CN211042119U - Modular fine setting camera target for demarcation - Google Patents
Modular fine setting camera target for demarcation Download PDFInfo
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- CN211042119U CN211042119U CN202020129952.4U CN202020129952U CN211042119U CN 211042119 U CN211042119 U CN 211042119U CN 202020129952 U CN202020129952 U CN 202020129952U CN 211042119 U CN211042119 U CN 211042119U
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Abstract
The utility model discloses a modular fine setting camera is markd and is used target, including first calibration board, second calibration board, third calibration board, frame and luminescent plate, first calibration board, second calibration board and third calibration board structural identity have a plurality of check black and white check, and wherein white check can the printing opacity, and black check can not the printing opacity, install the light source on the luminescent plate, first calibration board is inlayed at the front side position of frame, the luminescent plate is inlayed at the rear side position of frame, but the setting of second calibration board horizontal slip is inside the frame to be located the rear side position of first calibration board, beneficial effect does not need frequently to change the position of demarcation target at the demarcation in-process of demarcation, and the lead screw is connected to the controller, makes the accurate fine setting of demarcation target, can realize that target image size changes, makes the calibration result more accurate, and L light source board of accessible backplate carries out the light filling to the calibration board, can improve the demarcation precision under the environment that the light condition is not enough to reach basic demarcation task.
Description
Technical Field
The utility model belongs to the technical field of the robot, concretely relates to modular fine setting camera is markd and is used target.
Background
The calibration target is used for correcting and calibrating the distortion of a camera lens in machine vision, image measurement, photogrammetry, three-dimensional reconstruction and other applications; determining a conversion relation between the physical size and the pixel; the method comprises the steps of shooting an array flat plate with fixed-distance patterns by a camera, and obtaining a geometric model of the camera through calculation of a calibration algorithm, so that high-precision measurement and reconstruction results are obtained. Wherein the plate with the fixed pitch pattern array is the calibration target.
In the image measuring process and machine vision application, in order to determine the correlation between the three-dimensional geometric position of a certain point on the surface of a space object and the corresponding point in the re-image, a geometric model of camera imaging needs to be established, and the geometric model parameters are camera parameters. Under most conditions, the parameters must be obtained through experiments and calculation, and the process of solving the parameters is called camera calibration or video camera calibration. In image measurement or machine vision application, calibration of camera parameters is a very critical link, and the accuracy of a calibration result and the stability of an algorithm directly influence the accuracy of a result generated by the operation of a camera. Therefore, it is the main task of the present camera calibration to improve the accuracy of the camera calibration.
At present the wide chess black and white check pattern that adopts or the mark target of maring of solid circle array pattern, use a target to carry out a lot of removal or a plurality of target generally and arrange, thereby obtain multiunit experimental data, on the one hand, this kind of mark target has increased experimenter's work load, and at the not good night of sight, under the wind and dust weather, can't satisfy basic demarcation task, though can carry out the light filling through increasing the light source in order to improve the demarcation precision, but the light requirement to its light filling is very high, can increase manpower and financial cost, cause unnecessary waste. On the other hand, the method has defects in calibration speed and precision, and cannot meet application scenes of rapid calibration and high calibration precision.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, a combined fine-tuning target for camera calibration is provided.
The utility model provides a modular fine setting camera is markd and is used target, includes first calibration board, second calibration board, third calibration board, frame and luminescent plate, first calibration board, second calibration board and third calibration board structural identity have a plurality of check black and white check, and wherein white check can the printing opacity, and black check can not the printing opacity, install the light source on the luminescent plate, first calibration board is inlayed in the front side position of frame, the rear side position at the frame is inlayed to the luminescent plate, but second calibration board horizontal slip set up inside the frame to be located the rear side position of first calibration board, the third calibration board can be gliding from top to bottom set up inside the frame to be located the intermediate position of second calibration board and luminescent plate.
