CN110166695B - Camera anti-shake method and device, electronic equipment and computer readable storage medium - Google Patents
Camera anti-shake method and device, electronic equipment and computer readable storage medium Download PDFInfo
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- CN110166695B CN110166695B CN201910559943.0A CN201910559943A CN110166695B CN 110166695 B CN110166695 B CN 110166695B CN 201910559943 A CN201910559943 A CN 201910559943A CN 110166695 B CN110166695 B CN 110166695B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
Abstract
The application relates to a camera anti-shake method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: receiving a shooting instruction of a panoramic image, controlling a camera to collect a first frame of image according to the shooting instruction, acquiring an initial position of the first frame of image, controlling the camera to continue collecting multiple frames of images according to the shooting instruction, acquiring angular velocity data output by a gyroscope in the collecting process, and performing shake compensation processing on the camera according to the angular velocity data and the initial position. Because can when shooing the panoramic picture, initial position when acquireing the camera and gathering first frame image to at the in-process that the camera continues to gather multiframe image, carry out shake compensation processing to the camera according to angular velocity data and this initial position, can improve the accuracy of camera anti-shake.
Description
Technical Field
The present disclosure relates to the field of image technologies, and in particular, to a camera anti-shake method and apparatus, an electronic device, and a computer-readable storage medium.
Background
With the rapid development of image technology, the phenomenon of taking pictures by using a camera is more and more common. When people use a camera to shoot, the shot image is blurred and not clear due to the shake of the camera. At present, the camera can reduce the influence of camera shaking on imaging definition by integrating technologies such as optical anti-shaking, electronic anti-shaking and photoreceptor anti-shaking.
Disclosure of Invention
The embodiment of the application provides a camera anti-shake method and device, electronic equipment and a computer readable storage medium, which can improve the accuracy of camera anti-shake.
A camera anti-shake method includes:
receiving a shooting instruction of a panoramic image, and controlling a camera to collect a first frame of image according to the shooting instruction;
acquiring an initial position of the camera when the camera collects the first frame of image;
and controlling the camera to continue to collect multi-frame images according to the shooting instruction, acquiring angular velocity data output by a gyroscope in the collection process, and performing shake compensation processing on the camera according to the angular velocity data and the initial position.
A camera anti-shake apparatus comprising:
the image acquisition module is used for receiving a shooting instruction of the panoramic image and controlling the camera to acquire a first frame of image according to the shooting instruction;
the position acquisition module is used for acquiring an initial position when the camera acquires the first frame image;
and the anti-shake compensation module is used for controlling the camera to continue to collect multi-frame images according to the shooting instruction, acquiring angular velocity data output by a gyroscope in the collection process, and carrying out shake compensation processing on the camera according to the angular velocity data and the initial position.
An electronic device comprising a memory and a processor, the memory having stored therein a computer program that, when executed by the processor, causes the processor to perform the steps of:
receiving a shooting instruction of a panoramic image, and controlling a camera to collect a first frame of image according to the shooting instruction;
acquiring an initial position of the camera when the camera collects the first frame of image;
and controlling the camera to continue to collect multi-frame images according to the shooting instruction, acquiring angular velocity data output by a gyroscope in the collection process, and performing shake compensation processing on the camera according to the angular velocity data and the initial position.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
receiving a shooting instruction of a panoramic image, and controlling a camera to collect a first frame of image according to the shooting instruction;
acquiring an initial position of the camera when the camera collects the first frame of image;
and controlling the camera to continue to collect multi-frame images according to the shooting instruction, acquiring angular velocity data output by a gyroscope in the collection process, and performing shake compensation processing on the camera according to the angular velocity data and the initial position.
