CN116074617A - Integrated array camera and imaging control method thereof - Google Patents
Integrated array camera and imaging control method thereof Download PDFInfo
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- CN116074617A CN116074617A CN202310341953.3A CN202310341953A CN116074617A CN 116074617 A CN116074617 A CN 116074617A CN 202310341953 A CN202310341953 A CN 202310341953A CN 116074617 A CN116074617 A CN 116074617A
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Abstract
The invention relates to an integrated array camera and an imaging control method thereof, wherein the integrated array camera comprises a main control unit and a plurality of camera modules; the camera module comprises an interface circuit board, an image sensor chip, a lens driving base and a lens; the image sensor chip is arranged on the interface circuit board; the lens driving base is arranged on the interface circuit board; the lens is arranged on the lens driving base and is driven by the motor to perform telescopic focusing; the lens is matched and electrically connected with the image sensor chip; the interface circuit boards of the camera modules are electrically connected with the main control unit; each camera module only carries out focusing search and image picking on a sub-level focusing search area which is divided from the focusing search area along the focus adjustment direction, and the sub-level focusing search areas corresponding to each camera module are combined to form a complete focusing search area. The invention divides the focusing search area and makes the imaging efficiency greatly improved by synchronous division focusing search and image acquisition of a plurality of camera modules.
Description
Technical Field
The present invention relates to an appearance detection photographing apparatus, and more particularly, to an integrated array camera and an imaging control method thereof.
Background
In the field of machine vision, industrial cameras are often used to capture images of the appearance of manufactured parts, so as to facilitate intelligent quality detection by using a detection algorithm. Because a single part may have more imaging parts to be detected, a camera is generally required to perform multiple shots to complete a quality inspection. Therefore, in order to improve the efficiency of quality inspection, it is desirable to shorten the overall shooting time for individual parts as much as possible.
One possible technical means is to use a combination of multiple industrial cameras to expand the imaging field of view and to take a photograph at the same time. However, the scheme has the defects that a plurality of industrial cameras are high in cost, the structure is bulky and complex, and the deployment is complicated; and it is difficult to ensure synchronization of photographing times of a plurality of cameras due to delay of the transmission cable. For a single camera, a general auto-focusing process is as follows, an image is collected at a mechanical position where each lens is located, focus definition evaluation is performed through an image definition algorithm, and a lens position where the definition can reach the maximum value is searched for through multiple searches, so that auto-focusing is completed. To find the best focus position, it is often necessary to search through all positions, so the focusing process is slow.
Disclosure of Invention
A first object of the present invention is to provide an integrated array camera, which controls a plurality of integrally designed camera modules simultaneously through a main control unit, so as to achieve equal imaging of a plurality of independent camera modules, and has better stability and accuracy through synchronous control; and the integrated array camera divides the focusing search area, and the imaging efficiency is greatly improved by synchronous division focusing search and image acquisition of a plurality of camera modules.
The technical scheme for realizing the aim of the invention is as follows: the integrated array camera comprises a main control unit and a plurality of camera modules, wherein the camera modules are used for picking up images of the same detection position of a piece to be detected; the camera module comprises an interface circuit board, an image sensor chip, a lens driving base with a motor and capable of being driven by the motor to perform focusing adjustment, and a lens; the image sensor chip is arranged on the interface circuit board; the lens driving base is arranged on the interface circuit board; the lens is arranged on the lens driving base and is subjected to telescopic focusing by the lens driving base; the lens is matched and electrically connected with the image sensor chip; the interface circuit boards of the camera modules are electrically connected with the main control unit; each camera module only carries out focusing search and image acquisition on a sub-level focusing search area divided from the focusing search area along the focus adjustment direction, and the sub-level focusing search areas corresponding to each camera module are combined to form a complete focusing search area; the main control unit is used for driving the motor to control the lenses of each camera module to perform focusing search at the same time and is used for controlling each image sensor chip to perform exposure and image acquisition at the same time through the corresponding lens.
Further, the focus search area is uniformly divided into a plurality of sub-level focus search areas along the focus adjustment direction; the number of the sub-level focusing search areas is consistent with the number of the camera modules; a camera module performs focus search and mapping for only one sub-level focus search area.
