CN110198413B - Video shooting method, video shooting device and electronic equipment - Google Patents
Video shooting method, video shooting device and electronic equipment Download PDFInfo
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- CN110198413B CN110198413B CN201910554321.9A CN201910554321A CN110198413B CN 110198413 B CN110198413 B CN 110198413B CN 201910554321 A CN201910554321 A CN 201910554321A CN 110198413 B CN110198413 B CN 110198413B
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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
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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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
- H04N23/62—Control of parameters via user interfaces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The embodiment of the invention provides a video shooting method, a video shooting device and electronic equipment, wherein the method is applied to the shooting device and comprises the following steps: determining a shooting subject from a shooting picture; acquiring the size parameter of the shooting subject in the shooting picture; and adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, wherein the size of the shooting subject in the shooting picture after adjustment is matched with the size of the shooting subject in the shooting picture before adjustment. The embodiment of the invention can improve the video shooting effect of the shooting device.
Description
Technical Field
The present invention relates to the field of video shooting technologies, and in particular, to a video shooting method, a video shooting device, and an electronic device.
Background
In the video shooting process, the shooting subjects (such as human faces, objects and the like) in the video can be tracked and shot through an object tracking technology.
In the related art, as the distance between the photographing device and the photographic subject is changed, the size of the photographic subject in the photographed video is also changed, for example: when the distance between the shooting device and the shooting subject is small, the proportion of the shooting subject in the shooting picture is large; when the distance between the photographing device and the photographic subject is large, the occupation ratio of the photographic subject in the photographed picture is small, which causes the size of the photographic subject in the video to change suddenly with the distance between the photographing device and the photographic subject.
Therefore, the video shooting method in the related art has the problem of poor shooting effect.
Disclosure of Invention
The embodiment of the invention provides a video shooting method, a video shooting device and electronic equipment, and aims to solve the problem of poor shooting effect of the video shooting method in the related art.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a video shooting method, which is applied to a shooting device, and the method includes:
determining a shooting subject from a shooting picture;
acquiring the size parameter of the shooting subject in the shooting picture;
and adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, wherein the size of the shooting subject in the shooting picture after adjustment is matched with the size of the shooting subject in the shooting picture before adjustment.
In a second aspect, an embodiment of the present invention further provides a video capture apparatus, including:
a first determination module for determining a photographic subject from a photographic picture;
the acquisition module is used for acquiring the size parameters of the shooting subject in the shooting picture;
and the adjusting module is used for adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting main body in the shooting picture, wherein the size of the shooting main body in the shooting picture after adjustment is matched with the size of the shooting main body in the shooting picture before adjustment.
In a third aspect, an embodiment of the present invention further provides an electronic device, including: the video shooting method comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the video shooting method provided by the embodiment of the invention.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps in the video shooting method provided by the embodiment of the present invention.
In the embodiment of the present invention, a photographic subject is determined from a photographic picture; acquiring the size parameter of the shooting subject in the shooting picture; and adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, wherein the size of the shooting subject in the shooting picture after adjustment is matched with the size of the shooting subject in the shooting picture before adjustment. Therefore, the size change of the shooting subject in the shooting picture can be reduced, and the problem of poor shooting effect caused by the large size change of the shooting subject in the shooting picture is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart of a video shooting method according to an embodiment of the present invention;
fig. 2 is an application scene diagram of a video shooting method according to an embodiment of the present invention;
fig. 3 is a second application scenario diagram of a video shooting method according to an embodiment of the present invention;
FIG. 4 is a block diagram of a video camera according to an embodiment of the present invention;
FIG. 5 is a second block diagram of a video camera according to an embodiment of the present invention;
FIG. 6 is a third block diagram of a video camera according to an embodiment of the present invention;
FIG. 7 is a fourth block diagram of a video camera according to an embodiment of the present invention;
FIG. 8 is a fifth diagram of a video camera according to an embodiment of the present invention;
fig. 9 is a block diagram of an electronic device provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a video shooting method according to an embodiment of the present invention, where the video shooting method can be applied to a shooting device. As shown in fig. 1, the video photographing method may include the steps of:
In this step, the shooting subject may be determined from the shooting picture according to the operation of the user, and of course, in the specific implementation, a target may be selected from the shooting picture according to the shooting device as the shooting subject, for example: and if the shooting picture comprises a plurality of persons, the shooting device selects one of the persons with the largest size as a shooting subject.