According to the camera anti-shake method, the camera anti-shake device, the electronic equipment and the computer readable storage medium, the camera can be controlled to collect the first frame of image according to the shooting instruction of the panoramic image, the initial position of the first frame of image is obtained, so that the angular velocity data output by the gyroscope is obtained in the process that the camera continues to collect the multi-frame image according to the shooting instruction, the camera is subjected to shake compensation processing according to the angular velocity data and the initial position, and the accuracy of camera anti-shake can be 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 diagram of an exemplary embodiment of an application environment of a camera shake prevention method;
FIG. 2 is a schematic diagram of an image processing circuit in one embodiment;
FIG. 3 is a flowchart of a camera anti-shake method in one embodiment;
FIG. 4 is a flow diagram of a process for camera shake compensation in one embodiment;
FIG. 5 is a diagram illustrating camera shake compensation in one embodiment;
FIG. 6 is a flowchart of a camera shake compensation process according to another embodiment;
FIG. 7 is a schematic diagram of the range of motion that a camera can move according to one embodiment;
FIG. 8 is a schematic illustration of a viewing area in one embodiment;
FIG. 9 is a flow diagram of synthesizing a target panoramic image in one embodiment;
fig. 10 is a block diagram showing a structure of a camera shake preventing apparatus according to an embodiment;
FIG. 11 is a block diagram of an electronic device 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 the terms "first," "second," and the like, as used herein, may be used herein to describe various elements or attributes, but these elements or attributes are not limited by these terms. These terms are only used to distinguish one element from another, or from one property or property. For example, a first direction may be referred to as a second direction, and similarly, a second direction may be referred to as a first direction, without departing from the scope of the present application. The first direction and the second direction are both directions, but they are not the same direction.
Fig. 1 is a schematic application environment diagram of a camera anti-shake method in an embodiment. As shown in fig. 1, the application environment includes an electronic device 100. The electronic device 100 includes a camera 110. Specifically, the electronic device 100 may receive a shooting instruction of the panoramic image, control the camera 110 to collect a first frame image according to the shooting instruction, obtain an initial position when the camera 110 collects the first frame image, and further control the camera 110 to continue to collect multiple frame images according to the shooting instruction, and in the collecting process, obtain angular velocity data output by the gyroscope, and perform anti-shake compensation processing on the camera according to the angular velocity data and the initial position. The electronic device 100 may be, but is not limited to, various mobile phones, tablet computers, or personal digital assistants or wearable devices, etc.
The embodiment of the application also provides the electronic equipment. The electronic device includes Image Processing circuitry, which may be implemented using hardware and/or software components, and may include various Processing units that define an ISP (Image Signal Processing) pipeline. FIG. 2 is a schematic diagram of an image processing circuit in one embodiment. As shown in fig. 2, 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. 2, the image processing circuit includes an ISP processor 240 and control logic 250. The image data captured by the imaging device 210 is first processed by the ISP processor 240, and the ISP processor 240 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 210. The imaging device 210 may include a camera having one or more lenses 212 and an image sensor 214. The image sensor 214 may include an array of color filters (e.g., Bayer filters), and the image sensor 214 may acquire light intensity and wavelength information captured with each imaging pixel of the image sensor 214 and provide a set of raw image data that may be processed by the ISP processor 240. The sensor 220 (e.g., gyroscope) may provide parameters of the acquired image processing (e.g., anti-shake parameters) to the ISP processor 240 based on the type of interface of the sensor 220. The sensor 220 interface may utilize an SMIA (Standard Mobile Imaging Architecture) interface, other serial or parallel camera interfaces, or a combination of the above.
In addition, the image sensor 214 may also send raw image data to the sensor 220, the sensor 220 may provide the raw image data to the ISP processor 240 based on the sensor 220 interface type, or the sensor 220 may store the raw image data in the image memory 230.
The ISP processor 240 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 240 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 240 may also receive image data from the image memory 230. For example, the sensor 220 interface sends raw image data to the image memory 230, and the raw image data in the image memory 230 is then provided to the ISP processor 240 for processing. The image Memory 230 may be a portion 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 image sensor 214 interface or from sensor 220 interface or from image memory 230, ISP processor 240 may perform one or more image processing operations, such as temporal filtering. The processed image data may be sent to image memory 230 for additional processing before being displayed. ISP processor 240 receives processed data from image memory 230 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 240 may be output to display 270 for viewing by a user and/or further processed by a Graphics Processing Unit (GPU). Further, the output of the ISP processor 240 may also be sent to the image memory 230, and the display 270 may read image data from the image memory 230. In one embodiment, image memory 230 may be configured to implement one or more frame buffers. In addition, the output of the ISP processor 240 may be transmitted to an encoder/decoder 260 for encoding/decoding the image data. The encoded image data may be saved and decompressed before being displayed on the display 270 device. The encoder/decoder 260 may be implemented by a CPU or GPU or coprocessor.
The statistics determined by ISP processor 240 may be sent to control logic 250 unit. For example, the statistical data may include image sensor 214 statistics such as auto-exposure, auto-white balance, auto-focus, flicker detection, black level compensation, lens 212 shading correction, and the like. Control logic 250 may include a processor and/or microcontroller that executes one or more routines (e.g., firmware) that may determine control parameters of imaging device 210 and ISP processor 240 based on the received statistical data. For example, the control parameters of the imaging device 210 may include sensor 220 control parameters (e.g., gain, integration time for exposure control, anti-shake parameters, etc.), camera flash control parameters, lens 212 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 212 shading correction parameters.
