KR102599272B1 - Apparatus and method for measuring road width - Google Patents

Abstract

The present invention includes a camera that photographs the front of a vehicle, a laser pointer that emits a laser beam, a rotation motor that rotates the laser pointer, a touch screen that outputs an image and receives touch input, and a touch screen that transmits the image captured through the camera. output through a laser pointer, receive first and second touch inputs through a touch screen, irradiate a laser beam through a laser pointer to create a straight guide line on the ground in front of the vehicle, and rotate the laser pointer through a rotation motor. , The guide line is characterized in that it includes a processor that calculates the distance between the first and second points corresponding to the first and second touch inputs based on the captured image.

Description

Road width calculation device and method {APPARATUS AND METHOD FOR MEASURING ROAD WIDTH}

The present invention relates to a road width calculation device and method, and more specifically, to a road width calculation device and method that can calculate the road width of a narrow road located in front of a vehicle and guide the user.

In general, when the area of the road is limited by obstacles, such as when a vehicle is parked in a narrow alley, the driver compares the width of the vehicle and the road using the naked eye or a camera installed in the vehicle to determine whether the vehicle is traveling on the road. Decide whether you can pass. However, for drivers with little driving experience or inexperienced driving skills, it is not easy to determine whether a vehicle can pass through a narrow road, and if a driver enters a narrow road without sufficient space forcibly, the surrounding people may be injured in the process of passing the narrow road. Contact accidents may occur due to collision with an obstacle.

The background technology of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2018-0068484 (published on June 22, 2018).

The present invention was created to solve the above-described problems, and an object of one aspect of the present invention is to provide a road width calculation device and method that can calculate the road width of a narrow road located in front of a vehicle and guide the user. will be.

A road width calculation device according to one aspect of the present invention includes a camera that photographs the front of a vehicle; A laser pointer that emits a laser beam; a rotation motor that rotates the laser pointer; A touch screen that outputs images and receives touch input; and outputting an image captured through the camera through the touch screen, receiving first and second touch inputs through the touch screen, and using the laser pointer to create a straight guide line on the ground in front of the vehicle. irradiates a laser beam through, rotates the laser pointer through the rotation motor, and determines the distance between the first and second points corresponding to the first and second touch inputs based on the image in which the guide line is captured. Characterized in that it includes a processor that calculates.

In the present invention, the processor calculates angles formed by the first and second points and the laser pointer, and calculates first and second distances, which are the distances between the first and second points and the laser pointer, The distance between the first and second points is calculated based on the angle and the first and second distances.

In the present invention, the processor measures first and second times, which are times when the guide line passes through first and second image coordinates corresponding to the first and second touch inputs, and 2 The angle is calculated based on the time and the angular velocity of the guide line.

In the present invention, the guide line includes graduations displayed at regular intervals, and the processor, at the point when the guide line passes through the first and second image coordinates corresponding to the first and second touch inputs, The first and second distances are calculated by reading the scale displayed on the guide line.

In the present invention, the processor determines whether the distance between the first and second points is more than the vehicle width of the vehicle, and determines that the distance between the first and second points is not more than the vehicle width of the vehicle. In this case, a warning signal is output.

A road width calculation method according to an aspect of the present invention includes the steps of photographing the front of a vehicle using a camera; Outputting an image captured by the camera through a touch screen; Receiving first and second touch inputs through the touch screen; irradiating a laser beam through a laser pointer to create a straight guide line on the ground in front of the vehicle; rotating the laser pointer via a rotation motor; and calculating a distance between first and second points corresponding to the first and second touch inputs based on the image in which the guide line is captured.

According to one aspect of the present invention, the road width of the narrow road located in front of the vehicle can be calculated and guided to the user, and it is also possible to determine whether the vehicle can pass through the narrow road by comparing the road width and vehicle width of the narrow road located in front of the vehicle. Accidents on narrow roads can be prevented in advance by determining whether or not a vehicle is present and informing the user of the results of the judgment.

