Method and device for determining the visibility of a vehicle's rear muffler

Abstract

This application discloses a method and apparatus for determining the visibility of a vehicle's rear muffler, relating to the field of vehicle technology. The terminal can establish a field of view based on the extracted target contour line of the vehicle's rear bumper and observation reference points. After determining that the rear muffler in the vehicle's 3D model intersects with the field of view, it issues a warning message to indicate that the rear muffler does not meet the visibility design requirements. Since the target contour line is extracted from the vehicle's 3D model, the visibility of the vehicle's rear muffler can be determined during the vehicle's design phase, without needing to determine the visibility of the rear muffler after manufacturing a prototype vehicle. Therefore, it effectively improves the efficiency of determining the visibility of the vehicle's rear muffler and reduces the cost of determining the visibility of the rear muffler.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method and apparatus for determining the visibility of a vehicle's rear muffler. Background Technology

[0002] Vehicles may include a rear muffler, which reduces the noise generated by the vehicle's engine during operation. Furthermore, for safety and aesthetic reasons, the vehicle's rear muffler must meet visibility design requirements. These requirements mean that when the distance between a person and the rear of the vehicle is less than or equal to a target distance, the rear muffler should not be within the person's field of vision.

[0003] In related technologies, a prototype vehicle (i.e., a sample vehicle) can first be manufactured based on the vehicle's design drawings. Then, staff can observe whether the rear muffler of the prototype vehicle is visible from a target distance. After seeing the rear muffler, staff can adjust the design drawings to ensure that the rear muffler of the vehicle manufactured based on the adjusted design drawings meets the visibility design requirements.

[0004] However, in related technologies, the efficiency of determining the visibility of a vehicle's rear muffler is relatively low. Summary of the Invention

[0005] This application provides a method and apparatus for determining the visibility of a vehicle's rear muffler, which can solve the problem of low efficiency in determining the visibility of a vehicle's rear muffler in related technologies. The technical solution is as follows:

[0006] On the one hand, a method for determining the visibility of a vehicle's rear muffler is provided, applied to a terminal, the method comprising:

[0007] The target outline of the rear bumper of the vehicle is obtained from the three-dimensional model of the vehicle. The target outline is the outline of the rear bumper that is closer to the reference plane. The reference plane is the bearing surface of the wheel in the three-dimensional model in the reference coordinate system.

[0008] Based on the observation reference point in the reference coordinate system and at least one contour point in the target contour line, a field of view is established in the reference coordinate system. The observation reference point and the at least one contour point are both located on the field of view. The position of the observation reference point in the reference coordinate system is located on the side of the rear bumper away from the front of the vehicle, and the distance between the observation reference point and the bearing surface is less than the distance between the observation reference point and the target contour line.

[0009] If it is determined that the outline of the rear muffler in the three-dimensional model intersects with the field of view in the reference coordinate system, a warning message is issued, indicating that the rear muffler does not meet the visibility design requirements.

[0010] On the other hand, a visibility determination device for a vehicle's rear muffler is provided, configured on a terminal, the device comprising:

[0011] The acquisition module is used to acquire the target outline of the rear bumper of the vehicle from the three-dimensional model of the vehicle. The target outline is the outline of the rear bumper that is closer to the reference plane. The reference plane is the bearing surface of the wheel in the three-dimensional model in the reference coordinate system.

[0012] A module is established to establish a field of view in the reference coordinate system based on an observation reference point in the reference coordinate system and at least one contour point in the target contour line. The observation reference point and the at least one contour point are both located on the field of view. The observation reference point is located on the side of the rear bumper away from the front of the vehicle in the reference coordinate system, and the distance between the observation reference point and the bearing surface is less than the distance between the observation reference point and the target contour line.

[0013] If the reminder module determines that the outline of the rear muffler in the reference coordinate system intersects with the field of view, it issues a reminder message indicating that the rear muffler does not meet the visibility design requirements.

[0014] Optionally, the establishment module is used for:

[0015] Based on the observation reference points in the reference coordinate system and each contour point in the target contour line, a field of view is established, and the target contour line is located within the field of view.

