CN105635555B - Camera focusing control method, camera shooting device and wearable intelligent terminal - Google Patents
Camera focusing control method, camera shooting device and wearable intelligent terminal Download PDFInfo
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- CN105635555B CN105635555B CN201410624817.6A CN201410624817A CN105635555B CN 105635555 B CN105635555 B CN 105635555B CN 201410624817 A CN201410624817 A CN 201410624817A CN 105635555 B CN105635555 B CN 105635555B
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Abstract
The invention provides a camera focusing control method, camera equipment and a wearable intelligent terminal, which solve the technical problem that an initial camera target cannot be locked after a camera changes in angle and/or displacement in the prior art; the camera focusing control method comprises the following steps: the method comprises the steps of determining initial focusing parameters of a camera shooting target, determining the rotating angle and/or the moving displacement of a camera according to rotating angle information returned by a gyroscope and/or motion acceleration information returned by a motion sensor, and re-determining the focusing distance of the camera to the camera shooting target based on the rotating angle and/or the moving displacement and the initial focusing parameters so as to enable the camera to be focused on the camera shooting target all the time; the gyroscope and the motion sensor which are arranged in the camera equipment are used for acquiring the rotation angle and/or the moving displacement data of the camera, and focusing the initial camera object again to achieve the technical effect of locking the initial camera object for shooting.
Description
Technical Field
The invention relates to the technical field of photographic devices or equipment, in particular to a camera focusing control mode, camera equipment and a wearable intelligent terminal with the camera equipment and using the camera focusing control method.
Background
When the camera device is used for taking a picture, for example, a camera, a mobile phone with a camera, a wearable intelligent terminal with a camera and the like, an initial camera target is usually locked in a mode of manual focusing of a user or automatic focusing of the camera, and after focusing is completed, a stable posture is required to be kept to ensure that the position of the camera which completes focusing is not changed any more, so that clear shooting of the initial camera target is ensured.
However, after focusing is completed, the camera, especially the wearable smart terminal with the camera worn on the body, usually generates a change in angle and/or displacement along with the natural movement of the body; after the camera has changed in angle and/or displacement, the camera usually relocks the camera target for focusing through automatic focusing, and the relocked camera target is different from the original camera target locked before; it can be seen that the original focusing direction of the camera cannot be maintained to lock the initial shooting target after the angle and/or displacement of the camera is changed.
Disclosure of Invention
The invention aims to provide a camera focusing control method, camera equipment and a wearable intelligent terminal, and aims to solve the technical problem that an initial camera shooting target cannot be locked after a camera changes an angle and/or displacement in the prior art.
The purpose of the invention is realized by the following technical scheme:
provided is a camera focusing control method, including: determining initial focusing parameters of a camera shooting target; determining the rotation angle and/or the moving displacement of the camera according to the rotation angle information returned by the gyroscope and/or the motion acceleration information returned by the motion sensor; and re-determining the focusing distance of the camera to the camera target based on the rotation angle and/or the movement displacement and the initial focusing parameter so that the camera is always focused on the camera target.
Further, before the determining the initial focusing parameters of the imaging target, the method further includes: timing the focusing time of the camera on the camera target; and if the focusing time is longer than the preset time, timing the focusing time of the camera on the camera target again.
Further, after the determining the angle of rotation and/or the displacement of the movement of the camera, the method further comprises: judging whether the accumulated rotation angle of the camera exceeds a rotation angle threshold value or not; if not, keeping the camera focused on the shooting target.
Further, after the determining the angle of rotation and/or the displacement of the movement of the camera, the method further comprises: judging whether the displacement of the accumulated movement of the camera exceeds a displacement threshold value or not; if not, keeping the camera focused on the shooting target.
The camera equipment comprises a camera, a processor, a gyroscope and a motion sensor, wherein the gyroscope and the motion sensor are arranged in the camera equipment; the gyroscope is used for acquiring the rotation angle information of the camera; the motion sensor is used for acquiring motion acceleration information of the camera; the processor determines the rotation angle and/or the movement displacement of the camera according to the rotation angle information returned by the gyroscope and/or the movement acceleration information returned by the movement sensor after determining the initial focusing parameters of the camera target; and based on the rotation angle and/or the displacement of the movement and the initial focusing parameter, re-determining the focusing distance of the camera to the shooting target so as to enable the camera to be always focused on the shooting target.