In practical applications, the main shooting body frame may be selected by using a frame in the shooting picture to prompt the user that the main body framed by the frame is the main shooting body. In addition, if the user needs to replace the imaging subject, the user can perform an operation of replacing the imaging subject on the imaging screen, for example: and clicking the touch area where the replaced shooting main body is located to replace the shooting main body with a main body object corresponding to the touch area, and framing the replaced shooting main body through a frame. It should be noted that, in the specific implementation, the edge of the photographic subject may be identified through an object tracking technology, and then the frame size of the photographic subject selected by the frame is controlled to match the edge of the photographic subject, so as to avoid the problem of poor frame selection effect caused by too large or too small frame. Specifically, when a face appears in a shot picture, a face detection technology is used to default to select the face as a shot subject; if the shot picture has more faces, the largest face (namely the face with the largest face frame area) is taken as the shot subject.
Of course, if a pet, a human body or other subjects with clear edges appear in the shot picture, the subject can be automatically detected as the shot subject by the related technology, and the corresponding rectangular frame is displayed. If the main objects do not exist, the user can be prompted to click the selected shooting main object on the touch screen by displaying a mode of 'please click the main object to be shot' on the display screen, and the like. In addition, if the edge of the subject cannot be identified by using the object tracking technology after the user clicks the subject on the touch screen (for example, the subject is too close to the background color and has no obvious edge), the user is prompted to 'the subject cannot be identified and please re-select'. In addition, if the subject object identified by the user's clicking operation on the touch screen is not intended by the user, the user may re-click and re-select the subject object as the photographic subject by re-identifying through the object tracking technology.
And 102, acquiring the size parameter of the shooting subject in the shooting picture.
In a specific implementation, the size parameter may be any one or more of a length, a width, and an area of the photographing subject, and a length, a width, and an area of a frame corresponding to the photographing subject, which may indicate a size of the photographing subject in the photographing screen, and is not exhaustive here.
The size of the subject in the shooting picture after the adjustment is matched with the size of the subject in the shooting picture before the adjustment, which may be: the size of the shooting subject in the shooting picture after adjustment is similar to or equal to the size of the shooting subject in the shooting picture before adjustment.
In a specific implementation, the focal length of the shooting device can be changed by adjusting the zoom factor of the shooting device, so that the size of a shooting subject in a shooting picture can be enlarged or reduced. In implementation, the corresponding relationship between the degree of change of the size parameter of the shooting subject in the shooting picture and the zoom multiple may be stored in advance, and corresponding zooming may be performed according to the size of the degree of change of the size, for example: and controlling the zoom multiple of the shooting device to be reduced by 0.1 time and the like when the size parameter of the shooting subject in the shooting picture is increased by 0.1mm (millimeter). It should be noted that the adjustment value of the zoom multiple may also be related to the current zoom multiple of the shooting device, the size parameter of the shooting subject in the shooting picture, and the like, and the description is given here only as an example.
In addition, in practical applications, when the zoom factor of the imaging device is changed, the size of the background or other objects in the captured image other than the subject of the imaging device is also changed, and is not particularly limited herein.
In practical applications, the steps 102 and 103 are repeatedly executed, for example: the shooting device acquires the size parameter of the shooting subject once every 0.01s (second), and performs zooming once according to the change of the size parameter of the shooting question; or, when detecting that the length of the photographic subject in the shooting picture is increased by 0.01mm, controlling the shooting device to perform primary zooming so that the length of the photographic subject in the shooting picture after zooming is reduced by 0.01mm, thereby restoring to the length before the increase.
It should be noted that, in the specific implementation, the time interval or the size change degree of the step 102 and the step 103 is repeatedly executed, and is not limited to 0.01s or 0.01mm, and is used for illustration only. In addition, in the case that the time interval or the size change degree between the step 102 and the step 103 is repeatedly executed is sufficiently small, the shooting picture can be prevented from shaking, thereby improving the shooting effect.
The embodiment can realize a shooting method of 'Hooke zooming' (or also called 'continuous zooming'), wherein the shooting method is to reversely change the focal length according to the distance change between the shooting device and the shooting main body in the shooting process, so that the visual perspective relation is changed, the size change of the shooting main body is small, and the background space is compressed or amplified, thereby creating a science fiction and cool lens feeling and achieving the purpose of improving the shooting effect.
In a specific implementation, the shooting Device may be a shooting Device on an electronic Device with a video shooting function, such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), a Computer, or a notebook Computer.