The imaging device 210 is a camera provided in this embodiment of the application, and when receiving a shooting instruction of a panoramic image, the electronic device may control the imaging device 210 to start shooting the image, and the ISP processor 240 may obtain an initial position when the imaging device 210 collects a first frame of image, and in a process that the imaging device 210 continues to collect multiple frames of images according to the shooting instruction, obtain angular velocity data output by the sensor 220, and perform shake compensation processing on the imaging device 210 according to the angular velocity data and the initial position. Optionally, in some embodiments, the central processing unit of the electronic device may also obtain an initial position when the imaging device 210 captures a first frame of image, and obtain angular velocity data output by the sensor 220 during the process that the imaging device 210 captures multiple frames of images according to the shooting instruction, so as to perform shake compensation processing on the imaging device 210 according to the angular velocity data and the initial position. Based on the difference of the optical anti-shake structure of the imaging device 210, when the electronic device performs the shake compensation process on the imaging device 210, the electronic device may move the lens in the imaging device 210 to implement the shake compensation process, or may move the imaging device 210 to implement the shake compensation process, which is not limited herein.
Fig. 3 is a flowchart of a camera anti-shake method in an embodiment. The camera shake prevention method in this embodiment is described by taking the electronic device in fig. 1 as an example. As shown in fig. 3, the camera anti-shake method includes steps 302 to 306.
And step 302, receiving a shooting instruction of the panoramic image, and controlling the camera to collect a first frame image according to the shooting instruction.
The shooting instruction of the panoramic image can be generated by clicking a button on the display screen or a user pressing a control on the touch screen, and the electronic device can receive the shooting instruction of the panoramic image. Optionally, the electronic device may adjust the mode of the camera to a panoramic shooting mode, display that the current shooting mode is the panoramic mode on the display screen, and receive a shooting instruction for the panoramic image in the panoramic mode.
And after the electronic equipment receives the shooting instruction of the panoramic image, controlling the camera to start shooting the image. Generally, when an electronic device acquires a panoramic image through a camera, a plurality of frames of images need to be shot in the moving process of the camera, so that the shot plurality of frames of images are combined into one panoramic image. The first frame image is shot after the electronic equipment receives a shooting instruction of the panoramic image.
And 304, acquiring an initial position of the camera when the camera collects the first frame of image.
The electronic device can acquire an initial position when the camera acquires the first frame image. The initial position refers to specific position information of the camera when the first frame image is acquired. Specifically, the electronic device may obtain the initial position of the camera when the first frame of image is captured according to the position of the electronic device when the first frame of image is captured by the camera and the position of the camera in the electronic device. Optionally, the position of the camera may be represented by a field of view region of the camera, where the field of view region refers to a picture range of an image acquired by the camera; the field of view areas corresponding to the positions of the cameras at different positions are different, and the electronic device may mark the position of the camera in the picture range where the first frame of image is acquired as an initial position, which is not limited herein.
And step 306, controlling the camera to continue to collect the multi-frame images according to the shooting instruction, acquiring angular velocity data output by the gyroscope in the collection process, and performing shake compensation processing on the camera according to the angular velocity data and the initial position.
A gyroscope is an angular motion detection device for detecting angular velocity. In the process of shooting images by the camera, if the camera shakes or moves, the imaging definition of the camera is affected, and the collected images are blurred. The gyroscope can acquire and output angular velocity data when the camera shakes. Generally, when an electronic device acquires a panoramic image through a camera, a plurality of frames of images need to be shot in the moving process of the camera, so that the shot plurality of frames of images are combined into one panoramic image. The electronic device can perform anti-shake compensation processing on the camera in the shooting process of the panoramic image.
After the electronic equipment collects the first frame of image according to the shooting instruction, the electronic equipment can continue to collect multiple frames of images according to the shooting instruction, acquire angular velocity data output by the gyroscope in the process of collection, and perform shake compensation processing on the camera according to the initial position and the angular velocity data when the camera collects the first frame of image. Specifically, the electronic device may calculate shake compensation data of the camera according to the initial position and the angular velocity data, so as to drive the motor of the camera to be powered up according to the shake compensation data, so that the motor drives the camera or a lens in the camera to move, so as to compensate for the offset of the camera, and improve an image instruction acquired by the camera.