Further, the processor is further configured to: timing the focusing time of the camera on the camera target; and if the focusing time is longer than the preset time, timing the focusing time of the camera on the camera target again.
Further, the processor is further configured to: after the rotation angle and/or the moving displacement of the camera are determined, whether the accumulated rotation angle of the camera exceeds a rotation angle threshold value is judged; if not, keeping the camera focused on the shooting target.
Further, the processor is further configured to: after the rotation angle and/or the movement displacement of the camera are/is determined, whether the accumulated movement displacement of the camera exceeds a displacement threshold value is judged; if not, keeping the camera focused on the shooting target.
Further, the image pickup apparatus further includes a memory for storing the initial focus parameter.
A wearable intelligent terminal is provided, and comprises the camera device.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following technical effects or advantages: generally, after the camera completes the initial focusing on the shooting target, along with the natural movement of the body, the camera also generates the change of the angle and/or the displacement, there is a problem that the focus is not accurate when the photographing of the photographing target is continued under the initial focusing condition of the photographing target, in the camera focusing control method provided by the embodiment of the invention, the change of the angle and/or displacement generated by the natural motion of the camera with the body is determined according to the rotation angle information and/or the motion acceleration information returned by the gyroscope and/or the motion sensor arranged in the camera equipment, and the focusing distance of the camera to the camera shooting target is adjusted based on the changes, so that the camera can be refocused on the initially focused camera shooting target, and the technical effect that the original focusing direction can be kept to lock the initially focused camera shooting target when the angle and/or displacement of the camera changes is realized.
Drawings
Fig. 1 is a flowchart of a camera focusing control method according to an embodiment of the present invention;
fig. 2 is a schematic focusing diagram in a camera focusing control method according to an embodiment of the present disclosure;
fig. 3 is a block diagram of an image capturing apparatus according to an embodiment of the present application.
Detailed Description
The invention provides a camera focusing control method, camera equipment and a wearable intelligent terminal, solves the technical problem that an initial camera target cannot be locked after a camera is changed in angle and/or displacement in the prior art, and achieves the technical effect of locking the initial camera target for shooting by acquiring the rotation angle and/or the moving displacement data of the camera and focusing the initial camera target again.
The design idea of the embodiment of the invention is that the parameters of angle change and/or displacement change of the camera after focusing are obtained, and the focusing of the camera is readjusted based on the parameters, so that the camera keeps focusing on an initial camera object instead of re-focusing on a new camera object just opposite to the changed camera, and the technical effect of always locking the initial camera object for shooting is achieved. Therefore, in the embodiment of the invention, a gyroscope for measuring the angle change of the camera and a motion sensor for measuring the acceleration change of the camera are added in the camera equipment, so as to obtain the angle change value and/or the displacement movement value of the camera.
The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The camera focusing control method provided by the embodiment of the invention, as shown in fig. 1, comprises the following steps:
step S01, determining the initial focusing parameters of the camera shooting target;
after the camera is focused manually or automatically by a user, a camera shooting target is locked, and parameters according to focusing are determined and recorded. The parameters on which the focusing of the camera is based are illustrated in the following table-1:
TABLE-1:
the content in table-1 shows that the focusing of the camera is determined based on the projection length of the camera object in the optical axis direction of the camera and the vertical distance in the vertical direction of the optical axis, and the focus distance changes when the projection length and the vertical distance change, and the specific relationship between the focus distance and the projection length and the vertical distance is related to the performance parameter of the focusing of the camera, and the relationship between the focus distance and the projection length and the vertical distance is fixed and can be inquired for one camera.
After the camera finishes initial focusing on a camera target, recording data such as projection length, vertical distance and the like according to the focusing; and recording the current angle position of the camera detected by the gyroscope.