In the embodiment of the present invention, a photographic subject is determined from a photographic picture; acquiring the size parameter of the shooting subject in the shooting picture; and adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, wherein the size of the shooting subject in the shooting picture after adjustment is matched with the size of the shooting subject in the shooting picture before adjustment. Therefore, the size change of the shooting subject in the shooting picture can be reduced, and the problem of poor shooting effect caused by the large size change of the shooting subject in the shooting picture is solved.
As an optional implementation manner, the step of adjusting the zoom factor of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture includes:
controlling the zoom multiple of the shooting device to be increased under the condition that the size parameter of the shooting subject in the shooting picture is reduced;
and controlling the zoom multiple of the shooting device to be reduced when the size parameter of the shooting subject in the shooting picture is increased.
In a specific implementation, when the zoom multiple of the shooting device is increased, the size parameter of the shooting subject in the shooting picture is also increased; and if the zoom multiple of the shooting device is reduced, the size parameter of the shooting subject in the shooting picture is also reduced.
In a specific implementation, the value of the zoom factor increase or decrease may be determined according to a degree of change of a size parameter of the photographic subject in the photographic image, a current zoom factor of the photographic device, zoom accuracy of the photographic device, and the like, so that after the zoom factor is adjusted, a size of the photographic subject in the photographic image matches a size of the photographic subject in the photographic image before the adjustment.
In this embodiment, the zoom factor of the photographing device is controlled to be adjusted in a reverse direction according to whether the size parameter of the photographing body in the photographing picture is increased or decreased, so that the size of the photographing body in the photographing picture matches the size of the photographing body in the photographing picture before adjustment after the zoom factor is adjusted.
As an optional implementation manner, before adjusting the zoom factor of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, the method further includes:
receiving a first operation of a user on the shooting subject;
adjusting an initial zoom multiple of the photographing apparatus in response to the first operation;
the step of adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture comprises the following steps:
and controlling the zoom times of the shooting device to be adjusted based on the initial zoom times according to the change of the size parameters of the shooting main body in the shooting picture.
In a specific implementation, the first operation may be an operation such as zooming in or zooming out on the shooting subject, wherein after the shooting subject is zoomed in, the zoom factor of the shooting device is correspondingly increased; after the shooting subject is reduced, the zoom multiple of the shooting device is correspondingly reduced.
In addition, the step of receiving a first operation of the shooting subject by the user and the step of adjusting the initial zoom multiple of the shooting device in response to the first operation may be a preset process before starting video shooting, for example: after the shooting main body is determined from the shooting picture, the user is reminded to set an initial zoom multiple by displaying a mode of 'please adjust the focal length to enable the main body to reach the size wanted by the user' on the display screen, and then after the initial zoom multiple is set, a button for starting video shooting is clicked to start video shooting. The step of receiving a first operation of the user on the shooting subject and the step of adjusting the initial zoom factor of the shooting device in response to the first operation may also be an adjustment performed during video shooting, and are not limited specifically herein.
In practical applications, after initializing the shooting device, the shooting device may acquire a shooting picture at a default zoom multiple, where the default zoom multiple may cause the size of the shooting subject selected by the user to be too small or too large in the shooting picture, in this embodiment, the user may adjust a size parameter of the shooting subject in the shooting picture to a suitable value through a first operation, and during the shooting process, correspondingly adjust the zoom multiple of the shooting device based on an initial zoom multiple corresponding to the size parameter of the shooting subject in the shooting picture after the user adjusts, so that in the shooting picture, the size parameter of the shooting subject in the shooting picture matches with the size parameter of the shooting subject in the shooting picture after the user adjusts through the first operation, thereby enabling the size of the shooting subject in the shooting picture to meet the requirements of the user, thereby achieving the purpose of improving the shooting effect.
As an optional implementation manner, after acquiring the size parameter of the photographic subject in the photographic picture, the method further includes:
outputting a current zoom factor of the photographing apparatus, and outputting at least one of a minimum zoom factor and a maximum zoom factor.
In a specific implementation, the outputting the current zoom multiple and the maximum zoom multiple of the shooting device or the outputting the current zoom multiple and the minimum zoom multiple of the shooting device may be by any one or more of displaying, voice outputting, and the like.
In addition, the maximum zoom factor and the minimum zoom factor may be a maximum zoom factor and a minimum zoom factor currently allowed by the photographing apparatus, and in a specific implementation, the maximum zoom factor and the minimum zoom factor are related to performance parameters and the like of the photographing apparatus.
