CN112118392A - Focusing and zooming control system of integrated optical equipment - Google Patents
Focusing and zooming control system of integrated optical equipment Download PDFInfo
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- CN112118392A CN112118392A CN202011074070.3A CN202011074070A CN112118392A CN 112118392 A CN112118392 A CN 112118392A CN 202011074070 A CN202011074070 A CN 202011074070A CN 112118392 A CN112118392 A CN 112118392A
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The invention discloses an integrated focusing and zooming control system of optical equipment, and relates to the technical field of optical control; the method aims to solve the problem that the focused image cannot be ensured to be the clearest image; the system specifically comprises a microprocessor, a digital image acquisition unit, a digital image processing unit, a storage unit and a driving unit, wherein the microprocessor is a control center; the signal output end of the digital image acquisition unit is in communication connection with the digital image processing unit, and the signal output end of the digital image processing unit is in communication connection with the microprocessor; and the switch control end of the driving unit is electrically connected with the microprocessor. The digital image acquisition unit is driven by the driving unit to move in a small amplitude, simultaneously acquires images continuously, evaluates the image quality of a series of acquired images through the digital image processing unit, judges whether the iris part is clear in image or not, and finishes the focusing process, thereby comparing the clearest image.
Description
Technical Field
The invention relates to the technical field of optical control, in particular to a focusing and zooming control system of integrated optical equipment.
Background
The existing optical device focus adjusting system generally provides rotary power through a motor, and then converts the rotary power into linear motion power through a secondary transmission mechanism to push an optical lens (group), thereby realizing the focusing/zooming function. Most of dimming and focusing systems for optical lenses in current practical applications rotate a lens cam, and a groove on the cam drives a lens in the lens to move, so that focusing and dimming functions of the lens are realized. The dimming and focusing mode has a complex mechanical structure and high requirements on mechanical designers, and has large errors caused by large return stroke difference of the mechanical structure during operation and large errors of a focal length value measured during continuous zooming. The cam processing has higher requirement on the precision of processing equipment, longer processing period and higher cost for processing the cam.
Through retrieval, the chinese patent application No. CN200610035079.7 discloses an integrated optical device focal length adjustment system, which includes an ultrasonic motor, wherein the ultrasonic motor is provided with at least one optical lens and an imaging element; the ultrasonic motor comprises a rotor and a stator, the rotor and the stator are directly driven through threaded connection, the optical lens body is arranged in the rotor or the stator, and the imaging element is arranged in the stator or the rotor; the inner wall of the central circular hole of the stator is provided with internal threads, and the outer surface of the rotor is provided with corresponding external threads; the surface of the thread is subjected to wear-resistant treatment or coated with wear-resistant materials; the motor comprises a second rotor, an optical lens body is arranged in the second rotor, external threads are additionally arranged on the outer surface of the second rotor, and the external threads are matched with threads in the stator. The integrated optical device focal length adjusting system in the above patent has the following disadvantages: although the focus of the acquisition device can be adjusted, the focused image of the acquisition device cannot be ensured to be the clearest image.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a focusing and zooming control system of an integrated optical device.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated focusing and zooming control system for optical equipment comprises a microprocessor, a digital image acquisition unit, a digital image processing unit, a storage unit and a driving unit, wherein the microprocessor is a control center; the signal output end of the digital image acquisition unit is in communication connection with the digital image processing unit, and the signal output end of the digital image processing unit is in communication connection with the microprocessor; the switch control end of the driving unit is electrically connected with the microprocessor; and the signal input end of the storage unit is in communication connection with the digital image acquisition unit.
Preferably: the digital image acquisition unit comprises a camera and an infrared illuminating lamp, and the switch control end of the camera is electrically connected with the microprocessor.
Preferably: the digital image processing unit comprises a comparison module and an image judgment module, the comparison module processes local information in the collected image and extracts criteria, and the contrast of the local information is extracted to be used as a focusing basis.
Preferably: the comparison module extracts different criteria for focusing according to different use requirements.
Preferably: the image judging module extracts effective information in the shot image for judgment by utilizing the gradient information, wherein the effective information is frequency and phase.
Preferably: the camera comprises a front lens module, a zooming module, a compensation module and a rear lens module.
Preferably: the compensation module includes temperature sensing.
Preferably: the drive unit comprises an electric slide rail, and the outer wall of the bottom of the digital image acquisition unit is connected to the inner wall of the electric slide rail in a sliding mode through a slide block.
The invention has the beneficial effects that:
1. when the distance between the shot object and the camera is within a certain range, the digital image acquisition unit is driven by the driving unit to move in a small range, meanwhile, the digital image acquisition unit continuously acquires images, the digital image processing unit evaluates the image quality of a series of acquired images, judges whether the iris part is clear in image formation, and completes the focusing process, so that the clearest image is compared.
2. The microprocessor gives out control signals to directly control the operation of the digital image acquisition unit, the driving unit can be conveniently controlled by the microprocessor, focusing and zooming are convenient, and images acquired by the digital image acquisition unit are recorded in the storage unit after being processed by the digital image processing unit.
