CN107370936B - Zoom method and zoom device - Google Patents
Zoom method and zoom device Download PDFInfo
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- CN107370936B CN107370936B CN201610317242.2A CN201610317242A CN107370936B CN 107370936 B CN107370936 B CN 107370936B CN 201610317242 A CN201610317242 A CN 201610317242A CN 107370936 B CN107370936 B CN 107370936B
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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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- 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
Abstract
The invention discloses a zooming method and a zooming device, wherein the zooming method comprises the following steps: detecting a current distance between the photographing apparatus and an apparatus user; determining focal length information according to the current distance; and generating a control signal containing focal length information, and zooming according to the control signal. According to the invention, zooming is carried out by adjusting the distance between the photographic equipment and the equipment user, the zooming and composition process is automatically completed, and the movement operation is carried out without frequently changing two hands between the equipment screen and the equipment frame, so that the control complexity is reduced, the shooting convenience is improved, the zooming time is reduced, the shooting equipment user is enabled to concentrate on the framing process without missing the situation of shooting the wonderful moment, and the composition speed and quality are improved; furthermore, the mobile phone does not need to frequently move between the mobile phone screen and the mobile phone frame, so that the risk of dropping the mobile phone screen and breaking the screen is reduced, and the operation experience and the imaging effect of the equipment user are improved.
Description
Technical Field
The invention belongs to the technical field of focal length adjustment of photographic equipment, and particularly relates to a zooming method and a zooming device.
Background
The existing zooming of a camera of intelligent terminal equipment is generally completed by pinching and putting two fingers on a touch screen based on the observation of a user on screen imaging during composition, namely, the existing zooming mode is manually completed.
The existing zooming mode brings about several problems: firstly, the zooming process is completed by pinching and releasing one hand of a user, the other hand must firmly hold the terminal equipment, otherwise, the equipment is in danger of falling; secondly, after the focal length is properly adjusted, the hand performing the pinch-and-play operation needs to grasp the other side of the terminal equipment again, and human eyes pay attention to the equipment frame in the process and miss the golden time of composition; thirdly, the terminal device with the full touch screen often cannot touch the screen too much when taking a picture, otherwise, the extra operation on the interface can respond to other function settings of the device, so that the fingers of a general user grasp the frame of the device, zooming and focusing are the two most frequent operations in taking a picture, the focusing of the current camera is often automatic, zooming is related to composition, so that the camera cannot be automatically completed only manually, the right hand needs to be frequently changed between the screen and the frame of the device, the operation process is complicated and inconvenient, and even the wonderful moment of taking a picture can be missed. In summary, the existing mode of manually completing the zooming process is poor in user operation experience and photographing effect.
Disclosure of Invention
The invention aims to provide a zooming method and a zooming device.
In order to solve the problems, the invention adopts the following technical scheme:
a zooming method, suitable for a photographic apparatus, comprising the steps of:
detecting a current distance between the photographing apparatus and an apparatus user;
determining focal length information according to the current distance;
and generating a control signal containing focal length information, and zooming according to the control signal.
Accordingly, the present invention also provides a zoom apparatus comprising:
the current distance detection module is used for detecting the current distance between the photographic equipment and the equipment user;
the focal length information determining module is used for determining focal length information according to the current distance;
and the zooming module is used for generating a control signal containing the focal length information and zooming according to the control signal.
Compared with the prior art, the invention has the following beneficial effects:
the automatic zooming method of the invention generates a control signal containing focal length information based on the current distance by acquiring the current distance between the photographic equipment and the face, and zooms according to the control signal; according to the method, zooming is carried out according to the distance between the photographic equipment and the equipment user, the zooming and composition process is automatically completed, and the movement operation is carried out without frequently changing hands between the equipment screen and the equipment frame, so that the control complexity is reduced, the shooting convenience is improved, the zooming time is reduced, the shooting user is enabled to concentrate on the framing process without missing the situation of shooting a wonderful moment, and the composition speed and quality are improved; furthermore, the mobile phone does not need to frequently move between the mobile phone screen and the mobile phone frame, so that the risk of dropping the mobile phone screen and breaking the mobile phone screen is reduced, and the user operation experience and the imaging effect are improved.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flow chart illustrating a zooming method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a distance map and focal length map of a camera device and a user in accordance with the present invention;
fig. 3 is a schematic structural diagram of a zoom apparatus according to another embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As will be appreciated by those skilled in the art, a "terminal" as used herein includes both devices having a wireless signal receiver, which are devices having only a wireless signal receiver without transmit capability, and devices having receive and transmit hardware, which have devices having receive and transmit hardware capable of two-way communication over a two-way communication link. Such a device may include: a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; PCS (Personal Communications Service), which may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, internet/intranet access, a web browser, a notepad, a calendar and/or a GPS (Global Positioning System) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal Device" may also be a communication terminal, a web terminal, a music/video playing terminal, such as a PDA, an MID (Mobile Internet Device) and/or a Mobile phone with music/video playing function, or a smart tv, a set-top box, etc.
