CN106454068B - A kind of method and apparatus of fast acquiring effective image - Google Patents
A kind of method and apparatus of fast acquiring effective image Download PDFInfo
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- CN106454068B CN106454068B CN201610778518.7A CN201610778518A CN106454068B CN 106454068 B CN106454068 B CN 106454068B CN 201610778518 A CN201610778518 A CN 201610778518A CN 106454068 B CN106454068 B CN 106454068B
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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
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
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Abstract
The present invention provides a kind of methods of fast acquiring effective image, which comprises receives pre-set enabled instruction, after starting camera, opens laser emitter;When detecting the laser signal that pre-set reflection point is reflected, original image is generated according to the current image content of camera;The original image is intercepted according to the position of the reflection point, generates effective image.The present invention can obtain effective image after pre-set enabled instruction starting by setting reflection point position automatically, operate it is more convenient, image interception it is high-efficient.
Description
Technical field
The invention belongs to field of image processing more particularly to a kind of method and apparatus of fast acquiring effective image.
Background technique
With the development of science and technology, being provided with camera on more and more electronic equipments.The image obtained by camera,
It can be convenient user and field data quickly and effectively acquired.For example, the camera shooting for passing through learning machine includes topic
The image of information, the text information in conjunction with character recognition tool, in available image.According to the progress of the text information of acquisition
Match, can effectively carry out topic search.
In the image of camera acquisition, the image that user needs may be a portion region.Such as in image
Text when being identified, user only needs to identify to include part item content information.Therefore, user would generally carry out image
Interception.It is usually at present the area size for selecting frame by user's adjustment for the interception way of image, user institute can be covered
The topic to be intercepted clicks confirmation key and completes screenshot after the completion of adjustment.
Since the interception needs in the prior art for image are adjusted the size for selecting frame, clicked after the completion of adjustment
Confirmation all operates, and interception process is more troublesome, and is unfavorable for improving interception efficiency.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of fast acquiring effective image, to solve the prior art for image
Interception needs the size for selecting frame is adjusted, after the completion of adjustment click confirmation all operate, interception process is more troublesome, no
The problem of conducive to interception efficiency is improved.
In a first aspect, the embodiment of the invention provides a kind of methods of fast acquiring effective image, which comprises
Pre-set enabled instruction is received, after starting camera, opens laser emitter;
It is raw according to the current image content of camera when detecting the laser signal that pre-set reflection point is reflected
At original image;
The original image is intercepted according to the position of the reflection point, generates effective image.
With reference to first aspect, in the first possible implementation of first aspect, described current according to camera
Before image content generates original image step, the method also includes:
The distance between effective image and camera are calculated according to the laser signal of the reflection;
According to the focal length of the distance adjustment camera of calculating.
The possible implementation of with reference to first aspect the first, in second of possible implementation of first aspect, institute
It states and includes: according to the laser signal of reflection calculating the distance between effective image and camera step
According to the outgoing time of laser emitter and the receiving time of the laser signal of reflection, the biography of the laser is determined
Send the time;
According to the delivery time and the light velocity, the distance between the reflection point and the camera are obtained.
The possible implementation of with reference to first aspect the first, in the third possible implementation of first aspect, institute
Stating reflection point includes the first reflection point and the second reflection point, the focal length step of the distance adjustment camera according to calculating
Specifically:
First distance between the first reflection point and camera, root is calculated according to the laser signal of the first reflection point reflection
Second distance between the first reflection point and camera is calculated according to the laser signal of the second reflection point reflection;
Focal length according to the average value of first distance and second distance as the camera.
With reference to first aspect, in the 4th kind of possible implementation of first aspect, the pre-set enabled instruction
Including one or more of preset hardware switch enabled instruction, the unlocking pattern enabled instruction, unlocked by fingerprint enabled instruction.
Second aspect, the embodiment of the invention provides a kind of device of fast acquiring effective image, described device includes:
Start unit after starting camera, opens laser emitter for receiving pre-set enabled instruction;
Original image generation unit, for when detecting the laser signal that pre-set reflection point is reflected, according to
The current image content of camera generates original image;
Effective image interception unit is generated for being intercepted according to the position of the reflection point to the original image
Effective image.
In conjunction with second aspect, in the first possible implementation of second aspect, described device further include:
Metrics calculation unit, for according to the laser signal of the reflection calculate between effective image and camera away from
From;
Focussing unit adjusts the focal length of camera for the distance according to calculating.
