CN110446032B - Method for testing synchronization of exposure time of multiple lenses of panoramic camera - Google Patents

Method for testing synchronization of exposure time of multiple lenses of panoramic camera Download PDF

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Publication number
CN110446032B
CN110446032B CN201910806729.0A CN201910806729A CN110446032B CN 110446032 B CN110446032 B CN 110446032B CN 201910806729 A CN201910806729 A CN 201910806729A CN 110446032 B CN110446032 B CN 110446032B
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exposure time
turntable
lens
panoramic camera
pointer
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CN110446032A (en
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王超
甄国文
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Pi Technology Changzhou Co ltd
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Pi Technology Changzhou Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/95—Computational photography systems, e.g. light-field imaging systems
    • H04N23/957—Light-field or plenoptic cameras or camera modules

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Studio Devices (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

The embodiment of the invention provides a method for testing the synchronization of the exposure time of multiple shots of a panoramic camera, which comprises the following steps: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the exposure time of the lenses is to be tested, and the testing device comprises a turntable with a motor. The method comprises the following steps: when the turntable rotates according to the preset rotating speed of the motor, the lens of the exposure time to be detected in the panoramic camera is controlled to shoot image data which comprises imaging in a mirror corresponding to the lens of the exposure time to be detected, so that the exposure time of the lens of the exposure time to be detected is determined according to the fan-shaped smear angle of the pointer shot in the image data, the difference value of any two exposure times is determined to be in a first preset range, and then the exposure time synchronization of the lens of any two exposure times is determined. The method provides a brand-new exposure time synchronous detection scheme for the multi-lens module in the panoramic camera field, and has the advantages of simple layout, high flexibility, small system building difficulty and easiness in maintenance.

Description

Method for testing synchronization of exposure time of multiple lenses of panoramic camera
Technical Field
The invention relates to the field of image pickup, in particular to a method for testing multi-lens exposure time synchronization of a panoramic camera.
Background
In the panoramic field, a panoramic camera consists of two or more lens modules, different lens modules independently image, and then images shot by the lens modules are spliced together through a stitching algorithm, so that a 360-degree panoramic image is formed. Since a panoramic image is stitched from images imaged by a plurality of lens modules, to stitch a good image, the various attribute parameters of the images before stitching must be consistent or very close, including exposure time synchronization. Currently, the field of panoramic photography belongs to an emerging field, mass production of panoramic cameras requires batch testing, and up to now no measurement scheme for whether exposure times of a plurality of lenses of the panoramic cameras are synchronous has occurred.
In the scheme of measuring exposure time by a non-panoramic image pickup apparatus, one technique is to light LEDs on an array one by one using an LED array, a panoramic camera shoots an image on the LED array, and the exposure time of the panoramic camera is calculated by checking the number of LEDs shot to light on the image and combining the frequency of lighting of the LEDs. Another technique is to use two sets of rotating mirrors to project the light of the point light source onto the reflecting plate, and calculate the exposure time of the panoramic camera by combining the number of bright lines on the imaging reflecting plate and the rotation speed of the mirrors. The existing exposure time detection technology is low in precision, poor in flexibility, complex in system, high in system building difficulty, too simple in mode and low in precision.
Therefore, in the field of panoramic camera production, there is a need to provide a scheme for testing the multi-lens exposure time synchronization of a panoramic camera, and a scheme for improving the precision of the exposure time synchronization detection technology and enhancing the flexibility of the exposure time synchronization detection technology.
Disclosure of Invention
The embodiment of the invention provides a multi-lens exposure time synchronization method for testing a panoramic camera, which is used for improving the precision and the flexibility of the exposure time synchronization detection technology.
In one aspect, an embodiment of the present invention provides a method for testing exposure time synchronization of multiple shots of a panoramic camera, where the method is applied to a system for testing exposure time of multiple shots of a panoramic camera, and the system includes: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable;
the method comprises the following steps:
placing a motor provided with the turntable in a test environment in which the ambient illumination is stable;
Placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
starting the motor, and driving the turntable to rotate through the motor;
when the turntable rotates according to the preset rotating speed of the motor, controlling a lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, so as to determine the exposure time of the lens of the exposure time to be tested according to the fan-shaped trailing angle of the pointer shot in the image data;
and determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value of any two exposure times is within a first preset range in the obtained exposure time of all the lenses for measuring the exposure time.
Optionally, the motor is a motor with a rotation number display; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
The lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
Optionally, the method further comprises: when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
Optionally, the method further comprises:
and determining that the exposure time of the lenses for measuring the exposure time is synchronous if the difference value of every two exposure times is within the first preset range in the exposure time of the lenses for measuring the exposure time.
Optionally, the panoramic camera includes two or more optical lenses.
Optionally, the panoramic camera includes four fisheye optical lenses, four fisheye optical lenses one-to-one are distributed on four panels of the panoramic camera, the four fisheye optical lenses are located on the same horizontal plane, and each panel is provided with a physical shooting button or a touch screen shooting control for controlling the corresponding distributed fisheye optical lenses to shoot.