Further, the main control unit comprises a main control unit circuit board, and an image acquisition unit, an image signal processing unit, a data cache unit, a synchronous clock circuit unit, a lens motor driving unit and a data transmission interface are arranged on the main control unit circuit board; the interface circuit board is electrically connected with the main control unit circuit board through a connector;
the synchronous clock circuit unit is used for generating a synchronous main clock and a sampling control clock of each image sensor chip so as to realize the exposure and drawing of each image sensor chip at the same time through the corresponding lens;
the image acquisition unit is used for receiving the image acquisition information from each image sensor chip processed by the image signal processing unit and transmitting the image acquisition information to the data cache unit;
the data cache unit is used for transmitting the image acquisition information outwards through the data transmission interface;
the lens motor driving unit is used for driving a motor to control lens focusing.
Further, the image sensor chip is an image sensor CIS chip.
Further, the camera modules are arranged linearly or in a matrix; the photographing regions are uniformly divided according to the arrangement mode of the camera modules.
The second object of the present invention is to provide an imaging control method for realizing rapid imaging based on the integrated array camera.
The technical scheme for realizing the second object of the invention is as follows: the imaging control method by using the integrated array camera comprises the following steps:
s1, debugging equipment: setting exposure time of each image sensor CIS chip; dividing a focus search area into a plurality of sub-level focus search areas along a focus adjustment direction according to the number of camera modules; setting a sub-level focusing search area corresponding to the lens of each camera module, and setting an initial position of the lens of each camera module in the corresponding sub-level focusing search area and a focusing search completion position; setting a triggering device which is in communication connection with the main control unit and is used for triggering synchronous drawing; setting a light source in communication connection with the main control unit;
s2, the piece to be detected moves to a shooting position under the drive of a motion mechanism, and a trigger signal is formed when the piece to be detected moves to a trigger position; the main control unit is driven by the synchronous acquisition control signal of the synchronous clock circuit unit according to the trigger signal, and controls each lens to search the optimal focusing position in the corresponding sub-level focusing search area at the same time, and completes automatic focusing;
s3, the main control unit outputs synchronous exposure enabling signals of all the image sensor CIS chips, drives all the image sensor CIS chips to simultaneously expose, reads acquired exposure data to the main control unit, and performs preprocessing and data format conversion of the exposure data;
s4, transmitting the exposure data after the data format conversion to an upper computer through a data transmission interface for subsequent processing.
The step of driving the synchronous acquisition control signal of the synchronous clock circuit unit in the step S2 is as follows:
A. when the part to be detected moves to a trigger position under the drive of the movement mechanism, the trigger device outputs a trigger signal, and the trigger signal is acquired by the synchronous clock circuit unit of the main control unit and then generates a first synchronous pulse signal;
B. when the control signal of the light source is enabled, a light source trigger signal is output, and the light source trigger signal is acquired by the synchronous clock circuit unit of the main control unit and then generates a second synchronous pulse signal;
C. the main control unit forms synchronous trigger pulses through the first synchronous pulse signals and the second synchronous pulse signals, and triggers the CIS chips of all the image sensors to simultaneously control the corresponding lenses to perform automatic focusing in the corresponding sub-level focusing search areas;
in the step S3, the main control unit drives the CIS chips of each image sensor to perform exposure simultaneously through the synchronous trigger pulse.
In the step S2, each lens searches for the best focusing position by parallel searching auto-focusing algorithm; the steps of the parallel search autofocus algorithm are as follows:
a. the main control unit controls the lenses of each camera module to perform focusing search from the initial position to the position where the focusing search is completed in the corresponding sub-level focusing search area according to the trigger signal;
b. each sub-level focusing search area is divided into a plurality of focusing positions from an initial position to a position where focusing search is completed; each lens collects images at each focusing position when carrying out focusing search on the corresponding sub-level focusing search area;
c. invoking an image definition algorithm function to obtain the definition of each camera module at the current focusing position, and storing definition function curve data of each camera module;
d. after each camera module completes focusing search, calculating the maximum value of the definition function curve data of each camera module, and obtaining the optimal focusing position corresponding to each camera module according to the focusing position corresponding to the maximum value;
e. and according to the search completion result, the main control unit controls the lenses of the camera modules to be adjusted to the respective optimal focusing positions.
