CN111629129B - Multi-bit concurrent ultra-large plane shooting system for tracking average light brightness - Google Patents
Multi-bit concurrent ultra-large plane shooting system for tracking average light brightness Download PDFInfo
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- CN111629129B CN111629129B CN202010166657.0A CN202010166657A CN111629129B CN 111629129 B CN111629129 B CN 111629129B CN 202010166657 A CN202010166657 A CN 202010166657A CN 111629129 B CN111629129 B CN 111629129B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
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Abstract
The invention discloses a multi-position concurrent ultra-large plane shooting system for tracking average light brightness, which comprises a control center, a stepping motor module, a tripod head control module, a light control module and a camera, wherein the control center is connected with the stepping motor module; the control center is used for calculating the motion angle of the stepping motor module and controlling the motion of the stepping motor module based on the motion angle; the stepping motor module is used for accurately controlling the holder control module to perform two-dimensional offset by reducing the moving angle of the synchronizing wheel; the holder control module is used for controlling the light control module to perform directional irradiation and controlling the camera to perform directional shooting based on the irradiation area of the light control module; the light control module is used for uniformly distributing light to the plane of the shot object according to a set track; the camera is used for carrying out segmentation shooting on a shot object plane. The system can solve the problem of large-format lighting.
Description
Technical Field
The invention relates to the field of plane shooting, in particular to a multi-position concurrent ultra-large plane shooting system for tracking average light brightness.
Background
When a photographer shoots a subject plane exceeding 2 square meters, it is obviously impossible to perform the task of requiring the light distribution of the general lighting at the four corners of the subject plane, i.e., the upper, lower, left, and right corners and the center, to be uniform. To address this problem, two solutions are proposed: (1) the shot object is moved to the outdoor and is level to the ground, the outdoor light-emitting cloud layer is used as huge light, light can be distributed evenly, but a photographer needs to float to work at high altitude, and the working difficulty is increased; (2) the object to be shot is moved to the outdoor and is perpendicular to the ground, the outdoor light-emitting cloud layer is used as huge light, but light rays are not uniform when the upper and lower angles of the plane of the object to be shot are shot, the area with adjustable light ray intensity on the ground is required to be larger than or equal to the area of the plane of the object to be shot, and the working cost is increased while the working intensity is reduced. In the case that many objects to be shot cannot be disassembled and cannot be moved, or the objects are too large and difficult to move, the light distribution requirement in shooting cannot be solved by using the sky light mentioned in the above two methods.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a multi-position concurrent tracking average light brightness super-large plane shooting system, which solves the problem of light distribution of large pictures and improves the completion degree of plane shooting work of a shot object by utilizing the synchronous operation of precision mechanical motion automatic control and upper computer software operation in cooperation with a camera.
In order to solve the technical problem, an embodiment of the present invention provides a multi-position concurrent ultra-large plane photographing system for tracking average light brightness, where the photographing system includes a control center, a stepping motor module, a pan-tilt control module, a light control module, and a camera, the control center is connected to the stepping motor module, the pan-tilt control module is connected to an output end of the stepping motor module, and one end of the pan-tilt control module is provided with the light control module and the camera; wherein the content of the first and second substances,
the control center is used for calculating the motion angle of the stepping motor module by using a mathematical rule and controlling the motion of the stepping motor module based on the motion angle through a servo system;
the step motor module is used for accurately controlling the holder control module to perform two-dimensional offset by reducing the moving angle of the synchronizing wheel;
the holder control module is used for controlling the light control module to perform directional irradiation and controlling the camera to perform directional shooting based on the irradiation area of the light control module;
the light control module is used for uniformly distributing light on the plane of the shot object according to a set track;
the camera is used for carrying out frame segmentation shooting on the plane of the shot object through the long-focus lens.
Optionally, the pan/tilt control module includes a first pan/tilt controller for controlling the camera and a pan/tilt control unit for controlling the light control module, and the pan/tilt control unit includes a second pan/tilt controller, a third pan/tilt controller, a fourth pan/tilt controller, and a fifth pan/tilt controller.