On the other hand, the embodiment of the invention also provides a method for testing the multi-lens exposure time synchronization of the panoramic camera, which is applied to a system for testing the multi-lens exposure time of the panoramic camera, and comprises the following steps: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable;
the method comprises the following steps:
placing a motor provided with the turntable in a test environment in which the ambient illumination is stable;
placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
starting the motor, and driving the turntable to rotate through the motor;
when the turntable rotates according to the preset rotating speed of the motor, controlling a lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, so as to determine the exposure time of the lens of the exposure time to be tested according to the fan-shaped trailing angle of the pointer shot in the image data;
Determining the average exposure time of the exposure time of all the obtained lenses with the exposure time to be tested;
and determining that the exposure time of any lens with the exposure time to be detected is synchronous if the difference value between the exposure time of any lens with the exposure time to be detected and the average exposure time is within a second preset range.
Optionally, the motor is a motor with a rotation number display; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
the lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
Optionally, the method further comprises: when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
Optionally, the method further comprises:
and determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value between each exposure time and the average exposure time is within the second preset range in the obtained exposure time of the lens for measuring the exposure time.
Optionally, the panoramic camera includes two or more optical lenses.
Optionally, the panoramic camera includes four fisheye optical lenses, four fisheye optical lenses one-to-one are distributed on four panels of the panoramic camera, the four fisheye optical lenses are located on the same horizontal plane, and each panel is provided with a physical shooting button or a touch screen shooting control for controlling the corresponding distributed fisheye optical lenses to shoot.
In still another aspect, an embodiment of the present invention further provides a method for testing multi-lens exposure time synchronization of a panoramic camera, where the method is applied to a system for testing multi-lens exposure time of a panoramic camera, and the system includes: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable;
The method comprises the following steps:
placing a motor provided with the turntable in a test environment in which the ambient illumination is stable;
placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
starting the motor, and driving the turntable to rotate through the motor;
when the turntable rotates according to the preset rotating speed of the motor, controlling a lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, so as to determine the exposure time of the lens of the exposure time to be tested according to the fan-shaped trailing angle of the pointer shot in the image data;
determining the average exposure time of the exposure time of all the obtained lenses with the exposure time to be tested;
and determining a maximum value in all differences between each exposure time and the average exposure time in a plurality of or all exposure times in the obtained exposure times of all lenses to be tested, and determining that the maximum value is in a target range, wherein the plurality of or all exposure times in the exposure times of all lenses to be tested are synchronous.
Optionally, the motor is a motor with a rotation number display; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
the lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
Optionally, the method further comprises: when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
Optionally, the panoramic camera includes two or more optical lenses.
Optionally, the panoramic camera includes four fisheye optical lenses, four fisheye optical lenses one-to-one are distributed on four panels of the panoramic camera, the four fisheye optical lenses are located on the same horizontal plane, and each panel is provided with a physical shooting button or a touch screen shooting control for controlling the corresponding distributed fisheye optical lenses to shoot.
From the above technical solutions, the embodiment of the present invention has the following advantages:
the embodiment of the invention provides a method for testing the multi-lens exposure time synchronization of a panoramic camera, which is applied to a system for testing the multi-lens exposure time of the panoramic camera, and comprises the following steps: the method is applied to a system for testing the exposure time of multiple lenses of a panoramic camera, and the system comprises: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable; the method comprises the following steps: placing a motor provided with the turntable in a test environment in which the ambient illumination is stable; placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors; starting the motor, and driving the turntable to rotate through the motor; when the turntable rotates according to the preset rotating speed of the motor, controlling a lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, so as to determine the exposure time of the lens of the exposure time to be tested according to the fan-shaped trailing angle of the pointer shot in the image data; and determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value of any two exposure times is within a first preset range in the obtained exposure time of all the lenses for measuring the exposure time. The test method provides a brand-new exposure time synchronous detection scheme of the multi-lens module in the panoramic camera field. In addition, the synchronous detection scheme of the exposure time has the advantages of simple layout, high flexibility, simple system, small system building difficulty, easy and convenient maintenance and easy replacement of parts to be maintained. In addition, in the present embodiment, the accuracy of the exposure time detection technique is high, and thus the accuracy of the exposure time synchronization detection result is high.
Drawings
FIG. 1 is a system configuration diagram for testing multi-lens exposure time synchronization of a panoramic camera according to an embodiment of the present invention;
FIG. 2 is a diagram of a test apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a turntable and an angle scale according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the accuracy of an angle scale according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for testing multi-lens exposure time synchronization of a panoramic camera according to an embodiment of the present invention;
FIG. 6 is a schematic view of sector angles of an exposure time pointer sweep according to an embodiment of the present invention;
FIG. 7 is a flowchart of a method for testing multi-lens exposure time synchronization of a panoramic camera according to another embodiment of the present invention;
fig. 8 is a flowchart of a method for testing multi-lens exposure time synchronization of a panoramic camera according to another embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a multi-lens exposure time synchronization method for testing a panoramic camera, which is used for improving the precision and the flexibility of the exposure time synchronization detection technology.
