CN109842753B - Camera anti-shake system, camera anti-shake method, electronic device and storage medium - Google Patents
Camera anti-shake system, camera anti-shake method, electronic device and storage medium Download PDFInfo
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- CN109842753B CN109842753B CN201910231316.4A CN201910231316A CN109842753B CN 109842753 B CN109842753 B CN 109842753B CN 201910231316 A CN201910231316 A CN 201910231316A CN 109842753 B CN109842753 B CN 109842753B
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Abstract
The application relates to a camera anti-shake system, a camera anti-shake method, an electronic device and a computer-readable storage medium. The above-mentioned system includes: locate gyroscope and anti-shake drive chip on the mainboard, locate camera lens and motor in the camera module, the gyroscope is connected with anti-shake drive chip, anti-shake drive chip is connected with the motor, motor and camera lens are connected, the gyroscope can be used to gather the angular velocity information of camera lens, and send angular velocity information for anti-shake drive chip, anti-shake drive chip is used for calculating the shake compensation information of camera lens according to angular velocity information, and on the compensation information control motor of shaking, the motor is used for the removal of drive lens under anti-shake drive chip's control. The shake compensation information is calculated by the anti-shake driving chip arranged on the main board according to the acceleration information collected by the gyroscope, and the movement of the electric driving lens on the motor is controlled according to the shake compensation information, so that the problem that the camera is too large in volume when the anti-shake driving chip is arranged in the camera is avoided, and the reliability of the camera module is improved.
Description
Technical Field
The present disclosure relates to the field of image technologies, and in particular, to a camera anti-shake system, a camera anti-shake method, an electronic device, and a computer-readable storage medium.
Background
With the rapid development of the imaging technology, people have higher and higher requirements on the imaging quality of the camera. When people use the camera to shoot, the camera is easy to shake, so that the shot image has the problems of blurring and unsharpness. At present, the camera can weaken the influence of camera shake on the imaging definition through technologies such as optical anti-shake, electronic anti-shake and photoreceptor anti-shake. However, the conventional method has a problem of low camera reliability.
Disclosure of Invention
The embodiment of the application provides a camera anti-shake system, a camera anti-shake method, electronic equipment and a computer-readable storage medium, and the reliability of a camera module can be improved.
A camera anti-shake system, the system comprising: the gyroscope and the anti-shake driving chip are arranged on the main board; the lens and the motor are arranged in the camera module; the gyroscope is connected with the anti-shake driving chip, the anti-shake driving chip is connected with the motor, and the motor is connected with the lens;
the gyroscope is used for acquiring angular velocity information of the lens and sending the angular velocity information to the anti-shake driving chip;
the anti-shake driving chip is used for calculating shake compensation information of the lens according to the angular velocity information and controlling the motor to be powered on according to the shake compensation information;
the motor is used for driving the lens to move under the control of the anti-shake driving chip.
A camera anti-shake method is applied to electronic equipment, and the electronic equipment comprises: the gyroscope and the anti-shake driving chip are arranged on the main board; the lens and the motor are arranged in the camera module; the gyroscope is connected with the anti-shake driving chip, the anti-shake driving chip is connected with the motor, and the motor is connected with the lens; the method comprises the following steps:
acquiring angular velocity information of the lens through the gyroscope, and sending the angular velocity information to the anti-shake driving chip;
calculating shake compensation information of the lens according to the angular velocity information through the anti-shake driving chip, and controlling the motor to be powered on according to the shake compensation information;
and driving the lens to move under the control of the anti-shake driving chip through the motor.
An electronic device comprising a camera anti-shake system, the camera anti-shake system comprising: the gyroscope and the anti-shake driving chip are arranged on the main board; the lens and the motor are arranged in the camera module; the gyroscope is connected with the anti-shake driving chip, the anti-shake driving chip is connected with the motor, and the motor is connected with the lens;
the gyroscope is used for acquiring angular velocity information of the lens and sending the angular velocity information to the anti-shake driving chip;
the anti-shake driving chip is used for calculating shake compensation information of the lens according to the angular velocity information and controlling the motor to be powered on according to the shake compensation information;
the motor is used for driving the lens to move under the control of the anti-shake driving chip.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of:
acquiring angular velocity information of the lens through the gyroscope, and sending the angular velocity information to the anti-shake driving chip;
calculating shake compensation information of the lens according to the angular velocity information through the anti-shake driving chip, and controlling the motor to be powered on according to the shake compensation information;
and driving the lens to move under the control of the anti-shake driving chip through the motor.
According to the camera anti-shake system, the camera anti-shake method, the electronic equipment and the computer readable storage medium, the angular velocity information of the lens can be collected through the gyroscope, the angular velocity information is sent to the anti-shake driving chip arranged on the main board, the anti-shake driving chip calculates shake compensation information of the lens according to the angular velocity information, the motor is controlled to be powered on according to the shake compensation information, and the motor drives the lens to move under the control of the anti-shake driving chip. The anti-shake driving chip arranged on the main board calculates shake compensation information according to acceleration information collected by the gyroscope, and the anti-shake driving chip is prevented from being arranged in the camera to cause the problem that the size of the camera is too large and the reliability is influenced according to the movement of the electric driving lens on the shake compensation information control motor, so that the reliability of the camera module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a camera anti-shake system in one embodiment;
fig. 2 is a schematic structural diagram of a camera anti-shake system in another embodiment;
FIG. 3 is a schematic structural diagram of a camera anti-shake system in yet another embodiment;
FIG. 4 is a schematic structural diagram of a camera anti-shake system in one embodiment;
FIG. 5 is a flowchart of a camera anti-shake method in one embodiment;
FIG. 6 is a schematic diagram of an image processing circuit in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first chip may be referred to as a second chip, and similarly, a second chip may be referred to as a first chip, without departing from the scope of the present application. The first chip and the second chip are both chips, but they are not the same chip.