[0016] Optionally, the establishment module is used for:

[0017] The target contour line is reduced to a target ratio to obtain a reference contour line, wherein one end of the reference contour line, one end of the target contour line, and the reference point are collinear, and the other end of the reference contour line, the other end of the target contour line, and the reference point are collinear.

[0018] A field of view is established based on the reference contour line and the target contour line, wherein the reference contour line is located within the field of view.

[0019] Optionally, the establishment module is used for:

[0020] A target contour point is determined in the target contour line, and the target contour point is the contour point in the target contour line that is closest to the bearing surface;

[0021] In the reference coordinate system, a first target straight line is determined that passes through the target contour point. The first target straight line is tangent to the target contour line and parallel to the width direction of the vehicle.

[0022] Based on the observation reference point and the first target line, a field of view is established, wherein the first target line is located within the field of view.

[0023] Optionally, the acquisition module is used for:

[0024] Obtain the three-dimensional model of the rear bumper of the vehicle from the three-dimensional model of the vehicle;

[0025] The target outline of the rear bumper is extracted from the three-dimensional model of the rear bumper.

[0026] Optionally, the device further includes a display module, the display module being used for:

[0027] The height of the target portion in the rear muffler is displayed. The outline of the target portion is located on the side of the field of view away from the rear bumper, and the extension direction of the height of the target portion is perpendicular to the field of view.

[0028] Optionally, the orthographic projection of the observation reference point on the target plane and the orthographic projection of the midpoint of the target contour line on the target plane are both located on the second target straight line;

[0029] Wherein, the second target line is parallel to the height extension direction of the vehicle, and the target plane is perpendicular to the bearing surface and parallel to the width direction of the vehicle.

[0030] In another aspect, a terminal is provided, the terminal comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method for determining the visibility of a vehicle's rear muffler as described above.

[0031] In another aspect, a computer-readable storage medium is provided, wherein a computer program is stored therein, the computer program being loaded and executed by a processor to implement the method for determining the visibility of a vehicle's rear muffler as described above.

[0032] In another aspect, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to perform the method for determining the visibility of the rear muffler of a vehicle as described above.

[0033] The beneficial effects of the technical solution provided in this application include at least the following:

[0034] This application provides a method and apparatus for determining the visibility of a vehicle's rear muffler. The terminal can establish a field of view based on the extracted target contour line of the vehicle's rear bumper and an observation reference point. After determining that the rear muffler in the vehicle's 3D model intersects with the field of view, a warning message is issued to indicate that the rear muffler does not meet the visibility design requirements. Since the target contour line is extracted from the vehicle's 3D model, the visibility of the vehicle's rear muffler can be determined during the vehicle's design phase, without needing to manufacture a prototype vehicle. This effectively improves the efficiency of determining the visibility of the vehicle's rear muffler and reduces the cost of determining its visibility.

[0035] Furthermore, since there is no need for manual determination of the visibility of the vehicle's rear muffler, the efficiency of determining the visibility of the vehicle's rear muffler is further improved. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a flowchart of a method for determining the visibility of a vehicle's rear muffler, provided in an embodiment of this application.

[0038] Figure 2 This is a flowchart of another method for determining the visibility of a vehicle's rear muffler, provided in an embodiment of this application.

[0039] Figure 3 This is a schematic diagram of a terminal acquiring a target contour line according to an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of a terminal establishing a field of view according to an embodiment of this application;

[0041] Figure 5 This is a schematic diagram showing the position of a rear muffler relative to the field of view, provided in an embodiment of this application.

[0042] Figure 6 This is a schematic diagram of the structure of a vehicle rear muffler visibility determination device provided in an embodiment of this application;

[0043] Figure 7This is a structural schematic diagram of another vehicle rear muffler visibility determination device provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0045] This application provides a method for determining the visibility of a vehicle's rear muffler, which can be applied to a terminal. Optionally, the terminal can be a mobile phone, tablet, laptop, or desktop computer. See also Figure 1 The method includes:

[0046] Step 101: Obtain the target outline of the rear bumper of the vehicle from the 3D model of the vehicle.