In the panoramic mode, the electronic device provides a moving direction of the camera during shooting, and the moving direction is usually taken as a reference for a first frame of image collected by the camera. The user can move or rotate the electronic equipment according to the moving direction, so that the camera can acquire different images of multiple frames of view field areas in the moving or rotating process of the electronic equipment. However, the direction in which the electronic device is manually moved or rotated often cannot be consistent with the direction of movement provided by the electronic device.
The embodiment that this application provided, through in camera anti-shake compensation process, the initial position when acquireing the camera and gathering first frame image, at the in-process that the camera continues to gather multiframe image according to the shooting instruction, carry out shake compensation processing to the camera according to the angular velocity data of this initial position and gyroscope output, the direction that the camera shot multiframe image when can avoid carrying out shake compensation processing to the camera according to angular velocity data is inconsistent with the moving direction that electronic equipment provided, the accuracy of camera anti-shake when can improve panoramic image and shoot.
In one embodiment, a camera shake preventing method is provided, in which a camera shake compensation process is performed according to angular velocity data and position information, and includes:
and step 402, analyzing first shaking data of the camera in a first direction according to the angular speed data.
The first direction is a direction different from the direction of movement provided by the electronic device. In the embodiment of the present application, the first direction is a direction perpendicular to a moving direction provided by the electronic device, and it should be noted that the first direction is not limited to the direction perpendicular to the moving direction provided by the electronic device. The angular speed data output by the gyroscope comprises the shaking conditions of the camera in different directions, and the electronic equipment can analyze the first shaking data of the camera in the first direction according to the angular speed data output by the gyroscope. For example, when the electronic device determines from the first frame image captured by the camera that the provided moving direction is a horizontal direction parallel to the horizon, the first direction may be a direction perpendicular to the ground plane, and the electronic device may analyze the first shake data of the camera in the first direction according to the angular velocity data.
The position of the camera can be determined according to the position of the electronic equipment and the position of the camera in the electronic equipment. The electronic device can acquire a first position where the camera is currently located.
And 406, moving the camera from the first position to a second position according to the first shake data and the initial position, wherein the distance between the second position and the initial position in the first direction is smaller than that between the first position and the initial position in the first direction.
The first position is the position of the camera before the shake compensation, and the second position is the position of the camera after the shake compensation is performed on the camera. The electronic device can move the camera from the first position to a second position according to the first shaking data and the initial position when the camera collects the first frame image, and the distance between the second position and the initial position in the first direction is smaller than that between the first position and the initial position in the first direction. The smaller the distance between the position of the camera and the initial position in the first direction is, the smaller the deviation between the camera and the moving direction is, and the higher the utilization rate of the acquired image is. Optionally, in some embodiments, the second position is a distance of 0 in the first direction from the initial position.
In some embodiments, the electronic device may obtain a first position where the lens in the camera is currently located by moving the lens in the camera to implement the shake compensation process, so as to move the lens from the first position to the second position according to the first shake data and the initial position.
Fig. 5 is a diagram illustrating camera shake compensation in one embodiment. As shown in fig. 5, an area 502 is a range in which a camera in an electronic device can move, an initial position 504 is a position when the camera captures a first frame image, a first position 506 is a position of the camera before shake compensation, and a second position 508 is a position of the camera after shake compensation. The electronic equipment deviates from a preset moving direction 510 in the moving process, the electronic equipment analyzes first shake data of the camera in a first direction 512 according to angular velocity data output by the gyroscope, and shake compensation processing is performed on the camera according to the initial position 504 and the first shake data, so that the distance between the second position 508 where the compensated camera is located and the initial position 504 in the first direction 512 is smaller than the distance between the first position 506 and the initial position 504 in the first direction 512, namely the camera is maintained in the same direction when acquiring multi-frame images, and the accuracy of camera shake prevention can be improved. Meanwhile, the problem that the acquired images are inconsistent due to the deviation of the lens and the panoramic image needs to be obtained by greatly cutting during synthesis can be solved, and the utilization rate of the acquired images and the quality of the panoramic image can be improved.
It should be noted that, in this embodiment, only the shake compensation method in the first direction is described, and in this embodiment, the shake compensation process in other directions, such as the moving direction, may be performed while the shake compensation process in the first direction is performed on the camera.
In one embodiment, the camera anti-shake method further includes: acquiring a preset moving direction of the camera; and carrying out shake compensation processing on the camera according to the moving direction and the angular speed data.