The invention has the positive effects that: (1) The invention integrates the camera module, controls the camera module and a main control unit in an array stacking mode, has simple overall layout, is beneficial to system deployment and adaptation of different scenes, and also increases imaging vision; meanwhile, the focusing search area is divided, and the camera modules only need to search and focus in a small range by synchronous division focusing search and image acquisition of the plurality of camera modules, so that the effect of quick automatic focusing is achieved, the imaging efficiency is greatly improved, and the shooting time is shortened.
(2) The invention can realize synchronous control and data acquisition of a plurality of camera modules through the synchronous clock circuit module, and has better stability and accuracy.
(3) The invention can ensure that each camera obtains a picture with optimal definition in a sub-level searching focusing area for background calculation processing while improving imaging speed by the parallel searching automatic focusing control method.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of an integrated array camera according to the present invention;
FIG. 2 is an exploded view of an integrated array camera according to the present invention;
FIG. 3 is a schematic diagram of circuit module connection of an integrated array camera according to the present invention;
FIG. 4 is a schematic diagram of a synchronous acquisition control signal driving of a synchronous clock circuit unit according to the present invention;
FIG. 5 is a flow chart of the parallel search autofocus algorithm according to the present invention;
FIG. 6 is a graph of sharpness function curve data according to the present invention;
FIG. 7 is a diagram of an external trigger interface circuit of the master control unit according to the present invention;
FIG. 8 is a driving circuit of a motor according to the present invention;
fig. 9 is a schematic diagram of a circuit connection established when the imaging control method of the present invention is performed.
Detailed Description
Referring to fig. 1 to 3, the integrated array camera of the present invention includes a main control unit 1 and a plurality of camera modules 2 for picking up images of the same detection position of a piece to be detected; the camera module 2 comprises an interface circuit board 21, an image sensor chip 22, a lens driving base 23 with a motor and capable of being driven by the motor to perform focusing adjustment, and a lens 24; the image sensor chip 22 is disposed on the interface circuit board 21; the lens driving base 23 is mounted on the interface circuit board 21; the lens 24 is arranged on the lens driving base 23 and is driven by a motor on the lens driving base 23 to perform telescopic focusing; the lens 24 is electrically connected with the image sensor chip 22 in a matching way; the interface circuit board 21 of each camera module 2 is electrically connected with the main control unit 1; each camera module 2 performs focus search and image acquisition on only one sub-level focus search area divided from the focus search area along the focus adjustment direction, and the sub-level focus search areas corresponding to each camera module 2 are combined to form a complete focus search area.
The focal length adjustment direction can be simply understood as the telescopic direction of the lens 24, and because the action of focusing search is to obtain the best focus at a certain position through the telescopic action of the lens 24, the complete focusing search area is the complete stroke range of the telescopic action of the lens of the single camera in the conventional single-camera focusing process. In the invention, the focus search area is divided into a corresponding number of sub-level focus search areas according to the number of the camera modules 2, so that the search stroke of the lens 24 is only the sub-level focus search area when one camera module 2 performs focus search; with the synchronous focus search of the plurality of camera modules 2, the complete focus search of the focus search area can be completed in a shorter time.
In order to maintain the synchronism, the focus search area is generally divided into a plurality of sub-level focus search areas uniformly in the focus adjustment direction according to the number of camera modules 2.
The main control unit 1 is used for driving a motor to control the lenses 24 of each camera module 2 to perform focusing search at the same time, and is used for controlling each image sensor chip 22 to perform exposure and image acquisition at the same time through the corresponding lens 24.
The main control unit 1 comprises a main control unit circuit board 11, wherein an image acquisition unit 12, an image signal processing unit 13, a data cache unit 14, a synchronous clock circuit unit 15, a lens motor driving unit 16 and a data transmission interface 17 are arranged on the main control unit circuit board 11; the interface circuit board 21 and the main control unit circuit board 11 are electrically connected through the connector 18;
the synchronous clock circuit unit 15 is configured to generate a synchronous master clock and a sampling control clock of each image sensor chip 22, so as to enable each image sensor chip 22 to be exposed and draw images at the same time through its corresponding lens 24;
the image acquisition unit 12 is configured to receive the image acquisition information from each image sensor chip 22 processed by the image signal processing unit 13, and transmit the image acquisition information to the data cache unit 14;
the data cache unit 14 is used for transmitting the image capturing information outwards through the data transmission interface 17;
the lens motor driving unit 16 is used for driving a motor to control focusing of the lens 24.