Step S02: determining the rotation angle and/or the moving displacement of the camera according to the rotation angle information returned by the gyroscope and/or the motion acceleration information returned by the motion sensor;
after the camera finishes initial focusing and locks a camera target, if the camera rotates in angle and/or moves in displacement along with natural motion of a human body, a gyroscope and a motion sensor which are arranged in the camera equipment acquire angle change and/or displacement change of the camera and send the changed parameters to a processor of the camera equipment, and the processor determines the relative position relation between the camera head and the camera target after rotating and/or displacing based on the parameters and by combining the initial angle position of the camera.
Specifically, the relative position between the optical axis of the camera after rotation and/or movement and the camera target is determined according to the rotation angle and/or the movement displacement and the initial angle position of the camera, so that the projection length and the vertical distance of the camera target relative to the changed optical axis can be determined again.
Step S03: and re-determining the focusing distance of the camera to the camera target based on the rotation angle and/or the displacement of the movement and the initial focusing parameter so that the camera is always focused on the camera target.
Specifically, an embodiment of adjusting the camera to focus on the image pickup object according to the rotation angle and/or the displacement of the movement and the initial focusing parameter is described as follows in combination with the content of table-1 above:
for example, when the camera focuses on the photographic target for the first time, the projection of the photographic target on the optical axis direction of the camera is located (Disz1, Disz2)1Within the interval, the vertical distance in the direction perpendicular to the optical axis is located (Disy1, Disy2)1Within the interval, the corresponding focusing distance based on the two intervals is f 1; when the camera changes the angle and/or displacement, the optical axis direction of the camera changes, and the projection length of the camera object in the optical axis direction after the camera changes is located (Disz1, Disz2)2Within the interval, the vertical distance in the vertical direction is (Disy1, Disy2)2Within the interval, the focusing distance corresponding to the interval based on the two intervals is f 2.
Then after the angle and/or displacement of the camera is changed, the focusing distance is converted from f1 to f2, and the original camera object can be refocused.
Taking fig. 2 as an example, a camera focus control method provided by an embodiment of the present invention is described below, where coordinate XYZ shown by a dotted line is a coordinate system based on which a camera initially locks a camera target, where the camera is located at position o (0), an optical axis direction d1 coincides with a Z-axis direction, an intersection point J of a focus curved surface a and an optical axis is a focus point on the camera target, and a focus distance is f 1; if the camera has changed in angle and/or displacement within the time t, the camera position is moved from o (0) to o (t), the optical axis direction is changed from d1 to d2, the rotation angle is theta, the focusing curved surface moves from a to a 'along with the optical axis, and the best focusing distance for the image pickup object is f2, the best focusing point is on the focusing curved surface B, therefore the processor of the camera controls the focusing position of the camera to adjust the focusing curved surface from a' to B, as can be deduced from the above table-1.
Generally, after the camera completes the initial focusing on the shooting target, along with the natural movement of the body, the camera also generates the change of the angle and/or the displacement, if the camera continues to shoot the camera target under the initial focusing condition of the camera target, the camera focus control method provided by the embodiment of the invention has the problem of inaccurate focus, determining the angle and/or displacement change generated by the camera moving naturally according to the rotation angle information and/or the motion acceleration information returned by the gyroscope and/or the motion sensor arranged in the camera device, and the camera is adjusted to refocus on the initially focused camera target based on the changes, so that the technical effect that the original focusing direction can be kept to lock the initially focused camera target when the angle and/or displacement of the camera is changed is realized.
As shown in fig. 1, the method for controlling focusing of a camera according to an embodiment of the present invention further includes the following steps:
before determining the initial focus parameters of the imaging target, step S011 is executed: timing the focusing time of the camera on the camera target; step S012: judging whether the focusing time of the camera on the camera target is greater than the preset time, if so, timing the focusing time of the camera on the camera target again; if not, executing the step of focusing the shooting target and determining the initial focusing parameters. The preset time set here is to distinguish whether the user intends to photograph the camera object locked by the camera, and if the lock time exceeds the preset time, it indicates that the user intends to photograph the locked camera object, and if the lock time is less than the preset time, it indicates that the user has changed the camera object, it is necessary to re-determine the camera object, perform focusing and determine the focusing parameters.
