TWI457864B - Warning method for moving vehicles and electronic device and computer program product using the method - Google Patents

Description

Driving warning method and electronic device thereof and computer program product thereof

The present invention relates to an image processing method, and in particular to a driving warning method and an electronic device thereof and a computer program product thereof implemented by using an image processing method.

At present, the situation of collision vehicles often encountered in automobile driving mostly occurs in the case of driver absent-minded or exhaustive. Most of the collision prevention systems currently on the market are based on infrared/laser/radar systems, but these collision prevention systems require additional and special devices to project far-infrared/laser light/ The radar signal to the front object can achieve the desired effect, so the cost is higher. In addition, the more common driver fatigue detection system can only prompt the driver, and can not avoid the car accident caused by the driver's distraction. Therefore, how to use less hardware cost and shorter computing time, so that the driver can obtain warning information before the collision, is still an urgent problem in this field.

The present invention provides a driving warning method and an electronic device thereof and a computer program product thereof. By tracking a plurality of feature points of the preceding vehicle and calculating a statistical value representing the spatial distribution of the plurality of feature points, the divergence of the plurality of feature points can be determined according to the determination, and further determining whether to provide the warning information to the line Car driver. In this way, it is possible to warn the driver without having to add extra hardware and efficiently determine whether there is a chance of colliding with the vehicle.

According to an embodiment of the present invention, the present invention proposes a driving warning method. The method described is applicable to an electronic device and includes the following steps. The electronic device is used to detect a plurality of feature points in a given area in an image frame. Tracking the plurality of feature points for a preset time. A statistical value representing a spatial distribution of the plurality of feature points is calculated. In addition, based on the calculated statistical value, a divergence condition of the plurality of feature points is determined, and a warning message is provided to the driver of the row of cars according to the divergence condition.

According to an embodiment of the present invention, an electronic device is proposed in the present case. The electronic device includes an image capturing unit, a control module and a warning module. The image capturing unit is configured to capture at least one image to generate a corresponding image frame. a control module is connected to the image capturing unit for detecting a plurality of feature points in a given area in an image frame, tracking the plurality of feature points in a preset time, and calculating the representative a statistical value of a spatial distribution of the plurality of feature points, and determining a divergence of the plurality of feature points based on the calculated statistical value. In addition, the warning module is connected to the control module for receiving a control signal of the control module, and when the control module determines to provide a warning message to the driver of the row of vehicles according to the divergence condition, the warning message is output.

According to an embodiment of the present invention, the present invention provides a computer program product, wherein the computer program product stores a computer executable program, and when the computer executable program is loaded into an electronic device, the computer executable program The electronic device is caused to perform the following steps. Using this electronic device to detect in one Multiple feature points in a given area in the image frame. Tracking the plurality of feature points for a preset time. A statistical value representing a spatial distribution of the plurality of feature points is calculated. In addition, based on the calculated statistical value, a divergence condition of the plurality of feature points is determined, and a warning message is provided to the driver of the row of cars according to the divergence condition.

Based on the above, the embodiment of the present invention proposes a driving warning method and an electronic device thereof and a computer program product thereof. Detecting a plurality of feature points in a given area in an image frame, and tracking the plurality of feature points, and calculating a statistical value representing a spatial distribution of the plurality of feature points. In addition, based on the calculated statistical value, the divergence of the plurality of feature points is determined, and accordingly, whether or not warning information is provided to the driving driver is determined. In this way, it is possible to quickly determine whether there is a probability of colliding with the vehicle without adding additional hardware and a short calculation time to alert the driver.

In order to make the above features and advantages of the present invention more comprehensible, the following detailed description of the embodiments and the accompanying drawings.