Fig. 1 is a schematic structural diagram of a camera anti-shake system in one embodiment. As shown in fig. 1, the camera anti-shake system includes a gyroscope 112 and an anti-shake driving chip 114 disposed on a main board 110, and a motor 122 and a lens 124 disposed on a camera module 120. The gyroscope 112 is connected to the anti-shake driving chip 114, the anti-shake driving chip 114 is connected to the motor 122, and the motor 122 is connected to the lens 124.
And the gyroscope 112 is used for acquiring the angular velocity information of the lens 124 and sending the angular velocity information to the anti-shake driving chip 114.
The gyroscope 112 is any angular motion detection device that can be used to detect angular velocity. In the process of shooting an image by the camera, if the camera shakes or moves, the imaging definition is affected, so that the collected image is blurred. The gyroscope 112 may detect whether the lens 124 shakes, acquire angular velocity information of the lens 124 when the lens 124 shakes, and transmit the angular velocity information to the anti-shake driving chip 114.
And the anti-shake driving chip 114 is used for calculating shake compensation information of the lens according to the angular velocity information and controlling the motor to be powered on according to the shake compensation information.
The anti-shake driving chip 114 is pre-stored with a shake compensation algorithm, and can process the angular velocity information collected by the gyroscope. The shake compensation information includes a compensation amount of the lens in at least one direction. The anti-shake driving chip 114 controls the motor 122 to be powered up according to the shake compensation information, and then drives the lens 124 to move through the motor 122, wherein the direction of movement of the lens 124 is opposite to the direction of shake, so as to eliminate lens shift caused by shake. Specifically, the shake compensation information may be determined according to the position of any point on the plane where the lens is located, such as according to the center of the lens, or according to other points on the lens. For example, if the position of the optical center of the lens when the camera module is stationary is the first position, and the second position is the position of the optical center of the lens after the lens is driven by the motor to move, that is, the shake compensation information includes the vector distance between the first position and the second position.
The anti-shake driving chip 114 may calculate shake compensation information of the lens 124 according to the angular velocity information each time angular velocity information sent by the gyroscope 112 is received, and control the motor 122 to be powered on according to the shake compensation information.
And a motor 122 for driving the movement of the lens 124 under the control of the anti-shake driving chip 114.
The lens 124 may not be limited to various fixed focus lenses, zoom lenses, wide-angle lenses, standard lenses, and the like. The motor 122 may be a voice coil motor. The motor 122 may drive the movement of the lens 124 under the control of the anti-shake driving chip 114. Specifically, the anti-shake driving chip 114 may control the current magnitude of the motor 122 according to the compensation amount included in the shake compensation information to control the distance that the motor 122 drives the lens 124 to move. Generally, the larger the current, the larger the distance the motor drives the lens, within the same time frame; the smaller the current, the smaller the distance the motor drives the lens.
The camera anti-shake system that this application embodiment provided places anti-shake drive chip on the mainboard, place motor and camera lens in the camera module, calculate shake compensation information by the acceleration information that anti-shake drive chip who places in the mainboard gathered according to the gyroscope, according to the removal of shake compensation information control electric drive camera lens on the motor, can avoid placing anti-shake drive chip in the camera and lead to the camera bulky, influence the problem of reliability, improve the reliability of camera module.
Alternatively, in one embodiment, the anti-shake driving chip 114 may calculate the anti-shake compensation information of the lens by fitting a model. Specifically, the anti-shake driving chip 114 may preset reference fitting models corresponding to different lenses, bring the angular velocity information of the lenses and the corresponding shake compensation information into the reference fitting models, obtain fitting parameters of the reference fitting models, and establish target fitting models corresponding to the lenses according to the obtained fitting parameters.
For example, the reference fitting model may be expressed as
Wherein x represents angular velocity information collected by a gyroscope, y (x, w) represents shake compensation information of a lens, and wjJ may be any natural number, and is not limited herein. The anti-shake driving chip 114 may bring the angular velocity information of the lens and the corresponding shake compensation information into the reference fitting model, so as to obtain the constant w in the reference fitting modeljAnd substituting the constant into the reference fitting model to obtain a target fitting model corresponding to the lens. The anti-shake driving chip 114 may calculate shake compensation information of the lens 124 by combining the target fitting model with the angular velocity information collected by the gyroscope 112, so as to improve accuracy of the shake compensation information.