3. When the digital image processing unit is used for carrying out image quality evaluation on a series of collected images, the positions of the zooming module and the compensation module away from the rear lens module are adjusted according to whether imaging is clear, and the optimal zooming angle is selected.
4. Under the action of the infrared illuminating lamp, the iris part has clear imaging, the pupil outline is obvious, the iris part has higher contrast, the texture features are rich and obvious, the automatic focusing is accurate, and the requirement of iris image acquisition can be met.
Drawings
FIG. 1 is a schematic flow chart of a focusing and zooming control system for an integrated optical device according to the present invention;
FIG. 2 is a schematic diagram of a focusing process of a focusing and zooming control system of an integrated optical device according to the present invention;
fig. 3 is a schematic zoom flow diagram of a focusing and zooming control system of an integrated optical device according to the present invention.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
An integrated optical device focusing and zooming control system is shown in fig. 1-3 and comprises a microprocessor, a digital image acquisition unit, a digital image processing unit, a storage unit and a driving unit, wherein the microprocessor is a control center; the signal output end of the digital image acquisition unit is in communication connection with the digital image processing unit, and the signal output end of the digital image processing unit is in communication connection with the microprocessor; the switch control end of the driving unit is electrically connected with the microprocessor; the signal input end of the storage unit is in communication connection with the digital image acquisition unit, and the image acquired by the digital image acquisition unit is processed by the digital image processing unit and then recorded in the storage unit.
The digital image acquisition unit comprises a camera and an infrared illuminating lamp, the camera is of a structure for shooting images, and a switch control end of the camera is electrically connected with the microprocessor; the infrared illuminating lamp is used for supplementing light when the camera shoots an image, so that the focusing and zooming images clearly.
The digital image processing unit comprises a comparison module and an image judgment module, the comparison module is used for processing and extracting local information in an acquired image, the contrast of the extracted local information is used as a focusing basis and is compared with a previous image, if the contrast is enhanced, a signal is transmitted to the microprocessor, the microprocessor is electrically connected with the driving unit to start, the digital image acquisition unit is driven to move, and the image acquisition is continued; if the contrast is not enhanced, a signal is transmitted to the microprocessor, the microprocessor is electrically connected with the driving unit to start and return, and the digital image acquisition unit is driven to return to the position where the previous image is acquired, so that the clearest image can be conveniently compared.
Furthermore, the comparison module extracts different criteria for focusing according to different use requirements.
Further, the image judgment module extracts effective information in the shot image for judgment by using the gradient information, wherein the effective information is frequency, phase and the like, and for the image with high-frequency information, the more accurate the focusing is, the higher the frequency of the image signal is, the sharper the edge is, and the frequency is reduced when the image is out of focus, and the edge is relatively smooth.
The camera comprises a front lens module, a zooming module, a compensation module and a rear lens module, wherein the front lens module is a module which converges to focus, the zooming module is a focal length which changes a lens, the compensation module is the deviation of an image surface position of the lens in the zooming process, the front lens module, the zooming module and the compensation module converge scenery of an object space into primary imaging, and the rear lens module converges the primary imaging into secondary imaging.
Furthermore, the compensation module comprises a temperature detector, the image is acquired by comparing the digital image processing unit, when the ambient temperature is lower than a set value, the zooming module and the compensation module translate along the line towards the position far away from the rear lens module, and when the ambient temperature is higher than the set value, the zooming module and the compensation module translate along the line towards the position close to the rear lens module.
The driving unit comprises an electric slide rail, the outer wall of the bottom of the digital image acquisition unit is connected to the inner wall of the electric slide rail in a sliding mode through a slide block, and the electric slide rail is started, so that the digital image acquisition unit moves back and forth, and focusing and zooming operations of images are conveniently acquired.
When the embodiment is used, the microprocessor gives a control signal to directly control the operation of the digital image acquisition unit, the driving unit can be conveniently controlled by the microprocessor to facilitate focusing and zooming, when the distance between a photographed object and the camera is within a certain range, the digital image acquisition unit is driven by the driving unit to move in a small range, the digital image acquisition unit continuously acquires images, the digital image processing unit evaluates the image quality of a series of acquired images to judge whether the iris part is clear in image formation, when the digital image acquisition unit moves to a proper position and the iris image formation is clear, the automatic focusing process is finished when the requirements of subsequent processing and mode identification are met, when photographing, temperature detection detects the change of ambient temperature in real time, and when the ambient temperature is lower than a set value, the zooming module and the compensation module translate along the line to the position far away from the rear lens module, when the ambient temperature is higher than a set value, the zooming module and the compensation module are translated along the line to the position close to the rear lens module, the image quality of a series of collected images is evaluated through the digital image processing unit, the position of the zooming module and the position of the compensation module away from the rear lens module are adjusted according to whether the images are clear or not, the optimal zooming angle is selected, namely, the automatic zooming process is completed, finally, the images subjected to focusing and zooming are stored in the storage unit, under the action of an infrared illuminating lamp, the images of the iris part are clear, the pupil outline is obvious, the iris part has high contrast, the texture characteristics are rich and obvious, the automatic focusing is accurate, and the requirement of iris image collection can be met.