1 is a block diagram illustrating a road width calculation device according to an embodiment of the present invention.
Figures 2 and 3 are exemplary diagrams for explaining a road width calculation device according to an embodiment of the present invention.
Figure 4 is a first flowchart for explaining a method for calculating road width according to an embodiment of the present invention.
Figure 5 is a second flowchart for explaining a method for calculating road width according to an embodiment of the present invention.
Figures 6 and 7 are exemplary diagrams for explaining a method for calculating road width according to an embodiment of the present invention.
Figure 8 is a third flowchart for explaining the road width calculation method according to an embodiment of the present invention.

Hereinafter, a road width calculation device and method according to an embodiment of the present invention will be described in detail with reference to the attached drawings. In this process, the thickness of lines or sizes of components shown in the drawing may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

FIG. 1 is a block diagram for explaining a road width calculating device according to an embodiment of the present invention, and FIGS. 2 and 3 are exemplary diagrams for explaining a road width calculating device according to an embodiment of the present invention.

Referring to Figures 1 and 2, the road width calculation device according to an embodiment of the present invention includes a camera 100, a laser pointer 200, a rotation motor 300, a touch screen 400, and a processor 500. can do.

The camera 100 can capture the front of the vehicle under the control of the processor 500, which will be described later, and output the captured image to the touch screen 400 and the processor 500, which will be described later.

The laser pointer 200 can generate a straight guide line 10 on the ground in front of the vehicle by irradiating a laser beam. The laser pointer 200 may be a light source for generating a straight guide line 10 on the ground in front of the vehicle. The laser pointer 200 may emit a laser beam under the control of the processor 500. Here, the guide line 10 may be a straight laser line formed through a laser beam. As shown in FIG. 2, the guide line 10 may include graduations displayed at regular intervals. The guide line 10 may function like a ruler for measuring length.

The rotation motor 300 may rotate the laser pointer 200 under the control of the processor 500. The rotation motor 300 may rotate the laser pointer 200 about an axis perpendicular to the ground. When the laser pointer 200 is rotated by the rotation motor 300, the guide line 10 may be rotated around the laser pointer 200.

The touch screen 400 can output images and receive touch input. The touch screen 400 may output an image captured through the camera 100 under the control of the processor 500. The touch screen 400 may receive a touch input from the user and output it to the processor 500.

The processor 500 outputs an image captured through the camera 100 through the touch screen 400, receives first and second touch inputs through the touch screen 400, and displays a straight line on the ground in front of the vehicle. A laser beam is irradiated through the laser pointer 200 to create the guide line 10, the laser pointer 200 is rotated through the rotation motor 300, and the guide line 10 is created based on the captured image. The distance between the first and second points corresponding to the first and second touch inputs can be calculated.

Here, the first and second touch inputs refer to information indicating a certain point on the image output through the touch screen 400. Specifically, the first touch input indicates the point of view of the narrow road where the road width is to be measured. It may be as follows, and the second touch input may be for indicating the end point of a narrow road where the road width is to be measured. Meanwhile, the first point may mean the actual location of a point on the image corresponding to the first touch input, and the second point may mean the actual location of the point on the image corresponding to the second touch input.

The processor 500 may rotate the laser pointer 200 through the rotation motor 300 to move the guide line 10 as shown in FIG. 3 . The processor 500 may rotate the laser pointer 200 to move the guide line 10 from the first position to the second position. Figure 3a shows the guide line 10 located at the first position, Figure 3b shows the guide line 10 at the moment of passing the first point, and Figure 3c shows the guide line 10 at the moment of passing the second point. A guide line 10 is shown, and FIG. 3D shows the guide line 10 located in a second position.

The processor 500 calculates the angle formed by the first and second points and the laser pointer 200, calculates the first and second distances, which are the distances between the first and second points and the laser pointer 200, and calculates The distance between the first and second points can be calculated based on the angle and the first and second distances.

The processor 500 measures the first and second times, which are the times at which the guide line 10 passes through the first and second image coordinates corresponding to the first and second touch inputs, and determines the first and second times and Based on the angular velocity of the guide line 10, the angle formed between the first and second points and the laser pointer 200 can be calculated. Here, the first image coordinates may mean the image coordinates of the point indicated by the first touch input, and the second image coordinates may mean the image coordinates of the point indicated by the second touch input.