As shown in fig. 1, an embodiment of the present invention provides an automatic zooming method, which is suitable for a camera device, where the camera device is a digital camera or a mobile terminal with a camera function; which comprises the following steps:
step S110, detecting the current distance between the photographic equipment and the equipment user;
step S120, determining focal length information according to the current distance;
and step S130, generating a control signal containing the focal length information, and zooming according to the control signal.
The automatic zooming method of the invention generates a control signal containing focal length information based on the current distance by acquiring the current distance between the photographic equipment and the equipment user, and zooms according to the control signal; according to the invention, zooming is carried out by adjusting the distance between the photographic equipment and the equipment user, the equipment user does not need to operate back and forth on the screen of the photographic equipment through fingers, the zooming and composition process is automatically completed, and the movement operation is carried out without frequently changing two hands between the equipment screen and the equipment frame, so that the control complexity is reduced, the shooting convenience is improved, and the zooming time is reduced; furthermore, as the zooming is carried out, the equipment user can directly observe the screen to sense the zooming effect, and the equipment user is concentrated on the framing process without missing the shooting wonderful moment, the zooming speed and the composition quality are improved; furthermore, the mobile phone does not need to frequently move between the mobile phone screen and the mobile phone frame, so that the risk of screen breakage caused by falling of the mobile phone is reduced, and the operation experience and the imaging effect of the equipment user are improved. The following further explains the specific implementation of each step:
step S110, detecting a current distance between the photographing apparatus and the apparatus user.
Specifically, the current distance between the photographing apparatus and the apparatus user is detected by a distance sensing technique; among these, the distance sensing technology is a device that detects a physical change amount of an object by using various elements and converts the change amount into a distance to measure a distance displacement from a sensor to the object. According to different elements, the displacement sensor is divided into an optical displacement sensor, a linear proximity sensor, an ultrasonic displacement sensor and the like; the embodiment of the invention can also adopt an infrared ranging technology to detect the distance between the photographic equipment and the equipment user, when the equipment user uses the photographic equipment to take a picture, the distance between the photographic equipment and the equipment user is measured by utilizing an infrared reflection principle, and the distance between the equipment user and the photographic equipment is detected according to the principle that the infrared signals meet different reflection intensities of the equipment user.
Step S120, determining focal length information according to the current distance, specifically:
and determining the focal length information according to the current distance and the prestored maximum distance between the photographic equipment and the equipment user and combining the preset focal length range parameters of the photographic equipment.
One ideal implementation of the scheme is as follows: as shown in fig. 2, the distance D between the camera device and the device user, which is obtained by the distance sensor, is linearly mapped to the focal length range information of the lens, which includes a maximum focal length Fl corresponding to the telephoto end of the lens and a minimum focal length Fw corresponding to the wide-angle end of the lens; when D becomes smaller, the focal length becomes longer, the image moves to the telephoto end, the equipment user can see the image at the far end from the screen, on the contrary, when D becomes larger, the focal length becomes shorter, the image moves to the wide-angle end, the content of the image seen by the equipment user from the screen is more, and the design just meets the habit of observing objects by human eyes. The distance D and the focal length of the camera device and the user of the device are in an inversely proportional relationship. Assuming that the maximum sensing distance from the sensor, that is, the pre-stored maximum distance between the camera device and the device user is Dmax, the focal distance f corresponding to the current distance d between the camera device and the device user is calculated as shown in the following formula 1):
f ═ d ═ (Fl-Fw))/Dmax formula 1)
Equation 1) can be simplified to:
f ═ d × K; k ═ Fl-Fw)/Dmax formula 2)
Wherein f is focal length information, d is the current distance between the camera device and the device user, the predetermined focal length range parameter of the camera device comprises a maximum focal length Fl and a minimum focal length Fw, the maximum distance between the camera device and the device user is Dmax, and Fl, Fw and Dmax are preset fixed values of the camera device.