In implementation, the distance between the shooting device and the shooting main body can be further increased when the current zoom multiple of the shooting device is smaller than the maximum zoom multiple by informing the user of the current zoom multiple and the maximum zoom multiple of the shooting device; in addition, the distance between the shooting device and the shooting main body can be further reduced when the current zoom multiple of the shooting device is larger than the minimum zoom multiple by informing the user of the current zoom multiple and the minimum zoom multiple of the shooting device.
The above embodiment is exemplified by displaying the current zoom multiple, the maximum zoom multiple, and the minimum zoom multiple of the photographing apparatus on a mobile phone:
as shown in fig. 2, in this embodiment, a human face is used as a shooting subject, and the current zoom multiple, the maximum zoom multiple, and the minimum zoom multiple of the shooting device are displayed in a progress bar manner, where the current zoom multiple of the shooting device is 1.5 times, the maximum zoom multiple is 10 times, and the minimum zoom multiple is 1 time. At this time, the zoom factor representing the mobile phone camera may further increase or decrease based on the current zoom factor, so that when it is determined that the distance between the mobile phone camera and the shooting subject increases or decreases within a certain range, it may still be ensured that the change of the size parameter of the shooting subject in the shooting picture is small.
In a specific implementation, the maximum zoom multiple and the minimum zoom multiple of the shooting device may be used as an upper limit value and a lower limit value of the progress bar, and each progress value on the progress bar is uniformly distributed.
In this embodiment, the user can also move up and down on the progress bar by controlling the progress value corresponding to the current zoom multiple of the mobile phone camera, so as to achieve the purpose of adjusting the initial zoom multiple of the mobile phone camera.
In the embodiment, the user can know in advance whether the shooting device is allowed to further reduce or increase the distance between the shooting device and the shooting main body, and the problems that the size parameter of the shooting main body in the shooting picture is reduced or the shooting main body cannot be well focused and the like caused by further increasing the distance between the shooting device and the shooting main body when the current zoom multiple is equal to the maximum zoom multiple are avoided; in addition, the problems that when the current zoom multiple is equal to the minimum zoom multiple, the distance between the shooting device and the shooting main body is further reduced, the size parameter of the shooting main body in a shooting picture is increased or the shooting main body cannot be well focused and the like are solved, and therefore the reliability of the video shooting method is improved.
As an optional embodiment, after determining the photographic subject from the photographic picture, the method further comprises:
determining an available value range of a distance between the photographing device and the photographing subject according to target parameters, wherein the target parameters include: a current distance between the photographic subject and the photographic device, a current zoom factor of the photographic device, a maximum zoom factor of the photographic device, and a minimum zoom factor of the photographic device;
determining a forward-allowable distance and a backward-allowable distance according to a current distance between the photographing device and the photographing subject and an allowable value range of a distance between the photographing device and the photographing subject;
outputting the advanceable distance and the retreatable distance.
In a specific implementation, the current distance between the photographing subject and the photographing apparatus may be detected by a Time of flight (TOF) camera, and of course, the current distance between the photographing subject and the photographing apparatus may also be acquired by other distance detection apparatuses, which is not limited herein.
In addition, in a specific implementation, the forward distance and the backward distance may be output by voice broadcasting, displaying on a display screen, or the like, and the following is an example of a manner in which the forward distance and the backward distance are displayed on a mobile phone, and the foregoing implementation of outputting the forward distance and the backward distance is described as an example:
referring to fig. 3, in the embodiment, a TOF camera is installed on a mobile phone, a human face is used as a shooting subject, and the forward distance and the backward distance are displayed in a progress bar manner, where the forward distance is 0.5m (meter) and the backward distance is 2 m. In this embodiment, it is further displayed on the progress bar that the current zoom magnification of the TOF camera is 1.5 times.
In a specific application, when the mobile phone moves towards a direction close to the shooting main body, the forward moving distance is reduced according to the moving distance, the backward moving distance is increased according to the moving distance, and the position of the current zoom multiple of the TOF camera on the progress bar is correspondingly changed, so that the distance root of one end of the progress bar where the current zoom multiple and the forward moving distance are located is reduced along with the reduction of the forward moving distance, and the distance root of one end of the progress bar where the current zoom multiple and the backward moving distance are located is increased along with the increase of the backward moving distance. For example: in the application scenario shown in fig. 3, if the mobile phone moves back 0.5m away from the main shooting body, the position of the current zoom multiple on the progress bar moves to the end close to the retractable distance, so that the forward-moving distance becomes 1.0m and the retractable distance becomes 1.5 m.