After the rotation angle and/or the movement displacement of the camera are/is determined according to the rotation angle information returned by the gyroscope and/or the movement acceleration information returned by the movement sensor, the step S021 is preferably executed to judge whether the accumulative rotation angle of the camera exceeds a rotation angle threshold or judge whether the accumulative movement displacement of the camera exceeds a displacement threshold, and if the accumulative rotation angle or the displacement threshold is not exceeded, the step S022 is executed: keeping the camera focused on the camera object. When the angle or displacement of the camera is within the set rotation angle threshold or displacement threshold, the change of the angle or displacement of the camera is slight and is within the tolerance range of the focusing of the camera, so that the camera does not need to be focused again, and if the angle or displacement exceeds the tolerance range of the focusing of the camera, the step S03 needs to be executed to adjust the focusing of the camera on the camera target.
An embodiment of the present invention further provides a camera apparatus, as shown in fig. 3, including a camera 31, a processor 32, a gyroscope 33 disposed in the camera apparatus, and a motion sensor 34; the gyroscope is used for acquiring the rotation angle information of the camera; the motion sensor is used for acquiring motion acceleration information of the camera; after determining the initial focusing parameters of the camera shooting target, the processor determines the rotation angle and/or the movement displacement of the camera according to the rotation angle information returned by the gyroscope and/or the movement acceleration information returned by the movement sensor, and re-determines the focusing distance of the camera to the camera shooting target based on the rotation angle and/or the movement displacement and the initial focusing parameters so as to enable the camera to be focused on the camera shooting target all the time.
Specifically, the processor 32 is further configured to: 1. and timing the focusing time of the camera on the camera target, if the focusing time of the camera on the camera target is less than the preset time, executing the step of focusing the camera target, and determining initial focusing parameters, otherwise, timing the focusing time of the camera on the camera target again. 2. After the rotation angle and/or the moving displacement of the camera are determined, whether the accumulated rotation angle of the camera exceeds a rotation angle threshold value is judged; if not, the camera is kept focused on the shooting target. 3. After the rotation angle and/or the movement displacement of the camera are/is determined, whether the accumulated movement displacement of the camera exceeds a displacement threshold value is judged; if not, the camera is kept focused on the shooting target. The specific contents and effects have been detailed in the above-mentioned camera focusing control method, and are not described herein again.
The camera device provided by the embodiment of the present invention further includes a memory 35, configured to store initial focusing parameters, so that after the angle and/or displacement of the camera is changed, the change direction and the change amount of the angle and/or displacement of the camera are determined based on the stored initial focusing parameters, and the movement direction, the speed, and the rotation angle after the change of the camera are obtained, so as to provide parameters for the camera to focus on the camera target again.
According to the camera equipment provided by the embodiment of the invention, the gyroscope and the motion sensor are utilized, the relation between the motion of the camera equipment and the orientation of the camera can be effectively sensed, the focusing angle of the camera can be automatically adjusted according to the motion, the operation requirement of the camera in the shooting process is effectively simplified, and even if the camera moves naturally along with the body to generate the change of the angle and/or the displacement, the same camera object can still be locked and shot.
The embodiment of the invention also provides a wearable intelligent terminal, such as an intelligent watch, which comprises the camera device, when a user takes a picture through the camera of the wearable intelligent terminal, the user does not need to fix the posture, the same camera target can be taken in the wide-angle range of the camera in the motion process, and the user experience is improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The camera focusing control method is characterized by comprising the following steps:
determining initial focusing parameters of a camera shooting target; the initial focusing parameters comprise a projection length interval of the shooting target in the direction of the optical axis of the lens and a vertical distance interval of the shooting target in the direction vertical to the optical axis of the lens;
determining the rotation angle and/or the moving displacement of the camera according to the rotation angle information returned by the gyroscope and/or the motion acceleration information returned by the motion sensor;
re-determining the focusing distance of the camera to the camera target based on the rotation angle and/or the movement displacement and the initial focusing parameter so that the camera is always focused on the camera target; wherein, re-determining the focusing distance of the camera to the camera target specifically includes: and based on the rotation angle and/or the displacement of the movement and the initial focusing parameter, re-determining a projection length interval of the camera target relative to the changed optical axis and a vertical distance interval relative to the vertical direction of the changed optical axis, and re-determining the focusing distance of the camera to the camera target based on the projection length interval of the camera target relative to the changed optical axis and the vertical distance interval relative to the vertical direction of the changed optical axis.