Optionally, the first pan-tilt controller is arranged at a position right opposite to the center of the plane of the object to be shot according to a set distance; the second pan-tilt controller is arranged at the position right opposite to the upper left corner of the plane of the shot object according to the set distance; the third holder controller is arranged at the right upper corner of the plane of the shot object at the right opposite position according to the set distance; the fourth pan-tilt controller is arranged at a position right opposite to the lower left corner of the plane of the shot object according to the set distance; and the fifth pan-tilt controller is arranged at the right lower corner dead against position of the plane of the shot object according to the set distance.
Optionally, the step motor module includes a first step motor for controlling the first pan/tilt controller and a step motor unit for controlling the pan/tilt control unit, and the step motor unit includes a second step motor for controlling the second pan/tilt controller, a third step motor for controlling the third pan/tilt controller, a fourth step motor for controlling the fourth pan/tilt controller and a fifth step motor for controlling the fifth pan/tilt controller.
Optionally, the light control module includes four incandescent lamps, four condenser lenses are disposed at light source output ends of the four incandescent lamps, and the four condenser lenses are configured to convert scattered light emitted by the four incandescent lamps into directable direct light.
Optionally, the four incandescent lights include a first incandescent light, a second incandescent light, a third incandescent light and a fourth incandescent light, the first incandescent light is arranged on the second pan/tilt/zoom controller, the second incandescent light is arranged on the third pan/tilt/zoom controller, the third incandescent light is arranged on the fourth pan/tilt/zoom controller, and the fourth incandescent light is arranged on the fifth pan/tilt/zoom controller.
Optionally, the coverage area of the direct light is larger than a rectangular area of 15cm × 15 cm.
Optionally, the step motor module is configured to calculate a movement angle of the step motor module by using a mathematical law, where the movement angle includes:
taking the camera as a central point, and acquiring the position distance between the light control module and the camera;
setting a moving track of the camera, and calculating a moving track of the light control module based on the moving track of the camera;
and establishing a mathematical model, and calculating the angle increment rate of the movement of the light control module and the camera along with the holder control module according to the movement track of the light control module and the movement track of the camera, so as to obtain the movement angle of the stepping motor module.
In the embodiment of the invention, the shooting system utilizes the precise mechanical motion automation control and the upper computer software operation to be matched with the synchronous operation of the camera, so that the matrix segmentation shooting of large pictures becomes automatic, convenient and high in efficiency. When the large picture is cut apart and shot, the offset of the holder control module is accurately controlled through the stepping motor module, the problem of light distribution of the large picture exceeding 10 square meters to 50 square meters is solved by innovatively applying low-power light, the requirement of uniform light distribution of four ends and the center of the large picture is met, the shooting difficulty of workers is reduced, and the completion degree of the shot works is improved. And the subsidiary module of the shooting system is convenient and movable, and can meet the professional requirement of nondestructive and contactless by adopting a battery, so that the large-picture digital acquisition work of the immovable cultural relics becomes practical.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a multi-bit super-large flat panel camera system for tracking average luminance concurrently according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a specific structure of a multi-bit super-large flat shooting system for tracking average luminance concurrently according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating an angular increment rate measurement of the movement of a second incandescent lamp in a light control module according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural composition diagram of a multi-bit concurrent average light brightness tracking super-large flat panel shooting system in an embodiment of the present invention, and fig. 2 is a schematic structural composition diagram of a multi-bit concurrent average light brightness tracking super-large flat panel shooting system in an embodiment of the present invention.
As shown in fig. 1, a multi-bit concurrent superlarge-area photographing system for tracking average light brightness, the photographing system comprising: control center, step motor module, cloud platform control module, light-operated module and camera, control center connects the step motor module, cloud platform control module connects the output of step motor module, cloud platform control module's one end is provided with light-operated module with the camera.
Specifically, the control center is used for calculating a motion angle of the stepping motor module by using a mathematical rule, and controlling the motion of the stepping motor module based on the motion angle through a servo system; the step motor module is used for accurately controlling the holder control module to perform two-dimensional offset by reducing the moving angle of the synchronizing wheel; the holder control module is used for controlling the light control module to perform directional irradiation and controlling the camera to perform directional shooting based on the irradiation area of the light control module; the light control module is used for uniformly distributing light on the plane of the shot object according to a set track; the camera is used for carrying out frame segmentation shooting on the plane of the shot object through the long-focus lens.