In one embodiment, a mapping relationship between an available value range of a distance between the imaging device and the imaging subject and the current distance, the current zoom multiple, the maximum zoom multiple, and the minimum zoom multiple may be stored in advance, so that when the current distance, the current zoom multiple, the maximum zoom multiple, and the minimum zoom multiple are determined, the available value range of the distance between the imaging device and the imaging subject mapped thereto may be determined, an absolute value of a difference between a minimum value of the available value range and the current distance may be used as the advance distance, and an absolute value of a difference between a maximum value of the available value range and the current distance may be used as the retreat distance.
In another embodiment, calculation formulas of the advanceable distance and the retractable distance, respectively, and the current distance, the current zoom factor, the maximum zoom factor, and the minimum zoom factor may be stored in advance, so that the values of the advanceable distance and the retractable distance may be calculated according to the formulas.
For example: before the shooting device leaves the factory, values of parameters in a calculation formula are determined according to performance parameters of the shooting device, specifically, it can be assumed that the length of a certain current object is w, the current distance between the object and the shooting device is x, the current zoom multiple of the shooting device is n, the length of the object in a shooting picture is s, and accordingly, a calculation model between s and the parameters is established as follows: s ═ k × w × n ÷ (x + c), the computational model represents: the larger the current distance between the object and the shooting device is, the smaller the size of the object in the shooting picture is, and in order to keep the size of the object in the shooting picture stable, the zoom factor of the shooting device needs to be changed.
In implementation, k and c in the calculation model may be preset constants, and the values thereof may be determined through the following process:
assuming that in the initial state n is 1 (no magnification) and w is 0.01m (1 cm length of the target):
when x is 0m, S is 0.01k/c, and the size of S is obtained, and the value of S is S1, namely S1 is 0.01 k/c;
when x is 1m, S is 0.01k/(c +1), and the size of S is obtained, assuming that S is S2 and S2 is 0.01k/(c + 1).
By comparing the formula: and solving S1 and S2 to 0.01k/(c +1), so that specific values of k and c can be calculated.
After the values of k and c are determined, if the minimum zoom multiple of the shooting device is assumed to be 1, the maximum zoom multiple is NmaxThe advanceable distance X may be determined by the following procedureGo forwardAnd said retreatable distance XRetreatThe value of (A) is as follows:
Xgo forward＝x-Xmin＝(x+c)×(n-1)÷n；
XRetreat＝Xmax-x＝(x+c)×(Nmax-n)÷n。
Wherein, X isminRepresents the minimum distance, X, between the imaging device and the subjectmaxRepresents the maximum distance between the photographing device and the photographing body.
X is aboveRetreatThe process of pushing to the formula of (c) is as follows:
by the formula: s ═ k × w × n ÷ (x + c);
therefore, the following steps are carried out: w ÷ s ═ x + c ÷ (k × n);
thus, it follows: x is k × w × n ÷ s-c.
At N equal to NmaxWhen X also takes the maximum value XmaxThus, it follows: xmax＝k×w×Nmax÷S-C；
Combining the formula to obtain: xRetreat＝(x+c)×(Nmax-n)÷n。
In addition, the XGo forwardAnd the derivation process of the calculation formula of (2) and the XRetreatThe derivation of the formula (c) is similar and is not repeated here.
It should be noted that, in this embodiment, assuming that the minimum zoom multiple of the shooting device is 1, when the minimum zoom multiple of the shooting device is changed, the above formulas for calculating k, c, the forward-able distance, and the backward-able distance are also changed accordingly, and the formulas for calculating k, c, the forward-able distance, and the backward-able distance are not limited herein.
The embodiment can inform the user of specific values of the advancing distance and the retreating distance in the video shooting process in advance so that the user can judge whether the current shooting environment meets the requirements or not, and the problem that video shooting cannot be completed under the conditions that obstacles exist in the shooting environment or the shooting space is small and the like is solved.
In a specific implementation, the above-mentioned shooting subject may be fixed at a specific position (for example, any position of the middle, the upper left corner, etc.) in the shooting picture by a technology such as cropping the angle of view of video shooting, so as to achieve the effect of shaking the shooting picture, thereby further improving the shooting effect of the shot video.
