CN113923447A - Delay test method for vehicle panoramic all-round looking test - Google Patents
Delay test method for vehicle panoramic all-round looking test Download PDFInfo
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Abstract
The invention relates to the technical field of automobile testing, in particular to a delay testing method for a vehicle panoramic all-round looking test, which comprises the following steps: s1, arranging cameras in four directions of the vehicle to be detected, wherein the cameras comprise fisheye lens modules; s2, acquiring original images of four directions shot by the camera, and recording shooting time of the original images of the four directions; s3, splicing the original images in the four directions to obtain a panoramic all-around image, and recording the splicing completion time of the panoramic all-around image; s4, displaying the panoramic all-round looking image, and recording the display time of the panoramic all-round looking image; and S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a panoramic all-around delay test report of the vehicle to be tested. The invention can test the whole delay performance of the panoramic all-around viewing function of the vehicle to be tested, and can also test the delay performance of the cameras in four directions of the vehicle to be tested respectively.
Description
Technical Field
The invention relates to the technical field of automobile panoramic tests, in particular to a delay test method for a vehicle panoramic all-round-looking test.
Background
With the rapid development of economy in China, the quantity of automobiles kept by residents is increased year by year, and the adoption of automobile traveling becomes the normal state of office workers, so that the roads of various cities are frequently congested in early peak and late peak. When parking, in order to avoid the unexpected events such as scraping, collision etc. to appear in the driver, all arranged the panorama function on the vehicle basically, formed the 360 degrees panorama top views of seamless vehicle all around on the car machine display screen to improve the security of parking.
In order to test the panoramic function before the vehicle leaves a factory, a panoramic looking-around image needs to be acquired. To this end, there are related technologies disclosed in chinese patents, cameras are arranged in four directions, front, rear, left and right, of a vehicle to be tested, that is, a front camera is arranged in front of the vehicle to be tested, a left camera is arranged on the left side of the vehicle to be tested, a right camera is arranged on the right side of the vehicle to be tested, a rear camera is arranged behind the vehicle to be tested, the four cameras arranged front, rear, left and right include fisheye lens modules with the same structure, the wide angle of the fisheye lens module is 190 °, then, image information shot by the four cameras arranged front, rear, left and right is acquired, and the image information is spliced, thereby obtaining a panoramic image for display. According to the technical scheme, the obtained image information can be used for generating the panoramic all-round view image, so that the panoramic view covers the view angle range of the vehicle, and the view field of a driver is expanded.
However, the prior art does not recognize the problem of system delay, and the system delay of the vehicle panoramic looking-around system mainly comprises two parts: the method comprises the following steps that firstly, local delay is adopted, namely camera delay is adopted, namely the camera delay is the delay among cameras for collecting images, and the mutual delay among the cameras in the shooting process is realized; the second is "integral delay", which refers to the delay of the process of "shooting-splicing" and the delay of the process of "splicing-displaying". Therefore, in the above technical solution, although the obtained image information can be used to generate the panoramic all-around view image, so that the panoramic view covers the view angle range of the vehicle, the delay performance of the panoramic all-around view function of the vehicle to be tested cannot be tested.
Disclosure of Invention
The invention provides a delay test method for a vehicle panoramic all-round looking test, which solves the technical problem that the prior art can not test the delay performance of the panoramic all-round looking function of a vehicle to be tested.
The basic scheme provided by the invention is as follows: a delay test method for a vehicle panoramic looking-around test, comprising:
s1, arranging cameras in four directions of the vehicle to be tested;
s2, acquiring original images of four directions shot by the camera, and recording shooting time of the original images of the four directions;
s3, splicing the original images in the four directions to obtain a panoramic all-around image, and recording the splicing completion time of the panoramic all-around image;
s4, displaying the panoramic all-round looking image, and recording the display time of the panoramic all-round looking image;
and S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a panoramic all-around delay test report of the vehicle to be tested.
