CN110505474B - Multi-lens exposure time synchronization system for panoramic camera testing - Google Patents
Multi-lens exposure time synchronization system for panoramic camera testing Download PDFInfo
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- CN110505474B CN110505474B CN201910806975.6A CN201910806975A CN110505474B CN 110505474 B CN110505474 B CN 110505474B CN 201910806975 A CN201910806975 A CN 201910806975A CN 110505474 B CN110505474 B CN 110505474B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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Abstract
The embodiment of the invention provides a multi-lens exposure time synchronization system for testing 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 quantity of lenses of the testing device, the panoramic camera and at least two lenses of the testing device are the same in exposure time to be tested, and the testing device comprises a turntable with a motor. A control unit for controlling the photographed image data to include a pointer, a dial and an angle scale when the dial rotates according to a predetermined rotation speed of the motor; and determining the exposure time of the lens with the exposure time to be measured according to the fan-shaped smear angle of the pointer shot in the image data, and determining the exposure time of the lens with the exposure time to be measured in any two obtained exposure times within a preset range, wherein the exposure time of the lens with the exposure time to be measured is synchronous. The system provides a brand-new exposure time synchronous detection scheme of the multi-lens module in the panoramic camera field, and has the advantages of simple layout, high flexibility, small system building difficulty and easy maintenance.
Description
Technical Field
The invention relates to the field of shooting, in particular to a multi-lens exposure time synchronization system for 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. Moreover, no detection scheme for panoramic multi-lens exposure time synchronization is currently retrieved.
Therefore, in the field of panoramic camera production, it is needed to provide a scheme for testing the multi-lens exposure time synchronization of a panoramic camera, and further, to provide a scheme capable of 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 system for testing panoramic cameras, which is used for improving the precision and flexibility of the exposure time synchronization detection technology.
In one aspect, an embodiment of the present invention provides a system for testing exposure time synchronization of multiple shots of a panoramic camera, including: 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 imaging the turntable facing the mirrors, and the lenses of all the lenses of the panoramic camera, the lenses of which are to be tested, are oppositely arranged in a one-to-one correspondence manner; 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;
a control unit that controls a lens of the exposure time to be measured in the panoramic camera to capture image data including the pointer, the dial, and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured when the dial is rotated according to a predetermined rotational speed of the motor; and determining the exposure time of the lens with the exposure time to be measured according to the fan-shaped smear angle of the pointer shot in the image data, and determining that the exposure time of the lens with the exposure time to be measured is synchronous if the difference value of any two exposure times is within a preset range in the obtained exposure time of all the lenses with the exposure time to be measured.
Optionally, the device further includes a determining unit, where the determining unit is configured to determine exposure times of the lenses with exposure times to be measured according to fan-shaped smear angles of the pointers captured in the image data, determine exposure times of all obtained lenses with exposure times to be measured, and determine that exposure times of the lenses with exposure times to be measured are synchronous if a difference value between any two exposure times is within a preset range.
Optionally, the control unit is built in the panoramic camera, after receiving an operation instruction of a user, the control unit sends a control instruction to a lens module of exposure time to be tested in the panoramic camera, and the lens module controls a corresponding lens of exposure time to be tested to shoot image data imaged in the test mirror corresponding to the lens of exposure time to be tested.
Optionally, the control unit is externally arranged on the panoramic camera, is in remote communication with the panoramic camera or is connected through a communication interface, and after receiving an operation instruction of a user, the control unit sends a control instruction to a lens module of exposure time to be tested in the panoramic camera, and the lens module controls a corresponding lens of exposure time to be tested to shoot image data imaged in the test mirror corresponding to the lens of exposure time to be tested.
Optionally, the motor is a motor with a rotation number display; the image data includes the pointer, the dial and the angle scale, and the number of rotations of the motor.
Optionally, the determining unit is further configured to select, when the image data is video data, a sector smear angle of the pointer, which is shot in a frame picture of a same frame position in the video data shot by each lens of the exposure time to be detected, and determine the exposure time of the lens of the exposure time to be detected.
Optionally, the determining unit is further configured to determine that, in the obtained exposure times of the lenses of all exposure times to be tested, the exposure times of the lenses of all exposure times to be tested are synchronous if the difference between every two exposure times is within the preset range.
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.
Optionally, the determining unit is inside the panoramic camera; or the determining unit is arranged outside the panoramic camera and is in remote communication with the panoramic camera or connected through a communication interface; or, the determining unit is built in the control unit or replaced by the control unit to realize the function of the determining unit.