[0047] In this context, the target contour line of the rear bumper in the vehicle's 3D model is the contour line closest to the reference plane within the rear bumper's overall contour line. This reference plane is the bearing surface of the wheel in the 3D model within the reference coordinate system. In other words, the target contour line is the lowest contour line of the vehicle's rear bumper. This ensures the accuracy of the view plane established based on this target contour line.

[0048] Step 102: Based on the observation reference point in the reference coordinate system and at least one contour point in the target contour line, establish a field of view in the reference coordinate system.

[0049] In this embodiment, the terminal can determine an observation reference point in a reference coordinate system. This observation reference point is located on the side of the rear bumper in the 3D model furthest from the front of the vehicle, and the distance between the observation reference point and the load-bearing surface is less than the distance between the observation reference point and the target contour line. Then, the terminal can establish a field of view in the reference coordinate system based on the observation reference point and at least one contour point in the target contour line. Both the observation reference point and the at least one contour point are located on the field of view.

[0050] Step 103: If it is determined that the outline of the rear muffler in the 3D model intersects with the view plane in the reference coordinate system, a reminder message is issued.

[0051] After obtaining the field of view, the terminal can detect whether the outline of the rear muffler in the 3D model intersects with the field of view in the reference coordinate system. If the terminal determines that the outline of the rear muffler intersects with the field of view, it can be determined that the vehicle's rear muffler meets the visibility design requirements. That is, when the distance between a person and the rear of the vehicle is less than or equal to the target distance, the rear muffler is not within the field of view of the person. This target distance can be recorded in the visibility inspection specification for the rear muffler.

[0052] If the terminal determines that the outline of the rear muffler intersects with the field of vision, it can be determined that the vehicle's rear muffler meets the invisibility design requirement. That is, when the distance between a person and the rear of the vehicle is less than or equal to the target distance, the rear muffler is within the person's field of vision, which would result in poor vehicle aesthetics and affect driving safety. The terminal can then issue a reminder message to indicate that the rear muffler does not meet the visibility design requirement.

[0053] In summary, this application provides a method for determining the visibility of a vehicle's rear muffler. The terminal can establish a field of view based on the extracted target contour line of the vehicle's rear bumper and observation reference points. After determining that the rear muffler in the vehicle's 3D model intersects with the field of view, a warning message is issued to indicate that the rear muffler does not meet the visibility design requirements. Since the target contour line is extracted from the vehicle's 3D model, the visibility of the vehicle's rear muffler can be determined during the vehicle's design phase, without needing to determine the visibility of the rear muffler after manufacturing a prototype vehicle. Therefore, this effectively improves the efficiency of determining the visibility of the vehicle's rear muffler and reduces the cost of determining the visibility of the rear muffler.

[0054] Furthermore, since there is no need for manual determination of the visibility of the vehicle's rear muffler, the efficiency of determining the visibility of the vehicle's rear muffler is further improved.

[0055] Figure 2 This is another method for determining the visibility of a vehicle's rear muffler, provided in the application embodiment. This method can be applied to a terminal. See also... Figure 2 The method may include:

[0056] Step 201: Obtain the target outline of the rear bumper of the vehicle from the 3D model of the vehicle.

[0057] In this context, the target contour line of the rear bumper in the vehicle's 3D model is the contour line closest to the reference plane within the rear bumper's overall contour line. This reference plane is the bearing surface of the wheel in the 3D model within the reference coordinate system. In other words, the target contour line is the lowest contour line of the vehicle's rear bumper. This ensures the accuracy of the view plane established based on this target contour line.

[0058] This reference coordinate system is the vehicle coordinate system of the 3D model. The x-axis of this vehicle coordinate system is parallel to the width direction of the 3D model, the y-axis is parallel to the length direction of the 3D model, and the z-axis is parallel to the height direction of the 3D model.

[0059] In this embodiment, the terminal can acquire a 3D model of the vehicle and extract a 3D model of the rear bumper from the 3D model. Then, the terminal can extract the outline of the rear bumper from the 3D model, and subsequently extract the target outline from the outline of the rear bumper. The 3D model of the vehicle may be pre-stored in the terminal.

[0060] Optionally, the terminal can first extract the portion of the model near the load-bearing surface from the rear bumper model of the vehicle. Then, the terminal can identify the target surface near the load-bearing surface in that portion of the model and extract the target contour line from the contour line of that target.