Preferably, an initial distance between the photographing apparatus and a user of the apparatus is detected at the time of starting the photographing apparatus;
wherein, according to the present distance, determining the focal length information comprises:
and determining the focal length information according to the current distance and the initial distance and combining the preset focal length range parameters of the photographic equipment.
Regarding the maximum distance Dmax between the camera device and the device user, in the actual usage scenario of the device user, generally, when the device user opens the camera device, the lens of the camera device is located at the maximum angle end of the lens, that is, if the device user wants to zoom, the lens can only move to the telephoto end, that is, the distance d can only become small, therefore, replacing Dmax with the initial distance Dinit between the device user and the camera device when the camera device is opened can make the effect of the camera device uniform when the camera device is opened, and the calculation process is as shown in the following formula 3):
f ═ d × K; k ═ Fl-Fw)/Dinit formula 3)
Where Dinit is the initial distance between the camera device and the device user.
Preferably, the zoom factor is determined by determining the zoom factor according to the current distance and the initial distance and by combining with the corresponding magnification factor range parameter after the predetermined focal length range parameter is subjected to mapping processing; the zoom factor calculation process is shown in the following formula 4):
s ═ d × K; k ═ si (Sl-Sw)/Dinit formula 4)
Where s is the zoom factor, and Sl and Sw are the predetermined focal length range parameter Fl and the magnification range parameter Fw of the camera device after mapping, respectively.
Preferably, the zooming method further comprises: the zoom factor is corrected by a predetermined correction coefficient. The zoom factor calculation process after correction is as shown in the following formula 5):
s ═ d × Ks; ks ═ K ═ log (a) (n), K ═ Sl-Sw)/Dinit formula 5)
Here, because the device user moves the camera device at a non-uniform speed, the amplitude is usually large at the beginning of zooming, that is, the proportional relationship between d and f is strong, and when the camera device reaches the range of the object to be focused, the adjustment is generally fine, and at this time, the proportional relationship between d and f is weak, and actually, the relationship is a relation similar to logarithm, and when d is large, that is, the distance is large, the focal length change is sensitive, and when d is small, the focal length change becomes more accurate, which not only meets the requirement of rapid zooming, but also meets the requirement of accurate zooming. At this time, K needs to be corrected, Ks is K × log (a) (n), and the values of a and n need engineering experiments and calibration.
Wherein the current distance and/or the initial distance is a straight-line distance between a screen of the photographic equipment and a face of a user of the equipment. The camera screen may be a display screen of a digital camera or a display screen of a smartphone.
And step S130, generating a control signal containing the focal length information, and zooming according to the control signal.
The embodiment of the invention zooms the photographic equipment in a digital zooming mode according to the control signal.
Preferably, if the relational models of the equations 4) and 5) are adopted, a control signal containing the zoom factor is generated, and zooming is performed according to the control signal.
Preferably, after detecting the current distance between the photographing apparatus and the apparatus user, the zooming method further comprises:
judging whether the initial distance is smaller than a minimum distance threshold value between the photographic equipment and the equipment user; if the initial distance is not smaller than the minimum distance threshold, determining focal length information according to the current distance and the initial distance and by combining the preset focal length range parameter of the photographic equipment; and if the initial distance is smaller than the minimum distance threshold value, resetting is carried out. Wherein the reset process includes: when the distance between the camera device and the device user is readjusted, the adjusted distance between the camera device and the device user is detected, and the initial distance is updated by using the adjusted distance to serve as a reference for the next zooming.
The method comprises the following specific steps:
since Dinit is randomly generated by the device user every time photographing is performed, in some cases, the distance between the device user and the photographing device when the photographing device is started is too small, resulting in that the movable distance of d is too small to complete telephoto. To solve this problem, a reset process for zooming may be adopted, that is, a reset key is reset virtually or physically by presetting on an operation interface of the camera device, that is, if the distance is too small, the reset key may be triggered after the distance is adjusted, and the adjusted distance is used as a new Dinit value as a reference for the next zooming. Further, in order to improve the continuity of zooming, the previous zoomed data may be retained when the reset is triggered for the first time, and zooming may be continued based on this distance when the reset is pressed again.