The working principle and the advantages of the invention are as follows:
(1) the four cameras shoot original images in four directions, and the shooting time of the original images in the four directions is recorded, namely the total recorded four times, if the shooting time of the original images in the four directions is synchronous, the same or no difference exists, the four cameras are not delayed, the shooting time of the original images in the four directions can be regarded as one time, and the shooting time of the original image in any one direction can represent the whole shooting time of the original images in the four directions; in addition, the splicing completion time is the time for splicing the original images in four directions to obtain the panoramic annular view image, the display time is the time for displaying the panoramic annular view image, and both the two times are only one time, so that the delay of the whole 'shooting-splicing' process and the delay of the 'splicing-displaying' process can be analyzed according to the shooting time of the original images, the splicing completion time of the panoramic annular view image and the display time of the panoramic annular view image, and the whole delay performance of the panoramic annular view function of the vehicle to be tested can be tested;
(2) the four cameras shoot original images in four directions, and the shooting time of the original images in the four directions is recorded, namely the total four recorded times, if the shooting time of the original images in the four directions is asynchronous, different or different, the fact that delay exists among the four cameras is shown, the mutual delay among the four cameras in the shooting process can be analyzed according to the shooting time of the original images in the four directions, and therefore the camera delay performance of the panoramic looking-around function of the vehicle to be tested can be tested;
(3) the scheme also overcomes the technical prejudice for the following reasons: in order to improve the accuracy of the panoramic all-round viewing function of the vehicle to be detected, the improvement is basically carried out from the aspects of improving the definition, pixels and the like of an original picture and an all-round viewing picture without considering the problem of system delay of the panoramic all-round viewing function; the system delay of the vehicle panoramic all-around system is divided into local delay and integral delay, wherein the local delay, namely camera delay, refers to the delay among cameras for collecting images, and the mutual delay among the cameras in the shooting process is delayed; the "overall delay" refers to the delay of the "shooting-stitching" process and the delay of the "stitching-displaying" process. Therefore, the scheme considers the local delay and the overall delay at the same time, tests the local delay and the overall delay of the vehicle to be tested, improves the accuracy of the panoramic look-around delay test report, and overcomes the technical bias.
The method can test the whole delay performance of the panoramic looking-around function of the vehicle to be tested, and can also test the delay performance of the cameras in four directions of the vehicle to be tested respectively, thereby solving the technical problem that the delay performance of the panoramic looking-around function of the vehicle to be tested cannot be tested.
Further, in S2, a light source is disposed right in front of each camera, a first photo detector is disposed near the light source, and the first photo detector is in signal connection with the multi-channel oscilloscope; in S3, arranging a second photoelectric detector at a corresponding position displayed by each light source in the picture of the spliced panoramic all-around image, wherein the second photoelectric detector is connected with a multi-channel oscilloscope in a signal mode; in S4, arranging a third photoelectric detector at a corresponding position displayed by each light source in the picture of the displayed panoramic all-around image, wherein the third photoelectric detector is connected with a multi-channel oscilloscope in a signal mode;
in S5, simultaneously turning on a light source, and observing a displayed waveform in a multi-channel oscilloscope; acquiring the cycle time of a signal detected by a first photoelectric detector, and calculating the shooting time; acquiring the cycle time of a signal detected by a second photoelectric detector, and calculating the splicing completion time; acquiring the cycle time of a signal detected by a third photoelectric detector, and calculating the display time; and obtaining data delay among the cameras according to the shooting time, obtaining spliced data delay according to the shooting time and the splicing completion time, and obtaining displayed data delay according to the splicing completion time and the display time.