[0061] For example, the terminal can display an insert option. In response to a click on the insert option, the terminal can display a wireframe option. Next, in response to a click on the wireframe option, the terminal can display a contour option, and in response to a click on the contour option, a quadratic curve option. Then, in response to a click on the quadratic curve option, the terminal can select the quadratic curve option, use the target surface as the support surface, select "outer" as the filter, and select "retain all elements" to obtain the contour line of the target surface.

[0062] The terminal can then select the fragmentation option to break down the target's outline into multiple outline segments, and obtain the target outline based on these multiple outline segments. The target outline can be formed by connecting at least two outline segments, which are the outline segments furthest from the front of the vehicle among the multiple outline segments.

[0063] For example, see Figure 3 The terminal can first extract the 3D model A of the vehicle's rear bumper, and then extract the portion of the model A11 near the load-bearing surface from this 3D model. Then, the terminal can identify the contour line L of the side of this portion of model A11 closest to the load-bearing surface, and extract the target contour line L from this contour line L. m .

[0064] Step 202: Based on the observation reference point in the reference coordinate system and at least one contour point in the target contour line, establish a field of view in the reference coordinate system.

[0065] In this embodiment, the terminal can determine an observation reference point in a reference coordinate system. This observation reference point is located on the side of the rear bumper in the 3D model furthest from the front of the vehicle, and the distance between the observation reference point and the load-bearing surface is less than the distance between the observation reference point and the target contour line. Then, the terminal can establish a field of view in the reference coordinate system based on the observation reference point and at least one contour point in the target contour line.

[0066] In this system, both the observation reference point and at least one contour point are located on the field of view. Furthermore, assuming the scale of the vehicle's 3D model to the vehicle (hereinafter referred to as the actual vehicle for ease of distinction) is *a*, and the actual vehicle is located on a horizontal plane, then the ratio of the distance from the observation reference point to the target contour line to the distance from the human eye to the rear of the actual vehicle is *a*, and the ratio of the distance from the observation reference point to the load-bearing surface to the distance from the human eye to the horizontal plane is also *a*. Optionally, the distances from the human eye to the rear of the actual vehicle and from the human eye to the horizontal plane can be recorded in the visibility inspection specifications for the rear muffler. For example, the distance from the human eye to the rear of the actual vehicle can be 5 meters (m), and the distance from the human eye to the horizontal plane can be 1.5 meters (m).

[0067] Optionally, the orthographic projection of the observation reference point onto the target plane and the orthographic projection of the midpoint of the target contour line onto the target plane both lie on the second target line. The second target line is parallel to the vehicle's height extension direction, and the target plane is perpendicular to the load-bearing surface and parallel to the vehicle's width direction. That is, the observation reference point is directly behind the vehicle's rear bumper.

[0068] In one alternative implementation, the terminal can determine a target contour point within the target contour line, which is the contour point closest to the bearing surface within the target contour line—that is, the lowest point in the rear bumper. Then, the terminal can determine a first target straight line passing through the target contour point in a reference coordinate system. This first target straight line is tangent to the target contour line and parallel to the width direction of the vehicle. Subsequently, the terminal can establish a field of view based on the observation reference point and the first target straight line, with the first target straight line lying within the field of view.

[0069] In another alternative implementation, the terminal can establish a field of view based on an observation reference point and various contour points within the target contour line, which can lie within this field of view. For example, the terminal can obtain multiple rays with the observation reference point as endpoints, each ray passing through a contour point. The terminal can then obtain the field of view based on these multiple rays.

[0070] Because the terminal can establish a field of view based on each contour point in the target outline—that is, it can consider the shape of the rear bumper when establishing the field of view—it can ensure that the established field of view is as close as possible to the human eye's field of vision, thus reducing the field of view difference. This ensures that the visibility conclusion of the vehicle's rear muffler obtained based on this field of view is highly accurate. This visibility conclusion may or may not meet the visibility design requirements.