In the panoramic mode, the electronic equipment provides the moving direction of the camera in the shooting process, and a user can move or rotate the electronic equipment according to the moving direction, so that the camera can acquire different images of multiple frames of view fields in the moving or rotating process of the electronic equipment. The electronic device can acquire a preset moving direction of the camera. And the electronic equipment performs shake compensation processing on the camera according to the moving direction and the angular speed data. Specifically, after receiving a shooting instruction of the panoramic image, the electronic device may perform shake compensation processing on the camera according to the moving direction and the angular velocity data, so that the electronic device may acquire each frame of image based on the shake-compensated camera.
When the camera collects a plurality of frames of images in the moving process of the electronic equipment, after the electronic equipment collects one frame of image, whether the next frame of image is shot or not can be determined according to the moving amplitude of the electronic equipment or the change amplitude of a shot picture. The example that the electronic device determines whether to take the next frame of image according to the movement amplitude is taken as an example for explanation, after the electronic device finishes the current frame of image acquisition, the electronic device can control the camera to acquire the next frame of image when the movement amplitude of the electronic device exceeds the preset movement amplitude. Optionally, the electronic device may control the camera to perform shake compensation processing in a direction opposite to the moving direction when the difference between the moving amplitude and the preset moving amplitude exceeds the threshold; when the difference value between the moving amplitude and the preset amplitude is smaller than the threshold value, the camera is controlled to perform shake compensation processing in the moving direction, so that the overlapping area between multi-frame images can be improved, the problem of poor panoramic image synthesis effect caused by overlarge difference between the images is avoided, and the quality of the panoramic image is improved. Of course, the electronic device may perform the shake compensation process on the camera according to the moving direction and the angular velocity data based on the variation range of the shot picture.
Optionally, when the electronic device controls the camera to collect the first frame of image, the camera may perform shake compensation processing in a direction opposite to the moving direction according to the moving direction and the angular velocity data; when the camera is controlled to collect the last frame of image in the panoramic image, the camera is subjected to shake compensation processing towards the moving direction according to the moving direction and the angular speed data, so that image frames contained in the panoramic image can be increased, and the imaging effect of the panoramic image is improved.
In one embodiment, a camera shake preventing method is provided, in which a camera shake compensation process is performed on the camera according to a moving direction and angular velocity data, and the method includes:
In particular, the electronic device may typically show the direction of movement and the viewing area of the camera on the display screen in a panorama mode. The finder area is a screen range of a panoramic image obtained by moving the camera for shooting. The electronic device may sequentially divide a viewing area of the camera into a first area and a second area according to the moving direction. Alternatively, the viewing area may include only the first area and the second area, or may include the first area, the second area, and other areas other than the first area and the second area. In some embodiments, the electronic device may further sequentially divide the viewing area of the camera into at least two areas according to the moving direction.
And step 604, when the field of view area of the camera is in the first area, controlling the camera to perform shake compensation processing in the direction opposite to the moving direction according to the angular speed data.
The electronic device may control the camera to perform shake compensation processing in a direction opposite to the moving direction according to the angular velocity data when the field of view area of the camera is in the first area. Alternatively, the electronic device may determine that the field of view region of the camera is in the first region when a ratio of an overlapping area between the field of view region and the first region of the camera to an area of the field of view region of the camera exceeds a ratio threshold. The ratio threshold may be set according to the actual application requirement, such as 40%, 50%, 60%, etc., but is not limited thereto.
And 606, controlling the camera to perform shake compensation processing towards the moving direction according to the angular speed data when the field of view area of the camera is in the second area.
The electronic device may control the camera to perform shake compensation processing in the moving direction according to the angular velocity data when the field of view area of the camera is in the second area. The manner of determining whether the field of view area of the camera is in the second area by the electronic device is similar to the manner of determining whether the field of view area is in the first area, and details thereof are not repeated here.
The camera is controlled to shake in the direction opposite to the moving direction according to the angular velocity data when the view field area of the camera is in the first area, and the camera is controlled to shake in the moving direction according to the angular velocity data when the view field area of the camera is in the second area, so that the anti-shake accuracy of the camera can be improved, and the picture range of the panoramic image can be improved.
In one embodiment, the viewing area further comprises an intermediate area located between the first area and the second area; the electronic device may further control the camera to perform shake compensation processing to an intermediate position according to the angular velocity data when the field of view area of the camera is in the intermediate area, where the intermediate position is an intermediate position of a range in which the camera can move in the moving direction.