The embodiment of the invention provides a method for testing the multi-lens exposure time synchronization of a panoramic camera, which is applied to a system for testing the multi-lens exposure time synchronization of the panoramic camera, as shown in fig. 1, and comprises the following steps: a testing device 1, a panoramic camera 2 and a plurality of test mirrors 3, the number of which is the same as the number of lenses of at least two exposure times to be tested of said panoramic camera 2. In the embodiment of the present invention, taking a lens for testing 4 exposure times to be tested as an example, therefore, as shown in fig. 1, the test panorama camera multi-lens exposure time synchronization system includes 4 test mirrors 3, each of the test mirrors 3 is used for imaging a turntable 11 facing the test mirror 3. In the present embodiment, the turntable 11 is part of the testing device 1. As shown in fig. 1, 4 test mirrors image the turntable 11 towards the test mirror 3, respectively, a first image 31, a second image 32, a third image 33 and a fourth image 34. And as shown in fig. 1, all the lenses of the panoramic camera 2 for exposure time to be tested are oppositely arranged in a one-to-one correspondence with the plurality of test mirrors 3. As shown in fig. 1 and 2, the testing device 1 includes the turntable 11 with a motor 10, a pointer 12 is fixed at the center of the turntable 11, an angle scale 13 of 360 degrees is disposed on the periphery of one surface of the turntable 11 where the pointer 12 is fixed, and the center of the angle scale 13 of 360 degrees is concentric with the center of the turntable 11.
In the embodiment of the invention, the turntable 11, the angle scale 13 and the constant speed motor 10 are installed together and placed on the side of the panoramic camera 2. A plane mirror, i.e. a test mirror 3, is vertically placed in front of each lens module of the panoramic camera 2, and the test mirror 3 is slightly stabilized. The angle of the plane mirror in front of each lens module and the angle and the azimuth of the constant-speed motor are adjusted so that each lens of the panoramic camera 2 can completely and clearly shoot the turntable 11, the pointer 12 and the angle scale 13 through the plane mirror. The orientations of the plane mirror, the motor 10 and the panoramic camera 2 are fixed.
In the embodiment of the present invention, the system for testing the exposure time of multiple lenses of the panoramic camera further includes a control unit 5, where the control unit 5 communicates with the panoramic camera 2, specifically, the control unit 5 communicates with lens modules of the panoramic camera 2 to be tested for exposure time, and each lens module correspondingly controls at least one lens. In the embodiment of the present invention, an independent corresponding lens of each lens module is taken as an example for explanation.
When the turntable 11 rotates according to a predetermined rotation speed of the motor 10, the control unit 5 controls the lens of the exposure time to be measured in the panoramic camera 2 to capture image data including the pointer 12, the turntable 11, and the angle scale 13, which includes the image in the test mirror 3 corresponding to the lens of the exposure time to be measured. During the exposure of the panoramic camera 2, the moving track of the rotating pointer 12 forms a fan-shaped shadow, also called a fan-shaped smear, in the captured image.
In the embodiment of the present invention, after receiving an operation instruction of a user, the control unit 5 sends a control instruction to the lens module of the exposure time to be tested in the panoramic camera 2, and the lens module controls the corresponding lens of the exposure time to be tested to shoot the image data imaged in the test mirror 3 corresponding to the lens of the exposure time to be tested. Each lens module is internally arranged in the panoramic camera, and the lens of the lens module is externally arranged in the panoramic camera and is used for shooting image data.
As shown in fig. 3, the turntable 11 provided in this embodiment is circular, and the pointer 12 is a radius of the turntable 11. The pointer 12 is used to form a fan-shaped shadow along with the rotation of the turntable 11 during the exposure process of the panoramic camera 2. To increase the color depth of the fan-shaped shadow, the circular turntable is colored with a white background, while the width of the pointer 12 is greater than 1/20 the pointer length, and the pointer is dark, preferably black. To improve the accuracy of the fan-shaped shadow angle measurement, isosceles triangles are required to be used at both ends of the circle center and the circular edge to which the pointer 12 points. The vertex angle of an isosceles triangle near one end of the circle center falls on the circle center, and the bottom edge pointer 12 points to the direction of the round edge; the vertex angle of an isosceles triangle close to the round edge falls on the round edge, and the bottom edge pointer 12 points to the circle center direction. Preferably, the length of the base of the two isosceles triangles is greater than 3 times the width of pointer 12. Preferably, an isosceles triangle is used as the isosceles triangle. The turntable 11 is mounted on the constant speed motor 10. The center of the turntable is arranged opposite to the center of the rotating shaft of the motor 10.
Optionally, a turntable 11 is detachably connected to the motor 10.
Optionally, an angle scale 13 is detachably connected to the turntable 11.