[0071] Optionally, the terminal can scale down the target contour line according to the target ratio to obtain a reference contour line, wherein one end of the reference contour line, one end of the target contour line, and a reference point are collinear, and the other end of the reference contour line, the other end of the target contour line, and a reference point are also collinear. Then, the terminal can establish a field of view based on the reference contour line and the target contour line, where the reference contour line can lie within the field of view. For example, the terminal can first establish a reference surface based on the reference contour line and the target contour line. Then, the terminal can extend this reference surface in a direction away from the observation reference point to obtain the field of view.

[0072] Since the terminal can directly establish the field of view based on the reference contour line and the target contour line, the efficiency of establishing the field of view can be improved.

[0073] For example, the terminal can display scaling options in response to a click on an operation option. The operation options are displayed in response to a click on an insert option. Then, in response to a click on a target outline, the terminal selects the target outline and can display multiple alternative scaling ratios in response to a scaling option click. Afterward, in response to a selection of a target scaling ratio from the multiple alternative scaling ratios, the terminal can scale the target outline according to that target scaling ratio to obtain a reference outline.

[0074] Furthermore, the terminal can magnify the target contour line and establish a field of view based on the magnified target contour line and the reference contour line. For ease of distinction, the reduction ratio of the target contour line mentioned above is called the first target ratio, and the reference contour line mentioned above is called the first reference contour line. For example, the terminal can magnify the target contour line according to the second target ratio to obtain the second reference contour line. One end of the second reference contour line, one end of the target contour line, and the reference point are collinear; the other end of the second reference contour line, the other end of the target contour line, and the reference point are collinear. Then, the terminal can directly establish a field of view based on the first and second reference contour lines, where the second reference contour line can be located within the field of view. This further improves the efficiency of establishing the field of view.

[0075] Optionally, the terminal can display a multi-section surface option in response to a click on the surface option. The surface option is displayed by the terminal in response to a click on the insert option. Then, the terminal can obtain the view surface in response to clicks on the multi-section surface option, clicks on the first reference contour line, and clicks on the second reference contour line.

[0076] For example, assuming the first reference profile is L1 and the second reference profile is L2, then see... Figure 4 The field of view established by the terminal based on the first reference contour line L1 and the second reference contour line L2 can be as follows: Figure 4The surface α is shown.

[0077] Furthermore, from Figure 4 It can be seen that one end of the first reference contour line L1, one end of the second reference contour line L2, and the target contour line L m One end of the first reference contour line L1 is collinear with the observation reference point G; the other end of the second reference contour line L2 is the target contour line L. m At the other end, it is collinear with the observation reference point G. Furthermore, the resulting field of view α is a curved surface.

[0078] Step 203: Detect whether the outline of the rear muffler in the 3D model intersects with the view plane in the reference coordinate system.

[0079] After the terminal establishes the field of view, it can detect whether the outline of the rear muffler in the 3D model intersects with the field of view in the reference coordinates. If the terminal determines that the outline of the rear muffler in the reference coordinates does not intersect with the field of view, it can determine that the rear muffler meets the visibility design requirements, and then the operation ends, without executing subsequent processes. If the terminal determines that the outline of the rear muffler in the reference coordinates intersects with the field of view, it can determine that the rear muffler does not meet the visibility design requirements, and then step 204 can be executed.

[0080] In this embodiment, if the terminal determines that the position of a contour point of the rear muffler in the reference coordinates is located within the field of view, then the contour of the rear muffler in the reference coordinates intersects with the field of view. If the terminal determines that the position of any contour point of the rear muffler in the reference coordinates is not located within the field of view, then the contour of the rear muffler in the reference coordinates does not intersect with the field of view.

[0081] Step 204: Send a reminder message.

[0082] If the terminal determines that the outline of the rear muffler in the 3D model intersects with the view plane in the reference coordinate system, it can issue a warning message. This warning message can indicate that the rear muffler does not meet the visibility design requirements, so that vehicle designers can adjust the rear muffler in the 3D model in a timely manner to ensure that the adjusted rear muffler meets the visibility design requirements. For example, the size of the rear muffler or its position in the reference coordinate system can be adjusted.

[0083] Optionally, the notification message may include: a text message and / or an audio message. For example, the notification message may include: a text message and an audio message.