Referring to fig. 4, an embodiment of the present invention further provides a video camera 400, as shown in fig. 4, the video camera 400 includes:
a first determination module 401 for determining a photographic subject from a photographic screen;
an obtaining module 402, configured to obtain a size parameter of the photographic subject in the photographic frame;
an adjusting module 403, configured to adjust a zoom multiple of the shooting device according to a change of a size parameter of the shooting subject in the shooting picture, where a size of the shooting subject in the shooting picture after the adjustment matches a size of the shooting subject in the shooting picture before the adjustment.
Optionally, as shown in fig. 5, the adjusting module 403 includes:
a first control unit 4031 for controlling the zoom magnification of the photographing apparatus to increase in a case where a size parameter of the photographic subject in the photographing screen decreases;
a second control unit 4032 configured to control the zoom factor of the imaging apparatus to decrease when the size parameter of the subject in the imaging screen increases.
Optionally, as shown in fig. 6, the video camera 400 further includes:
a receiving module 404, configured to receive a first operation of a user on the photographic subject;
a response module 405, configured to adjust an initial zoom multiple of the camera in response to the first operation;
the adjusting module 403 is specifically configured to:
and controlling the zoom times of the shooting device to be adjusted based on the initial zoom times according to the change of the size parameters of the shooting main body in the shooting picture.
Optionally, as shown in fig. 7, the video camera 400 further includes:
a first output module 406, configured to output a current zoom multiple of the shooting device, and output at least one of a minimum zoom multiple and a maximum zoom multiple.
Optionally, as shown in fig. 8, the video camera 400 further includes:
a second determining module 407, configured to determine an available value range of a distance between the shooting device and the shooting subject according to target parameters, where the target parameters include: a current distance between the photographic subject and the photographic device, a current zoom factor of the photographic device, a maximum zoom factor of the photographic device, and a minimum zoom factor of the photographic device;
a third determining module 408, configured to determine a forward-able distance and a backward-able distance according to a current distance between the photographing device and the photographing subject and a range of available values of a distance between the photographing device and the photographing subject;
a second output module 409, configured to output the forward distance and the backward distance.
The video shooting device provided by the embodiment of the invention can realize each process in any video shooting method embodiment provided by the embodiment of the invention, and can improve the video shooting effect of the video shooting device, and in order to avoid repetition, the video shooting device is not repeated.
Referring to fig. 9, fig. 9 is a schematic diagram of a hardware structure of an electronic device for implementing various embodiments of the present invention.
The electronic device 900 includes, but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910, and a power supply 911. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 9 does not constitute a limitation of electronic devices that may include more or fewer components than shown, or that certain components may be combined, or that a different arrangement of components may be used. In the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, a pedometer, a computer, a notebook computer, and the like.
Wherein, the processor 910 is configured to:
determining a shooting subject from a shooting picture;
acquiring the size parameter of the shooting subject in the shooting picture;
and adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, wherein the size of the shooting subject in the shooting picture after adjustment is matched with the size of the shooting subject in the shooting picture before adjustment.
Optionally, the step of adjusting the zoom factor of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, which is executed by the processor 910, includes:
controlling the zoom multiple of the shooting device to be increased under the condition that the size parameter of the shooting subject in the shooting picture is reduced;
and controlling the zoom multiple of the shooting device to be reduced when the size parameter of the shooting subject in the shooting picture is increased.
Optionally, before the adjusting of the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture is performed, the user input unit 907 is configured to: receiving a first operation of a user on the shooting subject;
the processor 910 is configured to: adjusting an initial zoom multiple of the photographing apparatus in response to the first operation;
the step of adjusting the zoom factor of the photographing apparatus according to the change of the size parameter of the photographing subject in the photographing screen, which is performed by processor 910, includes:
and controlling the zoom times of the shooting device to be adjusted based on the initial zoom times according to the change of the size parameters of the shooting main body in the shooting picture.
Optionally, the processor 910 is further configured to: after the acquiring of the size parameter of the photographic subject in the photographic picture, controlling the audio output unit 903 and/or the display unit 906 to perform:
outputting a current zoom factor of the photographing apparatus, and outputting at least one of a minimum zoom factor and a maximum zoom factor.