FIG. 1 is a functional block diagram of an electronic device according to an embodiment of the present invention. The electronic device 10 is suitable for being disposed on an expansion base of a mobile object, such as an expansion base of a driver's seat. The electronic device 10 can continuously use image processing technology to detect whether it is too close to an object (for example, a car or a locomotive traveling ahead), and based on the detection result, determine whether to provide warning information to the driving driver to ensure Maintain a safe distance from the car or locomotive driving ahead.

In order to understand the convenience, here is the necessary components to realize the driving warning method of this case. The electronic device 10 includes an image capturing unit 11 , a control module 12 and a warning module 13 . The image capturing unit 11 is configured to capture one or more images to generate corresponding one or more image frames. The electronic device 10 may further include other components, such as an input unit (not shown), a communication module, or a global positioning system (GPS) processing module (not shown), etc., but the focus of the implementation of the present invention is the same as the other The component correlation is low and various other components that may be possible are not detailed here.

Referring to FIG. 1, the image capturing unit 11 can be a camera. The control module 12 is connected to the image capturing unit 11 for detecting a plurality of feature points in a given area in an image frame, tracking the plurality of feature points in a preset time, and calculating the representative a statistic of a spatial distribution of the plurality of feature points, and determining a divergence of the plurality of feature points based on the calculated statistic.

The control module 12 can include a memory unit (not shown) and a processor unit (not shown). The memory unit may store a statistical value of performing a plurality of feature points, tracking a plurality of feature points, calculating a spatial distribution representing the plurality of feature points, and determining a corresponding algorithm of the algorithm for determining whether to provide the warning signal according to the calculated statistical value. Code (software module or firmware code). The code can be executed by the processor unit to implement various functions of the control module 12.

In addition, the warning module 13 is electrically connected to the control module 12, and the control module 12 can provide a warning message to the warning module 13 according to the divergence condition. A row of car drivers. The warning information may be sound information, image information or vibration prompts to remind the driving driver that the safety distance with the preceding vehicle is too short, and appropriate driving processing, such as braking, is required.

The warning module 13 may include a sound output unit, an image output unit, a vibration generating unit, or any combination of the foregoing various units, to provide appropriate warning information, as the warning information may be sound information, image information, or vibration prompts. The driver of the vehicle (i.e., a user of the electronic device 10).

In this embodiment, the control module 12 of the electronic device 10 further tracks the plurality of feature points in an image frame, and further determines whether the plurality of feature points are tracked. In detail, the control module 12 continuously detects the same feature points in the image frame continuously captured by the image capturing unit 11 within a preset time (for example, 50 milliseconds), and determines whether the tracking is tracked. The plurality of feature points. The manner of tracking a plurality of feature points will be further explained below using FIGS. 2A to 2C.

In an embodiment of the present invention, before the control module 12 detects the plurality of feature points in a given area in an image frame, the control module 12 can detect the image frame in the image frame. A license plate to determine whether the license plate is detected. When the control module 12 detects the license plate, the control module 12 can successively detect the plurality of feature points in a given area of the image frame, wherein the given area is the license plate. In addition, when the control module 12 determines that the license plate is not detected, it waits for a preset time, and after the preset time, the control module 12 detects the next image captured by the image capturing unit 11. A license plate in the frame.

2A-2C are schematic diagrams showing tracking of a plurality of feature points on an object according to an embodiment of the present invention. Referring to FIG. 2A first, the image frame 201 displays a rear side image of a front vehicle. The image frame 201 displays at least one body 21 and a license plate 22. Taking the license plate as a given area, there are usually black letters on the license plate, and the black characters show the license plate number (which can be a combination of numbers and English letters). In the illustrated example of the image frame 201, the license plate 22 includes a number of "12345". In order to track a plurality of feature points, a point position on each digit can be used as a feature point, for example, a feature point S1 of a number "1" The feature point S2 of "2", the feature point S3 of the number "3", the feature point S4 of the number "4", and the feature point S5 of the number "5". However, the implementation manner of the present invention is not limited to the above. In other embodiments, more than one feature point may be selected on each number or each English letter, and the number of all selected feature points may be adjusted according to actual needs, and is not This is limited.