From the above technical solutions, the embodiment of the present invention has the following advantages:
the embodiment of the invention provides a multi-lens exposure time synchronization system for testing 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 lenses are used for imaging the turntable facing the mirrors, and the lenses of all the lenses of the panoramic camera, the lenses of which are to be tested, are oppositely arranged in a one-to-one correspondence manner; 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; a control unit that controls a lens of the exposure time to be measured in the panoramic camera to capture image data including the pointer, the dial, and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured when the dial is rotated according to a predetermined rotational speed of the motor; and determining the exposure time of the lens with the exposure time to be measured according to the fan-shaped smear angle of the pointer shot in the image data, and determining that the exposure time of the lens with the exposure time to be measured is synchronous if the difference value of any two exposure times is within a preset range in the obtained exposure time of all the lenses with the exposure time to be measured. The test system provides a brand-new exposure time synchronous detection scheme for 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 block diagram of a system for testing exposure time synchronization of multiple shots 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 block diagram of a control unit in a multi-lens exposure time synchronization system for a panoramic camera according to another embodiment of the 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 diagram of a system for synchronizing exposure times of multiple shots of a panoramic camera according to another embodiment of the present invention;
FIG. 8 is a block diagram of a determining unit in a multi-lens exposure time synchronization system for a panoramic camera according to another embodiment of the present invention;
FIG. 9 is a block diagram of a determining unit in a multi-lens exposure time synchronization system for a panoramic camera according to another embodiment of the present invention;
fig. 10 is a block diagram of a multi-lens exposure time synchronization system for 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 system for testing panoramic cameras, which is used for improving the precision and flexibility of the exposure time synchronization detection technology.
As shown in fig. 1, an embodiment of the present invention provides a system for testing exposure time synchronization of multiple shots of a panoramic camera, including: 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, as shown in fig. 5, 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.
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 the 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 preset range is, if the difference value of any two exposure times among the obtained exposure times of all the lenses of the exposure time to be detected is determined to be in the preset range, the better the synchronization effect of the exposure times of all the obtained lenses of the exposure time 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 the lens for obtaining all the exposure times to be measured, and determine that the exposure time of the lens for measuring any two exposure times is synchronous if the difference value between any two exposure times is within a 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 preset range among the obtained exposure times of the lenses for all the exposure times to be measured.
Alternatively, in another embodiment, as shown in fig. 7, the multi-lens exposure time synchronization system based on the test panoramic camera shown in fig. 1 further comprises a determining unit 6, where the determining unit 6 communicates with the panoramic camera 2. The determining unit 6 determines the exposure time of the lens of the exposure time to be measured according to the fan-shaped smear angle of the pointer 12 photographed in the image data.
In the embodiment of the present invention, based on the multi-lens exposure time synchronization system of the panoramic camera shown in fig. 1, as shown in fig. 8, the determining unit 6 may be built in the panoramic camera 2, directly acquire the image data from the lens module or the database shot by the panoramic camera 2, so as to determine the exposure time of the lens with the exposure time to be tested according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the exposure time of the lens with all the exposure times to be tested, and determine that the exposure time of the lens with any two exposure times to be tested is synchronous if the difference value of any two exposure times is within the preset range. Optionally, the determining unit is further configured to determine that, in the obtained exposure times of the lenses of all exposure times to be tested, the exposure times of the lenses of all exposure times to be tested are synchronous if the difference between every two exposure times is within the preset range.
In other embodiments, the determination unit 6 may be built in the control unit 5 as shown in fig. 9, based on the test panoramic camera multi-lens exposure time synchronization system shown in fig. 1. When the control unit 5 is in the panoramic camera 2, which is equivalent to the determining unit 6 being built in the panoramic camera 2, the image data may be directly obtained from a lens module or a database shot by the panoramic camera 2, so as to determine the exposure time of the lens with the exposure time to be measured according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the exposure time of the lens with all the exposure times to be measured, and determine that the exposure time of the lens with the exposure time to be measured is synchronous if the difference value of any two exposure times is within a preset range. The determining unit 6 may also obtain the image data from a lens module or a database shot by the panoramic camera 2 through the control unit 5, so as to determine the exposure time of the lens with the exposure time to be measured according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the exposure time of the lens with all the exposure times to be measured, and determine that the exposure time of the lens with the exposure time to be measured is synchronous if the difference value between any two exposure times is within a preset range. When the control unit 5 is outside the panoramic camera 2, the determining unit 6 may obtain the image data from the lens module or the database shot by the panoramic camera 2 through the control unit 5, so as to determine the exposure time of the lens with the exposure time to be tested according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the exposure time of the lens with all the exposure times to be tested, and determine that the exposure time of the lens with any two exposure times to be tested is synchronous if the difference value of any two exposure times is within the preset range. When the control unit 5 is external to the panoramic camera 2, the determination unit 6 may be further independently separated from the control unit 5, each of which is disposed outside the panoramic camera 2, and connected to the panoramic camera 2 through a wired interface such as remote communication or wired communication. In other embodiments, the function of the determining unit may be implemented by the control unit 5 instead of the determining unit 6, that is, the function of "determining the exposure time of the lens of the exposure time to be measured according to the fan-shaped smear angle of the pointer captured in the image data, determining the exposure time of the lens of all the obtained exposure times to be measured, and determining that the exposure times of the lenses of the two arbitrary exposure times are synchronous if the difference between the two arbitrary exposure times is within the preset range" may be implemented by the control unit 5 instead of the determining unit 6.