The viewing area also includes an intermediate area located between the first area and the second area. That is, the electronic device may divide the viewing area into a first area, a middle area, and a second area in order according to the moving direction. When the field of view area of the camera is in the middle area, the electronic device may control the camera to perform shake compensation processing to the middle position according to the angular velocity data. The intermediate position is a position in the middle of a range in which the camera can move in the moving direction.
FIG. 7 is a schematic diagram of a range in which a camera can move according to one embodiment. As shown in fig. 7, the area 702 is a movable range of the camera, the direction indicated by the arrow in the figure is a moving direction, and the middle position 704 is a middle position of the movable range of the camera in the moving direction.
FIG. 8 is a schematic view of a viewing area in one embodiment. As shown in fig. 8, the viewing area 802 may be divided into a first area 804, a middle area 806, and a second area 808 in order according to the moving direction. The electronic equipment can adopt different shake compensation directions to carry out shake compensation processing on the camera according to the area where the view field area of the camera is located, and the anti-shake accuracy of the camera can be improved.
In one embodiment, the camera anti-shake method for electronic device improvement further comprises: and acquiring a multi-frame image acquired by the camera according to the shooting instruction. And synthesizing the multi-frame images to obtain a target panoramic image.
The multi-frame images collected by the camera according to the shooting instruction comprise a first frame image and a multi-frame image collected continuously after the first frame image is collected. The synthesis processing is an operation of generating a final image from a plurality of frames of images according to a certain rule. The electronic equipment carries out synthesis processing on the multi-frame images to obtain a target panoramic image. Specifically, the electronic device may determine the image areas overlapped in different images or the positions of the same feature in different images by detecting image information included in the multi-frame images, so that the multi-frame images may be stitched and synthesized at the image areas of the overlapped images and the positions of the same feature points to obtain the target panoramic image. Alternatively, the electronic device may find the matched same feature points in different images by combining SIFT (Scale-invariant feature transform), RANSAC (Random Sample Consensus), and the like.
The camera is controlled to carry out shake compensation processing on the camera according to the angular velocity data output by the gyroscope and the initial position of the camera when the camera collects the first frame image in the process of collecting the multi-frame image according to the shooting instruction, so that the multi-frame image collected by the camera and the first frame image can be kept in the same direction, the image picture shot by the camera can be better kept by the synthesized target panoramic image, the situation that the image needs to be greatly cut when the panoramic image is synthesized due to the deviation generated when the camera moves is avoided, and the quality of the target panoramic image can be improved.
In an embodiment, the process of synthesizing multiple frames of images to obtain a target panoramic image in the provided camera anti-shake method includes:
and step 902, acquiring angular velocity data corresponding to each frame of image.
The angular velocity data corresponding to an image is angular velocity data output from a gyroscope during the exposure time of the image. The angular velocity data corresponding to each frame image may be one or more.
In step 904, offset data of the image corresponding to the angular velocity data is calculated from the angular velocity data.
The electronic device calculates offset data of an image corresponding to the angular velocity data from the angular velocity data. Specifically, the electronic device may determine the position offset of the camera when acquiring the image according to the angular velocity data, and then calculate the offset data of the image according to the position offset. The position deviation refers to the deviation of the position of the lens when the image sensor collects the image. The offset data refers to the deviation between the positions of the pixels of the image acquired by each pixel in the image relative to the condition that the device does not shake. Specifically, the offset data includes an offset angle, direction, offset amount, and the like of each pixel point in the image.
The electronic device may determine image offset data of the image by presetting an offset conversion function when the position offset 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 of the lens into offset data of an image. The offset of the lens in different directions can be brought into corresponding variables in a preset offset conversion function, and offset data of the image can be obtained through calculation.
The image information contained in the image acquired by the electronic equipment in the shaking process has offset. The electronic device may perform compensation processing on the image corresponding to the angular velocity data according to the offset data, and specifically, the electronic device may perform adjustment including, but not limited to, rotation, translation, cropping, and the like on the image according to an angle, a direction, and an offset in the offset data.
And 908, synthesizing the compensated multi-frame images to obtain a target panoramic image.
Determining offset data of an image corresponding to the angular velocity data according to the angular velocity data, performing shake compensation processing on the image according to the offset data, and performing synthesis processing on the multi-frame image after the shake compensation processing to obtain a target panoramic image. That is, the secondary compensation processing can be performed according to the angular velocity data, so that the accuracy of the compensation processing can be improved, and the quality of the synthesized target panoramic image can be improved.
