information of the plot to be updated in the digital orthophoto map can also be updated, such as the growth of crops in the plot, the area of ​​the plot, etc.

[0119] In order to execute the corresponding steps in the above embodiment and various possible implementations, an implementation method of the land parcel information updating device 100 is provided below. Fig. 9 , Fig. 9 The block diagram of the land parcel information updating device 100 provided in the embodiment of the present invention is shown. It should be noted that the basic principle and technical effects of the land parcel information updating device 100 provided in this embodiment are the same as those in the above embodiment, which are not mentioned in this embodiment for the sake of brief description.

[0120] The land parcel information updating device 100 includes an acquisition module 110 , a determination module 120 and an updating module 130 .

[0121] The acquisition module 110 is used to acquire a digital orthophoto map and a drone image of the land parcel to be updated, wherein the digital orthophoto map includes a first boundary of the land parcel to be updated in the digital orthophoto map.

[0122] The determination module 120 is used to determine the reference feature points in the circumscribed graph of the first boundary and the registration feature points in the drone image corresponding to the reference feature points.

[0123] Optionally, the determination module 120 is specifically used to: determine a first reference point within a first circumscribed figure, wherein the first circumscribed figure is the smallest figure in the circumscribed figure; based on the first reference point, determine a second reference point, wherein the first boundary is within a closed area formed by the second reference point; based on the second reference point, determine a reference feature point and a registration feature point.

[0124] Optionally, when the determination module 120 is specifically used to determine the second reference point based on the first reference point, it is specifically used to: if the first boundary is within the closed area formed by the first reference points, use the first reference point as the second reference point; if the first boundary is not within the closed area formed by the first reference points, expand the first circumscribed figure, replace the first circumscribed figure with the expanded first circumscribed figure, and replace the first reference point with the first reference point in the expanded first circumscribed figure, until the first boundary is within the closed area formed by the first reference points, and use the first reference point corresponding to the closed area where the first boundary is located as the second reference point.

[0125] Optionally, when the determination module 120 is specifically used to determine the reference feature point and the registration feature point based on the second reference point, it is specifically used to: determine the first initial registration point in the human-machine image corresponding to the second reference point; register the drone image according to the second reference point and the first initial registration point; extract the second boundary of the plot to be updated in the registered drone image; if the second boundary is in the closed area formed by the first initial registration point corresponding to the second reference point, use the second reference point as the reference feature point and the first initial registration point as the registration feature point; if the second boundary is not in the closed area formed by the first initial registration point corresponding to the second reference point, expand the second external figure corresponding to the second reference point, and redetermine the second reference point based on the first reference point in the second external figure, and repeat the above steps until the second boundary is in the closed area formed by the first initial registration point corresponding to the second reference point.

[0126] Optionally, when the determining module 120 is specifically used to determine the first reference point in the first circumscribed graphic, it is specifically used to: if there is a corner point in the first circumscribed graphic, use the corner point as the first reference point.

[0127] Optionally, when the determination module 120 is specifically used to determine the first reference point within the first circumscribed figure, it is also specifically used to: perform boundary fitting on each of the multiple edges to obtain a boundary fitting line for each edge; if the intersection of two intersecting boundary fitting lines is within the first circumscribed figure, the intersection is used as the first reference point.

[0128] The updating module 130 is used to update the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points.

[0129] Optionally, the plot information includes a plot image, and the update module 130 is specifically used to: use the closed area formed by the reference feature points as the first area; use the closed area formed by the registration feature points as the second area; use the plot image of the second area to replace the plot image of the first area, so as to update the plot image of the plot to be updated in the digital orthophoto map.

[0130] Optionally, the plot information also includes crop categories, and the closed area formed by the reference feature points is taken as the first area, and the closed area formed by the registration feature points is taken as the second area. The update module 130 is specifically used to: obtain the first crop category of the first area; determine the second crop category of the second area; replace the first crop category with the second crop category to update the crop category of the plot to be updated in the digital orthophoto map.

[0131] Please refer to Fig.10 , Fig.10 The block diagram of the electronic device 10 provided in the embodiment of the present application is shown. The electronic device 10 can be a computer device, for example, any one of a smart phone, a tablet computer, a personal computer, a server, a ground station, a private cloud, a public cloud, etc. The above devices can be used to implement the land parcel information update method provided in the above embodiment, which can be determined according to the actual application scenario and is not limited here. The electronic device 10 includes a processor 11, a memory 12 and a bus 13, and the processor 11 is connected to the memory 12 via the bus 13.

[0132] The memory 12 is used to store programs, such as Fig. 9 The plot information updating device 100 shown includes at least one software function module that can be stored in the memory 12 in the form of software or firmware. After receiving the execution instruction, the processor 11 executes the program to implement the plot information updating method disclosed in the above embodiment.

[0133] The memory 12 may include a high-speed random access memory (RAM) and may also include a non-volatile memory (NVM).

[0134] The processor 11 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 11 or an instruction in the form of software. The above processor 11 may be a general processor, including a central processing unit (CPU), a microcontroller unit (MCU), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), an embedded ARM and other chips.

[0135] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by the processor 11, the method for updating the plot information disclosed in the above embodiment is implemented.