Preferably, the angle scale 13 is a disc slightly larger than the turntable 11, scale marks are evenly distributed outwards in the outer edge of the turntable 11, and the scales are clear enough, so that after the panoramic camera shoots, the arrow of the pointer 12 of the turntable 11, namely the scale mark values pointed at both sides of the sector smear, can be clearly distinguished from the shot image.
Optionally, the testing device 1 includes a turntable sleeve, the outer periphery of the turntable sleeve is provided with the 360-degree angle scale 13, and the turntable 11 is sleeved with the turntable sleeve, so that the outer periphery of one surface of the turntable 11, on which the pointer 12 is fixed, is fixedly provided with the 360-degree angle scale 13.
In the testing device, the scales of the 360-degree angle scale 13 are exposed around the outer edge of the rotary table 11, and the circle center of the scale orientation is concentric with the circle center of the rotary table 11. The angle scale 13 is fixed and cannot be rotated or moved during the test. Preferably, the angle scale 13 is a disc slightly larger than the turntable 11. As shown in fig. 4, the scales of the angle scale 13 are uniformly dispersed outwards in the outer edge of the turntable 11, and the scales are clear enough so that after the panoramic camera 2 shoots, the arrow of the turntable pointer 12, that is, the scale values of the angle scale 13 pointed at the two sides of the sector smear can be clearly distinguished in the shot image.
In this embodiment of the present invention, the control unit 5 may be external to the panoramic camera 2, and connected to the panoramic camera 2 through a wired interface such as remote communication or wired communication, so as to send a control instruction to the panoramic camera 2 after receiving an operation instruction of a user, so as to start a processor in the panoramic camera 2 to trigger a shooting function of a lens module for exposure time to be measured, where the lens module controls a corresponding lens for exposure time to be measured to shoot image data imaged in the test mirror 3 corresponding to the lens for exposure time to be measured. In other embodiments, the control unit 5 may be built in the panoramic camera 2, and after receiving an operation instruction of a user, send a control instruction to a lens module of the exposure time to be tested in the panoramic camera 2, where the lens module controls a lens of the exposure time to be tested to shoot image data imaged in the test mirror 3 corresponding to the lens of the exposure time to be tested.
As shown in fig. 5, an embodiment of the present invention provides a process for testing the synchronization of exposure time of multiple shots of a panoramic camera, where the process may use the system for testing the synchronization of exposure time of multiple shots of a panoramic camera shown in fig. 1, and the system is used for testing the synchronization of exposure time of multiple shots of a panoramic camera, and specifically includes the following steps:
501. And placing the motor provided with the turntable in a test environment in which the ambient illumination is stable.
502. The panoramic camera and the plurality of mirrors are positioned toward a face of the turntable with the pointer. Each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the mirrors.
503. And starting the motor, and driving the turntable to rotate through the motor.
504. When the turntable rotates according to the preset rotating speed of the motor, the lens of the exposure time to be detected in the panoramic camera is controlled to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be detected, and the exposure time of the lens of the exposure time to be detected is determined according to the fan-shaped trailing angle of the pointer shot in the image data.
505. And determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value of any two exposure times is within a first preset range in the obtained exposure time of all the lenses for measuring the exposure time.
In the embodiment of the present invention, after obtaining the fan-shaped smear angle of the pointer 12 captured in the image data, the user determines the exposure time of the lens with the exposure time to be tested according to the fan-shaped smear angle of the pointer 12 captured in the image data, determines the exposure time of the lens with all the exposure times to be tested, and determines that the exposure time of the lens with any two exposure times is synchronous if the difference value between any two exposure times is within a first preset range. The user can determine the exposure time of the lens of the exposure time to be measured through manual calculation. The smaller the value of the first preset range is, if the difference value of any two exposure times among the obtained exposure times of the lenses with all exposure times to be detected is determined to be in the first preset range, the better the synchronization effect of the exposure times of the obtained lenses with the exposure times to be detected is determined. In other embodiments, the user may also calculate the exposure time of the lens for obtaining the exposure time to be measured through simulation software or calculation software, determine the exposure time of any two lenses for obtaining the exposure time to be measured, and determine that the exposure time of any two lenses for measuring the exposure time is synchronous if the difference value of any two exposure times is within a first preset range.
As shown in fig. 6, the exposure time t for a single test is calculated from the angular size θ of the fan-shaped smear and the angular velocity ω of the turntable. The calculation formula is as follows,
t＝θ/ω
wherein when the sector smear does not cross the 0 degree scale,
and->Respectively two scales corresponding to the arrows on two sides of the sector in the sector smear, < + >>And->Directly reading the +.>For a larger value, +.>Is a smaller value.
When the fan-shaped smear crosses the 0 degree scale,
and->Respectively two scales corresponding to the arrows on two sides of the sector in the sector smear, < + >>And->Directly reading the +.>For a larger value, +.>Is a smaller value.
ω＝360°·n
In the embodiment of the invention, n is the rotating speed of the turntable, is set when the rotating speed of the motor is regulated, and can be directly read in a setting interface of the rotating speed of the motor.