Has the advantages that:
(1) the first photoelectric detector, the second photoelectric detector and the third photoelectric detector can be used for rapidly acquiring signals, so that the shooting time, the splicing completion time and the display time can be rapidly obtained; meanwhile, the shooting time, the splicing completion time and the display time are automatically calculated according to the cycle time of the detected signal, so that the accuracy is high and the error is small;
(2) the shooting time is calculated according to the cycle time of the signal detected by the first photodetector, similarly, the splicing completion time is calculated according to the cycle time of the signal detected by the second photodetector, and the display time is calculated according to the cycle time of the signal detected by the third photodetector, so that the shooting time, the splicing completion time, and the display time are essentially obtained according to the waveform characteristics (mainly the cycle time) of the signal detected by the first photodetector, the signal detected by the second photodetector, and the signal detected by the third photodetector, compared with the time when the signal of the light source is directly recorded by the first photodetector, the second photodetector, and the third photodetector, the self-error of the process of recording time is avoided, and the accuracy of the shooting time, the splicing completion time, and the display time is improved, the accuracy of comparison of the shooting time, the splicing completion time and the display time is improved, and the accuracy of the test report of the switched picture delay is improved.
Further, in S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic surround view image, and the display time of the panoramic surround view image, to obtain a panoramic surround view delay test report of the vehicle to be tested, including:
calculating a time difference value between the shooting time of the original image and the splicing completion time of the panoramic all-around image to obtain a first time difference value;
calculating a time difference value between the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a second time difference value;
and judging whether the delay performance of the panoramic all-round looking function of the vehicle to be tested meets the requirement or not according to the magnitude relation between the first time difference value and the first difference threshold value and the magnitude relation between the second time difference value and the second difference threshold value, and obtaining a panoramic all-round looking delay test report of the vehicle to be tested.
Has the advantages that: the time difference between the shooting time of the original image and the splicing completion time of the panoramic annular view image can be regarded as splicing delay, and the time difference between the splicing completion time of the panoramic annular view image and the display time of the panoramic annular view image can be regarded as display delay, so that the splicing delay performance and the display delay performance can be tested simultaneously, and the test efficiency is improved.
Further, in S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic surround view image, and the display time of the panoramic surround view image, to obtain a panoramic surround view delay test report of the vehicle to be tested, including:
calculating time difference values of shooting time of original images in four directions and splicing completion time of the panoramic all-around images one by one to obtain first time difference values in the four directions;
and judging whether the delay performance of the panoramic all-round looking function of the vehicle to be tested in the four directions meets the requirement one by one according to the magnitude relation between the first time difference values in the four directions and the first difference threshold value, and obtaining a panoramic all-round looking delay test report of the vehicle to be tested.
Has the advantages that: by the mode, the delay performance in each camera area can be tested, and the test accuracy is improved.
Further, in S3, the original images in the four directions are stitched to obtain a panoramic all-around view image, and the stitching offset amount within 2m from the actual vehicle to be measured in the panoramic all-around view image is less than 3% of the view width.
Has the advantages that: compared with the situation that the dislocation quantity observed by naked eyes meets the requirement of a given range, the splicing dislocation requirement is set, so that the spliced dislocation quantity is easier to control accurately.
Further, in S3, original images in four directions are spliced to obtain a panoramic all-around view image, and the splicing loss amount of the panoramic all-around view image within 2m from the vehicle to be tested and below 1m from the ground is less than 0.3 m.
Has the advantages that: compared with the situation that the loss amount observed by naked eyes meets the requirement of a given range, the splicing loss requirement is set, so that the splicing loss amount after splicing is easier to control accurately.
Further, in S3, the original images in the four directions are stitched to obtain a panoramic annular view image, and the pixel area occupied by the stitching gaps in the panoramic annular view image is less than 2% of the whole screen.
Has the advantages that: compared with the situation that no seam visible to naked eyes exists in the panoramic image, the requirement of the splicing seam is set, so that the spliced splicing seam is easier to control accurately.
Further, in S3, the original images in the four directions are stitched to obtain a panoramic annular view image, and there is no object ghost in the panoramic annular view image.
Has the advantages that: the requirement of splicing ghosting is set in this way, and no object ghosting exists after splicing.
Further, in S3, before the original images in the four directions are spliced, the sharpness of all the original images is processed to obtain an original image in which the horizontal sharpness and the vertical sharpness of each test point are higher than 200 LW/PH.