Fig. 2 is a schematic structural diagram of a camera anti-shake system in another embodiment. As shown in fig. 2, in one embodiment, the camera anti-shake system provided includes a gyroscope 212 and an anti-shake driving chip 214 provided on a main board 210, and a motor 222, a lens 224, and a hall sensor 226 provided on a camera module. As shown in fig. 2, the gyroscope 212, the anti-shake driving chip 214, the motor 222, and the lens 224 are sequentially connected, and the hall sensor 226 is connected to the anti-shake driving chip 214. The gyroscope 212 and the anti-shake driver chip 214 may be connected through an SPI (Serial Peripheral Interface).
And a hall sensor 226 for detecting the current position information of the lens 224 and transmitting the position information to the anti-shake driving chip 214. The anti-shake driving chip 214 is further configured to control the motor 222 to be powered on based on the position information and the shake compensation information, so that the motor 222 drives the lens 224 to move.
Hall sensors (Hall sensors) are magnetic field sensors made according to the Hall effect, which is essentially the deflection of moving charged particles in a magnetic field caused by the action of lorentz forces. When charged particles (electrons or holes) are confined in a solid material, this deflection causes an accumulation of positive and negative charges in the direction of the perpendicular current and magnetic field, thereby creating an additional transverse electric field. The position information of the lens refers to the position of the lens in the camera anti-shake system. The offset of the lens from the initial position can be determined from the position information of the lens. The initial position is the position of the lens when the camera anti-shake system is in a static state. Specifically, a coordinate system may be established for a plane where the lens is located, for example, the coordinate system may be established with a center of the initial position as an origin, so as to determine coordinates of the lens in the coordinate system according to hall values output by the hall sensors, that is, to determine position information of the lens. The plane where the lens is located generally refers to a plane where the lens is located and is parallel to the image sensor corresponding to the lens.
The anti-shake driving chip 214 controls the motor 222 to be powered on based on the position information and the shake compensation information. Specifically, the position information is an offset of the current lens from the initial position, and the shake compensation information is shake compensation amounts of the lens in different directions, so that the anti-shake driving chip 214 may determine a required offset of the lens according to the position information and the shake compensation information, where the required offset is a distance that the lens needs to move to reduce a deviation caused by shake. For example, an XY axis coordinate system is established with the center of the initial position of the lens 224 as the origin, when the current position information of the lens 224 is (+5, -12), the shake compensation information calculated by the anti-shake driving chip 214 includes a shake compensation amount of +2 in the X axis, and a shake compensation amount of-5 in the Y axis, the anti-shake driving chip 214 determines that the required offset of the lens is-3 in the X axis direction and +7 in the Y axis direction, and then the anti-shake driving chip 214 controls the motor 222 to be powered on according to the required offset, so that the motor 222 drives the lens 224 to move 3 unit lengths in the X axis negative direction and 7 unit lengths in the Y axis positive direction. In camera anti-shake systems, the lens shift data level is on the order of microns. Alternatively, the position information may also be represented by a position vector, i.e. the position information may comprise a direction and an amount of shift of the lens relative to the initial position. Similarly, the jitter compensation information and the required offset may also be represented by vectors.
Further, in an embodiment, as shown in fig. 2, a main control chip 216 connected to the hall sensor 226 is further disposed on the main board 210 of the camera anti-shake system.
The hall sensor 226 may also be configured to acquire position offset information of the lens 224 when acquiring an image, and send the position offset information to the main control chip 216, and the main control chip 216 is configured to determine image offset information of the image based on the position offset information, and compensate the image according to the image offset information.
The positional shift information refers to shift information between a position where the lens is located when an image is captured by the lens and an initial position. Specifically, the positional shift information includes a vector distance between optical centers before and after the lens movement. The main control chip 216 may obtain a first image collected by the lens at an initial position in advance, and record a coordinate position of each pixel point of the first image. When the lens shakes, the coordinate positions of the second image collected by the moved lens relative to each pixel point in the first image are offset, and the offset of the second image relative to the first image is called image offset. Alternatively, the main control chip 216 may determine the image offset information of the image by presetting an offset conversion function when the position offset information is acquired. The preset offset conversion function may be obtained according to a specific calibration manner, and the preset offset conversion function may be used to convert the position offset information of the lens into image offset information. The offset of the lens in different directions can be brought into corresponding variables in a preset offset conversion function, and corresponding image offset is obtained through calculation.
The main control chip 216 compensates the image according to the image offset information. For example, if the calculated image shift information is shifted by 1 pixel, the image can be compensated by shifting the negative direction of the image shift by 1 pixel in the image compensation. Further, the frequency of the image collected by the camera is different from the frequency of the position offset information output by the Hall sensor. For example, if the image acquisition is performed at 30Hz and the hall sensor detects the shift information of the lens at 200Hz at the same time, one image will shift the corresponding 6-7 positions in time sequence. The main control chip 216 may compensate the same frame of image with the image offset information corresponding to the plurality of position offset information. For example, the image acquired by the camera module is an image obtained by line-by-line scanning using a CMOS (Complementary Metal Oxide Semiconductor), so that image compensation can be performed corresponding to the regions of different numbers of lines according to the position offset information.
The position offset information of the lens when the image is collected is obtained through the Hall sensor and is sent to the main control chip, the image is compensated through the main control chip according to the image offset image, the image offset can be accurately obtained, then the image is subjected to shake compensation, and the definition of the image can be improved.