FIG. 2B illustrates another image frame 202. The image frame 202 may be the next image frame of the image frame 201 or the image capturing unit after the plurality of image frame periods of the image frame 201. 11 captured an image frame. The license plate 22 displayed in the image frame 202 is larger than the image frame 201, which represents a reduction in the relative distance between the electronic device 10 and the preceding vehicle. The control module 12 of the electronic device 10 can determine whether the relative distance between the electronic device 10 and the preceding vehicle is shortened by the following image processing program.

In detail, the feature point S1 of the number "1", the feature point S2 of the number "2", the feature point S3 of the number "3", the feature point S4 of the number "4", and the feature point S5 of the number "5" are respectively changed. It is the feature points P1, P2, P3, P4, P5. Since the feature point S3 of the number "3" is located opposite to the image frame 201 The central position, so the feature point P3 is more difficult to distinguish from the feature point S3, but the other feature points P1, P2, P4, P5 are at the position of the image frame 202, which is significantly higher than the previous position of the previous image frame 201, by the image frame A center point position of 201 diverges around. The control module 12 determines whether the relative distance between the electronic device 10 and the preceding vehicle is too short, and determines whether to control the warning module 13 to provide a warning message to the driving driver.

FIG. 2C illustrates another image frame 203. The image frame 203 may be the next image frame of the image frame 201, or may be captured by the image frame frame 201 after multiple image frame periods are counted. An image frame captured by unit 11. Contrary to the case of FIG. 2B, the license plate 22 displayed by the image frame 203 is smaller than the image frame 201, and each feature point is clearly converge toward the center point of the image frame 201. Since the drawing space is small, each feature point is not marked one by one in the image frame 203. The control module 12 is determined by the divergence of a plurality of feature points, and can determine that the relative distance between the electronic device 10 and the preceding vehicle is elongated, and does not need to provide a warning message to the driving driver.

Using the license plate 22 as a given range can provide an initial value for determining the relative distance change between the electronic device 10 and the preceding vehicle, and thus can efficiently detect a plurality of feature points and reduce the need to determine the relative distance change. The operation time does not require additional hardware components such as far infrared rays, lasers, and radar detection signals. However, the embodiment of the present invention is not limited to the license plate, and in other embodiments, the feature points in the rear side image of the preceding vehicle can be directly utilized. For example, the rear window glass can be used with the surrounding The image difference between the window structures extracts a plurality of feature points as an initial value for determining a change in the relative distance between the electronic device 10 and the preceding vehicle.

Before the control module 12 determines the divergence of the plurality of feature points, the control module 12 needs to first track the plurality of feature points in the image frame. When the control module 12 is unable to track the plurality of feature points, the control module 12 continuously tracks the plurality of feature points in the next image frame captured by the image capturing unit 11 , which is repeatedly The plurality of feature points are tracked in the newly captured image frame. Additionally, when tracking the plurality of feature points, the control module 12 calculates a statistical value representative of the spatial distribution of the plurality of feature points. The statistical value may be an average intra-group distance between multiple groups in the image frame, or a variance between a plurality of groups, but the implementation manner of the present invention is not limited to the above.

The control module 12 can determine whether the plurality of feature points are moving toward a divergence trend according to the calculated statistical value. When the control module 12 determines, according to the calculated statistical value, whether the plurality of feature points are diverged outward from a central point position of the image frame, the control module 12 can provide the warning information to the driving driver through the warning module 13 .

In other embodiments of the present invention, before the control module 12 detects the plurality of feature points in a given area of the image frame, the control module 12 also detects an action in the image frame. An object contour, determining whether the contour of the moving object is detected, and when determining that the contour of the moving object is detected, continuously detecting the plurality of feature points in a given area of the image frame, wherein The given area is the outline of the action object, and the action object can be a car or a locomotive.