Optionally, after determining the subject from the shooting picture, the processor 910 is further configured to:
determining an available value range of a distance between the photographing device and the photographing subject according to target parameters, wherein the target parameters include: a current distance between the photographic subject and the photographic device, a current zoom factor of the photographic device, a maximum zoom factor of the photographic device, and a minimum zoom factor of the photographic device;
determining a forward-allowable distance and a backward-allowable distance according to a current distance between the photographing device and the photographing subject and an allowable value range of a distance between the photographing device and the photographing subject;
the audio output unit 903 and/or the display unit 906 are controlled to output the advanceable distance and the retractable distance.
In this embodiment, the electronic device 900 may adjust the zoom factor according to the change of the size parameter of the photographic subject in the photographic image, so that the size change of the photographic subject in the photographic image is small, and the method has the same beneficial effects as the method embodiment.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 901 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 910; in addition, the uplink data is transmitted to the base station. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 901 can also communicate with a network and other devices through a wireless communication system.
The electronic device provides wireless broadband internet access to the user via the network module 902, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.
The audio output unit 903 may convert audio data received by the radio frequency unit 901 or the network module 902 or stored in the memory 909 into an audio signal and output as sound. Also, the audio output unit 903 may provide audio output related to a specific function performed by the electronic device 900 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 903 includes a speaker, a buzzer, a receiver, and the like.
The input unit 904 is used to receive audio or video signals. The input Unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042, and the Graphics processor 9041 processes image data of a still picture or video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 906. The image frames processed by the graphic processor 9041 may be stored in the memory 909 (or other storage medium) or transmitted via the radio frequency unit 901 or the network module 902. The microphone 9042 can receive sounds and can process such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 901 in case of the phone call mode.
The electronic device 900 also includes at least one sensor 905, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 9061 according to the brightness of ambient light, and the proximity sensor may turn off the display panel 9061 and/or the backlight when the electronic device 900 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of an electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 905 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described in detail herein.
The display unit 906 is used to display information input by the user or information provided to the user. The Display unit 906 may include a Display panel 9061, where the Display panel 9061 is a foldable screen, and the Display panel 9061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 907 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 9071 (e.g., operations by a user on or near the touch panel 9071 using a finger, a stylus, or any other suitable object or accessory). The touch panel 9071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 910, receives a command from the processor 910, and executes the command. In addition, the touch panel 9071 may be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 907 may include other input devices 9072 in addition to the touch panel 9071. Specifically, the other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, and the like), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 9071 may be overlaid on the display panel 9061, and when the touch panel 9071 detects a touch operation on or near the touch panel 9071, the touch panel is transmitted to the processor 910 to determine the type of the touch event, and then the processor 910 provides a corresponding visual output on the display panel 9061 according to the type of the touch event. Although in fig. 9, the touch panel 9071 and the display panel 9061 are two independent components to implement the input and output functions of the electronic device, in some embodiments, the touch panel 9071 and the display panel 9061 may be integrated to implement the input and output functions of the electronic device, which is not limited herein.
The interface unit 908 is an interface for connecting an external device to the electronic apparatus 900. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 908 may be used to receive input from external devices (e.g., data information, power, etc.) and transmit the received input to one or more elements within the electronic device 900 or may be used to transmit data between the electronic device 900 and external devices.
The memory 909 may be used to store software programs as well as various data. The memory 909 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 909 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
The processor 910 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 909 and calling data stored in the memory 909, thereby performing overall monitoring of the electronic device. Processor 910 may include one or more processing units; preferably, the processor 910 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 910.
The electronic device 900 may further include a power supply 910 (e.g., a battery) for supplying power to various components, and preferably, the power supply 910 may be logically connected to the processor 910 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.
In addition, the electronic device 900 includes some functional modules that are not shown, and thus are not described in detail herein.
Preferably, an embodiment of the present invention further provides an electronic device, which includes a processor 910, a memory 909, and a computer program that is stored in the memory 909 and can be run on the processor 910, and when the computer program is executed by the processor 910, the processes of the video shooting method embodiment are implemented, and the same technical effect can be achieved, and in order to avoid repetition, details are not described here again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling an electronic device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A video shooting method is applied to a shooting device and is characterized by comprising the following steps:
determining a shooting subject from a shooting picture;
determining a forward-allowable distance and a backward-allowable distance according to a current distance between the photographing device and the photographing subject and an allowable value range of a distance between the photographing device and the photographing subject;
outputting the advanceable distance and the retreatable distance;
acquiring the size parameter of the shooting subject in the shooting picture;
and adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture, wherein the size of the shooting subject in the shooting picture after adjustment is matched with the size of the shooting subject in the shooting picture before adjustment.