In one embodiment, the anti-shake driving chip 214 in the camera anti-shake system may include a first sub-anti-shake driving chip and a second sub-anti-shake driving chip, wherein the first sub-anti-shake driving chip is configured to calculate first compensation information according to angular velocity information detected by a gyroscope and control the motor 222 to be powered on according to the first compensation information, so that the motor 222 drives the lens 224 to move in a first direction, and the second sub-anti-shake driving chip is configured to calculate second compensation information according to the angular velocity information and control the motor 222 to be powered on according to the second compensation information, so that the motor 222 drives the lens 224 to move in a second direction.
The first sub anti-shake driver chip and the second sub anti-shake driver chip are disposed at different positions of the main board 210. The volumes of the first sub anti-shake driving chip and the second sub anti-shake driving chip are smaller than that of the anti-shake driving chip. For example, when the camera anti-shake system establishes an XY coordinate system with a plane of the lens, the first direction may be an X-axis direction, and the second direction may be a Y-axis direction. The first sub anti-shake driving chip may control the motor 222 to be powered on according to the first compensation information calculated by the angular velocity information, so that the motor 222 drives the lens 224 to move in the first direction, and the second sub anti-shake driving chip may control the motor 222 to be powered on according to the second compensation information calculated by the angular velocity information, so that the motor 222 drives the lens 224 to move in the second direction.
Further, the motor 222 includes a first coil connected to the first sub anti-shake driving chip and a second coil connected to the second sub anti-shake driving chip. The first coil is used for driving the lens 224 to move in a first direction under the control of the first sub anti-shake driving chip, and the second coil is used for driving the lens 224 to move in a second direction under the control of the second sub anti-shake driving chip.
When only containing an anti-shake driver chip in camera anti-shake system, anti-shake driver chip usually protrusion sets up in the camera module, and anti-shake driver chip is unstable because the condition such as collision of system easily this moment, and this application embodiment can avoid anti-shake driver chip protrusion in the problem that the reliability that the camera module leads to is low through setting up two sub-anti-shake driver chips on the mainboard, improves the reliability of camera module.
In an embodiment, the main control chip in the camera anti-shake system may be configured to determine, when a start instruction of a lens is received, a corresponding anti-shake driver chip based on a lens identifier included in the start instruction, and send the start instruction to the corresponding anti-shake driver chip; the anti-shake driving chip is further used for sending an angular velocity obtaining instruction to the gyroscope based on the starting instruction, and the gyroscope is used for sending the angular velocity to the anti-shake driving chip according to the angular velocity obtaining instruction.
The camera anti-shake system can comprise at least one anti-shake driving chip. For example, the camera anti-shake system may include an anti-shake driving chip and at least one camera module, where the anti-shake driving chip may control each camera module to include a motor, so that the motor controls movement of the lens; the camera anti-shake system can also comprise an anti-shake driving chip corresponding to each camera module, and the anti-shake driving chip can control the motor corresponding to the camera module according to shake compensation information so as to drive the motor to move the corresponding lens.
The start instruction may be generated by a user pressing a button of the electronic device including the camera anti-shake system, or may be generated by clicking a control on a touch screen of the electronic device. The main control chip can receive a starting instruction triggered by the lens. The starting instruction comprises a shot identification corresponding to the shot needing to be started. The lens identification is the only identification of the lens in the camera anti-shake system or the electronic equipment comprising the camera anti-shake system. The main control chip can send the starting instruction to the corresponding anti-shake drive chip according to the anti-shake drive chip corresponding to the lens identification contained in the starting instruction, the anti-shake drive chip can send an angular velocity acquisition instruction to the gyroscope according to the starting instruction, and the gyroscope can send angular velocity information to the anti-shake drive chip according to the angular velocity acquisition instruction. Alternatively, the angular speed output frequency of the gyroscope may be preset by the main control chip.
In an embodiment, the anti-shake driving chip in the camera anti-shake system is further configured to determine corresponding target attribute data according to the lens identifier, generate an angular velocity obtaining instruction according to the target attribute data, send the angular velocity obtaining instruction to the gyroscope, configure the gyroscope according to the target attribute data included in the angular velocity obtaining instruction, collect original angular velocity information of the lens, generate target angular velocity information corresponding to the target attribute data according to the original angular velocity information, and send the target angular velocity information to the anti-shake driving chip.
The attribute data is an attribute of angular velocity information output from the gyroscope. The attribute data may be, but is not limited to, an output frequency of the angular velocity information, a bandwidth of the angular velocity information, a measurement range of the angular velocity information, and the like. The camera anti-shake system can pre-store the angular speed information attribute data corresponding to different lenses according to actual application requirements. Therefore, the anti-shake driving chip can determine target attribute data corresponding to the lens according to the lens identifier contained in the starting instruction after receiving the starting instruction, generate an angular velocity obtaining instruction according to the target attribute data, and send the angular velocity obtaining instruction to the gyroscope.