The image sensor chip 22 is an image sensor CIS chip.
The term "acquisition" means acquisition of pictures.
The camera modules 2 are arranged linearly or in a matrix; the photographing region is uniformly divided according to the arrangement of the camera modules 2. In this embodiment, a linear arrangement is used, and reference is made to fig. 1 and 2.
The imaging control method by using the integrated array camera comprises the following steps:
s1, debugging equipment: setting exposure time of each image sensor CIS chip; a plurality of sub-level focus search areas dividing the focus search area along the focus adjustment direction according to the number of the camera modules 2; setting a sub-level focus search area corresponding to the lens 24 of each camera module 2, and setting an initial position of the lens 24 of each camera module 2 in the corresponding sub-level focus search area and a focus search completion position; a triggering device which is in communication connection with the main control unit 1 and is used for triggering synchronous drawing is arranged; the light source in communication connection with the main control unit 1 is provided, and reference is specifically made to fig. 9;
s2, the piece to be detected moves to a shooting position under the drive of a motion mechanism, and a trigger signal is formed when the piece to be detected moves to a trigger position; the main control unit 1 controls each lens 24 to search the best focusing position in the corresponding sub-level focusing searching area at the same time under the driving of the synchronous acquisition control signal of the synchronous clock circuit unit 15 according to the trigger signal, and completes automatic focusing;
s3, the main control unit 1 outputs synchronous exposure enabling signals of all the image sensor CIS chips, drives all the image sensor CIS chips to simultaneously expose, reads out acquired exposure data to the main control unit 1, and performs preprocessing and data format conversion of the exposure data;
s4, transmitting the exposure data after the data format conversion to an upper computer through a data transmission interface 17 for subsequent processing.
The moving mechanism for driving the workpiece to be detected to reach the shooting position is many in industrial detection, such as a manipulator, a conveyor belt, etc., so the specific structure of the moving mechanism will not be described herein. At the same time, the triggering device for forming the triggering signal is also a common component in automated machines, such as a motion control card, a robot, etc. The light source is also quite common in industrial detection, and the model configuration and the like of the light source can be assembled according to actual needs, so that the specific setting mode and the specific model are not repeated here.
Meanwhile, in order to facilitate communication connection with the touch device, the main control unit 1 is provided with an external trigger interface circuit, and reference is made to fig. 7. And a driving circuit of a motor for driving lens focus adjustment may refer to fig. 8.
The step S2 of driving the synchronous acquisition control signal of the synchronous clock circuit unit 15 is as follows, and reference is made to fig. 4:
A. when the part to be detected moves to a trigger position under the drive of the movement mechanism, the trigger device outputs a trigger signal, and the trigger signal is acquired by the synchronous clock circuit unit 15 of the main control unit 1 and then generates a first synchronous pulse signal;
B. when the control signal of the light source is enabled, a light source trigger signal is output, and after the light source trigger signal is acquired by the synchronous clock circuit unit 15 of the main control unit 1, a second synchronous pulse signal is generated;
C. the main control unit 1 forms synchronous trigger pulses through the first synchronous pulse signals and the second synchronous pulse signals, and triggers all the image sensor CIS chips to simultaneously control the corresponding lenses 24 to perform automatic focusing in the corresponding sub-level focusing search areas;
in the step S3, the main control unit 1 drives the CIS chips of each image sensor to perform exposure simultaneously through the synchronous trigger pulse.
Wherein "Enable" refers to the input and output of control signals, and is a verb, english'. The english Enable, prefix en-is the meaning of "Enable", can be. Taken together is enabled. The enabling colloquial point is a "permission" signal, and the feeding enabling signal is a signal for permitting feeding, that is, the executing component (such as a light source and a movement mechanism in the invention) can not rotate until the feeding enabling signal is valid.
The method can obtain a plurality of groups of pictures with higher imaging speed and higher definition just by synchronously picking the pictures by the method. Because the conventional imaging shooting process of the existing industrial quality inspection is as follows: the integrated array camera or the part to be detected is driven by the motion mechanism to move to a certain shooting position, the camera module executes a shooting process after relevant imaging adjustment is carried out on the light source at the position, and then the camera module moves to the next position. It is for this reason that the overall imaging efficiency is to be improved.