In the embodiment of the invention, the exposure time t of a single test is calculated from the test record data according to the following formula.
The single shooting is easily influenced by the interference factors of the environment and the operation, and the average value of the multiple test exposure time can be calculated through repeated test exposure time for multiple times, so that the influence of the interference factors of the environment and the operation on the test result is reduced.
Optionally, the exposure time synchronization of the lenses for measuring all the exposure times to be measured may be determined by determining that the difference between every two exposure times is within the first preset range among the obtained exposure times of the lenses for all the exposure times to be measured.
Optionally, the motor is a motor with a rotation number display; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
the lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
Optionally, in step 504, when determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer photographed in the image data, the method further includes:
when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
Optionally, after the step 504, the method further includes:
And determining that the exposure time of the lenses for measuring the exposure time is synchronous if the difference value of every two exposure times is within the first preset range in the exposure time of the lenses for measuring the exposure time.
Optionally, the panoramic camera includes two or more optical lenses.
Optionally, the panoramic camera includes four fisheye optical lenses, four fisheye optical lenses one-to-one are distributed on four panels of the panoramic camera, the four fisheye optical lenses are located on the same horizontal plane, and each panel is provided with a physical shooting button or a touch screen shooting control for controlling the corresponding distributed fisheye optical lenses to shoot.
As shown in fig. 7, another embodiment of the present invention provides a process for testing the synchronization of exposure time of multiple shots of a panoramic camera, where the process may use the system for testing the synchronization of exposure time of multiple shots of a panoramic camera shown in fig. 1, and the system is used for testing the synchronization of exposure time of multiple shots of a panoramic camera, and specifically includes the following steps:
701. and placing the motor provided with the turntable in a test environment in which the ambient illumination is stable.
702. The panoramic camera and the plurality of mirrors are positioned toward a face of the turntable with the pointer. Each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the mirrors.
703. And starting the motor, and driving the turntable to rotate through the motor.
704. When the turntable rotates according to the preset rotating speed of the motor, the lens of the exposure time to be detected in the panoramic camera is controlled to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be detected, and the exposure time of the lens of the exposure time to be detected is determined according to the fan-shaped trailing angle of the pointer shot in the image data.
705. The average exposure time of the exposure times of the lens of all the obtained exposure times to be measured is determined.
706. And determining that the exposure time of any lens with the exposure time to be detected is synchronous if the difference value between the exposure time of any lens with the exposure time to be detected and the average exposure time is within a second preset range.
In the embodiment of the present invention, after obtaining the fan-shaped smear angle of the pointer 12 captured in the image data, the user determines the exposure time of the lenses with the exposure time to be tested according to the fan-shaped smear angle of the pointer 12 captured in the image data, determines the average exposure time of the exposure times of all the obtained lenses with the exposure time to be tested, determines that the difference between the exposure time of any (or a plurality of or all) lenses with the exposure time to be tested and the average exposure time is within a second preset range, and determines that the exposure time of any (or a plurality of or all) lenses with the exposure time is synchronous. The user can determine the exposure time of the lens of the exposure time to be measured through manual calculation. The smaller the value of the second preset range, if it is determined that any (one or more or all) of the obtained exposure times of the lenses of all the exposure times to be tested are within the second preset range, the better the synchronization effect of the exposure times of the lenses of the obtained exposure times to be tested is determined. In other embodiments, the user may also calculate, by using simulation software or calculation software, the exposure times of the lenses for obtaining the exposure times to be tested, determine the exposure times of all the obtained lenses for obtaining the exposure times to be tested, and determine that the difference between any (or one or more or all) of the exposure times and the average exposure time is within a second preset range, and then determine that the exposure times of the lenses for measuring the exposure times of any one of the lenses for obtaining the exposure times are synchronous.
As shown in fig. 6, the exposure time t for a single test is calculated from the angular size θ of the fan-shaped smear and the angular velocity ω of the turntable. The calculation formula is as follows,
t＝θ/ω
wherein when the sector smear does not cross the O degree scale,
and->Respectively two scales corresponding to the arrows on two sides of the sector in the sector smear, < + >>And->Beat inDirectly reading +.>For a larger value, +.>Is a smaller value.
When the fan-shaped smear crosses the 0 degree scale,
and->Respectively two scales corresponding to the arrows on two sides of the sector in the sector smear, < + >>And->Directly reading the +.>For a larger value, +.>Is a smaller value.
ω＝360°·n
In the embodiment of the invention, n is the rotating speed of the turntable, is set when the rotating speed of the motor is regulated, and can be directly read in a setting interface of the rotating speed of the motor.
In the embodiment of the present invention, the exposure time f of a single test is calculated from the test record data according to the following formula.
The single shooting is easily influenced by the interference factors of the environment and the operation, and the average value of the multiple test exposure time can be calculated through repeated test exposure time for multiple times, so that the influence of the interference factors of the environment and the operation on the test result is reduced.