[0136] In summary, the embodiments of the present invention provide a method, device, electronic device and storage medium for updating plot information, the method comprising: obtaining a digital orthophoto map and a drone image of the plot to be updated, wherein the digital orthophoto map includes a first boundary of the plot to be updated in the digital orthophoto map; determining reference feature points within the circumscribed graphics of the first boundary and registration feature points in the drone image corresponding to the reference feature points; and updating the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points. Compared with the prior art, the embodiments of the present invention use low-cost drone images to update the plot information of the plot to be updated in the digital orthophoto map, which greatly reduces the update cost of the digital orthophoto map.

[0137] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for updating land parcel information, characterized in that: The method comprises: Acquire a digital orthophoto map and a drone image of the land parcel to be updated, wherein the digital orthophoto map includes a first boundary of the land parcel to be updated in the digital orthophoto map; Determine reference feature points within a circumscribed figure of the first boundary and registration feature points in the drone image corresponding to the reference feature points, the circumscribed figure comprising a minimum circumscribed figure of the first boundary and a figure concentric with the minimum circumscribed figure that is expanded one or more times according to a preset step length, the first boundary is within a closed area formed by the reference feature points, and the second boundary of the plot to be updated in the drone image is within a closed area formed by the registration feature points; The plot information of the plot to be updated in the digital orthophoto map is updated according to the reference feature points and the registration feature points.

2. The method for updating land parcel information according to claim 1, characterized in that: The step of determining the reference feature points in the circumscribed graph of the first boundary and the registration feature points in the drone image corresponding to the reference feature points comprises: Determine a first reference point in a first circumscribed figure, wherein the first circumscribed figure is a minimum figure in the circumscribed figures; Based on the first reference point, determining a second reference point, wherein the first boundary is within a closed area formed by the second reference point; Based on the second reference point, the reference feature point and the registration feature point are determined.

3. The method for updating land parcel information according to claim 2, characterized in that: The step of determining a second reference point based on the first reference point comprises: If the first boundary is within a closed area formed by the first reference points, the first reference point is used as the second reference point; If the first boundary is not within the closed area formed by the first reference points, the first circumscribed figure is enlarged, and the first circumscribed figure is replaced by the enlarged first circumscribed figure, and the first reference point is replaced by the first reference point in the enlarged first circumscribed figure, until the first boundary is within the closed area formed by the first reference points, and the first reference point corresponding to the closed area where the first boundary is located is used as the second reference point.

4. The method for updating land parcel information according to claim 2, characterized in that: The step of determining the reference feature point and the registration feature point based on the second reference point comprises: Determining a first initial registration point in the drone image corresponding to the second reference point; Registering the drone image according to a second reference point and the first initial registration point; Extracting a second boundary of the land parcel to be updated in the registered UAV image; If the second boundary is within a closed area formed by the first initial registration points corresponding to the second reference point, the second reference point is used as the reference feature point, and the first initial registration point is used as the registration feature point; If the second boundary is not within the closed area formed by the first initial registration points corresponding to the second reference point, the second circumscribed figure corresponding to the second reference point is enlarged, and the second reference point is re-determined based on the first reference point in the second circumscribed figure, and the above steps are repeated until the second boundary is within the closed area formed by the first initial registration points corresponding to the second reference point.

5. The method for updating land parcel information according to claim 2, characterized in that: The step of determining the first reference point in the first circumscribed graph comprises: If there is a corner point in the first circumscribed graphic, the corner point is used as the first reference point.

6. The method for updating land parcel information according to claim 2, characterized in that: The first boundary includes a plurality of edges, and the step of determining a first reference point in the first circumscribed graph further includes: Performing boundary fitting on each of the multiple edges to obtain a boundary fitting line of each edge; If the intersection point of the two intersecting boundary fitting lines is within the first circumscribed figure, the intersection point is used as the first reference point.

7. The method for updating land parcel information according to claim 1, characterized in that: The plot information includes a plot image, and the step of updating the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points includes: Taking a closed area formed by connecting the reference feature points as a first area; Taking the closed area formed by connecting the registration feature points as the second area; The plot image of the first area is replaced by the plot image of the second area, so as to update the plot image of the plot to be updated in the digital orthophoto map.

8. The method for updating land parcel information according to claim 1, characterized in that: The plot information also includes crop categories, a closed area formed by connecting the reference feature points is used as a first area, and a closed area formed by connecting the registration feature points is used as a second area, and the step of updating the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points also includes: Acquire a first crop category of the first area; determining a second crop category for the second region; The first crop category is replaced by the second crop category to update the crop category of the to-be-updated plot in the digital orthophoto map.

9. A land parcel information updating device, characterized in that: The device comprises: An acquisition module, used for acquiring a digital orthophoto map and a drone image of the land parcel to be updated, wherein the digital orthophoto map includes a first boundary of the land parcel to be updated in the digital orthophoto map; a determination module, configured to determine reference feature points within a circumscribed figure of the first boundary and registration feature points in the drone image corresponding to the reference feature points, the circumscribed figure comprising a minimum circumscribed figure of the first boundary and a figure concentric with the minimum circumscribed figure that is expanded one or more times according to a preset step length, the first boundary being within a closed area formed by the reference feature points, and a second boundary of the plot to be updated in the drone image being within a closed area formed by the registration feature points; An updating module is used to update the plot information of the plot to be updated in the digital orthophoto map according to the reference feature points and the registration feature points.

10. An electronic device, characterized in that: The electronic device comprises: one or more processors; A memory for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the land parcel information updating method as described in any one of claims 1-8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for updating plot information as described in any one of claims 1 to 8 is implemented.

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