The gyroscope is configured according to the target attribute data, specifically, the gyroscope can configure a register of the gyroscope according to the target attribute data, and the register contains a storage address corresponding to an output interface of the gyroscope. The gyroscope may also be configured to acquire original angular velocity information of the lens 118 and generate angular velocity information corresponding to the target attribute data according to the original angular velocity information. For example, when the frequency of the original angular velocity information collected by the gyroscope is 3KHz and the measurement range is 0 to 20rad/s, if the output frequency in the target attribute data is 2KHz and the measurement range is 0 to 6rad/s, the gyroscope configures a register of the gyroscope according to the target attribute data, the output frequency of the target angular velocity information generated according to the original angular velocity information is 2KHz and the range of the angular velocity information is 0 to 6rad/s, the gyroscope can store the target angular velocity information in an address corresponding to an output interface in the register, and by reading the address, the gyroscope can output the target angular velocity information to the anti-shake driving chip.
By setting attribute data corresponding to different lenses and generating an angular velocity acquisition instruction according to target attribute data corresponding to the started lens, the anti-shake driving chip can obtain target angular velocity information corresponding to the target attribute data to calculate shake compensation information of the lens, the requirements on the angular velocity information of different lenses during anti-shake can be met, and the accuracy of the angular velocity information is improved.
Further, in an embodiment, the anti-shake driving chip may be further configured to obtain a starting time included in the starting instruction, and when the starting time is within a preset time period, generate an angular velocity obtaining instruction with a preset frequency, and send the angular velocity obtaining instruction to the gyroscope; the gyroscope is also used for sending the angular speed information to the corresponding anti-shake driving chip at the preset frequency.
The starting time is the time when the main control chip receives the starting instruction. The preset time period and the preset frequency may be set according to the actual application requirement, and are not limited herein. Specifically, the preset time period is determined according to the influence degree of the lens shake on the image definition in different time periods. The anti-shake driving chip can preset angular speed output frequency adjustment rules corresponding to different preset time periods, so that when a starting instruction of the camera is received, when the starting moment of the starting instruction is determined to be within the preset time period, the angular speed output frequency is adjusted according to the preset angular speed frequency adjustment rules, an angular speed acquisition instruction is generated according to target attribute data containing the adjusted angular speed output frequency, and the angular speed acquisition instruction is sent to the gyroscope, so that the gyroscope can send angular speed information to the corresponding anti-shake driving chip according to the angular speed acquisition instruction and the adjusted output frequency. For example, when the influence of lens shake on image sharpness is large when taking a picture at night, the preset time period may be from 7 pm to 5 am, and the corresponding adjustment rule may be to increase the angular speed output frequency by 200Hz, 500Hz, 800Hz, 1200Hz, or the like, but is not limited thereto.
The main control chip arranged on the main board determines the corresponding anti-shake driving chip according to the lens identification contained in the starting instruction, and sends the starting instruction to the anti-shake driving chip, and the anti-shake driving chip generates an angular speed acquisition instruction with preset frequency in a preset time period at the starting moment contained in the starting instruction, so that the gyroscope sends the angular speed information to the anti-shake driving chip with the preset frequency. Therefore, different angular speed acquisition frequencies are adopted for different time periods, a larger angular speed output frequency can be adopted in the time period with larger influence of lens shake on image definition, so that the adjustment frequency of the lens position is improved, a smaller angular speed output frequency can be adopted in the time period with smaller influence of lens shake on image definition, and the power consumption can be reduced while the image quality is ensured.
Taking the case that the camera anti-shake system includes two camera modules as an example, as shown in fig. 3, the camera anti-shake system may include a first camera module 320 and a second camera module 330; the first camera module 320 includes a first motor 322, and a first lens 324 connected to the first motor 322; the second camera module 330 includes a second motor 332, a second lens 334 connected to the second motor 332; the camera anti-shake system further comprises a main board 310, wherein a first anti-shake drive chip 311, a second anti-shake drive chip 313, a gyroscope 312 and a main control chip 316 are arranged on the main board 310; the gyroscope 312 is connected to the first anti-shake driving chip 311 and the second anti-shake driving chip 313, and the main control chip 316 is connected to the first anti-shake driving chip 311 and the second anti-shake driving chip 313.
The main control chip 316 may receive a start instruction for the first lens 324 or the second lens 334, for example, when the main control chip 316 receives the start instruction for the second lens 334, the main control chip 316 may determine that the corresponding anti-shake driver chip is the second anti-shake driver chip 313 according to a lens identifier included in the start instruction, and send the start instruction to the second anti-shake driver chip 313, the second anti-shake driver chip 313 may send an angular velocity obtaining instruction to the gyroscope 312 based on the start instruction, and the gyroscope 312 may send acceleration information to the second anti-shake driver chip 313 according to the angular velocity obtaining instruction. Optionally, the second anti-shake driver chip 313 may determine whether the start time included in the start instruction is within a preset time period, and when it is determined that the start time is within the preset time period, generate an angular velocity obtaining instruction with a preset frequency, and send the angular velocity obtaining instruction to the gyroscope 312, so that the gyroscope 312 may send the angular velocity information to the second anti-shake driver chip 313 with the preset frequency according to the angular velocity obtaining instruction.
Fig. 4 is a schematic structural diagram of a camera anti-shake system in one embodiment. As shown in fig. 4, in one embodiment, the camera anti-shake system includes a gyroscope 412, a processing unit 418 and an anti-shake driving chip 414 disposed on a main board 410, and a motor 422 and a lens 424 disposed on a camera module 420. The gyroscope 412 is connected to the processing unit 418 through the serial peripheral interface SPI, and the processing unit 418 is connected to the anti-shake driver chip 414 through an Inter-Integrated Circuit (IIC) bus.