Has the advantages that: compared with the situation that the horizontal definition and the vertical definition of each test point of the original image are reduced by no more than 70%, the definition requirement of the picture is set, and the definition of the processed original image is higher.
Further, in S3, before the original images in the four directions are stitched, the original images are subjected to sharpness processing, so as to ensure that the number of test points, in which the horizontal sharpness and the vertical sharpness of the original images are both higher than 200LW/PH, exceeds 60% of the total number of the test points.
Has the advantages that: compared with the situation that the number of test points of which the horizontal definition and the vertical definition of the original image are both higher than 150LW/PH exceeds 60 percent of the total number of test points of the original image, the picture definition requirement is set, and the definition of the processed original image is higher and more uniform.
Drawings
Fig. 1 is a flowchart of an embodiment of a delay test method for a vehicle panoramic looking-around test according to the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
example 1
An embodiment is substantially as shown in figure 1, comprising:
s1, arranging cameras in four directions of the vehicle to be detected, wherein the cameras comprise fisheye lens modules;
s2, acquiring original images of four directions shot by the camera, and recording shooting time of the original images of the four directions;
s3, splicing the original images in the four directions to obtain a panoramic all-around image, and recording the splicing completion time of the panoramic all-around image;
s4, displaying the panoramic all-round looking image, and recording the display time of the panoramic all-round looking image;
and S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a panoramic all-around delay test report of the vehicle to be tested.
The specific implementation process is as follows:
s1, arranging cameras in four directions of the vehicle to be tested, wherein the cameras comprise fisheye lens modules. For example, four cameras are arranged in the front direction, the rear direction, the left direction and the right direction of a vehicle to be detected, each camera comprises a fisheye lens module, and the wide angle of each fisheye lens module is 190 degrees.
And S2, acquiring the original images of the four directions shot by the camera, and recording the shooting time of the original images of the four directions. For example, after the four cameras are started simultaneously, the original images of the vehicle to be detected in the front direction, the rear direction, the left direction and the right direction are respectively collected; after the acquisition is finished, the shooting time of the original images in the front, back, left and right directions is recorded, and the format of the shooting time is multiplied by year, month, day, minute, second and millisecond.
And S3, splicing the original images in the four directions to obtain a panoramic all-around image, and recording the splicing completion time of the panoramic all-around image. In this embodiment, the original images in four directions are spliced to obtain a panoramic all-around image, and the following requirements are required to be met: firstly, the splicing dislocation amount within 2m from the actual vehicle to be detected in the panoramic all-around view image is lower than 3% of the view width, so that the splicing dislocation amount after splicing is easier to control accurately; secondly, the splicing loss amount of the panoramic all-around image within 2m from the vehicle to be tested and below 1m from the ground is less than 0.3 m, so that the spliced splicing loss amount is easier to control accurately; thirdly, the pixel area occupied by the splicing gaps in the panoramic image is less than 2% of the whole image, so that the spliced splicing gaps are easier to accurately control; and fourthly, no object ghost image appears in the panoramic all-around image, and the spliced object ghost image is ensured not to exist.
And S4, displaying the panoramic all-around image, and recording the display time of the panoramic all-around image. For example, the spliced panoramic view image is displayed on the display screen, and the display time on the display screen at this time, that is, the display time of the panoramic view image is recorded in a format of × year × month × day × time × minute × second × millisecond.
And S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a panoramic all-around delay test report of the vehicle to be tested. In this embodiment, the panoramic surround view delay test report of the vehicle to be tested is obtained by analyzing the shooting time of the original image, the splicing completion time of the panoramic surround view image, and the display time of the panoramic surround view image, and specifically includes:
the method comprises the steps of firstly, calculating a time difference value between the shooting time of an original image and the splicing completion time of a panoramic all-around image to obtain a first time difference value;
secondly, calculating a time difference value between the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a second time difference value;
thirdly, judging whether the delay performance of the panoramic looking-around function of the vehicle to be tested meets the requirement or not according to the magnitude relation between the first time difference value and the first difference threshold value and the magnitude relation between the second time difference value and the second difference threshold value, and obtaining a panoramic looking-around delay test report of the vehicle to be tested; wherein the first difference threshold is 0.35 seconds and the second difference threshold is 0.5 seconds.