In conjunction with the first possible implementation of second aspect, in second of possible implementation of second aspect, institute
Stating metrics calculation unit includes:
Delivery time determines subelement, for connecing according to the laser signal of outgoing time and reflection of laser emitter
Between time receiving, the delivery time of the laser is determined;
Distance determines subelement, for obtaining the reflection point and the camera according to the delivery time and the light velocity
The distance between.
In conjunction with the first possible implementation of second aspect, in the third possible implementation of second aspect, institute
Stating reflection point includes the first reflection point and the second reflection point, and the Focussing unit is used for:
First distance between the first reflection point and camera, root is calculated according to the laser signal of the first reflection point reflection
Second distance between the first reflection point and camera is calculated according to the laser signal of the second reflection point reflection;
Focal length according to the average value of first distance and second distance as the camera.
In conjunction with second aspect, in the 4th kind of possible implementation of second aspect, the pre-set enabled instruction
Including one or more of preset hardware switch enabled instruction, the unlocking pattern enabled instruction, unlocked by fingerprint enabled instruction.
In the present invention, after starting camera by pre-set enabled instruction, laser emitter is opened, when detecting
When the laser signal that pre-set reflection point is reflected, original image, root are generated according to current image content by camera
Original image is intercepted according to the position of reflection point, generates target image.The present invention is by setting reflection point position, according to pre-
After the enabled instruction starting being first arranged, effective image can be obtained automatically, operate it is more convenient, image interception it is high-efficient.
Detailed description of the invention
Fig. 1 is the implementation flow chart of the method for the fast acquiring effective image that first embodiment of the invention provides;
Fig. 2 is the implementation flow chart of the method for the fast acquiring effective image that second embodiment of the invention provides;
Fig. 3 is the structural schematic diagram of the device for the fast acquiring effective image that third embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of method for being designed to provide fast acquiring effective image of the embodiment of the present invention, to solve the prior art pair
In the acquisition process of target area image, user is needed to carry out frame choosing on the image of shooting, after the completion of frame choosing, then clicked
Confirm key, image required for generating.This image acquisition mode needs the multiple operating procedures of user, and operates more
Trouble, so that the efficiency that target area image obtains is lower.With reference to the accompanying drawing, the present invention is further illustrated.
Embodiment one:
Fig. 1 shows the implementation process of the method for the fast acquiring effective image of first embodiment of the invention offer, is described in detail
It is as follows:
In step s101, pre-set enabled instruction is received, after starting camera, opens laser emitter.
Specifically, enabled instruction described in the embodiment of the present invention, can be the enabled instruction of hardware switch, or solution
The corresponding enabled instruction of unlock path in image is locked, or the characteristic information of fingerprint can also be preset, to unlocked by fingerprint
When an institute received fingerprint characteristic compare, when meeting matching and requiring, directly generate enabled instruction.
Hardware switch described in the embodiment of the present invention, can be to be preset for starting image interception class application program
And the special switch set.Certainly, the switch can be increased new switch in the terminal, or existing terminal
Some switch on the basis of switch is defined, the combination that can also be switched with two of existing terminal or two.
The enabled instruction, can be in standby or triggering when off-mode in terminal, or at terminal
It is triggered under other application program state of activation.When being in off-mode finally, then first triggering terminal booting, is then being switched on
The enabled instruction of described image interception class application program is handled under state.
The laser emitter, can be used for emitting the laser signal of smaller power, and laser emitter can be set
The color of the light emitted, consequently facilitating being distinguished with other light.
In step s 102, when detecting the laser signal that pre-set reflection point is reflected, worked as according to camera
Preceding image content generates original image.
Specifically, the surface of the reflection point, can be set to the material with reflective function.The reflective spot is carrying out
Effective image uses when intercepting, and therefore, the reflection point can be free-moving anchor point, can be wanted according to the use of user
Ask the setting for carrying out position.In order to improve the reliability of reflection point setting, the bottom that reflection point can be set has weaker glue
Property, the change of appearance position in use is avoided, so as to improve the precision of effective image acquisition.