In order to improve the speed and accuracy of the whole process, the main control unit 1 can utilize the trigger signals of all links to perform clock synchronization, so that accurate synchronous shooting is realized, and the maximum synchronization error is only one clock interval of the main control unit, which is generally a few nanoseconds.
In step S2, each lens 24 searches for the best focus position by a parallel search autofocus algorithm, which includes the following steps, referring to fig. 5:
a. the main control unit 1 controls the lenses 24 of each camera module 2 to perform focusing search from the initial position to the position where the focusing search is completed in the corresponding sub-level focusing search area according to the trigger signal;
b. each sub-level focusing search area is divided into a plurality of focusing positions from an initial position to a position where focusing search is completed; each lens 24 collects an image at each focus position when performing focus search on its corresponding sub-level focus search area;
c. invoking an image definition algorithm function to obtain the definition of each camera module 2 at the current focusing position, and storing definition function curve data of each camera module 2;
d. after each camera module 2 completes focusing search, calculating the maximum value of the definition function curve data of each camera module 2, and obtaining the optimal focusing position corresponding to each camera module 2 according to the focusing position corresponding to the maximum value;
e. based on the search completion result, the main control unit 1 controls the lenses 24 of the respective camera modules 2 to adjust to the respective best focus positions.
The sharpness function curve data corresponding to the camera module can refer to fig. 6.
The invention does not simply stack a plurality of camera modules 2, but modularizes the core components such as a main control unit, an image sensor CIS chip, an optical lens and the like in a general camera, and integrates at a control circuit level according to the framework of one main control unit corresponding to a plurality of image sensor CIS chips, and comprises an imaging control algorithm of a bottom layer, thereby achieving the performance advantages of synchronous acquisition shooting, rapid automatic focusing and the like which cannot be realized by simply stacking a plurality of cameras.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (8)
1. Integration array camera, its characterized in that: the device comprises a main control unit and a plurality of camera modules for picking up images of the same detection position of a piece to be detected; the camera module comprises an interface circuit board, an image sensor chip, a lens driving base with a motor and capable of being driven by the motor to perform focusing adjustment, and a lens; the image sensor chip is arranged on the interface circuit board; the lens driving base is arranged on the interface circuit board; the lens is arranged on the lens driving base and is driven by a motor on the lens driving base to perform telescopic focusing; the lens is matched and electrically connected with the image sensor chip; the interface circuit boards of the camera modules are electrically connected with the main control unit; each camera module only carries out focusing search and image acquisition on a sub-level focusing search area divided from the focusing search area along the focus adjustment direction, and the sub-level focusing search areas corresponding to each camera module are combined to form a complete focusing search area; the main control unit is used for driving the motor to control the lenses of each camera module to perform focusing search at the same time and is used for controlling each image sensor chip to perform exposure and image acquisition at the same time through the corresponding lens.
2. The integrated array camera of claim 1, wherein: the focusing search area is uniformly divided into a plurality of sub-level focusing search areas along the focus adjustment direction; the number of the sub-level focusing search areas is consistent with the number of the camera modules; a camera module performs focus search and mapping for only one sub-level focus search area.
3. The integrated array camera of claim 1, wherein: the main control unit comprises a main control unit circuit board, and an image acquisition unit, an image signal processing unit, a data cache unit, a synchronous clock circuit unit, a lens motor driving unit and a data transmission interface are arranged on the main control unit circuit board; the interface circuit board is electrically connected with the main control unit circuit board through a connector;
the synchronous clock circuit unit is used for generating a synchronous main clock and a sampling control clock of each image sensor chip so as to realize the exposure and drawing of each image sensor chip at the same time through the corresponding lens;
the image acquisition unit is used for receiving the image acquisition information from each image sensor chip processed by the image signal processing unit and transmitting the image acquisition information to the data cache unit;
the data cache unit is used for transmitting the image acquisition information outwards through the data transmission interface;
the lens motor driving unit is used for driving a motor to control lens focusing.
4. The integrated array camera of claim 1 or 2 or 3, wherein: the image sensor chip is an image sensor CIS chip.
5. The integrated array camera of claim 1, wherein: each camera module is arranged linearly or in a matrix; the photographing regions are uniformly divided according to the arrangement mode of the camera modules.