The time difference between the shooting time of the original image and the splicing completion time of the panoramic annular view image can be regarded as splicing delay, and the time difference between the splicing completion time of the panoramic annular view image and the display time of the panoramic annular view image can be regarded as display delay, so that the splicing delay performance and the display delay performance can be tested simultaneously, and the test efficiency is improved. In this embodiment, the four cameras shoot original images in four directions, and the shooting time of the original images in the four directions is recorded, that is, the total recorded four times, if the shooting time of the original images in the four directions is synchronous, the same or no difference, it is indicated that there is no delay between the four cameras, the shooting time of the original images in the four directions can be regarded as one time, and the shooting time of the original image in any one direction can represent the whole shooting time of the original images in the four directions; in addition, the splicing completion time is the time for splicing the original images in four directions to obtain the panoramic all-around image, the display time is the time for displaying the panoramic all-around image, and both the two times are only one time, so that the overall 'shooting-splicing' delay and 'splicing-display' process delay can be analyzed according to the shooting time of the original images, the splicing completion time of the panoramic all-around image and the display time of the panoramic all-around image, and the overall delay performance of the panoramic all-around function of the vehicle to be tested can be tested.
Meanwhile, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a panoramic all-around delay test report of the vehicle to be tested, and the method specifically comprises the following steps of: calculating time difference values of shooting time of original images in four directions and splicing completion time of the panoramic all-around images one by one to obtain first time difference values in the four directions; and judging whether the delay performance of the panoramic all-round looking function of the vehicle to be tested in the four directions meets the requirement one by one according to the magnitude relation between the first time difference values in the four directions and the first difference threshold value, and obtaining a panoramic all-round looking delay test report of the vehicle to be tested. By the mode, the delay performance in each camera area can be tested, and the test accuracy is improved. In this embodiment, the four cameras shoot the original images in the four directions, and the shooting time of the original images in the four directions is recorded, that is, the total recorded four times, if the shooting time of the original images in the four directions is not synchronous, different or different, it is indicated that the four cameras have delay, and the delay between the four cameras in the shooting process can be analyzed according to the shooting time of the original images in the four directions, so that the camera delay performance of the panoramic all-round function of the vehicle to be tested can be tested.
Example 2
The only difference from embodiment 1 is that in S3, the original images in the four directions are stitched before: performing definition processing on all original images to obtain original images with horizontal definition and vertical definition of each test point higher than 200LW/PH, and ensuring higher definition of the processed original images; the original image is subjected to definition processing, the number of test points with the horizontal definition and the vertical definition of the original image both higher than 200LW/PH is ensured to exceed 60 percent of the total number of the test points, and the definition of the processed original image is ensured to be higher and more uniform.
Example 3
The difference from the example 2 is only that the variation range of the test time is 0 to 0.35 seconds,
in S2, a light source is arranged right in front of each camera, a first photoelectric detector is arranged near the light source (for example, 10-20 cm), and the first photoelectric detector is in signal connection with the multi-channel oscilloscope. That is, the cameras in the four directions all correspond to one light source, for example, an LED light source, each light source corresponds to one first photodetector, and the first photodetectors are in signal connection with the multi-channel oscilloscope in a wireless or wired manner. In the embodiment, the brightness of the light source can be automatically adjusted according to an arithmetic series or geometric series, so that the brightness change of the light source can be approximately simulated to the brightness change of daily sunlight, the natural condition of the actual operation of the vehicle to be tested can be restored as far as possible, the test process is more in line with the actual condition, and the authenticity and the accuracy of the test result are improved.