Alternatively, as shown in fig. 10, based on the test panoramic camera multi-lens exposure time synchronization system shown in fig. 1, the motor 10 is a motor 10 with a rotation number display; the image data includes the number of rotations of the pointer 12, the dial 11 and the angle scale 13, and the motor 10.
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.
Optionally, the determining unit 6 is further configured to, when the image data is video data, select a sector smear angle of the pointer 12 captured in a frame picture of a same frame position in the video data captured by each lens of the exposure time to be detected, and determine the exposure time of the lens of the exposure time to be detected.
During testing, the angles of the plane mirrors in front of the lens modules and the angles and the orientations of the constant-speed motors are adjusted, so that all the lenses of the panoramic camera 2 can completely and clearly shoot the turntable 11, the pointer 12 and the angle scale 13 through the plane mirrors. 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.
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 corresponding turntable is turned from the beginning to the photographed momentAngle ψ actually rotated at that time 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 N 11 、N 12 、N 13 、......、N 1K ， Andthe exposure time calculation formula of each lens module is as follows:
……
in the present embodiment, the determination unit 6 may determine the exposure times t for the K lenses of the panoramic camera e1 、t e2 、t e3 、......、t eK Comparing the difference value of any two exposure times with a preset range, and if the difference value of any two exposure times is within the preset range, determining that the exposure times of the lenses for measuring the any two exposure times are synchronous.
In other embodiments, the determination unit 6 may determine the exposure times t for K shots of the panoramic camera e1 、t e2 、t e3 、....、t eK And if the difference value of every two exposure times is within the preset range, determining that the exposure times of the lenses for measuring the exposure times to be measured corresponding to the exposure times are synchronous.
In other embodiments, the determination unit 6 may determine the exposure times t for K shots of the panoramic camera e1 、t e2 、t e3 、......、t eK And if the difference value of every two exposure times is within the preset range, determining that the exposure times of the lenses for measuring the exposure time corresponding to each exposure time in all the measured exposure times are synchronous.
In the above scheme, the problem that the exposure time of the panoramic camera multi-lens module cannot be tested in the prior art is solved by imaging the turntable 11 through the shooting plane mirror.
Optionally, the panoramic camera 2 includes two or more optical lenses.
Optionally, the panoramic camera 2 includes four fisheye optical lenses, the four fisheye optical lenses are distributed on four panels of the panoramic camera 2 in a one-to-one correspondence manner, 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.
Optionally, the testing device further 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.
Optionally, the testing device further includes an angle scale fixing piece, and the 360-degree angle scale 13 is fixedly connected to the periphery of one surface of the pointer 12 by the angle scale fixing piece, where the periphery of one surface of the pointer 12 is fixed by the turntable 11.
Optionally, the motor 10 is a constant-speed rotation motor 10, and a rotating shaft of the motor 10 is correspondingly installed at the center of the turntable 11.
Optionally, the color difference between the surface of the turntable 11 where the pointer 12 is arranged and the surface of the pointer 12 facing away from the turntable 11 is greater than a preset value.
Optionally, one end of the pointer 12 pointing to the periphery of the turntable 11 is an isosceles triangle, and a vertex angle of the isosceles triangle of one end of the pointer 12 pointing to the periphery of the turntable 11 falls on the periphery of the turntable 11.
Optionally, an end of the pointer 12 facing the center of the turntable 11 is an isosceles triangle, and a vertex angle of the isosceles triangle at an end of the pointer 12 facing the center of the turntable 11 falls on the center of the turntable 11.
Optionally, the diameter of the turntable 11 is greater than 10cm.
Optionally, the diameter of the angle scale 13 is greater than 1Ocm.
Optionally, the turntable 11 is a circular turntable, and the pointer 12 has a length equal to a radius of the circular turntable.
Optionally, the surface of the turntable 11, on which the pointer 12 is arranged, is white, and the surface of the pointer 12 facing away from the turntable 11 is black.
Optionally, the base lengths of all isosceles triangles are greater than or equal to 3 times the pointer width.
Optionally, all isosceles triangles are equilateral triangles.