And the gyroscope 412 is configured to collect angular velocity information of lenses in the camera module, and send the angular velocity information to the processing unit 418. And a processing unit 418 for calculating shake compensation information of the lens according to the angular velocity information and transmitting the shake compensation information to the anti-shake driving chip 414. The anti-shake driving chip 414 is configured to control the motor 422 to be powered up according to the shake compensation information, so that the motor 422 drives the lens 424 to move.
The processing Unit 418 may be a microprocessor such as an MCU (micro controller Unit), a CPU (Digital Signal Processor), or the like. The processing unit 418 is pre-stored with a shake compensation algorithm, and shake compensation information of the lens can be calculated according to the shake compensation algorithm and angular velocity information collected by the gyroscope. The jitter compensation algorithm pre-stored in the processing unit 418 can be updated according to the actual application requirement. Further, the processing unit 418 may also pre-store the shake compensation algorithms corresponding to different lenses, and then select the corresponding shake compensation algorithm according to the started lens to calculate the shake compensation information of the lens.
In the embodiment of the application, the anti-shake driving chip can be placed on the main board, the size of the camera module is reduced, the reliability of an anti-shake system can be improved, the anti-shake compensation information of the lens is further calculated through the processing unit according to the angular velocity information, and then is sent to the anti-shake driving chip to control the motor, the anti-shake driving chip does not need the built-in processing module to calculate the shake compensation information, and the processing unit can update the shake compensation algorithm according to the requirement, so that the shake compensation algorithm has maintainability.
Further, the camera anti-shake system further includes a hall sensor 426 disposed on the camera module 420 and connected to the anti-shake driver chip 414. And a hall sensor 426 for detecting current position information of the lens 424 and transmitting the position information to the anti-shake driving chip 414. The anti-shake driving chip 414 is further configured to control the motor 422 to be powered on based on the position information and the shake compensation information, so that the motor 422 drives the lens 424 to move.
Further, the camera anti-shake system may further include a main control chip 416 disposed on the main board 410 and an image sensor 428 disposed on the camera module 420, where the main control chip 416 and the image sensor 428 are connected through a connection control interface CCI. The main control chip 416 may control the image sensor 428 to be powered on through the CCI interface when receiving the image capturing instruction, so that the image sensor 428 captures an image based on the moved lens 424, and the sharpness of the image may be improved.
Fig. 5 is a flowchart of a camera anti-shake method in an embodiment. As shown in fig. 5, in an embodiment, a camera shake prevention method is provided, where the method is applied to an electronic device, the electronic device includes a gyroscope and an anti-shake driver chip that are disposed on a main board, and a lens and a motor that are disposed on a camera module, and the gyroscope, the anti-shake driver chip, the motor, and the lens are sequentially connected, and the method includes:
and 502, acquiring angular speed information of the lens through the gyroscope, and sending the angular speed information to the anti-shake driving chip.
And step 504, calculating shake compensation information of the lens according to the angular velocity information through the anti-shake driving chip, and controlling the motor to be powered on according to the shake compensation information.
And step 506, driving the lens to move under the control of the anti-shake driving chip through a motor.
The camera anti-shake method provided by the embodiment of the application can calculate shake compensation information according to angular velocity information collected by a gyroscope through an anti-shake driving chip located on a main board, and control a motor located on a camera module according to the shake compensation information, so that the motor drives a lens to move, poor image definition caused by lens shake and collection can be avoided, the anti-shake driving chip is arranged on the main board, the problem that the module is too large in size and low in reliability when the chip is placed on the camera module is avoided, and the reliability of the camera module can be improved.
In one embodiment, the camera module of the electronic device further includes a hall sensor connected to the anti-shake driving chip, and the camera anti-shake method includes calculating shake compensation information of the lens according to the angular velocity information by the anti-shake driving chip, and controlling the motor to be powered on according to the shake compensation information, further including: detecting current position information of the lens through a Hall sensor, and sending the position information to an anti-shake driving chip; the anti-shake driving chip is also used for controlling the motor to be powered on based on the position information and the shake compensation information.
In one embodiment, the main board of the electronic device is further provided with a main control chip connected with the hall sensor, and the method further comprises: acquiring position offset information of the lens during image acquisition through a Hall sensor, and sending the position offset information to a main control chip; and determining image offset information of the image based on the position offset information through the main control chip, and compensating the image according to the image offset information.
In one embodiment, the camera anti-shake method further includes: when a lens starting instruction is received through the main control chip, determining a corresponding anti-shake drive chip based on a lens identifier contained in the starting instruction, and sending the starting instruction to the anti-shake drive chip; sending an angular velocity acquisition instruction to the gyroscope through the anti-shake driving chip based on the starting instruction; and sending the angular speed information to the anti-shake driving chip through the gyroscope according to the angular speed acquisition instruction.
In one embodiment, the camera anti-shake method further includes: determining corresponding target attribute data according to the lens identification through the anti-shake driving chip, generating an angular velocity acquisition instruction according to the target attribute data, and sending the angular velocity acquisition instruction to the gyroscope; and configuring the gyroscope according to target attribute data contained in the angular speed acquisition instruction through the gyroscope, acquiring original angular speed information of the lens, generating target angular speed information corresponding to the target attribute data according to the original angular speed information, and sending the target angular speed information to the anti-shake driving chip.