The embodiment of the invention also provides a zoom photographic device which can execute the zoom method provided by the embodiment of the invention.
As shown in fig. 3, another embodiment of the present invention provides a structure of a zoom apparatus, which is suitable for a camera device, where the camera device is a digital camera or a mobile terminal with a camera function; it includes the following modules: a current distance detection module 310, a focal length information determination module 320, and a zoom module 330.
The automatic zooming method of the invention generates a control signal containing focal length information based on the current distance by acquiring the current distance between the photographic equipment and the equipment user, and zooms according to the control signal; according to the invention, zooming is carried out by adjusting the distance between the photographic equipment and the equipment user, the equipment user does not need to operate back and forth on the screen of the photographic equipment through fingers, the zooming and composition process is automatically completed, and the movement operation is carried out without frequently changing two hands between the equipment screen and the equipment frame, so that the control complexity is reduced, the shooting convenience is improved, and the zooming time is reduced; furthermore, as the zooming is carried out, the equipment user can directly observe the screen to sense the zooming effect, and the equipment user is concentrated on the framing process without missing the shooting wonderful moment, the zooming speed and the composition quality are improved; furthermore, the mobile phone does not need to frequently move between the mobile phone screen and the mobile phone frame, so that the risk of screen breakage caused by falling of the mobile phone is reduced, and the operation experience and the imaging effect of the equipment user are improved. The following further explains the specific implementation of each step:
the current distance detection module 310 detects a current distance between the camera device and the device user.
Specifically, the current distance between the photographing apparatus and the apparatus user is detected by a distance sensing technique; among these, the distance sensing technology is a device that detects a physical change amount of an object by using various elements and converts the change amount into a distance to measure a distance displacement from a sensor to the object. According to different elements, the displacement sensor is divided into an optical displacement sensor, a linear proximity sensor, an ultrasonic displacement sensor and the like; the embodiment of the invention can also adopt an infrared ranging technology to detect the distance between the photographic equipment and the equipment user, when the equipment user uses the photographic equipment to take a picture, the distance between the photographic equipment and the equipment user is measured by utilizing an infrared reflection principle, and the distance between the equipment user and the photographic equipment is detected according to the principle that the infrared signals meet different reflection intensities of the equipment user.
The focal length information determining module 320 determines focal length information according to the current distance, specifically, according to the current distance and a pre-stored maximum distance between the camera device and the device user, and in combination with a predetermined focal length range parameter of the camera device.
One ideal implementation of the scheme is as follows: as shown in fig. 2, the distance D between the camera device and the device user, which is obtained by the distance sensor, is linearly mapped to the focal length range information of the lens, which includes a maximum focal length Fl corresponding to the telephoto end of the lens and a minimum focal length Fw corresponding to the wide-angle end of the lens; when D becomes smaller, the focal length becomes longer, the image moves to the telephoto end, the equipment user can see the image at the far end from the screen, on the contrary, when D becomes larger, the focal length becomes shorter, the image moves to the wide-angle end, the content of the image seen by the equipment user from the screen is more, and the design just meets the habit of observing objects by human eyes. The distance D and the focal length of the camera device and the user of the device are in an inversely proportional relationship. Assuming that the maximum sensing distance from the sensor, that is, the pre-stored maximum distance between the camera device and the device user is Dmax, calculating a focal length f corresponding to the current distance d between the camera device and the device user, wherein the calculation process is as shown in formula 1); equation 1) can be simplified to equation 2) above.
In the expressions 1) and 2), f is focal length information, d is a current distance between the camera device and a device user, the predetermined focal length range parameters of the camera device include a maximum focal length Fl and a minimum focal length Fw, the maximum distance between the camera device and the device user is Dmax, and Fl, Fw and Dmax are preset fixed values of the camera device.
Optionally, the zoom apparatus further includes an initial distance detection module: the initial distance detection module detects an initial distance between the photographic equipment and an equipment user when the photographic equipment is started;
the focal length information determining module 320 is specifically configured to determine the focal length information according to the current distance and the initial distance, and in combination with a predetermined focal length range parameter of the camera device.