In a specific implementation process of the present invention, the pan/tilt control module includes a first pan/tilt controller for controlling the camera and a pan/tilt control unit for controlling the light control module, and the pan/tilt control unit includes a second pan/tilt controller, a third pan/tilt controller, a fourth pan/tilt controller, and a fifth pan/tilt controller.
The first pan-tilt controller is a working platform arranged on the camera support, has horizontal and vertical movement functions, and drives the camera to move in the same way when moving horizontally and vertically. The first holder controller and the camera are matched for use, so that the purpose of enlarging the shooting range can be achieved, and the use value of the camera is improved. Similarly, the four pan/tilt controllers included in the pan/tilt control unit can guarantee control of the light control module to operate synchronously, so that poor shooting effect caused by manual adjustment of the position of the light control module is avoided.
Specifically, the first pan-tilt controller is arranged at a position opposite to the center of the plane of the object to be shot according to a set distance; the second pan-tilt controller is arranged at the position right opposite to the upper left corner of the plane of the shot object according to the set distance; the third holder controller is arranged at the right upper corner of the plane of the shot object at the right opposite position according to the set distance; the fourth pan-tilt controller is arranged at a position right opposite to the lower left corner of the plane of the shot object according to the set distance; and the fifth pan-tilt controller is arranged at the right lower corner dead against position of the plane of the shot object according to the set distance.
It should be noted that the set distance is set by evaluating the photographing effect according to the illumination intensity of the light control module and the plane length of the object to be photographed, and a pan/tilt controller is respectively placed in front of each of the four ends of the plane of the object to be photographed, so that the plane of the object to be photographed can be completely placed in the photographing range by the arrangement of the light control module.
In a specific implementation process of the present invention, the step motor module includes a first step motor for controlling the first pan/tilt controller and a step motor unit for controlling the pan/tilt control unit, and the step motor unit includes a second step motor for controlling the second pan/tilt controller, a third step motor for controlling the third pan/tilt controller, a fourth step motor for controlling the fourth pan/tilt controller, and a fifth step motor for controlling the fifth pan/tilt controller.
The step motor module is used as a rotating device of the holder control module, and the working reliability of the step motor module directly influences the quality of the holder control module, so that the finishing accuracy of the shooting system is influenced. The step motor is an actuating mechanism for converting electric pulses into angular displacement, has the characteristic of no accumulated error (namely the precision is 100 percent), when a step driver receives a pulse signal, the step motor is driven to rotate by a fixed angle according to a set direction, the angular displacement is controlled by controlling the number of pulses, so that the purpose of accurate positioning is achieved, and meanwhile, the rotating speed and the acceleration of the step motor are controlled by controlling the pulse frequency, so that the purpose of speed regulation is achieved. The light distribution condition of the light control module can be adjusted in time according to the shooting requirement when the light control module is applied to the shooting system, and the camera is adjusted to the optimal position all the time in the shooting process.
In a specific implementation process of the present invention, the light control module includes four incandescent lamps, four condensing lenses are disposed at light source output ends of the four incandescent lamps, and the four condensing lenses are configured to convert scattered light emitted by the four incandescent lamps into directable direct light. The cover area of the direct light is larger than the rectangular area of 15cm multiplied by 15cm and is used as a main light source, and the condenser lens is matched with the incandescent lamp and is characterized by good shadow transition effect, most importantly, uniform light, light environment creation during shooting and long-time lighting. And the four condenser lenses have small areas, and ultraviolet resistance diaphragms or infrared resistance diaphragms are easy to increase, so that the nondestructive requirements of professional historical shooting can reach the standard.
Specifically, the four incandescent lights comprise a first incandescent light, a second incandescent light, a third incandescent light and a fourth incandescent light, the first incandescent light is arranged on the second pan/tilt/zoom controller, the second incandescent light is arranged on the third pan/tilt/zoom controller, the third incandescent light is arranged on the fourth pan/tilt/zoom controller, and the fourth incandescent light is arranged on the fifth pan/tilt/zoom controller. The four incandescent lamps are respectively arranged at the positions opposite to the four corners of the plane of the object to be shot, and the four incandescent lamps respectively point to the same position along with the camera in the shooting moving process of the camera, so that the illumination intensity of each local picture after the shooting is divided is basically the same, and the requirement of uniform light distribution of a working surface with a large picture is met. Optionally, the embodiment of the invention is not limited to the use of the pilot light, and can be replaced by a flash lamp applied in conventional photography, and the lighting requirement of a large picture can be met.