It should be understood that although the steps in the flowcharts of fig. 3, 4, 6, and 9 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 some of the steps in fig. 3, 4, 6, and 9 may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternatingly with other steps or at least some of the sub-steps or stages of other steps.
Fig. 10 is a block diagram of a camera shake prevention apparatus according to an embodiment. As shown in fig. 10, the camera anti-shake apparatus includes:
the image acquisition module 1002 is configured to receive a shooting instruction of the panoramic image, and control the camera to acquire a first frame of image according to the shooting instruction.
The position obtaining module 1004 is configured to obtain an initial position when the camera collects the first frame image.
And the anti-shake compensation module 1006 is configured to control the camera to continue to acquire multi-frame images according to the shooting instruction, acquire angular velocity data output by the gyroscope in the acquisition process, and perform shake compensation processing on the camera according to the angular velocity data and the initial position.
The camera anti-shake device that this application embodiment provided for in camera anti-shake compensation process, initial position when acquireing the camera and gathering first frame image, at the in-process that the camera continues to gather multiframe image according to the shooting instruction, carry out shake compensation according to this initial position and the angular velocity data of gyroscope output to the camera and handle, can avoid carrying out the inconsistent problem of direction and the direction of movement that electronic equipment provided that the camera shot multiframe image when shake compensation handles according to the angular velocity data to the camera, the accuracy of camera anti-shake when can improve panoramic image and shoot.
In one embodiment, the anti-shake compensation module 1006 may be further configured to analyze first shake data of the camera in the first direction according to the angular velocity data; acquiring a first position where a camera is currently located; and moving the camera from the first position to a second position according to the first shaking data and the initial position, wherein the distance between the second position and the initial position in the first direction is smaller than the distance between the first position and the initial position in the first direction.
In one embodiment, the anti-shake compensation module 1006 may further be configured to obtain a preset moving direction of the camera; and carrying out shake compensation processing on the camera according to the moving direction and the angular speed data.
In one embodiment, the anti-shake compensation module 1006 may be further configured to sequentially divide a viewing area of the camera into a first area and a second area according to the moving direction; when the field of view area of the camera is in the first area, controlling the camera to perform shake compensation processing in the direction opposite to the moving direction according to the angular speed data; and when the field of view area of the camera is in the second area, controlling the camera to carry out shake compensation processing towards the moving direction according to the angular speed data.
In one embodiment, the anti-shake compensation module 1006 may be further configured to control the camera to perform shake compensation processing to an intermediate position according to the angular velocity data when the field of view area of the camera is in the intermediate area, where the intermediate position is an intermediate position of a range in which the camera can move in the moving direction.
In one embodiment, the provided camera anti-shake apparatus further includes a synthesis processing module 1008, where the synthesis processing module 1008 is configured to obtain a plurality of frames of images collected by the camera according to the shooting instruction; and synthesizing the multi-frame images to obtain a target panoramic image.
In one embodiment, the composition processing module 1008 may also be configured to obtain angular velocity data corresponding to each frame of image; calculating offset data of an image corresponding to the angular velocity data according to the angular velocity data; compensating the image corresponding to the angular velocity data according to the offset data; and synthesizing the compensated multi-frame image to obtain a target panoramic image.
The division of each module in the camera anti-shake apparatus is only used for illustration, and in other embodiments, the camera anti-shake apparatus may be divided into different modules as needed to complete all or part of the functions of the camera anti-shake apparatus.
Fig. 11 is a schematic diagram of an internal structure of an electronic device in one embodiment. As shown in fig. 11, the electronic device includes a processor and a memory connected by a system bus. Wherein, the processor is used for providing calculation and control capability and supporting the operation of the whole electronic equipment. The memory may include a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program can be executed by a processor for implementing a camera anti-shake method provided in the following embodiments. The internal memory provides a cached execution environment for the operating system computer programs in the non-volatile storage medium. The electronic device may be a mobile phone, a tablet computer, or a personal digital assistant or a wearable device, etc.
The implementation of each module in the camera anti-shake device provided in the embodiment of the present application may be in the form of a computer program. The computer program may be run on a terminal or a server. The program modules constituted by the computer program may be stored on the memory of the terminal or the server. Which when executed by a processor, performs the steps of the method described in the embodiments of the present application.