Optionally, the motor is a motor with a rotation number display; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
The lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
In this scheme, owing to adopt the carousel of taking angle scale and pointer to adopt the motor that has the number of turns display function, use the mode of mirror formation of image simultaneously, realized the uniformity of every camera lens module test environment, will come from the difference that the shooting shot the object will be minimum.
When the scheme is adopted for testing, the angle of the plane mirror in front of each lens module and the angle and the azimuth of the constant-speed motor are adjusted, so that each lens of the panoramic camera 2 can completely and clearly shoot the turntable 11, the pointer 12 and the angle scale 13 through the plane mirror. The plane mirror, the motor 10, and the number of rotations of the motor 10 and the orientation of the panoramic camera 2 are fixed. And then, the rotating speed of the motor 10 is regulated, so that the sector smear angle of the pointer 12 of the turntable 11 in the images shot by all the lens modules of the panoramic camera 2 is smaller than 360 degrees. To improve the accuracy of the test results, the angle of the fan-shaped smear is preferably greater than 180 degrees and less than 360 degrees.
Optionally, in step 704, when determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer photographed in the image data, the method further includes:
when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
After the rotation speed of the motor 10 is adjusted, the panoramic camera 2 is used for shooting an image, or a small video is recorded, and in the video recorded by each lens, one frame of image is taken out at the same position, for example, the 200 th frame is taken. Then, the value of the rotation circle of the motor 10, the starting position and the ending position of the sector smear of the pointer 12 of the turntable 11, which are shot by each lens module, are recorded, and the exposure time length difference of the frames of the module to be tested of the panoramic camera 2 can be calculated.
In the image shot by one lens module, the scale values of the initial position and the end position of the sector-shaped smear of the pointer 12 are respectivelyAnd->The corresponding motor displays the number of turns N 1 And N 2 (since the fan angle is less than 360 degrees, N 1 And N 2 Equal or differing by only 1), the rotational speed of the turntable has a value n.
Calculated from the above data, adding the number of motor turns, i.e. the number of turns rotated by the turntable, the indicated scales of the start position and end position of the pointer sector smearAnd->The angle ψ actually rotated by the corresponding turntable from the beginning to the photographed moment 1 And psi is 2 The method comprises the following steps of:
the angle θ of the fan-shaped smear is:
θ＝Ψ 2 -Ψ 1
the angular velocity ω of the turntable is:
ω＝360°.n
exposure time t e The method comprises the following steps:
using the test record data to calculate the exposure time t of the module e The method comprises the following steps:
the exposure time of the K lenses of the panoramic camera is recorded as t respectively e1 、t e2 、t e3 、......、t eK The number of turns and the initial angle of the corresponding shot turnplate are respectively And->The exposure time calculation formula of each lens module is as follows:
/>
……
average exposure timeThe calculation formula of (2) is as follows:
in the embodiment of the present invention, after determining the obtained average exposure time of the exposure times of all the lenses to be tested in the above manner, the user may determine that the difference between the exposure time of any (one or more or all) lenses to be tested in the exposure time and the average exposure time is within the second preset range, and then determine that the exposure time of any (or more or all) lenses to be tested in the exposure time is synchronous. The user can determine the exposure time of the lens of the exposure time to be measured through manual calculation. The smaller the value of the second preset range, if it is determined that any (one or more or all) of the obtained exposure times of the lenses of all the exposure times to be tested are within the second preset range, the better the synchronization effect of the exposure times of the lenses of the obtained exposure times to be tested is determined. In other embodiments, the user may also calculate, by using simulation software or calculation software, the exposure times of the lenses for obtaining the exposure times to be tested, determine the exposure times of all the obtained lenses for obtaining the exposure times to be tested, and determine that the difference between any (or one or more or all) of the exposure times and the average exposure time is within a second preset range, and then determine that the exposure times of the lenses for measuring the exposure times of any one of the lenses for obtaining the exposure times are synchronous.
For example, in the present embodiment, exposure times t for K lenses of the panoramic camera may be set e1 、t e2 、t e3 、......、t eK Any of the exposure times and the average exposure timeComparing the difference between said arbitrary number of said exposure times and the average exposure time with a second preset range>And if the difference value of the two images is within the second preset range, determining that the exposure time of the lens for measuring any one of the exposure times is synchronous.
In other embodiments, the exposure time t of K lenses of the panoramic camera may be e1 、t e2 、t e3 、......、t eK Each of the plurality of exposure times is equal to an average exposure timeRespectively, with a second preset range if each of said plurality of exposure times is compared with an average exposure time +.>And if the difference value of the exposure time is within the second preset range, determining that the exposure time of the lenses for measuring the exposure times is synchronous.
Optionally, after step 704, the method further includes:
and determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value between each exposure time and the average exposure time is within the second preset range in the obtained exposure time of the lens for measuring the exposure time.
In this embodiment, the exposure time t of K lenses of the panoramic camera can be set e1 、t e2 、t e3 、......、t ek Each of the all exposure times and the average exposure timeRespectively, with a second preset range if each of all exposure times is equal to the average exposure time +.>If the difference value of the two is within the second preset range, determining that the exposure time of the lenses for measuring all exposure times is synchronous.