The processor 500 reads the scale displayed on the guide line 10 at the point when the guide line 10 passes through the first and second image coordinates corresponding to the first and second touch inputs to determine the first and second distances. It can be calculated.

The processor 500 may determine whether the distance between the first and second points is more than the vehicle width, and output a warning signal if it is determined that the distance between the first and second points is not more than the vehicle width.

FIG. 4 is a first flowchart for explaining a method for calculating road width according to an embodiment of the present invention. Referring to FIG. 4, the method by which the processor 500 calculates road width is explained.

First, the processor 500 can photograph the front of the vehicle through the camera 100 (S401). That is, the processor 500 can photograph the narrow road on which the road width is to be measured using the camera 100.

Subsequently, the processor 500 may output the image captured through the camera 100 through the touch screen 400 (S403). That is, the processor 500 can output an image in which a narrow passage is captured through the touch screen 400.

Next, the processor 500 may receive the first and second touch inputs through the touch screen 400 (S405). That is, the processor 500 can receive information indicating both end points of the narrow road where the road width is to be measured through the touch screen 400.

When the first and second touch inputs are received through the touch screen 400, the processor 500 irradiates a laser beam through the laser pointer 200 to create a straight guide line 10 on the ground in front of the vehicle. (S407).

Next, the processor 500 may rotate the laser pointer 200 through the rotation motor 300 (S409). That is, the processor 500 may rotate the laser pointer 200 through the rotation motor 300 so that the guide line 10 created on the ground in front of the vehicle rotates around the laser pointer 200. The processor 500 may rotate the laser pointer 200 to move the guide line 10 from the first position to the second position. The first location and the second location may be preset.

Next, the processor 500 may calculate the distance between the first and second points corresponding to the first and second touch inputs based on the image in which the guide line 10 is captured (S411). A specific method of calculating the distance between the first and second points will be described later.

Next, it may be determined whether the distance between the first and second points is greater than or equal to the vehicle width (S413). The processor 500 may determine whether the distance between the first and second points is greater than or equal to the vehicle width by comparing the distance between the first and second points and the vehicle width. The vehicle width may be stored in advance.

Next, the processor 500 may output a result of determining whether the distance between the first and second points is greater than or equal to the vehicle width (S415). If it is determined that the distance between the first and second points is greater than the vehicle width, the processor 500 determines that the vehicle can pass the road with both ends of the first and second points, and determines that the vehicle can pass the road. A signal indicating that it can be done can be output. On the other hand, if it is determined that the distance between the first and second points is not more than the vehicle width, the processor 500 determines that the vehicle cannot pass the road with both ends of the first and second points, and the vehicle A warning signal can be output indicating that the road cannot be passed.

Figure 5 is a second flowchart for explaining a road width calculation method according to an embodiment of the present invention, and Figures 6 and 7 are exemplary diagrams for explaining a road width calculation method according to an embodiment of the present invention. A method by which the processor 500 calculates the distance between the first and second points will be described with reference to FIGS. 5 to 7 .

First, referring to FIG. 5, the processor 500 may calculate the angle formed between the first and second points and the laser pointer 200 based on the image captured through the camera 100 (S501). That is, the processor 500 may calculate the angle between the first and second points and the laser pointer 200 based on the image in which the rotating guide line 10 is captured. A specific method of calculating the angle between the first and second points and the laser pointer 200 will be described later.

Subsequently, the processor 500 may calculate first and second distances, which are the distances between the first and second points and the laser pointer 200, based on the image captured through the camera 100 (S503). That is, the processor 500 may calculate the first and second distances based on the image in which the rotating guide line 10 is captured. The processor 500 reads the scale displayed on the guide line 10 at the point when the guide line 10 passes through the first and second image coordinates corresponding to the first and second touch inputs to determine the first and second distances. It can be calculated.