[0084] For example, see Figure 5 , Figure 5 The outline of the rear muffler H intersects with the field of view α, so the terminal can determine that the rear muffler does not meet the visibility design principle and can then issue a reminder message.

[0085] Step 205: Display the height of the target section in the rear muffler.

[0086] After determining that the outline of the rear muffler in the 3D model intersects with the field of view in the reference coordinate system, the terminal can also display the height of the target part (i.e., the visible part) of the rear muffler to provide reference data for adjusting the vehicle's rear muffler, thereby improving the adjustment efficiency and accuracy of the rear muffler in the 3D model. The outline of the target part is located on the side of the field of view away from the rear bumper, and the extension direction of the height of this target part is perpendicular to the field of view.

[0087] As described above, the terminal provided in this application embodiment can determine the field of view based on the target outline of the rear bumper in the vehicle's three-dimensional model during the vehicle design phase, and detect the visibility of the rear muffler based on the field of view and the position of the rear muffler in the three-dimensional model. That is, the visibility conclusion of the rear muffler can be analyzed and obtained before vehicle production. This improves the efficiency of determining the visibility of the rear muffler and avoids the problem of exposed rear mufflers during the vehicle design phase, preventing design changes due to visibility issues after vehicle production. This saves time in designing the rear muffler while ensuring the vehicle's aesthetics and safety.

[0088] It should be noted that the order of steps in the method for determining the visibility of a vehicle's rear muffler provided in this application embodiment can be appropriately adjusted, and steps can be added or removed as needed. For example, step 205 can also be deleted as appropriate. Any variations that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application, and therefore will not be elaborated further.

[0089] In summary, this application provides a method for determining the visibility of a vehicle's rear muffler. The terminal can establish a field of view based on the extracted target contour line of the vehicle's rear bumper and observation reference points. After determining that the rear muffler in the vehicle's 3D model intersects with the field of view, a warning message is issued to indicate that the rear muffler does not meet the visibility design requirements. Since the target contour line is extracted from the vehicle's 3D model, the visibility of the vehicle's rear muffler can be determined during the vehicle's design phase, without needing to determine the visibility of the rear muffler after manufacturing a prototype vehicle. Therefore, this effectively improves the efficiency of determining the visibility of the vehicle's rear muffler and reduces the cost of determining the visibility of the rear muffler.

[0090] Furthermore, since there is no need for manual determination of the visibility of the vehicle's rear muffler, the efficiency of determining the visibility of the vehicle's rear muffler is further improved.

[0091] The method for determining the type of inserted SIM card in a mobile terminal involves obtaining the product name of the inserted SIM card after it is inserted into the card slot. If the product name conforms to the encoding rules, the inserted SIM card is determined to be a Super SIM card. Since the mobile terminal can directly determine the type of the inserted SIM card based on its product name, the efficiency of determining the type of inserted SIM card is effectively improved.

[0092] This application provides a device for determining the visibility of a vehicle's rear muffler, which can be configured on a terminal. See also... Figure 6 The device 30 includes:

[0093] The acquisition module 301 is used to acquire the target outline of the rear bumper of the vehicle from the three-dimensional model of the vehicle. The target outline is the outline of the rear bumper that is closer to the reference plane. The reference plane is the bearing surface of the wheel in the three-dimensional model in the reference coordinate system.

[0094] Module 302 is used to establish a field of view in the reference coordinate system based on an observation reference point and at least one contour point in the target contour line. Both the observation reference point and the at least one contour point are located on the field of view. Specifically, the observation reference point is located on the side of the rear bumper furthest from the front of the vehicle, and the distance between the observation reference point and the bearing surface is less than the distance between the observation reference point and the target contour line.

[0095] If the reminder module 303 determines that the outline of the rear muffler in the reference coordinate system intersects with the field of view, it issues a reminder message indicating that the rear muffler does not meet the visibility design requirements.

[0096] Optionally, the establishment module 302 can be used for:

[0097] Based on the observation reference point in the reference coordinate system and each contour point in the target contour line, a field of view is established, in which the target contour line lies.