In one embodiment, the camera anti-shake method further includes: the anti-shake driving chip is further used for obtaining the starting time contained in the starting instruction, and when the starting time is within a preset time period, the angular speed output frequency contained in the target attribute data is adjusted.
In one embodiment, the anti-shake driving chip includes a first sub anti-shake driving chip and a second sub anti-shake driving chip, the camera anti-shake and anti-shake driving chip calculates shake compensation information of the lens according to the angular velocity information, and the process of controlling the motor to be powered on according to the shake compensation information includes: calculating first compensation information corresponding to the first direction according to the angular speed information through the first sub anti-shake driving chip, and controlling the motor to be powered on according to the first compensation information so as to enable the motor shake lens to move in the first direction; and calculating second compensation information corresponding to the second direction according to the angular speed information through the second sub anti-shake driving chip, and controlling the motor to be powered on according to the second compensation information so as to enable the motor shake lens to move in the second direction.
It should be understood that, although the steps in the flowchart of fig. 5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The embodiment of the application also provides electronic equipment which comprises the camera anti-shake system.
The embodiment of the application also provides the electronic equipment. The electronic device includes therein an Image Processing circuit, which may be implemented using hardware and/or software components, and may include various Processing units defining an ISP (Image Signal Processing) pipeline. FIG. 6 is a schematic diagram of an image processing circuit in one embodiment. As shown in fig. 6, for convenience of explanation, only aspects of the image processing technology related to the embodiments of the present application are shown.
As shown in fig. 6, the image processing circuit includes an ISP processor 640 and control logic 650. The image data captured by the imaging device 610 is first processed by the ISP processor 640, and the ISP processor 640 analyzes the image data to capture image statistics that may be used to determine and/or control one or more parameters of the imaging device 610. The imaging device 610 may include a camera having one or more lenses 612 and an image sensor 614. Image sensor 614 may include an array of color filters (e.g., Bayer filters), and image sensor 614 may acquire light intensity and wavelength information captured with each imaging pixel of image sensor 614 and provide a set of raw image data that may be processed by ISP processor 640. The sensor 620 (e.g., gyroscope) may provide parameters of the acquired image processing (e.g., anti-shake parameters) to the ISP processor 640 based on the type of interface of the sensor 620. The sensor 620 interface may utilize a SMIA (Standard Mobile Imaging Architecture) interface, other serial or parallel camera interfaces, or a combination of the above.
In addition, the image sensor 614 may also send raw image data to the sensor 620, the sensor 620 may provide the raw image data to the ISP processor 640 based on the sensor 620 interface type, or the sensor 620 may store the raw image data in the image memory 630.
The ISP processor 640 processes the raw image data pixel by pixel in a variety of formats. For example, each image pixel may have a bit depth of 8, 10, 12, or 14 bits, and the ISP processor 640 may perform one or more image processing operations on the raw image data, gathering statistical information about the image data. Wherein the image processing operations may be performed with the same or different bit depth precision.
The ISP processor 640 may also receive image data from the image memory 630. For example, the sensor 620 interface sends raw image data to the image memory 630, and the raw image data in the image memory 630 is then provided to the ISP processor 640 for processing. The image Memory 630 may be a part of a Memory device, a storage device, or a separate dedicated Memory within an electronic device, and may include a DMA (Direct Memory Access) feature.
Upon receiving raw image data from the image sensor 614 interface or from the sensor 620 interface or from the image memory 630, the ISP processor 640 may perform one or more image processing operations, such as temporal filtering. The processed image data may be sent to image memory 630 for additional processing before being displayed. ISP processor 640 receives processed data from image memory 630 and performs image data processing on the processed data in the raw domain and in the RGB and YCbCr color spaces. The image data processed by ISP processor 640 may be output to display 670 for viewing by a user and/or further processed by a Graphics Processing Unit (GPU). Further, the output of the ISP processor 640 may also be sent to the image memory 630, and the display 670 may read image data from the image memory 630. In one embodiment, image memory 630 may be configured to implement one or more frame buffers. In addition, the output of the ISP processor 640 may be transmitted to an encoder/decoder 660 for encoding/decoding image data. The encoded image data may be saved and decompressed before being displayed on the display 670 device. The encoder/decoder 660 may be implemented by a CPU or GPU or co-processor.
The statistical data determined by the ISP processor 640 may be transmitted to the control logic 650 unit. For example, the statistical data may include image sensor 614 statistics such as auto-exposure, auto-white balance, auto-focus, flicker detection, black level compensation, lens 612 shading correction, and the like. The control logic 650 may include a processor and/or microcontroller that executes one or more routines (e.g., firmware) that may determine control parameters of the imaging device 610 and control parameters of the ISP processor 640 based on the received statistical data. For example, the control parameters of the imaging device 610 may include sensor 620 control parameters (e.g., gain, integration time for exposure control, anti-shake parameters, etc.), camera flash control parameters, lens 612 control parameters (e.g., focal length for focusing or zooming), or a combination of these parameters. The ISP control parameters may include gain levels and color correction matrices for automatic white balance and color adjustment (e.g., during RGB processing), as well as lens 612 shading correction parameters.