From the above technical solutions, the embodiment of the present invention has the following advantages:
the embodiment of the invention provides a multi-lens exposure time synchronization system for testing a panoramic camera, which comprises the following steps: the device comprises a testing device 1, a panoramic camera 2 and a plurality of testing mirrors 33, wherein the number of the testing mirrors 33 is the same as that of at least two lenses of the panoramic camera 2, the testing mirrors 3 are used for imaging the turntable 11 facing the testing mirrors 3, and the lenses of all the lenses of the panoramic camera 2, the lenses of which are to be tested, are arranged opposite to the plurality of testing mirrors 3 in a one-to-one correspondence manner; the testing device 1 comprises a rotary table 11 with a motor 10, wherein a pointer 12 is fixed at the center of the rotary table 11, an angle scale 13 of 360 degrees is arranged on the periphery of one surface of the rotary table 11, which is fixed with the pointer 12, and the center of the angle scale 13 of 360 degrees is concentric with the center of the rotary table 11; a control unit 5 that controls a lens of the exposure time to be measured in the panoramic camera 2 to shoot image data including the pointer 12, the dial 11, and the angle scale 13 imaged in the test mirror 3 corresponding to the lens of the exposure time to be measured when the dial 11 rotates according to a predetermined rotation speed of the motor 10; and determining the exposure time of the lens with the exposure time to be measured according to the fan-shaped smear angle of the pointer 12 shot in the image data, and determining that the exposure time of the lens with the exposure time to be measured is synchronous if the difference value of any two exposure times is within a preset range in the obtained exposure time of all the lenses with the exposure time to be measured. The test system provides a brand-new exposure time synchronous detection scheme for 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 system embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and systems may be implemented in other manners. 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 system 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 (8)
1. A system for testing the exposure time synchronization of a panoramic camera, comprising: 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 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, which is used for fixing the pointer, the center of the angle scale of 360 degrees is concentric with the center of the turntable, each mirror is used for imaging the turntable facing the mirror, and the lenses of all the lenses of the panoramic camera, which are used for the exposure time to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors;
a control unit that controls a lens of the exposure time to be measured in the panoramic camera to capture image data including the pointer, the dial, and the angle scale imaged in the mirror corresponding to the lens of the exposure time to be measured when the dial is rotated according to a predetermined rotational speed of the motor;
the determining unit is used for determining the exposure time of the lens with the exposure time to be tested according to the fan-shaped smear angle of the pointer shot in the image data, wherein the exposure time is equal to the quotient obtained by dividing the fan-shaped smear angle by the angular speed of the turntable, and the difference value of any two exposure times among the obtained exposure times of the lens with the exposure time to be tested is determined to be in a preset range, so that the synchronization of the exposure times of the lenses with the exposure time to be tested is determined.
2. The system of claim 1, wherein the control unit is built in the panoramic camera, and after receiving an operation instruction of a user, the control unit sends a control instruction to a lens module of an exposure time to be tested in the panoramic camera, and the lens module controls a lens of the exposure time to be tested to shoot image data imaged in the test mirror corresponding to the lens of the exposure time to be tested.
3. The system of claim 1, wherein the control unit is externally arranged on the panoramic camera, is in remote communication with the panoramic camera or is connected through a communication interface, and after receiving an operation instruction of a user, the control unit sends a control instruction to a lens module of exposure time to be tested in the panoramic camera, and the lens module controls a corresponding lens of exposure time to be tested to shoot image data imaged in the test mirror corresponding to the lens of exposure time to be tested.
4. The system of claim 1, wherein the motor is a motor having a display of the number of rotations; the image data includes the pointer, the dial and the angle scale, and the number of rotations of the motor.
5. The system according to claim 1, wherein the determining unit is further configured to, when the image data is video data, select a sector smear angle of the pointer captured in a frame picture of a same frame position in the video data captured by each lens of the exposure time to be measured, and determine the exposure time of the lens of the exposure time to be measured.
6. The system of claim 1, wherein the panoramic camera comprises two or more optical lenses.
7. The system of claim 1, wherein the panoramic camera comprises four fisheye optical lenses, the four fisheye optical lenses are distributed on four panels of the panoramic camera in a one-to-one correspondence, the four fisheye optical lenses are in the same horizontal plane, and each panel is provided with a physical shooting button or a touch screen shooting control for controlling the correspondingly distributed fisheye optical lenses to shoot.
8. The system of claim 1, wherein the determination unit is internal to the panoramic camera; or the determining unit is arranged outside the panoramic camera and is in remote communication with the panoramic camera or connected through a communication interface; or, the determining unit is built in the control unit or replaced by the control unit to realize the function of the determining unit.
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