The detection of the reflection point can be received and recognized by receiving the ccd sensor inside camera lens.In order to improve phase
The precision of machine identification, the reflection point are traditionally arranged to be the reflection point of scattering, and the laser emitter is to launch swashing for scattering
Light.So that camera being capable of the more structurally sound laser signal for obtaining reflection.
When camera gets the laser signal of reflection, show to include reflection point in picture that camera is currently aligned,
It can be used for determining the position of effective image according to the position of reflection point.
Due to opening laser after opening camera, the laser signal of reflection can be obtained by camera, therefore, this
Acquisition of the invention for the original image including reflection point can be completed in atomic small time content, therefore can be greatly
Improve the efficiency of image interception.
In step s 103, the original image is intercepted according to the position of the reflection point, generates effective image.
Original image can be obtained after the laser signal for receiving reflection.Due to including the position of reflection point in original image
It sets, therefore, the region of effective image can be quickly determined according to the position of reflection point, such as by two reflection points, it is true respectively
Determine initial position and the end position of effective image.
After starting camera by pre-set enabled instruction in the present invention, laser emitter is opened, it is pre- when detecting
When the laser signal that the reflection point being first arranged is reflected, original image is generated according to current image content by camera, according to
The position of reflection point intercepts original image, generates target image.The present invention is by setting reflection point position, according to preparatory
After the enabled instruction starting of setting, effective image can be obtained automatically, operate it is more convenient, image interception it is high-efficient.
Embodiment two:
Fig. 2 shows the implementation processes of the method for the fast acquiring effective image of second embodiment of the invention offer, are described in detail
It is as follows:
In step s 201, pre-set enabled instruction is received, after starting camera, opens laser emitter.
In step S202, the distance between effective image and camera are calculated according to the laser signal of the reflection.
Specifically, described calculate the distance between effective image and camera step packet according to the laser signal of the reflection
It includes:
According to the outgoing time of laser emitter and the receiving time of the laser signal of reflection, the biography of the laser is determined
Send the time;
According to the delivery time and the light velocity, the distance between the reflection point and the camera are obtained.
The time point and camera for recording the laser emitter opening obtained by the time of the laser signal reflected
Point, two time points, which are made difference, can be obtained the time of laser signal propagation.Including laser signal is mapped to from laser emitter
The time on reflection point surface, and reflex to by the reflection point time of camera.This two sections apart from the corresponding time substantially
Identical, therefore, the distance of calculating can be the half of total distance.
For example the time point of Laser emission is t1, detects that the time point of the laser signal of reflection is t2, the propagation speed of light
Degree is v, then, the distance between the reflection point and the camera are (t2-t1) * v/2.
In embodiments of the present invention, when the reflection point includes the first reflection point and the second reflection point, and two reflections
When the distance difference of point is larger, the focal length step of the distance adjustment camera according to calculating specifically:
First distance between the first reflection point and camera, root is calculated according to the laser signal of the first reflection point reflection
Second distance between the first reflection point and camera is calculated according to the laser signal of the second reflection point reflection;
Focal length according to the average value of first distance and second distance as the camera.
The focal length is determined by average distance, and the effective image being more clear can be generated.
In step S203, according to the focal length of the distance adjustment camera of calculating.
In step S204, when detecting the laser signal that pre-set reflection point is reflected, worked as according to camera
Preceding image content generates original image
In step S205, the original image is intercepted according to the position of the reflection point, generates effective image.
The embodiment of the present invention on the basis of example 1, further according to the distance between reflection point and camera to taking the photograph
As head is focused, so that the clarity of the effective image part in original image is higher, be conducive to improve effective
The quality of image.
Embodiment three:
Fig. 3 is the structural schematic diagram of the device of fast acquiring effective image provided in an embodiment of the present invention, and details are as follows:
The device of fast acquiring effective image described in the embodiment of the present invention, comprising:
Start unit 301 after starting camera, opens laser emitter for receiving pre-set enabled instruction;
Original image generation unit 302, for when detecting the laser signal that pre-set reflection point is reflected, root
Original image is generated according to the current image content of camera;
Effective image interception unit 303, it is raw for being intercepted according to the position of the reflection point to the original image
At effective image.
Preferably, described device further include:
Metrics calculation unit, for according to the laser signal of the reflection calculate between effective image and camera away from
From;
Focussing unit adjusts the focal length of camera for the distance according to calculating.