In the embodiment of the present invention, the light control module and the camera are controlled by the pan/tilt control module, the pan/tilt control module is controlled by the stepping motor module, and the movement of the stepping motor module is not separated from the control center to issue an instruction. Specifically, the control center comprises a servo system and an upper computer, wherein the servo system and the upper computer need to exchange information, the servo system comprises a single chip microcomputer with the model of STC89C52 and five drivers with the model of ULN2003A, and each driver is correspondingly connected with one stepping motor in the stepping motor module. In the specific implementation process, the upper computer calculates the movement angle information of the stepping motor module by using a mathematical law, and then sends the movement angle information to the single chip microcomputer through an RS232 communication bus, the single chip microcomputer processes the movement angle information, converts the movement angle information into pulse signals and outputs the pulse signals to the corresponding driver, and the driver drives the corresponding stepping motor to operate according to the received pulse signals.
Further, the upper computer calculates the movement angle information of the stepping motor module by using a mathematical rule, and the movement angle information comprises: taking the camera as a central point, and acquiring the position distance between the light control module and the camera; setting a moving track of the camera, and calculating a moving track of the light control module based on the moving track of the camera; and establishing a mathematical model, and calculating the angle increment rate of the movement of the light control module and the camera along with the holder control module according to the movement track of the light control module and the movement track of the camera, so as to obtain the movement angle of the stepping motor module. In practice, calculating the angular increment rate of the pan/tilt control unit movement may be replaced by calculating the angular increment rate of the light control module movement. As shown in fig. 3, under the condition that the motion trajectory of the light control module is known, a solving process of an angle increment rate of the second incandescent lamp in the light control module in the rotation process is listed as:
suppose X0O＝h，X0X1＝a，X1X2＝X2X3＝X3X4＝…＝XnXn+1＝x，
∠X0OX1＝θ0，∠X1OX2＝θ1，…，∠XnOXn+1＝θn，
Defined by a tangent, then θ0＝arctana/h
According to the definition of summation, Sn＝θ0+θ1+…+θn＝arctan(a+nx)/h
θn＝Sn-Sn-1＝arctan(a+nx)/h-arctan[a+(n-1)x]/h
Δθ＝θn-θn-1＝arctan(a+nx)/h-arctan[a+(n-2)x]/h
Wherein, h (i.e. X)0O) is the linear distance from the second pilot light to the object plane, a is the initial offset distance of the second pilot light, X is the center uniform offset distance of the second pilot light, and X is the center uniform offset distance of the second pilot lightiXi+1(i is 0,1, …, n) is the second pilot lamp from XiMoving the point to Xi+1Offset distance of point, thetai(i is 0,1, …, n) is the ith offset angle of the second pilot lamp, and is XiOXi+1(i is 0,1, …, n) is the second pilot lamp from XiTo Xi+1Angle of deviation of (D), SnFor the second pilot lamp from X0To Xn+1Where Δ θ is the angle increment rate of the second pilot light, n depends on the size of the object plane.
The four incandescent lamps in the light control module respectively solve the respective angle increment rates according to the solving process, then the current moving angle of the stepping motor is calculated based on the last moving angle of the corresponding stepping motor, and the current moving angle of the first stepping motor corresponding to the camera can be obtained in the same way. In a specific implementation process, the four incandescent lamps in the light control module respectively perform corresponding rotation irradiation according to a moving track of the camera, and when a superimposed light quantity is generated on the object plane to be shot, the camera uses the long-focus lens to perform local picture acquisition on the object plane to be shot, and then moves to the next local picture.