On the basis of the scheme, the combined fine-tuning camera calibration target is characterized in that a left-right adjusting screw rod is horizontally arranged in the outer frame in a rotatable mode, the left-right adjusting screw rod is driven to rotate by a first motor installed on the outer frame, a left-right adjusting nut is installed on the second calibration plate, and the left-right adjusting nut is in meshed transmission connection with the left-right adjusting screw rod.
On the basis of the scheme, the combined fine-tuning camera calibration target is characterized in that an up-and-down adjusting screw rod is vertically and rotatably arranged in the outer frame, the up-and-down adjusting screw rod is driven to rotate by a second motor installed on the outer frame, an up-and-down adjusting nut is installed on the third calibration plate, and the up-and-down adjusting nut is in meshed transmission connection with the up-and-down adjusting screw rod.
Preferably, the first motor and the second motor are stepping motors and are electrically connected with a remote controller to realize remote control.
Preferably, the combination formula fine setting camera is markd and is used the target, and frame internally mounted has magnetism to inhale the strip, and it is fixed to adsorb first calibration board and luminescent plate magnet, convenient change and maintenance.
Preferably, the combined fine-tuning camera calibration target is provided with a light emitting diode, and the light brightness can be adjusted.
The utility model has the advantages that:
1. in the calibration experiment process, the position of the calibration target does not need to be frequently changed, the controller is connected with the lead screw, so that the calibration target is accurately finely adjusted, the size change of the target image can be realized, and the calibration result is more accurate;
2. the calibration board can be supplemented with light through the L ED light source board of the back board, so that the calibration precision can be improved under the environment of insufficient light conditions, and a basic calibration task can be achieved;
the translation and the vertical movement of the calibration plate and the control of the light source of the light-emitting back plate of the diode can be controlled by a remote controller, so that the working efficiency can be improved, and the working cost can be reduced;
and 4, the inner wall of the outer frame of the calibration target is a magnetic suction inner wall, so that the calibration target and the diode light-emitting plate are easy to disassemble.
Drawings
Fig. 1 is a schematic view of a calibration plate according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an outer frame according to an embodiment of the present invention;
fig. 3 is a schematic view of a light-emitting plate according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, 2 and 3, a combined fine-tuning camera calibration target comprises a first calibration plate 1, a second calibration plate, a third calibration plate, an outer frame 2 and a light-emitting plate 3,
the first calibration plate 1, the second calibration plate and the third calibration plate have the same structure and are provided with black and white lattices of the chessboard, wherein the white lattices can transmit light, the black lattices cannot transmit light,
the light emitting diode is arranged on the light emitting plate 3, so that the brightness of light can be adjusted;
the first calibration plate 1 is embedded at the front side of the outer frame 2, the light emitting plate 3 is embedded at the rear side of the outer frame 2,
the second calibration plate can slide left and right in the outer frame 2 and is positioned at the rear position of the first calibration plate 1,
the third calibration plate is arranged inside the outer frame 2 in a manner of sliding up and down and is positioned in the middle of the second calibration plate and the light-emitting plate 3.
The inside rotatable level of frame 2 is provided with controls the regulation lead screw, control the regulation lead screw and rotate by the first motor drive of installing on frame 2, adjusting nut about installing on the second calibration board, controlling adjusting nut and controlling the regulation lead screw meshing transmission and being connected.
An up-down adjusting screw rod is rotatably and vertically arranged in the outer frame 2, the up-down adjusting screw rod is driven to rotate by a second motor arranged on the outer frame 2, an up-down adjusting nut is arranged on the third calibration plate, and the up-down adjusting nut is in meshed transmission connection with the up-down adjusting screw rod.
The first motor and the second motor are stepping motors and are electrically connected with the remote controller to realize remote control.
2 internally mounted of frame has magnetism to inhale the strip, and it is fixed to adsorb first calibration board 1 and 3 magnet of luminescent plate, convenient change and maintenance.