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 method is applied to electronic equipment and comprises the following steps:
receiving a shooting instruction of a panoramic image, and controlling a camera to collect a first frame of image according to the shooting instruction;
acquiring an initial position of the camera when the camera collects the first frame of image;
controlling the camera to continue to collect multi-frame images according to the shooting instruction, controlling the camera to collect the next frame of image when the movement amplitude of the electronic equipment exceeds a preset movement threshold or the change amplitude of a shot picture exceeds a preset change threshold in the collection process, acquiring angular velocity data output by a gyroscope, and performing shake compensation processing on the camera according to the angular velocity data and the initial position so as to enable the camera to move along a straight line where the movement direction provided by the electronic equipment is;
dividing a viewing area of the camera into a first area and a second area in sequence according to the moving direction, controlling the camera to perform shake compensation processing in a direction opposite to the moving direction according to the angular velocity data when the viewing area of the camera is in the first area, and controlling the camera to perform shake compensation processing in the moving direction according to the angular velocity data when the viewing area of the camera is in the second area;
and after the acquisition is finished, obtaining a target panoramic image based on the acquired multi-frame image.
2. The method according to claim 1, wherein the performing a shake compensation process on the camera according to the angular velocity data and the initial position comprises:
analyzing first shaking data of the camera in a first direction according to the angular speed data;
acquiring a first position where the camera is located currently;
and moving the camera from a first position to a second position according to the first shaking data and the initial position, wherein the distance between the second position and the initial position in the first direction is smaller than the distance between the first position and the initial position in the first direction.
3. The method of claim 1, further comprising:
when the ratio of the overlapping area of the field of view area of the camera and the first area to the area of the field of view area of the camera is larger than a ratio threshold value, determining that the field of view area of the camera is in the first area.
4. The method according to claim 1, wherein the controlling the camera to perform the shake compensation process in the direction opposite to the moving direction according to the angular velocity data when the field of view area of the camera is in the first area, and controlling the camera to perform the shake compensation process in the moving direction according to the angular velocity data when the field of view area of the camera is in the second area comprises:
when the camera collects a first frame of image, controlling the camera to perform shake compensation processing in a direction opposite to the moving direction according to the angular speed data;
and when the camera collects the last frame of image, controlling the camera to carry out shake compensation processing towards the moving direction according to the angular speed data.
5. The method of claim 1, wherein the viewing area further comprises an intermediate area between the first area and the second area; the method further comprises the following steps:
and when the field of view area of the camera is in the middle area, controlling the camera to perform shake compensation processing to the middle position according to the angular speed data, wherein the middle position is the middle position of the range in which the camera can move in the moving direction.
6. The method according to any one of claims 1 to 5, wherein obtaining the target panoramic image based on the acquired multi-frame images after the acquisition is finished comprises:
acquiring a plurality of frames of images acquired by the camera according to the shooting instruction;
and synthesizing the multi-frame images to obtain a target panoramic image.
7. The method according to claim 6, wherein the synthesizing the multi-frame image to obtain the target panoramic image further comprises:
acquiring angular velocity data corresponding to each frame of image;
calculating offset data of an image corresponding to the angular velocity data according to the angular velocity data;
according to the offset data, compensating the image corresponding to the angular velocity data;
and synthesizing the compensated multi-frame image to obtain a target panoramic image.
8. A camera anti-shake device, characterized by comprising:
the image acquisition module is used for receiving a shooting instruction of the panoramic image and controlling the camera to acquire a first frame of image according to the shooting instruction;
the position acquisition module is used for acquiring an initial position when the camera acquires the first frame image;
the anti-shake compensation module is used for controlling the camera to continue to collect multi-frame images according to the shooting instruction, controlling the camera to collect the next frame of image to obtain angular velocity data output by a gyroscope when the movement amplitude of the electronic equipment exceeds a preset movement threshold or the change amplitude of a shot picture exceeds a preset change threshold in the collection process, performing shake compensation processing on the camera according to the angular velocity data and the initial position so that the camera moves along a straight line of the movement direction provided by the electronic equipment, sequentially dividing a viewing area of the camera into a first area and a second area according to the movement direction, and controlling the camera to perform shake compensation processing in a direction opposite to the movement direction according to the angular velocity data when the viewing area of the camera is in the first area, when the field of view area of the camera is in the second area, controlling the camera to perform shake compensation processing towards the moving direction according to the angular speed data;
and the image generation module is used for obtaining a target panoramic image based on the collected multi-frame images after the collection is finished.
9. An electronic device comprising a memory and a processor, the memory having stored therein a computer program that, when executed by the processor, causes the processor to perform the steps of the camera anti-shake method 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 method according to any one of claims 1 to 7.
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