When the control module 12 determines that the plurality of feature points are diverging outward from a center point of the image frame, the control module 12 further determines whether a relative speed between the electronic device 10 and a front action object exceeds one. The threshold value is preset, and when the relative speed exceeds the preset threshold, the control module 12 can control the warning module 13 to provide a warning message to the driving driver.

When the control module 12 determines that the plurality of feature points are diverging outward from the center point of the image frame, the control module 12 can also directly determine the electronic device 10 and a front action object according to the calculated statistical value. Whether a relative speed between them exceeds a predetermined threshold. Since the captured image period of the image capturing unit 11 is fixed, for example, 30 image frames are captured every second, the control module 12 can be efficiently used according to the calculated statistical value and the known captured image period. The relative speed between the electronic device 10 and a front mobile object is inferred. When the control module 12 determines that the relative speed exceeds the preset threshold, the control module 12 can control the warning module 13 to provide the warning information to the driving driver.

FIG. 3 is a flow chart of a driving warning method according to the first embodiment of the present invention. Referring to FIG. 1 and FIG. 3 simultaneously, the driving warning method starts at step S302. In step S302, the control module 12 detects a plurality of feature points in a given area in an image frame. The given area may be a license plate or a body contour, and the plurality of feature points may refer to the schematic diagrams of the feature points shown in FIG. 2A to FIG. 2C due to the relative distance between the electronic device 10 and the preceding vehicle. In step S304, the control module 12 tracks the same plurality of feature points for a preset time. For example, FIGS. 2A to 2C show a plurality of feature points due to the relative distance between the electronic device 10 and the vehicle in front. Change and divergence or cohesion.

In step S306, the control module 12 calculates a statistical value representing the spatial distribution of the plurality of feature points. In step S308, the control module 12 determines the divergence of the plurality of feature points according to the calculated statistical value, and determines whether to control the control alert module 13 to provide a warning according to the divergence of the plurality of feature points. Information for driving drivers. After the step S308, the driving warning method ends. In actual operation, the above steps S302 to S308 may be performed cyclically to continuously perform the driving warning method, and provide warning information to the driving driver when determining that the relative distance to the preceding vehicle is too short.

4 is a flow chart of a driving alert method according to a second embodiment of the present invention. The steps of Figure 4 illustrate the technical content of Figure 3 in more detail. Referring to FIG. 1 and FIG. 4 simultaneously, the driving warning method starts at step S402. In step S402, the control module 12 detects a plurality of feature points in a given area in an image frame. In step S404, the control module 12 tracks the same plurality of feature points in the next image frame captured by the image capturing unit 11. In step S406, the control module 12 determines whether the same plurality of feature points are tracked. When the control module 12 determines that the same plurality of feature points are tracked, step S408 is performed after step S406. When the control module 12 determines that the same plurality of feature points are not tracked, the process returns to step S404 after step S406.

In step S408, the control module 12 calculates a statistical value representing the spatial distribution of the plurality of feature points. In step S410, the control module 12 determines, according to the calculated statistical value, whether the plurality of feature points are from a center point. The position diverges outward. When the control module 12 determines that the plurality of feature points are divergent, step S412 is continued after step S410. When the control module 12 determines that the plurality of feature points are not divergent, then returning to step S404 after step S410. In step S412, the control module 12 controls the control alert module 13 to provide a warning message to the driving driver. After the step S412, the driving warning method ends. In actual operation, the above steps S402 to S412 may be cyclically performed to continuously perform the driving warning method, and provide warning information to the driving driver when determining that the relative distance to the preceding vehicle is too short.