6. An imaging control method by using the integrated array camera of claim 4, characterized by comprising the steps of:
s1, debugging equipment: setting exposure time of each image sensor CIS chip; dividing a focus search area into a plurality of sub-level focus search areas along a focus adjustment direction according to the number of camera modules; setting a sub-level focusing search area corresponding to the lens of each camera module, and setting an initial position of the lens of each camera module in the corresponding sub-level focusing search area and a focusing search completion position; setting a triggering device which is in communication connection with the main control unit and is used for triggering synchronous drawing; setting a light source in communication connection with the main control unit;
s2, the piece to be detected moves to a shooting position under the drive of a motion mechanism, and a trigger signal is formed when the piece to be detected moves to a trigger position; the main control unit is driven by the synchronous acquisition control signal of the synchronous clock circuit unit according to the trigger signal, and controls each lens to search the optimal focusing position in the corresponding sub-level focusing search area at the same time, and completes automatic focusing;
s3, the main control unit outputs synchronous exposure enabling signals of all the image sensor CIS chips, drives all the image sensor CIS chips to simultaneously expose, reads acquired exposure data to the main control unit, and performs preprocessing and data format conversion of the exposure data;
s4, transmitting the exposure data after the data format conversion to an upper computer through a data transmission interface for subsequent processing.
7. The imaging control method by an integrated array camera according to claim 6, wherein: the step S2 of driving the synchronous acquisition control signal of the synchronous clock circuit unit comprises the following steps:
A. when the part to be detected moves to a trigger position under the drive of the movement mechanism, the trigger device outputs a trigger signal, and the trigger signal is acquired by the synchronous clock circuit unit of the main control unit and then generates a first synchronous pulse signal;
B. when the control signal of the light source is enabled, a light source trigger signal is output, and the light source trigger signal is acquired by the synchronous clock circuit unit of the main control unit and then generates a second synchronous pulse signal;
C. the main control unit forms synchronous trigger pulses through the first synchronous pulse signals and the second synchronous pulse signals, and triggers the CIS chips of all the image sensors to simultaneously control the corresponding lenses to perform automatic focusing in the corresponding sub-level focusing search areas;
in the step S3, the main control unit drives the CIS chips of each image sensor to perform exposure simultaneously through the synchronous trigger pulse.
8. The imaging control method by an integrated array camera according to claim 7, wherein: in the step S2, each lens searches for an optimal focusing position through a parallel searching autofocus algorithm; the steps of the parallel search autofocus algorithm are as follows:
a. the main control unit controls the lenses of each camera module to perform focusing search from the initial position to the position where the focusing search is completed in the corresponding sub-level focusing search area according to the trigger signal;
b. each sub-level focusing search area is divided into a plurality of focusing positions from an initial position to a position where focusing search is completed; each lens collects images at each focusing position when carrying out focusing search on the corresponding sub-level focusing search area;
c. invoking an image definition algorithm function to obtain the definition of each camera module at the current focusing position, and storing definition function curve data of each camera module;
d. after each camera module completes focusing search, calculating the maximum value of the definition function curve data of each camera module, and obtaining the optimal focusing position corresponding to each camera module according to the focusing position corresponding to the maximum value;
e. and according to the search completion result, the main control unit controls the lenses of the camera modules to be adjusted to the respective optimal focusing positions.
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| CN104767926A (en) * | 2014-01-07 | 2015-07-08 | 北京三星通信技术研究有限公司 | Automatic focusing method and device |
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| CN1937766A (en) * | 2005-09-20 | 2007-03-28 | 富士能株式会社 | Surveillance camera apparatus and surveillance camera system |
| US20130222626A1 (en) * | 2010-07-24 | 2013-08-29 | Ryan Kent Molde | Photographic machine comprising a camera system with exeptional 1,500mm-3000mm mega zoom capability with 3 distinct levels of magnification, image stabilization, accurate metering, and auto focus confirmation |
| CN103873849A (en) * | 2012-12-10 | 2014-06-18 | 联发科技股份有限公司 | Method and apparatus for multi-camera photoing apparatus |
| CN104767926A (en) * | 2014-01-07 | 2015-07-08 | 北京三星通信技术研究有限公司 | Automatic focusing method and device |
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