CN110505368B - Multi-lens exposure time synchronization system for panoramic camera testing - Google Patents
Multi-lens exposure time synchronization system for panoramic camera testing Download PDFInfo
- Publication number
- CN110505368B CN110505368B CN201910806730.3A CN201910806730A CN110505368B CN 110505368 B CN110505368 B CN 110505368B CN 201910806730 A CN201910806730 A CN 201910806730A CN 110505368 B CN110505368 B CN 110505368B
- Authority
- CN
- China
- Prior art keywords
- exposure time
- lens
- panoramic camera
- lenses
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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; the exposure time of the lens of the exposure time to be measured is determined according to the fan-shaped smear angle of the pointer shot in the image data, the average exposure time of all the exposure times to be measured is determined, and if the difference value between the exposure time of any lens of the exposure times to be measured and the average exposure time is determined to be in a preset range, the exposure time of the lens to be measured is determined to be 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 of multiple lenses of a panoramic camera, where the system is applied to a system for testing exposure time of multiple lenses 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 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, when the dial rotates according to a predetermined rotational speed of the motor, 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, to determine an exposure time of the lens of the exposure time to be measured according to a fan-shaped smear angle of the pointer captured in the image data, and to determine an average exposure time of exposure times of all obtained lenses of the exposure time to be measured; 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 preset range.
Optionally, the device further comprises a determining unit, configured to determine an exposure time of the lens of the exposure time to be tested according to a fan-shaped smear angle of the pointer captured in the image data, and determine an average exposure time of exposure times of all obtained lenses of 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 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 exposure times of the obtained lenses with all exposure times to be tested, a difference between each exposure time and the average exposure time is within the preset range, and determine that exposure times of the lenses with all exposure times to be tested are 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.
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.
Optionally, the determining unit is further configured to determine a maximum value of all differences between each of the obtained exposure times and the average exposure time among a plurality of or all exposure times of the lenses of all exposure times to be measured, and determine that the maximum value is within a target range, and determine that the plurality of or all exposure times of the lenses of all exposure times to be measured are synchronous.
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; 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, determining the average exposure time of the exposure time of all the obtained lenses with the exposure time to be measured, and determining that the difference value between the exposure time of any lens with the exposure time to be measured and the average exposure time is within a preset range, wherein the exposure time of any lens with the exposure time to be measured is synchronous. 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 11. The center of the turntable is arranged opposite to the center of the rotating shaft of the motor 11.
Optionally, the turntable 11 is detachably connected to said motor 11.
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 of 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 of the exposure time to be tested, determines that the difference between the exposure time of any (or a plurality of or all) lenses of the exposure time to be tested and the average exposure time is within a preset range, and determines that the exposure time of the lens of the exposure time to be tested is synchronous. The smaller the value of the preset range, if it is determined that the difference between the exposure time of any (one or more or all) lenses of the exposure time to be detected and the average exposure time is within the preset range, the better the synchronization effect of the exposure time of the lens 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 tested through simulation software or calculation software, and determine that the difference between the exposure time of any (or one or more or all) lenses for the exposure time to be tested and the average exposure time is within a preset range, and determine that the exposure time of any lens for measuring the exposure time is 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 0 degree scale,
When the fan-shaped smear crosses the 0 degree scale,
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, in the exposure time of the obtained lenses with all exposure times to be tested, the difference value between each exposure time and the average exposure time is within the preset range, and then the exposure time synchronization of the lenses with all exposure times to be tested is determined.
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 test 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 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 tested according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the average exposure time of the exposure times of all the obtained lenses with the exposure time to be tested, determine that the difference between the exposure time of any lens with the exposure time to be tested and the average exposure time is within a preset range, and determine that the exposure time of the lens with the exposure time to be tested is synchronous. Optionally, the determining unit 6 is further configured to determine that, among the obtained exposure times of the lenses of all exposure times to be measured, each of the exposure times is within the preset range, and determine that the exposure times of the lenses of all exposure times to be measured are synchronous.