[0098] Optionally, the establishment module 302 can be used for:

[0099] The target contour line is reduced to a smaller scale to obtain a reference contour line. One end of the reference contour line, one end of the target contour line, and a reference point are collinear. The other end of the reference contour line, the other end of the target contour line, and a reference point are also collinear.

[0100] A field of view is established based on the reference contour and the target contour, with the reference contour located within the field of view.

[0101] Optionally, the establishment module 302 can be used for:

[0102] Determine the target contour point within the target contour line. The target contour point is the contour point within the target contour line that is closest to the bearing surface.

[0103] In the reference coordinate system, determine the first target straight line that passes through the target contour point. The first target straight line is tangent to the target contour line and parallel to the width direction of the vehicle.

[0104] Based on the observation reference point and the first target line, a field of view is established, with the first target line located within the field of view.

[0105] Optionally, the acquisition module 301 can be used for:

[0106] Obtain the 3D model of the rear bumper from the vehicle's 3D model;

[0107] Extract the target outline of the rear bumper from the 3D model of the rear bumper.

[0108] Optional, participate Figure 7 The device 30 may further include a display module 304. The display module 304 may be used for:

[0109] The height of the target portion in the display rear muffler is shown. The outline of the target portion is located on the side of the field of vision away from the rear bumper, and the extension direction of the height of the target portion is perpendicular to the field of vision.

[0110] Optionally, the orthographic projection of the observation reference point onto the target plane and the orthographic projection of the midpoint of the target contour line onto the target plane are both located on the second target line;

[0111] The second target line is parallel to the vehicle's height extension direction, and the target plane is perpendicular to the bearing surface and parallel to the vehicle's width direction.

[0112] In summary, this application provides a device for determining the visibility of a vehicle's rear muffler. This device can establish a field of view based on the extracted target contour line of the vehicle's rear bumper and an observation reference point. After determining that the rear muffler in the vehicle's 3D model intersects with the field of view, it issues a warning message to indicate that the rear muffler does not meet the visibility design requirements. Since the target contour line is extracted from the vehicle's 3D model, the visibility of the vehicle's rear muffler can be determined during the vehicle's design phase, without having to determine the visibility of the rear muffler after manufacturing a prototype vehicle. Therefore, it effectively improves the efficiency of determining the visibility of the vehicle's rear muffler and reduces the cost of determining the visibility of the rear muffler.

[0113] Furthermore, since there is no need for manual determination of the visibility of the vehicle's rear muffler, the efficiency of determining the visibility of the vehicle's rear muffler is further improved.

[0114] This application provides a terminal, which may include a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for determining the visibility of a vehicle's rear muffler as provided in the above embodiments, for example... Figure 1 or Figure 2 The method shown.

[0115] This application provides a computer-readable storage medium storing a computer program that is loaded by a processor and executed using the vehicle rear muffler visibility determination method provided in the above embodiments, for example... Figure 1 or Figure 2 The method shown.

[0116] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the method for determining the visibility of a vehicle's rear muffler provided in the above-described method embodiments, for example... Figure 1 or Figure 2 The method shown.

[0117] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0118] It should be understood that the term "and / or" as used herein indicates that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. Furthermore, the term "at least one" in this application means one or more, and the term "multiple" in this application means two or more.

[0119] In this application, the terms "first," "second," etc., are used to distinguish identical or similar items that have essentially the same function. It should be understood that there is no logical or temporal dependency between "first," "second," and "nth," nor is there any limitation on the quantity or execution order. For example, without departing from the scope of the various examples described, a first reference profile may be referred to as a second reference profile, and similarly, a second reference profile may be referred to as a first reference profile.

[0120] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for determining the visibility of a vehicle's rear muffler, characterized in that, Applied to a terminal, the method includes: The target outline of the rear bumper of the vehicle is obtained from the three-dimensional model of the vehicle. The target outline is the outline of the rear bumper that is closer to the reference plane. The reference plane is the bearing surface of the wheel in the three-dimensional model in the reference coordinate system. Based on the observation reference point in the reference coordinate system and at least one contour point in the target contour line, a field of view is established in the reference coordinate system. The observation reference point and the at least one contour point are both located on the field of view. The position of the observation reference point in the reference coordinate system is located on the side of the rear bumper away from the front of the vehicle, and the distance between the observation reference point and the bearing surface is less than the distance between the observation reference point and the target contour line. If it is determined that the outline of the rear muffler in the three-dimensional model intersects with the field of view in the reference coordinate system, a warning message is issued, indicating that the rear muffler does not meet the visibility design requirements.