Preferably, the metrics calculation unit includes:
Delivery time determines subelement, for connecing according to the laser signal of outgoing time and reflection of laser emitter
Between time receiving, the delivery time of the laser is determined;
Distance determines subelement, for obtaining the reflection point and the camera according to the delivery time and the light velocity
The distance between.
Preferably, the reflection point includes the first reflection point and the second reflection point, and the Focussing unit is used for:
First distance between the first reflection point and camera, root is calculated according to the laser signal of the first reflection point reflection
Second distance between the first reflection point and camera is calculated according to the laser signal of the second reflection point reflection;
Focal length according to the average value of first distance and second distance as the camera.
Preferably, the pre-set enabled instruction includes preset hardware switch enabled instruction, the unlocking pattern starting
One or more of instruction, unlocked by fingerprint enabled instruction.
The device of fast acquiring effective image described in the embodiment of the present invention, it is effective with the fast acquiring of embodiment one to two
The method of image is corresponding, so here is no more repetition.
In several embodiments provided by the present invention, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or logical of device or unit
Letter connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory),
Random access memory (RAM, Random Access Memory), magnetic or disk etc. be various to can store program code
Medium.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of method of fast acquiring effective image, which is characterized in that the described method includes:
Pre-set enabled instruction is received, after starting camera, opens laser emitter;
When detecting the laser signal that pre-set reflection point is reflected, generated according to the current image content of camera former
Beginning image;Wherein, the surface of the reflection point is the material with reflective function, and the bottom of reflection point has weaker glue
Property;
The original image is intercepted according to the position of the reflection point, generates effective image.
2. method according to claim 1, which is characterized in that generated in the image content current according to camera original
Before image step, the method also includes:
The distance between effective image and camera are calculated according to the laser signal of the reflection;
According to the focal length of the distance adjustment camera of calculating.
3. method according to claim 2, which is characterized in that described to calculate effective image according to the laser signal of the reflection
The distance between camera step includes:
According to the outgoing time of laser emitter and the receiving time of the laser signal of reflection, when determining the transmission of the laser
Between;
According to the delivery time and the light velocity, the distance between the reflection point and the camera are obtained.
4. method according to claim 2, which is characterized in that the reflection point includes the first reflection point and the second reflection point,
The focal length step of the distance adjustment camera according to calculating specifically:
First distance between the first reflection point and camera is calculated according to the laser signal of the first reflection point reflection, according to the
Second distance between the first reflection point and camera is calculated in the laser signal of two reflection point reflections;
Focal length according to the average value of first distance and second distance as the camera.
5. method according to claim 1, which is characterized in that the pre-set enabled instruction includes that preset hardware is opened
Close one or more of enabled instruction, the unlocking pattern enabled instruction, unlocked by fingerprint enabled instruction.
6. a kind of device of fast acquiring effective image, which is characterized in that described device includes:
Start unit after starting camera, opens laser emitter for receiving pre-set enabled instruction;
Original image generation unit, for when detecting the laser signal that pre-set reflection point is reflected, according to camera shooting
Current image content generates original image;Wherein, the surface of the reflection point is the material with reflective function, and is reflected
The bottom of point has weaker viscosity;
Effective image interception unit generates effective for being intercepted according to the position of the reflection point to the original image
Image.
7. device according to claim 6, which is characterized in that described device further include:
Metrics calculation unit, for calculating the distance between effective image and camera according to the laser signal of the reflection;
Focussing unit adjusts the focal length of camera for the distance according to calculating.
8. device according to claim 7, which is characterized in that the metrics calculation unit includes:
Delivery time determines subelement, for according to laser emitter outgoing the time and reflection laser signal reception when
Between, determine the delivery time of the laser;
Distance determines subelement, for obtaining between the reflection point and the camera according to the delivery time and the light velocity
Distance.
9. device according to claim 7, which is characterized in that the reflection point includes the first reflection point and the second reflection point,
The Focussing unit is used for:
First distance between the first reflection point and camera is calculated according to the laser signal of the first reflection point reflection, according to the
Second distance between the first reflection point and camera is calculated in the laser signal of two reflection point reflections;
Focal length according to the average value of first distance and second distance as the camera.
10. device according to claim 6, which is characterized in that the pre-set enabled instruction includes preset hardware
Switch one or more of enabled instruction, the unlocking pattern enabled instruction, unlocked by fingerprint enabled instruction.
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