Description of the principle: first calibration board 1 is fixed, and the light source of different luminance is sent in 3 accessible remote control ware controls of luminescent plate, and second calibration board, third calibration board are controlled or are adjusted from top to bottom by accurate lead screw drive. Through the principle of projection, the opaque black areas of the second calibration plate and the third calibration plate shield the transparent white areas in the first calibration plate 1, the size of the image of the controllable target is adjusted, the target with a new size is formed, and the calibration precision of the camera is improved.
The size of the black and white grid image on the calibration plate can be adjusted through the remote controller, so that the calibration precision of the camera is improved. The back layer of the calibration plate is a diode light-emitting plate 3 with adjustable brightness, and the brightness can be manually adjusted, so that various complex environments can be met. Fine setting is carried out through accurate lead screw mechanism, and the lead screw is adjusted through remote control ware again, and the operation precision is high to but remote adjustment. The outer frame of the calibration target is a magnetic attraction inner wall, so that the calibration target and the diode light-emitting plate are easy to disassemble.
It is to be understood that although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A combined fine-tuning target for camera calibration is characterized by comprising a first calibration plate (1), a second calibration plate, a third calibration plate, an outer frame (2) and a light-emitting plate (3),
the first calibration plate (1), the second calibration plate and the third calibration plate have the same structure and are provided with a plurality of black and white lattices, wherein the white lattices can transmit light, the black lattices cannot transmit light,
a light source is arranged on the light-emitting plate (3),
the first calibration plate (1) is embedded at the front position of the outer frame (2), the light-emitting plate (3) is embedded at the rear position of the outer frame (2),
the second calibration plate can slide left and right and is arranged in the outer frame (2) and is positioned at the rear side of the first calibration plate (1),
the third calibration plate can be arranged in the outer frame (2) in a vertically sliding mode and is positioned in the middle of the second calibration plate and the light emitting plate (3).
2. The combined fine-tuning camera calibration target according to claim 1, wherein a left-right adjusting screw is rotatably horizontally arranged in the outer frame (2), the left-right adjusting screw is driven by a first motor mounted on the outer frame (2) to rotate, a left-right adjusting nut is mounted on the second calibration plate, and the left-right adjusting nut is in meshing transmission connection with the left-right adjusting screw.
3. The combined fine-tuning camera calibration target according to claim 1, wherein an up-down adjusting screw is rotatably and vertically arranged inside the outer frame (2), the up-down adjusting screw is driven to rotate by a second motor mounted on the outer frame (2), and an up-down adjusting nut is mounted on the third calibration plate and is in meshed transmission connection with the up-down adjusting screw.
4. The target for calibrating a combined fine-tuning camera according to claim 2 or 3, wherein the first motor and the second motor are stepping motors, and are electrically connected to a remote controller for remote control.
5. The target for calibrating the combined fine-tuning camera according to claim 1, wherein the outer frame (2) is internally provided with a magnetic strip for fixing the first calibration plate (1) and the light-emitting plate (3) by magnetic attraction, thereby facilitating replacement and maintenance.
6. The target for calibrating a combined fine-tuning camera according to claim 1, wherein the light source on the light-emitting plate (3) is a light-emitting diode, and the brightness of the light can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020129952.4U CN211042119U (en) | 2020-01-20 | 2020-01-20 | Modular fine setting camera target for demarcation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020129952.4U CN211042119U (en) | 2020-01-20 | 2020-01-20 | Modular fine setting camera target for demarcation |
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| CN211042119U true CN211042119U (en) | 2020-07-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076677A (en) * | 2020-01-20 | 2020-04-28 | 上海交通大学烟台信息技术研究院 | Modular fine setting camera target for demarcation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076677A (en) * | 2020-01-20 | 2020-04-28 | 上海交通大学烟台信息技术研究院 | Modular fine setting camera target for demarcation |
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