Optionally, the panoramic camera includes two or more optical lenses.
Optionally, the panoramic camera includes four fisheye optical lenses, four fisheye optical lenses one-to-one are distributed on four panels of the panoramic camera, the four fisheye optical lenses are located on the same horizontal plane, and each panel is provided with a physical shooting button or a touch screen shooting control for controlling the corresponding distributed fisheye optical lenses to shoot.
As shown in fig. 8, another embodiment of the present invention provides a process for testing the synchronization of exposure time of multiple shots of a panoramic camera, where the process may use the system for testing the synchronization of exposure time of multiple shots of a panoramic camera shown in fig. 1, and the system is used for testing the synchronization of exposure time of multiple shots of a panoramic camera, and specifically includes the following steps:
801. And placing the motor provided with the turntable in a test environment in which the ambient illumination is stable.
802. The panoramic camera and the plurality of mirrors are positioned toward a face of the turntable with the pointer. Each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the mirrors.
803. And starting the motor, and driving the turntable to rotate through the motor.
804. When the turntable rotates according to the preset rotating speed of the motor, the lens of the exposure time to be detected in the panoramic camera is controlled to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be detected, and the exposure time of the lens of the exposure time to be detected is determined according to the fan-shaped trailing angle of the pointer shot in the image data.
805. The average exposure time of the exposure times of the lens of all the obtained exposure times to be measured is determined.
806. And determining a maximum value in all differences between each exposure time and the average exposure time in a plurality of or all exposure times in the obtained exposure times of all lenses to be tested, and determining that the maximum value is in a target range, wherein the plurality of or all exposure times in the exposure times of all lenses to be tested are synchronous.
The flow of the method for synchronizing exposure times of a test panoramic camera according to the present embodiment is different from the embodiment shown in fig. 7 in that, after determining the average exposure time of the exposure times of the lenses of all the obtained exposure times to be tested in step 705 in the embodiment shown in fig. 7, step 806 is performed, that is, determining the maximum value of all the differences between each of the exposure times and the average exposure time among the multiple or all exposure times of the lenses of all the obtained exposure times to be tested, and determining that the maximum value is within the target range, then determining that the multiple or all the exposure times of the lenses of all the exposure times to be tested are synchronized. Therefore, for the system for testing the synchronization of the exposure time of the panoramic camera and the same steps as those shown in fig. 7, the description is omitted in this embodiment.
In this embodiment, for example, the exposure time of each lens module is offsetA difference (i.e. the difference between each of said exposure times and said average exposure time) Δt e1 、Δt e2 、Δt e3 、......、Δt eK The method comprises the following steps of:
……
in this embodiment, the exposure time t of K lenses of the panoramic camera can be used e1 、t e2 、t e3 、......、t eK In (2) or all exposure times, a maximum value deltat of all differences of each of the exposure times from the average exposure time emax And determining that the maximum value is in the target range, and determining that the plurality of exposure times or all exposure times of the lens with all exposure times to be detected are synchronous. The target range may be the second preset range. In this scheme, exposure time deviation Δt is used e1 、Δt e2 、Δt e3 、......、Δt eK The value deltat with the largest deviation value emax To evaluate the timing of exposure. When Deltat emax The smaller the exposure time synchronization is, the better the exposure time synchronization is made; conversely, when Δt emax The larger the exposure time synchronization, the worse it is made.
In all the above schemes, the problem that the exposure time of the panoramic camera multi-lens module cannot be tested synchronously is solved by imaging the turntable 11 by shooting the plane mirror.
From the above technical solutions, the embodiment of the present invention has the following advantages:
the method is applied to a system for testing the exposure time of multiple lenses of a panoramic camera, and the system comprises: the method is applied to a system for testing the exposure time of multiple lenses of a panoramic camera, and the system comprises: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable; the method comprises the following steps: placing a motor provided with the turntable in a test environment in which the ambient illumination is stable; placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors; starting the motor, and driving the turntable to rotate through the motor; when the turntable rotates according to the preset rotating speed of the motor, controlling a lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, so as to determine the exposure time of the lens of the exposure time to be tested according to the fan-shaped trailing angle of the pointer shot in the image data; and determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value of any two exposure times is within a first preset range in the obtained exposure time of all the lenses for measuring the exposure time. The test method provides a brand-new exposure time synchronous detection scheme of the multi-lens module in the panoramic camera field. In addition, the synchronous detection scheme of the exposure time has the advantages of simple layout, high flexibility, simple system, small system building difficulty, easy and convenient maintenance and easy replacement of parts to be maintained. In addition, in the present embodiment, the accuracy of the exposure time detection technique is high, and thus the accuracy of the exposure time synchronization detection result is high.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for testing the synchronization of exposure time of multiple lenses of a panoramic camera, which is characterized in that the method is applied to a system for testing the exposure time of multiple lenses of the panoramic camera, and the system comprises: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable;
the method comprises the following steps:
placing a motor provided with the turntable in a test environment in which the ambient illumination is stable;
Placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
starting the motor, and driving the turntable to rotate through the motor;
when the turntable rotates according to the preset rotating speed of the motor, controlling the lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data, wherein the determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data comprises: dividing the sector smear angle of the pointer shot in the image data by the angular speed of the turntable to obtain a division operation result, and determining the division operation result as the exposure time of the lens with the exposure time to be detected for a single time;
And determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value of any two exposure times is within a first preset range in the obtained exposure time of all the lenses for measuring the exposure time.