FIG. 5 is a flow chart of a driving warning method according to a third embodiment of the present invention. Steps S502 to S506 illustrated in FIG. 5 provide an initial value of the driving alert method, which provides a given range. Step S508 is similar to steps S402 to 412 in FIG. Please refer to FIG. 1 and FIG. 5 at the same time. The driving warning method illustrated in FIG. 5 starts at step S502. In step S502, the control module 12 waits for a preset waiting time, for example, 5 milliseconds (ms). In step S504, the control module 12 detects a license plate in an image frame captured by the image capturing unit 11. In step S506, the control module 12 determines whether a license plate is detected. When the control module 12 determines that a license plate is detected, step S508 is continued after step S506. When the control module 12 determines that a license plate is not detected, the process returns to step S502 after step S506 to re-detect a license plate in the latest image frame captured by the image capturing unit 11.

When the control module 12 determines that a license plate is detected, it means that the license plate can be used as a given range in the image frame. In step S508, The control module 12 determines the divergence of a plurality of feature values in a license plate region, and determines the control alert module 13 to provide a warning message to the driver based on the divergence of the plurality of feature values. After step S508, the driving alert method ends. In actual operation, the above steps S502 to S508 may be performed cyclically to continuously perform the driving warning method, and provide warning information to the driving driver when determining that the relative distance to the preceding vehicle is too short.

FIG. 6 is a flow chart of a driving warning method according to a fourth embodiment of the present invention. Steps S602 to S606 illustrated in FIG. 6 provide an initial value of the driving alert method, which provides a given range. Step S608 is similar to steps S402 to 412 in FIG. The given range in Figure 6 is to identify the body contour of a preceding vehicle and does not need to detect the license plate of the vehicle in front. Steps S602 to S608 are substantially similar to steps S502 to S508, and thus the related art content will not be repeated here. The difference between the driving warning method of FIG. 6 and FIG. 5 is that the control module 12 uses the moving object contour (that is, the vehicle body contour) in steps S604 to S608 instead of the license plate area used in steps S504 to S508. , as a given range required in the flow of the warning method.

FIG. 7 is a flow chart of a driving warning method according to a fifth embodiment of the present invention. The driving warning method illustrated in FIG. 7 is substantially similar to the driving warning method of FIG. 4, that is, steps S702 to S710 are similar to steps S402 to S410, and thus the related technical content is not repeated herein. Referring to FIG. 1 and FIG. 7 simultaneously, the driving warning method illustrated in FIG. 7 performs step S712 after step S710, and further determines the electronic device 10 by the control module 12. Whether a relative speed between the moving object (for example, a car) and the moving object in front (for example, another car) exceeds a preset threshold. The preset threshold value of the relative speed is, for example, +30 km/s, that is, the speed of the moving object where the electronic device 10 is located is more than 30 km/sec of the moving object in front. In step S712, the control module 12 can use the GPS module of the electronic device 10 to detect the relative speed between the current electronic device 10 and the moving object in front, but the implementation manner of the present invention is not limited to the above.

When the control module 12 determines that a relative speed between the mobile object and the front mobile object where the electronic device 10 is located does not exceed the preset threshold, the process returns to step S704 after step S712. When the control module 12 determines that a relative speed between the mobile object and the front mobile object where the electronic device 10 is located has exceeded a preset threshold, step S714 is followed by step S714. In step S714, the control module 12 controls the control alert module 13 to provide a warning message to the driving driver. After step S714, the driving alert method ends. In actual operation, the above steps S702 to S714 may be performed cyclically to continuously perform the driving warning method, and provide warning information to the driving driver when determining that the relative distance to the preceding vehicle is too short.

FIG. 8 is a flowchart of a driving warning method according to a sixth embodiment of the present invention. The driving warning method illustrated in FIG. 8 is substantially similar to the driving warning method of FIG. 7, and the steps S802 to S810 are similar to the steps S702 to S710, and thus the related technical content is not repeated herein. Referring to FIG. 1 and FIG. 8 simultaneously, the driving warning method illustrated in FIG. 8 first performs step S812 after step S810. In step S812, the control module 12 calculates The calculated statistical value determines whether a relative speed between the action object in which the electronic device 10 is located and the forward action object exceeds a preset threshold.