The guide line 10 generated through the laser pointer 200 may have marks marked at regular intervals, and the processor 500 determines that the guide line 10 passes through the first image coordinates corresponding to the first touch input. A guide line 10 can be detected from an image captured at a point in time, and the first distance can be calculated by reading the scale displayed on the detected guide line 10. That is, as shown in FIG. 6A, the processor 500 may calculate the first distance through the scale displayed on the guide line 10 in an image captured at the moment the guide line 10 touches the first image coordinates.

Likewise, the processor 500 detects the guide line 10 in an image captured at the point when the guide line 10 passes the second image coordinates corresponding to the second touch input, and stores the guide line 10 in the detected guide line 10. The second distance can be calculated by reading the displayed scale. That is, as shown in FIG. 6B, the processor 500 may calculate the second distance through the scale displayed on the guide line 10 in the image captured at the moment the guide line 10 touches the second image coordinates.

Subsequently, the processor 500 calculates the first and the distance between the second points can be calculated (S505).

The processor 500 can measure the distance between the first and second points using Equation 1 below. That is, the processor 500 can measure the distance between the first and second points using the law of cosines.

는 제1 및 제2 지점과 레이저 포인터(200)가 이루는 각도일 수 있다.Referring to Figure 7, c is the distance between the first and second points, a is the distance between the first point and the laser pointer 200, b is the distance between the second point and the laser pointer 200,

may be the angle formed between the first and second points and the laser pointer 200.

According to another embodiment, the processor 500 calculates the angle of the laser pointer 200 and the distance between the first point and the laser pointer 200 at the moment the guide line 10 passes through the first image coordinates, and calculates the guide line 10. At the moment when the line 10 passes through the second image coordinates, the angle of the laser pointer 200 and the distance between the second point and the laser pointer 200 are calculated, and based on the calculated distance and angle, the first and second You can also calculate the distance between points. In this case, the processor 500 can measure the distance between the first and second points through Equation 2 below.

는 가이드 라인(10)이 제1 영상 좌표를 통과하는 순간에서 레이저 포인터(200)의 각도이고,

는 가이드 라인(10)이 제2 영상 좌표를 통과하는 순간에서 레이저 포인터(200)의 각도일 수 있다.Referring to FIG. 7, c is the distance between the first and second points, and c1 is the distance from the point where the extension line in the direction of travel of the vehicle and the straight line connecting the first and second points meet to the first point. , c2 is the distance from the point where the extension line in the direction of travel of the vehicle and the straight line connecting the first and second points meet to the second point, a is the distance between the first point and the laser pointer 200, b is the distance between the second point and the laser pointer 200,

is the angle of the laser pointer 200 at the moment the guide line 10 passes through the first image coordinates,

may be the angle of the laser pointer 200 at the moment when the guide line 10 passes through the second image coordinates.

FIG. 8 is a third flowchart for explaining a method for calculating road width according to an embodiment of the present invention. With reference to FIG. 8, the processor 500 calculates the angles between the first and second points and the laser pointer 200. Explain how to calculate it.

First, the processor 500 may measure the first time at which the guide line 10 passes the first image coordinates corresponding to the first touch input (S801). The processor 500 may analyze the image captured through the camera 100 and measure the first time, which is the time at which the guide line 10 passes the first image coordinates. That is, the processor 500 can measure the time at which the image at which the guide line 10 touches the first image coordinates is captured, as shown in FIG. 6A.

Subsequently, the processor 500 may measure the second time at which the guide line 10 passes the second image coordinates corresponding to the second touch input (S803). The processor 500 may measure the second time, which is the time at which the guide line 10 passes through the second image coordinates, by analyzing the image captured through the camera 100. That is, the processor 500 can measure the time at which the image where the guide line 10 touches the second image coordinates is captured, as shown in FIG. 6B.

Next, the processor 500 may calculate the time difference between the first and second times (S805). The processor 500 may calculate the time difference between the first and second times by subtracting the first time from the second time.

Subsequently, the processor 500 may calculate the angle between the first and second points and the laser pointer 200 based on the time difference between the first and second times and the angular velocity of the guide line 10 (S807). The processor 500 can rotate the laser pointer 200 at a constant angular velocity through the rotation motor 300, and in this case, the guide line 10 also rotates at a constant angular velocity. The processor 500 may calculate the angle between the first and second points and the laser pointer 200 by multiplying the angular velocity and the time difference between the first and second times.