2. The method of claim 1, wherein the step of adjusting the zoom factor of the photographing apparatus according to the change of the size parameter of the photographic subject in the photographing screen comprises:
controlling the zoom multiple of the shooting device to be increased under the condition that the size parameter of the shooting subject in the shooting picture is reduced;
and controlling the zoom multiple of the shooting device to be reduced when the size parameter of the shooting subject in the shooting picture is increased.
3. The method according to claim 1, wherein before adjusting the zoom factor of the photographing apparatus according to a change in a size parameter of the photographic subject in the photographing screen, the method further comprises:
receiving a first operation of a user on the shooting subject;
adjusting an initial zoom multiple of the photographing apparatus in response to the first operation;
the step of adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting subject in the shooting picture comprises the following steps:
and controlling the zoom times of the shooting device to be adjusted based on the initial zoom times according to the change of the size parameters of the shooting main body in the shooting picture.
4. The method according to claim 1, wherein after acquiring the size parameter of the photographic subject in the photographic screen, the method further comprises:
outputting a current zoom factor of the photographing apparatus, and outputting at least one of a minimum zoom factor and a maximum zoom factor.
5. The method of claim 1, wherein after determining the photographic subject from the photographic picture, the method further comprises:
determining an available value range of a distance between the photographing device and the photographing subject according to target parameters, wherein the target parameters include: a current distance between the photographic subject and the photographic device, a current zoom factor of the photographic device, a maximum zoom factor of the photographic device, and a minimum zoom factor of the photographic device.
6. A video camera, comprising:
a first determination module for determining a photographic subject from a photographic picture;
a third determination module, configured to determine a forward-allowable distance and a backward-allowable distance according to a current distance between the photographing device and the photographing subject and an available value range of a distance between the photographing device and the photographing subject;
a second output module for outputting the advanceable distance and the retreatable distance;
the acquisition module is used for acquiring the size parameters of the shooting subject in the shooting picture;
and the adjusting module is used for adjusting the zoom multiple of the shooting device according to the change of the size parameter of the shooting main body in the shooting picture, wherein the size of the shooting main body in the shooting picture after adjustment is matched with the size of the shooting main body in the shooting picture before adjustment.
7. The video camera of claim 6, wherein the adjustment module comprises:
a first control unit configured to control a zoom factor of the photographing apparatus to increase in a case where a size parameter of the photographing body in the photographing screen decreases;
a second control unit configured to control the zoom factor of the photographing apparatus to decrease in a case where a size parameter of the photographing body in the photographing screen increases.
8. The video camera of claim 6, wherein said video camera further comprises:
the receiving module is used for receiving a first operation of a user for the shooting subject;
a response module, configured to adjust an initial zoom multiple of the photographing apparatus in response to the first operation;
the adjusting module is specifically configured to:
and controlling the zoom times of the shooting device to be adjusted based on the initial zoom times according to the change of the size parameters of the shooting main body in the shooting picture.
9. The video camera of claim 6, wherein said video camera further comprises:
the first output module is used for outputting the current zoom multiple of the shooting device and outputting at least one of the minimum zoom multiple and the maximum zoom multiple.
10. The video camera of claim 6, wherein said video camera further comprises:
a second determination module, configured to determine an available value range of a distance between the photographing apparatus and the photographing subject according to target parameters, where the target parameters include: a current distance between the photographic subject and the photographic device, a current zoom factor of the photographic device, a maximum zoom factor of the photographic device, and a minimum zoom factor of the photographic device.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps in the video capturing method of any one of claims 1 to 5 when executing the computer program.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps in the video capturing method according to any one of claims 1 to 5.
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| CN113079312A (en) * | 2020-01-06 | 2021-07-06 | 北京小米移动软件有限公司 | Method and device for adjusting focal length of camera, electronic equipment and storage medium |
| CN111225144A (en) * | 2020-01-13 | 2020-06-02 | 上海摩象网络科技有限公司 | Video shooting method and device, electronic equipment and computer storage medium |
| CN111277750B (en) * | 2020-01-13 | 2022-04-01 | 上海摩象网络科技有限公司 | Shooting control method and device, electronic equipment and computer storage medium |
| CN113747085B (en) * | 2020-05-30 | 2023-01-06 | 华为技术有限公司 | Method and device for shooting video |
| CN113491102A (en) * | 2020-08-25 | 2021-10-08 | 深圳市大疆创新科技有限公司 | Zoom video shooting method, shooting system, shooting device and storage medium |
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