Example 2
An integrated optical device focusing and zooming control system is shown in fig. 1-3 and comprises a microprocessor, a digital image acquisition unit, a digital image processing unit, a storage unit and a driving unit, wherein the microprocessor is a control center; the signal output end of the digital image acquisition unit is in communication connection with the digital image processing unit, and the signal output end of the digital image processing unit is in communication connection with the microprocessor; the switch control end of the driving unit is electrically connected with the microprocessor; the signal input end of the storage unit is in communication connection with the digital image acquisition unit, and the image acquired by the digital image acquisition unit is processed by the digital image processing unit and then recorded in the storage unit.
The digital image acquisition unit comprises a camera and an infrared illuminating lamp, the camera is of a structure for shooting images, and a switch control end of the camera is electrically connected with the microprocessor; the infrared illuminating lamp is used for supplementing light when the camera shoots an image, so that the focusing and zooming images clearly.
The digital image processing unit comprises a comparison module and an image judgment module, the comparison module is used for processing and extracting local information in an acquired image, the contrast of the extracted local information is used as a focusing basis and is compared with a previous image, if the contrast is enhanced, a signal is transmitted to the microprocessor, the microprocessor is electrically connected with the driving unit to start, the digital image acquisition unit is driven to move, and the image acquisition is continued; if the contrast is not enhanced, a signal is transmitted to the microprocessor, the microprocessor is electrically connected with the driving unit to start and return, and the digital image acquisition unit is driven to return to the position where the previous image is acquired, so that the clearest image can be conveniently compared.
The camera comprises a front lens module, a zooming module, a compensation module and a rear lens module, wherein the front lens module is a module which converges to focus, the zooming module is a focal length which changes a lens, the compensation module is the deviation of an image surface position of the lens in the zooming process, the front lens module, the zooming module and the compensation module converge scenery of an object space into primary imaging, and the rear lens module converges the primary imaging into secondary imaging.
Furthermore, the compensation module comprises a temperature detector, the image is acquired by comparing the digital image processing unit, when the ambient temperature is lower than a set value, the zooming module and the compensation module translate along the line towards the position far away from the rear lens module, and when the ambient temperature is higher than the set value, the zooming module and the compensation module translate along the line towards the position close to the rear lens module.
The driving unit comprises an electric slide rail, the outer wall of the bottom of the digital image acquisition unit is connected to the inner wall of the electric slide rail in a sliding mode through a slide block, and the electric slide rail is started, so that the digital image acquisition unit moves back and forth, and focusing and zooming operations of images are conveniently acquired.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. An integrated focusing and zooming control system of optical equipment comprises a microprocessor, a digital image acquisition unit, a digital image processing unit, a storage unit and a driving unit, and is characterized in that the microprocessor is a control center; the signal output end of the digital image acquisition unit is in communication connection with the digital image processing unit, and the signal output end of the digital image processing unit is in communication connection with the microprocessor; the switch control end of the driving unit is electrically connected with the microprocessor; and the signal input end of the storage unit is in communication connection with the digital image acquisition unit.
2. The system of claim 1, wherein the digital image capturing unit comprises a camera and an infrared illuminating lamp, and a switch control terminal of the camera is electrically connected to the microprocessor.
3. The system of claim 2, wherein the digital image processing unit comprises a comparison module and an image judgment module, the comparison module processes the local information in the captured image and extracts criteria, and the contrast of the local information is extracted as a basis for focusing.
4. The system of claim 3, wherein the comparison module extracts different criteria for focusing according to different usage requirements.
5. The system of claim 4, wherein the image determination module is configured to determine by extracting effective information from the captured image, the effective information being frequency and phase, using the gradient information.
6. The integrated optical device focus and zoom control system of claim 5, wherein the camera comprises a front lens module, a zoom module, a compensation module, and a rear lens module.
7. The integrated optical device focus-zoom control system of claim 6, wherein the compensation module comprises temperature detection.
8. The system of any one of claims 1 to 7, wherein the driving unit comprises a power slide rail, and the bottom outer wall of the digital image capturing unit is slidably connected to the inner wall of the power slide rail through a slider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011074070.3A CN112118392A (en) | 2020-10-09 | 2020-10-09 | Focusing and zooming control system of integrated optical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011074070.3A CN112118392A (en) | 2020-10-09 | 2020-10-09 | Focusing and zooming control system of integrated optical equipment |
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| Publication Number | Publication Date |
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| CN112118392A true CN112118392A (en) | 2020-12-22 |
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| CN202011074070.3A Pending CN112118392A (en) | 2020-10-09 | 2020-10-09 | Focusing and zooming control system of integrated optical equipment |
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- 2020-10-09 CN CN202011074070.3A patent/CN112118392A/en active Pending
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