Regarding the maximum distance Dmax between the camera device and the device user, in the actual usage scenario of the device user, generally, when the device user opens the camera device, the lens of the camera device is located at the maximum angle end of the lens, that is, if the device user wants to zoom, the lens can only move to the telephoto end, that is, the distance d can only become small, so that the initial distance Dinit between the device user and the camera device when the camera device is opened is used to replace Dmax, so that the effects of the different device users can be unified when the device users are used, and the calculation process is as shown in the above formula 3); where Dinit is the initial distance between the camera device and the device user.
Optionally, the zoom apparatus further includes a zoom factor determination module: the zoom factor determining module determines a zoom factor to determine the zoom factor according to the current distance and the initial distance and by combining with the corresponding magnification factor range parameter after the predetermined focal length range parameter is subjected to mapping processing; the zoom factor calculation process is as shown in the above formula 4); where s is the zoom factor, and Sl and Sw are the predetermined focal length range parameter Fl and the magnification range parameter Fw of the camera device after mapping, respectively.
Optionally, the zoom apparatus further includes a correction module: the correction module corrects the zoom multiple through a preset correction coefficient. The zoom factor calculation process after the correction is as shown in equation 5) above.
Here, because the device user moves the camera device at a non-uniform speed, the amplitude is usually large at the beginning of zooming, that is, the proportional relationship between d and f is strong, and when the camera device reaches the range of the object to be focused, the adjustment is generally fine, and at this time, the proportional relationship between d and f is weak, and actually, the relationship is a relation similar to logarithm, and when d is large, that is, the distance is large, the focal length change is sensitive, and when d is small, the focal length change becomes more accurate, which not only meets the requirement of rapid zooming, but also meets the requirement of accurate zooming. At this time, K needs to be corrected, Ks is K × log (a) (n), and the values of a and n need engineering experiments and calibration.
Wherein the current distance and/or the initial distance is a straight-line distance between a screen of the photographic equipment and a face of a user of the equipment. The camera screen may be a display screen of a digital camera or a display screen of a smartphone.
The zooming module 330 generates a control signal containing the focal length information and zooms according to the control signal.
The zooming module 330 in the embodiment of the invention zooms the camera device in a digital zooming manner according to the control signal.
Preferably, when the relational models of equation 4) and equation 5) are adopted, the zoom module 330 generates a control signal containing a zoom multiple, and performs zooming according to the control signal.
Preferably, after detecting the current distance between the camera device and the device user, the zoom apparatus further comprises a determining module and a resetting module:
the judging module judges whether the initial distance is smaller than a minimum distance threshold value between the photographic equipment and the equipment user; when the initial distance is not less than the minimum distance threshold, the focal length information determining module 320 determines focal length information according to the current distance and the initial distance, and in combination with a predetermined focal length range parameter of the photographing device; and when the initial distance is smaller than the minimum distance threshold value, the reset module carries out reset processing. The reset module is specifically configured to detect an adjustment distance between the camera device and the device user after the distance between the camera device and the device user is readjusted, and update the initial distance by using the adjustment distance to serve as a reference for the next zooming.
The method comprises the following specific steps:
since Dinit is randomly generated by the device user every time photographing is performed, in some cases, the distance between the device user and the photographing device when the photographing device is started is too small, resulting in that the movable distance of d is too small to complete telephoto. To solve this problem, a reset process for zooming may be adopted, that is, a reset key is reset virtually or physically by presetting on an operation interface of the camera device, that is, if the distance is too small, the reset key may be triggered after the distance is adjusted, and the adjusted distance is used as a new Dinit value as a reference for the next zooming. Further, in order to improve the continuity of zooming, the previous zoomed data may be retained when the reset is triggered for the first time, and zooming may be continued based on this distance when the reset is pressed again.
Those skilled in the art will appreciate that the invention includes apparatus relating to performing one or more of the operations herein. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices in general-purpose computers. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROMs (Read-Only memories), RAMs (Random Access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a bus. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the features specified in the block or blocks of the block diagrams and/or flowchart illustrations of the present disclosure.