2. The method according to claim 1, characterized in that, The step of establishing a field of view in the reference coordinate system based on the observation reference point in the reference coordinate system and at least one contour point in the target contour line includes: Based on the observation reference points in the reference coordinate system and each contour point in the target contour line, a field of view is established, and the target contour line is located within the field of view.

3. The method according to claim 2, characterized in that, The step of establishing a field of view based on the observation reference points in the reference coordinate system and each contour point in the target contour line includes: The target contour line is reduced to a target ratio to obtain a reference contour line, wherein one end of the reference contour line, one end of the target contour line, and a reference point are collinear, and the other end of the reference contour line, the other end of the target contour line, and the reference point are collinear. A field of view is established based on the reference contour line and the target contour line, wherein the reference contour line is located within the field of view.

4. The method according to claim 1, characterized in that, The step of establishing a field of view in the reference coordinate system based on the observation reference point in the reference coordinate system and at least one contour point in the target contour line includes: A target contour point is determined in the target contour line, and the target contour point is the contour point in the target contour line that is closest to the bearing surface; In the reference coordinate system, a first target straight line is determined that passes through the target contour point. The first target straight line is tangent to the target contour line and parallel to the width direction of the vehicle. Based on the observation reference point and the first target line, a field of view is established, wherein the first target line is located within the field of view.

5. The method according to any one of claims 1 to 4, characterized in that, The step of obtaining the target outline of the rear bumper of the vehicle from the three-dimensional model of the vehicle includes: Obtain the three-dimensional model of the rear bumper of the vehicle from the three-dimensional model of the vehicle; The target outline of the rear bumper is extracted from the three-dimensional model of the rear bumper.

6. The method according to any one of claims 1 to 4, characterized in that, After issuing the reminder message, the method further includes: The height of the target portion in the rear muffler is displayed. The outline of the target portion is located on the side of the field of view away from the rear bumper, and the extension direction of the height of the target portion is perpendicular to the field of view.

7. The method according to any one of claims 1 to 4, characterized in that, The orthographic projection of the observation reference point onto the target plane and the orthographic projection of the midpoint of the target contour line onto the target plane are both located on the second target straight line. Wherein, the second target line is parallel to the height extension direction of the vehicle, and the target plane is perpendicular to the bearing surface and parallel to the width direction of the vehicle.

8. A device for determining the visibility of a vehicle's rear muffler, characterized in that, Configured in a terminal, the device includes: The acquisition module is used to acquire the target outline of the rear bumper of the vehicle from the three-dimensional model of the vehicle. The target outline is the outline of the rear bumper that is closer to the reference plane. The reference plane is the bearing surface of the wheel in the three-dimensional model in the reference coordinate system. A module is established to establish a field of view in the reference coordinate system based on an observation reference point in the reference coordinate system and at least one contour point in the target contour line. The observation reference point and the at least one contour point are both located on the field of view. The observation reference point is located on the side of the rear bumper away from the front of the vehicle in the reference coordinate system, and the distance between the observation reference point and the bearing surface is less than the distance between the observation reference point and the target contour line. If the reminder module determines that the outline of the rear muffler in the reference coordinate system intersects with the field of view, it issues a reminder message indicating that the rear muffler does not meet the visibility design requirements.

9. The apparatus according to claim 8, characterized in that, The establishment module is used for: Based on the observation reference points in the reference coordinate system and each contour point in the target contour line, a field of view is established, and the target contour line is located within the field of view.

10. The apparatus according to claim 9, characterized in that, The establishment module is used for: The target contour line is reduced to a target ratio to obtain a reference contour line, wherein one end of the reference contour line, one end of the target contour line, and a reference point are collinear, and the other end of the reference contour line, the other end of the target contour line, and the reference point are collinear. A field of view is established based on the reference contour line and the target contour line, wherein the reference contour line is located within the field of view.

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