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, the determining unit 6 is 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 tested according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the average exposure time of the exposure times of all the obtained lenses with the exposure time to be tested, determine that the difference between the exposure time of any lens with the exposure time to be tested and the average exposure time is within a preset range, and determine that the exposure times of the lenses with the exposure times to be tested are synchronous. 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 average exposure time of the obtained exposure times of the lenses with all the exposure times to be measured, determine that the difference between the exposure time of any lens with the exposure time to be measured and the average exposure time is within a preset range, and determine that the exposure times of the lenses with the exposure times to be measured are synchronous. When the control unit 5 is outside the panoramic camera 2, the determining unit 6 may 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 tested according to the fan-shaped smear angle of the pointer 12 shot in the image data, determine the average exposure time of the exposure times of all the obtained lenses with the exposure time to be tested, determine that the difference between the exposure time of any lens with the exposure time to be tested and the average exposure time is within a preset range, and determine that the exposure times of the lenses with the exposure time to be tested are synchronous. 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 average exposure time of the obtained exposure times of the lenses of all the exposure times to be measured, determining that the difference between the exposure time of any one lens of the exposure times to be measured and the average exposure time 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 respectively
And->
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 smear
And->
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 time
The calculation formula of (2) is as follows:
the exposure time deviation deltat of each lens module e1 、Δt e2 、Δt e3 、……、Δt eK The method comprises the following steps:
……
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 Any of the exposure times and the average exposure time
Comparing the difference between said arbitrary number of said exposure times and the average exposure time with a preset range>
If the difference value of the lens is within the preset range, determining that the exposure time of the lens for measuring any one of the exposure times is 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 Each of the plurality of exposure times is equal to an average exposure time
Respectively, with a preset range if each of the plurality of exposure times is +.>
If the difference value of the lens is within the preset range, determining that the exposure time of the lenses for measuring the exposure times is 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 Each of the all exposure times and the average exposure time
Respectively, with a preset range if each of all exposure times is +.>
If the difference between the measured exposure times is within the preset range, the exposure times of the lenses for measuring all exposure times are determined to be synchronous.
In other embodiments, the determination unit 6 may determine the exposure time t of K shots of the panoramic camera e1 、t e2 、t e3 、……、t eK In (a) or all exposure times, eachThe maximum value deltat of all differences of the exposure time and 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 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 the scheme, the problem that the exposure time of the conventional panoramic camera multi-lens module cannot be tested synchronously 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 10cm.
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; 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, determining the average exposure time of the exposure time of all the obtained lenses with the exposure time to be measured, and determining that the difference value between the exposure time of any lens with the exposure time to be measured and the average exposure time is within a preset range, wherein the exposure time of any lens with the exposure time to be measured is synchronous. 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 (11)
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, each mirror is used for imaging the turntable facing the mirror, and the lenses of all the lenses of the panoramic camera, the lenses of which the exposure time is to be tested, are oppositely arranged in a one-to-one correspondence manner with the plurality of mirrors; a pointer is fixed at the center of the turntable, a 360-degree angle scale is arranged on the periphery of one surface of the turntable, where the pointer is fixed, and the center of the 360-degree angle scale is concentric with the center of the turntable;
and a control unit for controlling the lenses of the exposure time to be measured 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 lenses of the exposure time to be measured when the turntable rotates according to the preset rotating speed of the motor, determining the exposure time of the lenses of the exposure time to be measured according to the fan-shaped smear angle of the pointer shot in the image data, determining the average exposure time of the exposure times of all the obtained lenses of the exposure time to be measured, and determining that the difference value between the exposure time of any lens of the exposure time to be measured and the average exposure time is in a preset range, wherein the exposure time of any lens of the exposure time to be measured is determined to be synchronous.
2. The system according to claim 1, further comprising a determining unit for determining an exposure time of the lens of the exposure time to be measured from a fan-shaped smear angle of the pointer photographed in the image data, and for determining an average exposure time of the exposure times of the lenses of all the obtained exposure times to be measured; 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 preset range.
3. The system according to claim 1 or 2, 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 the exposure time to be tested in the panoramic camera, and the lens module controls the corresponding 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.
4. The system according to claim 1 or 2, 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.
5. The system of claim 1 or 2, wherein the motor is a motor with 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.
6. The system according to claim 2, 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.
7. The system according to claim 2 or 6, wherein the determining unit is further configured to determine that, among the obtained exposure times of the lenses of all exposure times to be measured, each of the exposure times has a difference from the average exposure time within the preset range, and determine that the exposure times of the lenses of all exposure times to be measured are synchronized.
8. The system of claim 1 or 2, wherein the panoramic camera comprises two or more optical lenses.
9. The system of claim 1 or 2, 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 key or a touch screen shooting control for controlling the correspondingly distributed fisheye optical lenses to shoot.