When the control module 12 determines that the relative speed between the mobile object and the front mobile object where the electronic device 10 is located does not exceed the preset threshold, the process returns to step S804 after step S812. When the control module 12 determines that the relative speed between the mobile object and the front mobile object where the electronic device 10 is located has exceeded the preset threshold, step S814 is followed by step S814. In step S814, the control module 12 controls the control alert module 13 to provide a warning message to the driving driver. After the step S814, the driving warning method ends. In actual operation, the above steps S802 to S814 may be performed cyclically to continuously perform the driving warning method, and provide warning information to the driving driver when determining that the relative distance to the preceding vehicle is too short.

The present invention further provides a computer program product for storing a computer executable program for performing the steps of the above-described driving alert method. The computer program product is basically composed of a plurality of code segments (for example After the organization chart code segment, signing the form code segment, setting the code segment, and deploying the code segment, and the code segments are loaded into the electronic device and executed, the steps of the driving warning method can be completed. And the functions of the above electronic device.

In summary, various embodiments of the present invention provide a driving alert method and an electronic device thereof and a computer program product thereof. By detecting a plurality of feature points in a given area in an image frame, and tracking the plurality of feature points, and calculating a statistical value representing a spatial distribution of the plurality of feature points. Then, according to The calculated statistical value determines the divergence of the plurality of feature points, and accordingly determines whether to provide warning information to the driving driver. In this way, it is possible to quickly determine whether there is a probability of colliding with the vehicle without adding additional hardware and a short calculation time, and alert the driver accordingly.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone having ordinary knowledge in the technical field can protect the case without any deviation and refinement within the spirit and scope of the present case. The scope is subject to the definition of the scope of the patent application attached.

10‧‧‧Electronic devices

11‧‧‧Image capture unit

12‧‧‧Control Module

13‧‧‧Warning module

201, 202, 203‧‧‧ image frames

21‧‧‧ body

22‧‧‧ License Plate

P1, P2, P3, P4, P5, S1, S2, S3, S4, S5‧‧‧ feature points

Steps of the S302~S308, S402~S412, S502~S508, S602~S608, S702~S714, S802~S814‧‧‧ human-machine interface presentation methods

FIG. 1 is a functional block diagram of an electronic device according to an embodiment of the present invention.

2A-2C are schematic diagrams showing tracking of a plurality of feature points on an object according to an embodiment of the present invention.

FIG. 3 is a flow chart of a driving warning method according to the first embodiment of the present invention.

4 is a flow chart of a driving alert method according to a second embodiment of the present invention.

FIG. 5 is a flow chart of a driving warning method according to a third embodiment of the present invention.

FIG. 6 is a flow chart of a driving warning method according to a fourth embodiment of the present invention.

FIG. 7 is a flow chart of a driving warning method according to a fifth embodiment of the present invention.

FIG. 8 is a flowchart of a driving warning method according to a sixth embodiment of the present invention.

S302~S308‧‧‧Steps for driving warning method

Claims (17)