Those of skill in the art will appreciate that various operations, methods, steps in the processes, acts, or solutions discussed in the present application may be alternated, modified, combined, or deleted. Further, various operations, methods, steps in the flows, which have been discussed in the present application, may be interchanged, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the various operations, methods, procedures disclosed in the prior art and the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A zooming method applicable to a photographic apparatus, comprising the steps of:
detecting the current distance between a photographic device and a device user, wherein a virtual reset key or a physical reset key preset on an operation interface of the photographic device is used for zooming, the virtual reset key or the physical reset key is triggered when the initial distance between the photographic device and the device user is smaller than a minimum distance threshold, and zooming data obtained by zooming before resetting is used for reference of next zooming after resetting;
determining focal length information according to the current distance;
generating a control signal containing focal length information, and zooming according to the control signal;
wherein the content of the first and second substances,
the determining of the focal length information according to the current distance includes: determining focal length information according to the current distance and a pre-stored maximum distance between the photographic equipment and the equipment user and by combining a preset focal length range parameter of the photographic equipment;
alternatively, the method further comprises: detecting an initial distance between the camera device and the device user upon startup of the camera device; determining the focal length information according to the current distance includes: and determining focal length information according to the current distance and the initial distance and combining preset focal length range parameters of the photographic equipment.
2. The zooming method of claim 1, wherein determining the focal length information based on the current distance and the initial distance in combination with a predetermined focal length range parameter of the photographing apparatus comprises:
determining a zoom multiple according to the current distance and the initial distance and by combining with the corresponding magnification factor range parameter after the preset focal length range parameter is subjected to mapping processing;
wherein generating a control signal containing focus information comprises:
a control signal is generated that includes a zoom factor.
3. The zooming method of claim 1, further comprising, after detecting the initial distance between the camera device and the device user:
judging whether the initial distance is smaller than a minimum distance threshold value between the photographic equipment and the equipment user;
wherein, according to the current distance and the initial distance, and in combination with the preset focal length range parameter of the camera device, determining the focal length information comprises:
and if the initial distance is not less than the minimum distance threshold, determining the focal length information according to the current distance and the initial distance and combining the preset focal length range parameters of the photographic equipment.
4. A zooming method as claimed in claim 3, characterized in that the resetting process is carried out if the initial distance is smaller than a minimum distance threshold.
5. The zooming method of claim 4, wherein the reset process comprises:
when the distance between the camera device and the device user is readjusted, the adjusted distance between the camera device and the device user is detected, and the initial distance is updated by using the adjusted distance to serve as a reference for the next zooming.
6. A zoom apparatus, comprising:
the device comprises a current distance detection module, a virtual reset key or a physical reset key, a zoom module and a zoom module, wherein the current distance detection module is used for detecting the current distance between photographic equipment and an equipment user, the virtual reset key or the physical reset key is preset on an operation interface of the photographic equipment and is used for zooming, the virtual reset key or the physical reset key is triggered when the initial distance between the photographic equipment and the equipment user is smaller than a minimum distance threshold value, and zoom data obtained by zooming before resetting is used for reference of next zooming after resetting;
the focal length information determining module is used for determining focal length information according to the current distance;
the zooming module is used for generating a control signal containing focal length information and zooming according to the control signal;
wherein the content of the first and second substances,
the focal length information determining module is specifically configured to determine focal length information according to the current distance and a pre-stored maximum distance between the camera device and the device user, and by combining a predetermined focal length range parameter of the camera device;
alternatively, the apparatus further comprises: an initial distance detection module for detecting an initial distance between the photographing apparatus and the user when the photographing apparatus is started; the focal length information determining module is specifically configured to determine focal length information according to the current distance and the initial distance, and by combining with a predetermined focal length range parameter of the camera device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610317242.2A CN107370936B (en) | 2016-05-12 | 2016-05-12 | Zoom method and zoom device |
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| CN112596324A (en) * | 2020-12-21 | 2021-04-02 | 北京航空航天大学 | Intelligent robot vision recognition system based on liquid zoom camera |
| WO2023272485A1 (en) * | 2021-06-29 | 2023-01-05 | 深圳市大疆创新科技有限公司 | Control method, image capture apparatus, and image capture system |
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| CN102404494B (en) * | 2010-09-08 | 2015-03-04 | 联想(北京)有限公司 | Electronic equipment and method for acquiring image in determined area |
| CN102420940B (en) * | 2011-11-16 | 2014-09-10 | 中兴通讯股份有限公司 | Terminal with camera shooting function and camera zooming method thereof |
| CN113568506A (en) * | 2013-01-15 | 2021-10-29 | 超级触觉资讯处理有限公司 | Dynamic user interaction for display control and customized gesture interpretation |
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| CN104506773A (en) * | 2014-12-22 | 2015-04-08 | 天津市亚安科技股份有限公司 | Camera automatic zoom control method based on human eye distance |
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