2. The camera focus control method according to claim 1, wherein before the determining initial focus parameters of an imaging target, the method further comprises:
timing the focusing time of the camera on the camera target;
and if the focusing time is longer than the preset time, timing the focusing time of the camera on the camera target again.
3. The camera focus control method of claim 1, wherein after said determining the angle of camera rotation and/or displacement of movement, the method further comprises:
judging whether the accumulated rotation angle of the camera exceeds a rotation angle threshold value or not;
if not, keeping the camera focused on the shooting target.
4. The camera focus control method of claim 1, wherein after said determining the angle of camera rotation and/or displacement of movement, the method further comprises:
judging whether the displacement of the accumulated movement of the camera exceeds a displacement threshold value or not;
if not, keeping the camera focused on the shooting target.
5. The camera equipment comprises a camera and a processor, and is characterized by further comprising a gyroscope and a motion sensor which are arranged in the camera equipment;
the gyroscope is used for acquiring the rotation angle information of the camera;
the motion sensor is used for acquiring motion acceleration information of the camera;
the processor determines the rotation angle and/or the movement displacement of the camera according to the rotation angle information returned by the gyroscope and/or the movement acceleration information returned by the movement sensor after determining the initial focusing parameters of the camera target; based on the rotation angle and/or the movement displacement and the initial focusing parameter, re-determining the focusing distance of the camera to the camera target so that the camera always focuses on the camera target;
the initial focusing parameters comprise a projection length interval of the shooting target in the direction of the optical axis of the lens and a vertical distance interval of the shooting target in the direction perpendicular to the optical axis of the lens;
the re-determining the focusing distance of the camera to the camera target specifically includes: and based on the rotation angle and/or the displacement of the movement and the initial focusing parameter, re-determining a projection length interval of the camera target relative to the changed optical axis and a vertical distance interval relative to the vertical direction of the changed optical axis, and re-determining the focusing distance of the camera to the camera target based on the projection length interval of the camera target relative to the changed optical axis and the vertical distance interval relative to the vertical direction of the changed optical axis.
6. The image capturing apparatus according to claim 5, wherein the processor is further configured to:
timing the focusing time of the camera on the camera target;
and if the focusing time is longer than the preset time, timing the focusing time of the camera on the camera target again.
7. The image capturing apparatus according to claim 5, wherein the processor is further configured to:
after the rotation angle and/or the moving displacement of the camera are determined, whether the accumulated rotation angle of the camera exceeds a rotation angle threshold value is judged;
if not, keeping the camera focused on the shooting target.
8. The image capturing apparatus according to claim 5, wherein the processor is further configured to:
after the rotation angle and/or the movement displacement of the camera are/is determined, whether the accumulated movement displacement of the camera exceeds a displacement threshold value is judged;
if not, keeping the camera focused on the shooting target.
9. The apparatus according to any one of claims 5 to 8, further comprising a memory for storing the initial focus parameters.
10. A wearable smart terminal characterized by comprising the image pickup apparatus according to any one of claims 5 to 8.
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| CN106101558B (en) * | 2016-07-29 | 2017-09-29 | 广东欧珀移动通信有限公司 | camera focusing method, device and terminal |
| CN108737715A (en) * | 2018-03-21 | 2018-11-02 | 北京猎户星空科技有限公司 | A kind of photographic method and device |
| CN109151302A (en) * | 2018-08-17 | 2019-01-04 | 北京随闻科技有限公司 | A kind of interactive intelligent focusing mechanism, focusing method and its application of wearable device |
| CN111756992A (en) * | 2019-09-23 | 2020-10-09 | 广东小天才科技有限公司 | Wearable device follow-up shooting method and wearable device |
| CN110995991B (en) * | 2019-11-28 | 2021-11-16 | 维沃移动通信有限公司 | Camera control method and wearable device |
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