A driving warning method is applicable to an electronic device, the method comprising: detecting, by the electronic device, a plurality of feature points in a given area in an image frame; using the electronic device in a preset time Tracking the plurality of feature points; calculating, by the electronic device, a statistical value representing a spatial distribution of the plurality of feature points; determining, by the electronic device, whether the plurality of feature points are controlled by a center according to the calculated statistical value The point diverges outward; and when the plurality of feature points are diverging outward from the center point, the electronic device is utilized to provide a warning message to the driver of the line of vehicles. The method of claim 1, wherein the step of tracking the plurality of feature points within the preset time comprises: determining, by the electronic device, whether the plurality of feature points are tracked; and when the When a plurality of feature points are described, the electronic device continuously tracks the plurality of feature points in a next image frame. The method of claim 1, further comprising: determining, by the electronic device, whether a license plate is detected in the image frame; and when determining that the license plate is detected, setting the given by the electronic device The fixed area is the license plate. The method of claim 3, further comprising: when determining that the license plate is not detected, using the electronic device to wait for a preset time; and after the preset time, detecting the electronic device A license plate in an image frame. The method of claim 1, further comprising: determining, by the electronic device, whether an active object contour is detected in the image frame; and using the electronic device when determining that the contour of the mobile object is detected The device sets the given area as the contour of the moving object. The method of claim 5, further comprising: when determining that the contour of the mobile object is not detected, using the electronic device to wait for a preset time; and after the preset time, using the electronic device Detect the outline of a moving object in an image frame. The method of claim 1, further comprising: determining, by the electronic device, whether a relative speed between the electronic device and an object exceeds a predetermined threshold; and when the relative speed exceeds the preset threshold The warning information is provided to the driving driver by the electronic device. The method of claim 1, further comprising: determining, according to the calculated statistical value, whether the relative speed of one of the electronic device and an object exceeds a predetermined threshold value; and when the relative When the speed exceeds the preset threshold, the electronic device is utilized Provide this warning message to the driving driver. An electronic device includes: an image capturing unit for capturing at least one image to generate a corresponding image frame; and a control module coupled to the image capturing unit for detecting an image image Locating a plurality of feature points in a given area and tracking the plurality of feature points for a preset time to calculate a statistical value representing a spatial distribution of the plurality of feature points, and calculating according to the calculation a statistic value, determining a divergence condition of the plurality of feature points, wherein the control module determines, according to the calculated statistical value, whether the plurality of feature points are diverged outward from a center point; and a warning module, connecting The control module is configured to receive a control signal of the control module, and when the control module determines to provide a warning message to the driver of the row of vehicles according to the divergence condition, outputting the warning message, wherein the plurality of When the feature point is diverging outward from the center point, the control module controls the warning module to provide the warning message to the driving driver. The electronic device of claim 9, wherein: the control module further tracks the plurality of feature points in an image frame; the control module further determines whether the plurality of feature points are tracked And when the control module is unable to track the plurality of feature points, the control module continuously tracks the plurality of feature points in a next image frame captured by the image capturing unit. The electronic device of claim 9, wherein the electronic device The control module further detects a license plate in the image frame to determine whether the license plate is detected, and when the control module detects the license plate, the control module detects the image frame The plurality of feature points within the predetermined area, wherein the given area is the license plate. The electronic device of claim 11, wherein when the control module determines that the license plate is not detected, waiting for a preset time, and after the preset time, the control module detects the A license plate in the next image frame captured by the image capture unit. The electronic device of claim 9, wherein the control module detects the image before the control module detects the plurality of feature points in the given area of the image frame. a contour of the moving object in the frame, determining whether the contour of the moving object is detected, and when the control module determines that the contour of the moving object is detected, the control module successively detects the image frame The plurality of feature points within the predetermined area, wherein the given area is the active object outline. The electronic device of claim 13, wherein when the control module determines that the contour of the mobile object is not detected, waiting for a preset time, and after the preset time, the control module continues Detecting an outline of a moving object in the next image frame captured by the image capturing unit. The electronic device of claim 9, wherein the control module further determines the electronic device and a front mobile object when the control module determines that the plurality of feature points are diverging outward from the center point Whether a relative speed between them exceeds a predetermined threshold, and when the relative When the speed exceeds the preset threshold, the control module controls the warning module to provide the warning information to the driving driver. The electronic device of claim 9, wherein when the control module determines that the plurality of feature points are diverging outward from the center point, the control module determines the electronic device according to the calculated statistical value. Whether a relative speed between the device and a front mobile object exceeds a predetermined threshold, and when the relative speed exceeds the preset threshold, the control module controls the warning module to provide the warning information to the driving By. A computer program product storing a computer executable program for causing the electronic device to perform at least the method of claim 1 when the computer executable program is loaded into an electronic device.