2. The method of claim 1, wherein the motor is a motor having a display of the number of rotations; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
the lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
3. The method of claim 1, wherein the method further comprises:
when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
4. A method according to any one of claims 1-3, wherein the method further comprises:
and determining that the exposure time of the lenses for measuring the exposure time is synchronous if the difference value of every two exposure times is within the first preset range in the exposure time of the lenses for measuring the exposure time.
5. A method as claimed in any one of claims 1 to 3, wherein the panoramic camera comprises two or more optical lenses.
6. A method for testing the synchronization of exposure time of multiple lenses of a panoramic camera, which is characterized in that the method is applied to a system for testing the exposure time of multiple lenses of the panoramic camera, and the system comprises: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable;
the method comprises the following steps:
placing a motor provided with the turntable in a test environment in which the ambient illumination is stable;
Placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
starting the motor, and driving the turntable to rotate through the motor;
when the turntable rotates according to the preset rotating speed of the motor, controlling the lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data, wherein the determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data comprises: dividing the sector smear angle of the pointer shot in the image data by the angular speed of the turntable to obtain a division operation result, and determining the division operation result as the exposure time of the lens with the exposure time to be detected for a single time;
Determining the average exposure time of the exposure time of all the obtained lenses with the exposure time to be tested;
and determining that the exposure time of any lens with the exposure time to be detected is synchronous if the difference value between the exposure time of any lens with the exposure time to be detected and the average exposure time is within a second preset range.
7. The method of claim 6, wherein the motor is a motor having a display of the number of rotations; controlling a lens of the exposure time to be measured in the panoramic camera to shoot image data including the pointer, the turntable and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured, comprising:
the lens shooting of the exposure time to be detected in the panoramic camera is controlled to comprise image data imaged in the mirror corresponding to the lens of the exposure time to be detected, and the image data comprises the pointer, the rotary disc, the angle scale and the rotation circle number of the motor.
8. The method of claim 6, wherein the method further comprises:
when the image data are video data, selecting sector smear angles of the pointers shot in frame pictures of the same frame position in the video data shot by each shot of the exposure time to be detected, and determining the exposure time of the shot of the exposure time to be detected.
9. The method of any one of claims 6-8, wherein the method further comprises:
and determining that the exposure time of the lens for measuring the exposure time is synchronous if the difference value between each exposure time and the average exposure time is within the second preset range in the obtained exposure time of the lens for measuring the exposure time.
10. A method for testing the synchronization of exposure time of multiple lenses of a panoramic camera, which is characterized in that the method is applied to a system for testing the exposure time of multiple lenses of the panoramic camera, and the system comprises: the device comprises a testing device, a panoramic camera and a plurality of testing mirrors, wherein the number of the testing mirrors is the same as that of at least two lenses of the panoramic camera, the lenses are used for exposure time to be tested, the testing device comprises a turntable with a motor, a pointer is fixed at the center of the turntable, an angle scale of 360 degrees is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the angle scale of 360 degrees is concentric with the center of the turntable;
the method comprises the following steps:
placing a motor provided with the turntable in a test environment in which the ambient illumination is stable;
placing the panoramic camera and the plurality of mirrors toward a face of the turntable with the pointer; each mirror is used for imaging the turntable facing the mirror, and all lenses of the panoramic camera, which are used for exposing time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
Starting the motor, and driving the turntable to rotate through the motor;
when the turntable rotates according to the preset rotating speed of the motor, controlling the lens of the exposure time to be tested in the panoramic camera to shoot image data which comprises the pointer, the turntable and the angle scale and is imaged in the mirror corresponding to the lens of the exposure time to be tested, determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data, wherein the determining the exposure time of the lens of the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data comprises: dividing the sector smear angle of the pointer shot in the image data by the angular speed of the turntable to obtain a division operation result, and determining the division operation result as the exposure time of the lens with the exposure time to be detected for a single time;
determining the average exposure time of the exposure time of all the obtained lenses with the exposure time to be tested;
and determining a maximum value in all differences between each exposure time and the average exposure time in a plurality of or all exposure times in the obtained exposure times of all lenses to be tested, and determining that the maximum value is in a target range, wherein the plurality of or all exposure times in the exposure times of all lenses to be tested are synchronous.
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CN114636546B (en) * 2022-03-10 2024-05-14 杭州海康威视数字技术股份有限公司 System for imaging synchronicity detection

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