The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of the camera anti-shake method.
A computer program product containing instructions which, when run on a computer, cause the computer to perform a camera anti-shake method.
Any reference to memory, storage, database, or other medium used by embodiments of the present application may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A camera anti-shake system, the system comprising: the gyroscope and the anti-shake driving chip are arranged on the main board; the lens and the motor are arranged in the camera module; the gyroscope is connected with the anti-shake driving chip, the anti-shake driving chip is connected with the motor, and the motor is connected with the lens;
the gyroscope is used for acquiring angular velocity information of the lens and sending the angular velocity information to the anti-shake driving chip;
the anti-shake driving chip is used for calculating shake compensation information of the lens according to a target fitting model and the angular velocity information and controlling the motor to be powered on according to the shake compensation information, wherein the determination process of the target fitting model is as follows: the anti-shake driving chip presets reference fitting models corresponding to different lenses, and the reference fitting models are expressed as
Wherein x represents angular velocity information collected by a gyroscope, y (x, w) represents shake compensation information of a lens, and wjTaking j as any natural number as a constant, bringing angular velocity information of the lens and corresponding jitter compensation information into a reference fitting model to obtain a constant w in the reference fitting modeljThe constant w is setjThe target fitting model corresponding to the lens is obtained by being brought into the reference fitting model;
the motor is used for driving the lens to move under the control of the anti-shake driving chip.
2. The system of claim 1, wherein the camera module further comprises a hall sensor; the Hall sensor is connected with the anti-shake driving chip;
the Hall sensor is used for detecting the current position information of the lens and sending the position information to the anti-shake driving chip;
the anti-shake driving chip is further used for controlling the motor to be powered on based on the position information and shake compensation information, so that the motor drives the lens to move.
3. The system of claim 2, wherein a main control chip connected with the hall sensor is further arranged on the main board;
the Hall sensor is also used for acquiring the position offset information of the lens when the lens collects images and sending the position offset information to the main control chip;
the main control chip is further used for determining image offset information of the image based on the position offset information and compensating the image according to the image offset information.
4. The system of claim 1, wherein a main control chip is further disposed on the main board; the main control chip is used for determining a corresponding anti-shake drive chip based on a lens identifier contained in a starting instruction when the starting instruction of a lens is received, and sending the starting instruction to the anti-shake drive chip;
the anti-shake driving chip is further used for sending an angular velocity obtaining instruction to the gyroscope based on the starting instruction;
and the gyroscope is also used for sending the angular speed information to the anti-shake driving chip according to the angular speed acquisition instruction.
5. The system according to claim 4, wherein the anti-shake driver chip is further configured to determine corresponding target attribute data according to the lens identifier, generate the angular velocity obtaining instruction according to the target attribute data, and send the angular velocity obtaining instruction to the gyroscope;
the gyroscope is further configured to configure the gyroscope according to target attribute data included in the angular velocity acquisition instruction, acquire original angular velocity information of the lens, generate target angular velocity information corresponding to the target attribute data according to the original angular velocity information, and send the target angular velocity information to the anti-shake driving chip.
6. The system according to claim 5, wherein the anti-shake driving chip is further configured to obtain a starting time included in the starting instruction, and adjust an angular speed output frequency included in the target attribute data when the starting time is within a preset time period.
7. The system according to claim 1, wherein the anti-shake driver chip comprises a first sub-anti-shake driver chip and a second sub-anti-shake driver chip;
the first sub anti-shake driving chip is used for calculating first compensation information corresponding to a first direction according to the angular speed information and controlling the motor to be powered on according to the first compensation information so as to enable the motor to shake the lens to move in the first direction;
the second sub anti-shake driving chip is used for calculating second compensation information corresponding to a second direction according to the angular velocity information and controlling the motor to be powered on according to the second compensation information so that the motor shakes the lens to move in the second direction.
8. A camera anti-shake method is applied to electronic equipment, and the electronic equipment is characterized by comprising the following steps: the gyroscope and the anti-shake driving chip are arranged on the main board; the lens and the motor are arranged in the camera module; the gyroscope is connected with the anti-shake driving chip, the anti-shake driving chip is connected with the motor, and the motor is connected with the lens; the method comprises the following steps:
acquiring angular velocity information of the lens through the gyroscope, and sending the angular velocity information to the anti-shake driving chip;
calculating shake compensation information of the lens according to a target fitting model and the angular velocity information through the anti-shake driving chip, and controlling the motor to be powered on according to the shake compensation information, wherein the determination process of the target fitting model is as follows: the anti-shake driving chip presets reference fitting models corresponding to different lenses, and the reference fitting models are expressed as
Wherein x represents angular velocity information collected by a gyroscope, y (x, w) represents shake compensation information of a lens, and wjIs constant, j is any natural number, and the angular velocity information of the lens and the corresponding jitter compensation information are introduced into the image processing systemIn the reference fitting model, obtaining a constant w in the reference fitting modeljThe constant w is setjThe target fitting model corresponding to the lens is obtained by being brought into the reference fitting model;
and driving the lens to move under the control of the anti-shake driving chip through the motor.
9. An electronic device characterized in that the electronic device comprises the camera anti-shake system according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the camera anti-shake method as claimed in claim 8.
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