According to another embodiment, the processor 500 analyzes the image captured through the camera 100 at the moment when the guide line 10 passes through the first and second image coordinates corresponding to the first and second touch inputs. may be captured respectively, the angle of the laser pointer 200 may be measured at each corresponding moment, and the angle formed between the first and second points and the laser pointer 200 may be calculated based on the measured angle.

In this way, this embodiment can guide the user by calculating the road width of the narrow road located in front of the vehicle, and also compares the road width and vehicle width of the narrow road located in front of the vehicle to determine whether the vehicle can pass through the narrow road. By determining and informing the user of the results of the judgment, accidents on narrow roads can be prevented in advance.

Implementations described herein may be implemented, for example, as a method or process, device, software program, data stream, or signal. Although discussed only in the context of a single form of implementation (eg, only as a method), implementations of the features discussed may also be implemented in other forms (eg, devices or programs). The device may be implemented with appropriate hardware, software, firmware, etc. The method may be implemented in a device such as a processor, which generally refers to a processing device that includes a computer, microprocessor, integrated circuit, or programmable logic device. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants (“PDAs”) and other devices that facilitate communication of information between end-users.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely illustrative, and those skilled in the art will recognize that various modifications and other equivalent embodiments can be made therefrom. You will understand. Therefore, the true technical protection scope of the present invention should be determined by the scope of the patent claims below.

10: Guidelines
100: Camera
200: Laser pointer
300: rotation motor
400: touch screen
500: Processor

Claims (6)

A camera that captures the front of the vehicle;
A laser pointer that emits a laser beam;
a rotation motor that rotates the laser pointer;
A touch screen that outputs images and receives touch input; and
Output the image captured through the camera through the touch screen, receive first and second touch inputs through the touch screen, and use the laser pointer to create a straight guide line on the ground in front of the vehicle. Radiate a laser beam, rotate the laser pointer through the rotation motor, and calculate the distance between the first and second points corresponding to the first and second touch inputs based on the image in which the guide line is captured. processor;
Including,
The processor calculates the angle formed between the first and second points and the laser pointer based on the angular velocity of the guide line formed as the laser pointer rotates, and the calculated angle is calculated according to a predefined equation. A road width calculation device characterized in that, upon input, the value output from the equation is calculated as the distance between the first and second points.
According to paragraph 1,
The processor calculates angles between the first and second points and the laser pointer, calculates first and second distances between the first and second points and the laser pointer, and calculates the angles and the second distances between the first and second points and the laser pointer. A road width calculation device, characterized in that calculating the distance between the first and second points based on the first and second distances.
According to paragraph 2,
The processor measures first and second times, which are times when the guide line passes through first and second image coordinates corresponding to the first and second touch inputs, and measures the first and second times and the A road width calculation device characterized in that the angle is calculated based on the angular velocity of the guide line.
According to paragraph 2,
The guide line includes graduations displayed at regular intervals,
The processor calculates the first and second distances by reading the scale displayed on the guide line at the point when the guide line passes through the first and second image coordinates corresponding to the first and second touch inputs. Characterized by a road width calculation device.
According to paragraph 1,
The processor determines whether the distance between the first and second points is more than the vehicle width of the vehicle, and generates a warning signal if it is determined that the distance between the first and second points is not more than the vehicle width of the vehicle. A road width calculation device characterized in that it outputs.
Photographing the front of the vehicle through a camera;
Outputting an image captured by the camera through a touch screen;
Receiving first and second touch inputs through the touch screen;
irradiating a laser beam through a laser pointer to create a straight guide line on the ground in front of the vehicle;
rotating the laser pointer via a rotation motor; and
calculating a distance between first and second points corresponding to first and second touch inputs based on the image in which the guide line is captured;
Including,
In the calculating step,
The angle formed between the first and second points and the laser pointer is calculated based on the angular velocity of the guide line formed according to the rotation of the laser pointer, and the calculated angle is input into a predefined equation. A road width calculation method, characterized in that the value output from the equation is calculated as the distance between the first and second points.

Images