In the embodiment of the invention, the shooting system utilizes the precise mechanical motion automation control and the upper computer software operation to be matched with the synchronous operation of the camera, so that the matrix segmentation shooting of large pictures becomes automatic, convenient and high in efficiency. When the large picture is cut apart and shot, the offset of the holder control module is accurately controlled through the stepping motor module, the problem of light distribution of the large picture exceeding 10 square meters to 50 square meters is solved by innovatively applying low-power light, the requirement of uniform light distribution of four ends and the center of the large picture is met, the shooting difficulty of workers is reduced, and the completion degree of the shot works is improved. And the subsidiary module of the shooting system is convenient and movable, and can meet the professional requirement of nondestructive and contactless by adopting a battery, so that the large-picture digital acquisition work of the immovable cultural relics becomes practical.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
In addition, the above detailed description is made on a multi-bit concurrent average luminance brightness tracking super-large plane shooting system according to an embodiment of the present invention, and a specific example is used herein to explain the principle and the implementation of the present invention, and the above description of the embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. The shooting system comprises a control center, a stepping motor module, a tripod head control module, a light control module and a camera, wherein the control center is connected with the stepping motor module; wherein the content of the first and second substances,
the control center is used for calculating the motion angle of the stepping motor module by using a mathematical rule and controlling the motion of the stepping motor module based on the motion angle through a servo system;
the step motor module is used for accurately controlling the holder control module to perform two-dimensional offset by reducing the moving angle of the synchronizing wheel;
the holder control module is used for controlling the light control module to perform directional irradiation and controlling the camera to perform directional shooting based on the irradiation area of the light control module;
the light control module is used for uniformly distributing light on the plane of the shot object according to a set track;
the camera is used for carrying out frame division shooting on the plane of the shot object through the long-focus lens; the holder control module comprises a first holder controller for controlling the camera and a holder control unit for controlling the light control module, and the holder control unit comprises a second holder controller, a third holder controller, a fourth holder controller and a fifth holder controller;
the light control module and the camera are controlled by the holder control module, and the holder control module is controlled by the stepping motor module.
2. The ultra-large plane shooting system of claim 1, wherein the first pan-tilt controller is arranged at a position opposite to the center of the plane of the object to be shot according to a set distance; the second pan-tilt controller is arranged at the position right opposite to the upper left corner of the plane of the shot object according to the set distance; the third holder controller is arranged at the right upper corner of the plane of the shot object at the right opposite position according to the set distance; the fourth pan-tilt controller is arranged at a position right opposite to the lower left corner of the plane of the shot object according to the set distance; and the fifth pan-tilt controller is arranged at the right lower corner dead against position of the plane of the shot object according to the set distance.
3. The ultra-large plane shooting system of claim 1, wherein the stepping motor module comprises a first stepping motor for controlling the first pan/tilt controller and a stepping motor unit for controlling the pan/tilt control unit, and the stepping motor unit comprises a second stepping motor for controlling the second pan/tilt controller, a third stepping motor for controlling the third pan/tilt controller, a fourth stepping motor for controlling the fourth pan/tilt controller, and a fifth stepping motor for controlling the fifth pan/tilt controller.
4. The ultra-large plane photographing system of claim 1, wherein the light control module comprises four incandescent lamps, four condensing lenses are disposed at light source output ends of the four incandescent lamps, and the four condensing lenses are used for converting scattered light emitted by the four incandescent lamps into directable direct light.
5. The ultra-large plane shooting system according to claim 4, wherein the four incandescent lights comprise a first incandescent light, a second incandescent light, a third incandescent light and a fourth incandescent light, the first incandescent light is arranged on the second pan-tilt controller, the second incandescent light is arranged on the third pan-tilt controller, the third incandescent light is arranged on the fourth pan-tilt controller, and the fourth incandescent light is arranged on the fifth pan-tilt controller.
6. The ultra-large flat panel camera system of claim 4, wherein said direct light covers an area greater than a rectangular area of 15cm x 15 cm.
7. The ultra-large flat shooting system of claim 1, wherein the control center is configured to calculate the motion angle of the stepping motor module by using a mathematical law, and comprises:
taking the camera as a central point, and acquiring the position distance between the light control module and the camera;
setting a moving track of the camera, and calculating a moving track of the light control module based on the moving track of the camera;
and establishing a mathematical model, and calculating the angle increment rate of the movement of the light control module and the camera along with the holder control module according to the movement track of the light control module and the movement track of the camera, so as to obtain the movement angle of the stepping motor module.
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