And S3, arranging a second photoelectric detector at the corresponding position displayed by each light source in the picture of the spliced panoramic all-around image, wherein the second photoelectric detector is connected with a multi-channel oscilloscope through signals. That is, each light source in the picture of the spliced panoramic all-around image corresponds to one second photoelectric detector, and the second photoelectric detectors are in signal connection with the multi-channel oscilloscope in a wireless or wired mode.
And in S4, arranging a third photoelectric detector at the corresponding position displayed by each light source in the picture of the displayed panoramic all-around image, wherein the third photoelectric detector is connected with a multi-channel oscilloscope through signals. That is, each light source in the picture of the displayed panoramic all-around image corresponds to one third photoelectric detector, and the third photoelectric detector is in signal connection with the multi-channel oscilloscope in a wireless or wired mode.
In S5, first, the light sources are turned on simultaneously, and displayed waveforms formed by the signal detected by the first photodetector, the signal detected by the second photodetector, and the signal detected by the third photodetector are observed in the multi-channel oscilloscope. Then, acquiring the cycle time of the signal detected by the first photoelectric detector, and calculating the shooting time; acquiring the cycle time of a signal detected by a second photoelectric detector, and calculating the splicing completion time; acquiring the cycle time of a signal detected by a third photoelectric detector, and calculating the display time; the calculation process can be implemented by referring to the prior art, and is not described in detail herein. In this embodiment, the first photodetector, the second photodetector, and the third photodetector are used to quickly acquire signals, so as to quickly obtain the shooting time, the splicing completion time, and the display time; meanwhile, the shooting time, the splicing completion time and the display time are automatically calculated according to the cycle time of the detected signal, so that the accuracy is high and the error is small.
Finally, the data delay between the cameras is obtained according to the shooting time, the spliced data delay is obtained according to the shooting time and the splicing completion time, and the displayed data delay is obtained according to the splicing completion time and the display time, which can be understood by referring to the above embodiment. The system delay time is tested to be between about 0.15 and 0.2 seconds, and the individual camera delay time is between about 0.05 and 0.18 seconds. In this embodiment, the shooting time is calculated according to the cycle time of the signal detected by the first photodetector, similarly, the splicing completion time is calculated according to the cycle time of the signal detected by the second photodetector, and the display time is calculated according to the cycle time of the signal detected by the third photodetector, so that the shooting time, the splicing completion time, and the display time are essentially obtained according to the waveform characteristics (mainly the cycle time) of the signal detected by the first photodetector, the signal detected by the second photodetector, and the signal detected by the third photodetector, and compared with the time when the signal of the light source is detected by directly recording the first photodetector, the second photodetector, and the third photodetector, the error of the process of recording the time is avoided, and the accuracy of the shooting time, the splicing completion time, and the display time is improved, the accuracy of comparison of the shooting time, the splicing completion time and the display time is improved, and the accuracy of the test report of the switched picture delay is improved.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A delay test method for a vehicle panoramic looking-around test is characterized by comprising the following steps:
s1, arranging cameras in four directions of the vehicle to be tested;
s2, acquiring original images of four directions shot by the camera, and recording shooting time of the original images of the four directions;
s3, splicing the original images in the four directions to obtain a panoramic all-around image, and recording the splicing completion time of the panoramic all-around image;
s4, displaying the panoramic all-round looking image, and recording the display time of the panoramic all-round looking image;
and S5, analyzing according to the shooting time of the original image, the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a panoramic all-around delay test report of the vehicle to be tested.
2. The delay test method for the panoramic looking-around test of the vehicle according to claim 1,
in S2, a light source is arranged right in front of each camera, a first photoelectric detector is arranged near the light source, and the first photoelectric detector is in signal connection with a multi-channel oscilloscope;
in S3, arranging a second photoelectric detector at a corresponding position displayed by each light source in the picture of the spliced panoramic all-around image, wherein the second photoelectric detector is connected with a multi-channel oscilloscope in a signal mode;
in S4, arranging a third photoelectric detector at a corresponding position displayed by each light source in the picture of the displayed panoramic all-around image, wherein the third photoelectric detector is connected with a multi-channel oscilloscope in a signal mode;
in S5, simultaneously turning on a light source, and observing a displayed waveform in a multi-channel oscilloscope; acquiring the cycle time of a signal detected by a first photoelectric detector, and calculating the shooting time; acquiring the cycle time of a signal detected by a second photoelectric detector, and calculating the splicing completion time; acquiring the cycle time of a signal detected by a third photoelectric detector, and calculating the display time; and obtaining data delay among the cameras according to the shooting time, obtaining spliced data delay according to the shooting time and the splicing completion time, and obtaining displayed data delay according to the splicing completion time and the display time.
3. The delay test method for the panoramic all-round looking test of the vehicle as claimed in claim 1, wherein in S5, the panoramic all-round looking delay test report of the vehicle to be tested is obtained by analyzing the shooting time of the original image, the splicing completion time of the panoramic all-round looking image and the display time of the panoramic all-round looking image, comprising:
calculating a time difference value between the shooting time of the original image and the splicing completion time of the panoramic all-around image to obtain a first time difference value;
calculating a time difference value between the splicing completion time of the panoramic all-around images and the display time of the panoramic all-around images to obtain a second time difference value;
and judging whether the delay performance of the panoramic all-round looking function of the vehicle to be tested meets the requirement or not according to the magnitude relation between the first time difference value and the first difference threshold value and the magnitude relation between the second time difference value and the second difference threshold value, and obtaining a panoramic all-round looking delay test report of the vehicle to be tested.
4. The delay test method for the panoramic all-round looking test of the vehicle as claimed in claim 3, wherein in the step S5, the panoramic all-round looking delay test report of the vehicle to be tested is obtained by analyzing the shooting time of the original image, the splicing completion time of the panoramic all-round looking image and the display time of the panoramic all-round looking image, and the method comprises the following steps:
calculating time difference values of shooting time of original images in four directions and splicing completion time of the panoramic all-around images one by one to obtain first time difference values in the four directions;
and judging whether the delay performance of the panoramic all-round looking function of the vehicle to be tested in the four directions meets the requirement one by one according to the magnitude relation between the first time difference values in the four directions and the first difference threshold value, and obtaining a panoramic all-round looking delay test report of the vehicle to be tested.
5. The delay test method for the panoramic looking-around test of the vehicle as claimed in claim 4, wherein in S3, the original images in four directions are spliced to obtain the panoramic looking-around image, and the splicing displacement amount within 2m of the actual distance from the vehicle to be tested in the panoramic looking-around image is less than 3% of the view width.
6. The delay test method for the vehicle panoramic all-round test as recited in claim 4, wherein in S3, the original images in four directions are stitched to obtain the panoramic all-round image, and the stitching loss within 2m from the vehicle to be tested and below 1m from the ground in the panoramic all-round image is less than 0.3 m.
7. The delay test method for the panoramic looking-around test of the vehicle of claim 4, wherein in the step S3, the original images in four directions are spliced to obtain the panoramic looking-around image, and the pixel area occupied by the splicing gaps in the panoramic looking-around image is less than 2% of the whole image.
8. The delay test method for the panoramic looking-around test of the vehicle of claim 4, wherein in the step S3, the original images in four directions are spliced to obtain the panoramic looking-around image, and the panoramic looking-around image has no object ghost.
9. The delay test method for the panoramic all-around test of the vehicle according to claim 8, wherein in S3, before splicing the original images in the four directions, all the original images are processed by definition to obtain the original images with horizontal definition and vertical definition higher than 200LW/PH at each test point.
10. The delay test method for the panoramic all-round test of the vehicle according to claim 9, wherein in S3, before the original images in the four directions are spliced, the original images are subjected to sharpness processing, and the number of test points of which the horizontal sharpness and the vertical sharpness are both higher than 200LW/PH exceeds 60% of the total number of the test points.
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