10. The system of claim 2, 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.
11. The system according to claim 2, wherein the determining unit is further configured to determine a maximum value of all differences between each of the obtained exposure times and the average exposure time among a plurality of or all exposure times of the lenses of all exposure times to be measured, and determine that the plurality of or all exposure times of the lenses of all exposure times to be measured are synchronized if the maximum value is determined to be within a target range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806730.3A CN110505368B (en) | 2019-08-29 | 2019-08-29 | Multi-lens exposure time synchronization system for panoramic camera testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806730.3A CN110505368B (en) | 2019-08-29 | 2019-08-29 | Multi-lens exposure time synchronization system for panoramic camera testing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110505368A CN110505368A (en) | 2019-11-26 |
| CN110505368B true CN110505368B (en) | 2023-06-06 |
Family
ID=68590453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910806730.3A Active CN110505368B (en) | 2019-08-29 | 2019-08-29 | Multi-lens exposure time synchronization system for panoramic camera testing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110505368B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014230018A (en) * | 2013-05-21 | 2014-12-08 | キヤノン株式会社 | Photographing device, imaging system, control method of imaging device, program, and storage medium |
| CN104965387A (en) * | 2015-07-15 | 2015-10-07 | 深圳市明宇通检测有限公司 | Exposure time, frame rate and smear test device and test method |
| CN107959797A (en) * | 2017-12-14 | 2018-04-24 | 中国电子科技集团公司电子科学研究院 | Panorama optical field acquisition device, processing method and computing device based on camera array |
| CN108737738A (en) * | 2018-04-20 | 2018-11-02 | 深圳岚锋创视网络科技有限公司 | A kind of panorama camera and its exposure method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019079219A1 (en) * | 2017-10-19 | 2019-04-25 | DeepMap Inc. | Calibrating sensors mounted on an autonomous vehicle |
-
2019
- 2019-08-29 CN CN201910806730.3A patent/CN110505368B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014230018A (en) * | 2013-05-21 | 2014-12-08 | キヤノン株式会社 | Photographing device, imaging system, control method of imaging device, program, and storage medium |
| CN104965387A (en) * | 2015-07-15 | 2015-10-07 | 深圳市明宇通检测有限公司 | Exposure time, frame rate and smear test device and test method |
| CN107959797A (en) * | 2017-12-14 | 2018-04-24 | 中国电子科技集团公司电子科学研究院 | Panorama optical field acquisition device, processing method and computing device based on camera array |
| CN108737738A (en) * | 2018-04-20 | 2018-11-02 | 深圳岚锋创视网络科技有限公司 | A kind of panorama camera and its exposure method and device |
Non-Patent Citations (1)
| Title |
|---|
| 全景摄像机的原理与进展;林泉等;《自然杂志》;20170425(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110505368A (en) | 2019-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103795924B (en) | Panorama camera arrangement and method | |
| CN108830906B (en) | Automatic calibration method for camera parameters based on virtual binocular vision principle | |
| CN103945117B (en) | Capture apparatus, cooperating image pickup method and have recorded the recording medium of program | |
| CN104965387B (en) | A kind of time for exposure, frame per second and smear test device and its method of testing | |
| KR101225443B1 (en) | Rotating quter-circle arc camera frame for measuring variation of part and method for measuring variation of part using the same | |
| CN110536130B (en) | Method for testing multi-lens frame synchronization of panoramic camera | |
| CN203686506U (en) | Panoramic pan-tilt shooting device | |
| CN109587475A (en) | Digital camera dynamic resolution measuring technique and device | |
| JP2002232768A (en) | Imaging apparatus for al-round image | |
| CN110505474B (en) | Multi-lens exposure time synchronization system for panoramic camera testing | |
| CN110446032B (en) | Method for testing synchronization of exposure time of multiple lenses of panoramic camera | |
| CN110446033B (en) | Multi-lens frame synchronization system for panoramic camera testing | |
| WO2005004498A1 (en) | System and method for measuring/evaluating moving image quality of screen | |
| CN110505368B (en) | Multi-lens exposure time synchronization system for panoramic camera testing | |
| CN110519483B (en) | Multi-lens frame synchronization system for panoramic camera testing | |
| CN110446034A (en) | A kind of more camera lens frame synchronization systems of test panorama camera | |
| CN108124127B (en) | Panoramic scanning monitoring system | |
| CN110515264B (en) | System for testing multi-lens exposure time of panoramic camera | |
| CN110446027B (en) | Method for testing exposure time of camera equipment | |
| CN109769082B (en) | Virtual studio construction system and recording method based on VR tracking | |
| CN116309881A (en) | Tripod head camera external parameter measuring and calculating method, device, equipment and medium | |
| CN211378160U (en) | Device for testing exposure time of camera equipment | |
| CN213238939U (en) | Image motion compensation test device | |
| WO2022036512A1 (en) | Data processing method and device, terminal, and storage medium | |
| CN114441137A (en) | Camera time delay measuring system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Building 4D, Gongyanhui Science and Technology Industrial Park, No. 160, Xihu West Road, Wujin National High and New Technology Industrial Development Zone, Changzhou City, Jiangsu Province, 213166 Applicant after: Pi Technology (Changzhou) Co.,Ltd. Address before: 518052 102, building C11, TCL Science Park, 1001 Zhongshan Garden Road, Nanshan District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN PISOFTTECH TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |