CN106412435A - Focusing method and apparatus, and mobile terminal - Google Patents
Focusing method and apparatus, and mobile terminal Download PDFInfo
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- CN106412435A CN106412435A CN201610890577.3A CN201610890577A CN106412435A CN 106412435 A CN106412435 A CN 106412435A CN 201610890577 A CN201610890577 A CN 201610890577A CN 106412435 A CN106412435 A CN 106412435A
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- numerical value
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- frame image
- focus numerical
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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
Abstract
The invention discloses a focusing method and apparatus, and a mobile terminal. The method comprises the following steps: opening phase focusing, and recording a defocusing numerical value of each frame of image in a focusing process; determining abnormal numerical values in the defocusing numerical values; screening the abnormal numerical values; and focusing according to the defocusing numerical values with the abnormal numerical values screened. By adoption of the method, the stability of the defocusing numerical values can be guaranteed, and thus the accuracy of phase focusing is ensured.
Description
Technical field
The present invention relates to image and optical technical field, more particularly, to a kind of focusing method, device and mobile terminal.
Background technology
With the development of terminal unit, user is to the terminal unit such as camera function such as mobile phone, camera using more and more wider
General.Clearly picture just can be taken to defocused when taking pictures.At present, in focusing technology, phase place focusing has focusing speed because of it
Fast feature, is widely used.During phase place focusing, phase contrast gradually tends to be bordering on 0, corresponding out of focus number
Value also gradually tends to be bordering on 0, moves to focal position at leisure, thus realizing focusing.
But, during phase place focusing, if the shadow of acquisition phase is subject to hot-tempered point, extraneous light unstable etc. factor
Ring, the phase-detection data of output can be made unstable.Thus, lead to out of focus numerical value that saltus step occurs, cause picture to shake back and forth, enter
And affect the accuracy focused.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this reason, the present invention
First purpose is to propose a kind of focusing method, and the method ensure that out of focus numerical stability, thus ensureing phase place pair
Burnt accuracy.
Second object of the present invention is to propose a kind of focusing mechanism.
Third object of the present invention is to propose a kind of mobile terminal.
To achieve these goals, the focusing method of first aspect present invention embodiment, including open phase focusing, and remembers
The out of focus numerical value of each two field picture in record focus process；Determine the abnormal numerical value in out of focus numerical value；Screen out abnormal numerical value；And root
Focused according to screening out the out of focus numerical value after abnormal numerical value.
The focusing method of the embodiment of the present invention, first turns on phase place focusing, and records each two field picture in focus process
Out of focus numerical value, it is then determined that abnormal numerical value in out of focus numerical value screen out abnormal data value, finally according to screening out after abnormal numerical value
Out of focus numerical value focused.The method ensure that out of focus numerical stability, thus ensureing the accuracy of phase place focusing.
In addition, the brush machine method of the embodiment of the present invention, also there is the technical characteristic adding as follows：
In one embodiment of the invention, record the out of focus numerical value of each two field picture in focus process, including：Detection is every
The phase-detection value of one two field picture；Out of focus numerical value is calculated according to phase-detection value.
In one embodiment of the invention, determine the abnormal numerical value in out of focus numerical value, including：Obtain current frame image
Out of focus numerical value；The out of focus numerical value of the out of focus numerical value of current frame image and previous frame image is compared；If current frame image
Out of focus numerical value be more than the out of focus numerical value of previous frame image it is determined that the out of focus numerical value of current frame image is abnormal numerical value.
In one embodiment of the invention, also include：If the out of focus numerical value of current frame image is less than previous frame image
Out of focus numerical value it is determined that current frame image out of focus numerical value be regime values；Focused according to regime values.
In one embodiment of the invention, also include：Determine current frame image out of focus numerical value be regime values it
Afterwards, update the out of focus numerical value of current frame image.
In one embodiment of the invention, update the out of focus numerical value of current frame image, including：Calculate current frame image
The meansigma methodss of the out of focus numerical value of out of focus numerical value and previous frame image, using the out of focus number of the current frame image as after update for the meansigma methodss
Value.
In one embodiment of the present of invention, after being additionally included in the out of focus numerical value updating current frame image, after updating
The out of focus numerical value of current frame image focused.
For reaching above-mentioned purpose, the focusing mechanism of second aspect present invention embodiment, including logging modle, for open phase
Focusing, and record the out of focus numerical value of each two field picture in focus process；Determining module, for determining the abnormal number in out of focus numerical value
Value；Screen out module, be used for screening out abnormal numerical value；And Focusing module, screen out the out of focus numerical value after abnormal numerical value for basis and enter
Row focusing.
The focusing mechanism of the embodiment of the present invention, first turns on phase place focusing, and records each two field picture in focus process
Out of focus numerical value, it is then determined that abnormal numerical value in out of focus numerical value screen out abnormal data value, finally according to screening out after abnormal numerical value
Out of focus numerical value focused.The method ensure that out of focus numerical stability, thus ensureing the accuracy of phase place focusing.
In addition, the focusing mechanism of the embodiment of the present invention, also there is the technical characteristic adding as follows：
In one embodiment of the invention, logging modle, including：Detector unit, for detecting the phase of each two field picture
Position detected value；Computing unit, for calculating out of focus numerical value according to phase-detection value.
In one embodiment of the invention, determining module, is used for：Obtain the out of focus numerical value of current frame image；Will be current
The out of focus numerical value of two field picture is compared with the out of focus numerical value of previous frame image；If the out of focus numerical value of current frame image is more than front
The out of focus numerical value of one two field picture is it is determined that the out of focus numerical value of current frame image is abnormal numerical value.
In one embodiment of the invention, determining module, is additionally operable to：If the out of focus numerical value of current frame image is less than front
The out of focus numerical value of one two field picture is it is determined that the out of focus numerical value of current frame image is regime values；Focusing module, for according to normal
Numerical value is focused.
In one embodiment of the invention, also include update module, in the out of focus numerical value determining current frame image
After regime values, update the out of focus numerical value of current frame image.
In one embodiment of the invention, update module, for calculating out of focus numerical value and the former frame of current frame image
The meansigma methodss of the out of focus numerical value of image, using the out of focus numerical value of the current frame image as after update for the meansigma methodss.
In one embodiment of the invention, Focusing module, is additionally operable to：Update current frame image out of focus numerical value it
Afterwards, focused according to the out of focus numerical value of the current frame image after updating.
For reaching above-mentioned purpose, the mobile terminal of third aspect present invention embodiment, including：Housing, power circuit, circuit
Plate, processor and memorizer, wherein, circuit board is placed in the interior volume that housing surrounds, and processor and memorizer are arranged on electricity
On the plate of road；Power circuit, for being each circuit of terminal unit or device is powered；Memorizer is used for storing executable program generation
Code；Processor runs journey corresponding with executable program code by reading the executable program code of storage in memorizer
Sequence, for executing following steps：
Open phase is focused, and records the out of focus numerical value of each two field picture in focus process；
Determine the abnormal numerical value in out of focus numerical value；
Screen out abnormal numerical value；And
Focused according to screening out the out of focus numerical value after abnormal numerical value.
The mobile terminal of the embodiment of the present invention, first turns on phase place focusing, and records each two field picture in focus process
Out of focus numerical value, it is then determined that abnormal numerical value in out of focus numerical value screen out abnormal data value, finally according to screening out after abnormal numerical value
Out of focus numerical value focused.The method ensure that out of focus numerical stability, thus ensureing the accuracy of phase place focusing.
The aspect that the present invention adds and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
Fig. 1 is the flow chart of focusing method according to an embodiment of the invention；
Fig. 2 is the flow chart of the focusing method according to one specific embodiment of the present invention；
Fig. 3 is the structural representation of focusing mechanism according to an embodiment of the invention；
Fig. 4 is the structural representation of the focusing mechanism according to one specific embodiment of the present invention；
Fig. 5 is the structural representation of mobile terminal according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings focusing method, device and the mobile terminal of the embodiment of the present invention are described.
Fig. 1 is the flow chart of focusing method according to an embodiment of the invention.
As shown in figure 1, focusing method may include：
S101, open phase is focused, and records the out of focus numerical value of each two field picture in focus process.
Specifically it is assumed that user travels at certain sight spot, quasi- spare mobile phone takes an ancient building thing, and at this moment user opens handss
Photographing unit in machine, captures after building with photographic head, and open phase is focused.It should be noted that in addition to mobile phone, user
Also can have the photographing device of phase place focus function using other, this is not construed as limiting.
In open phase to defocused, the image found a view in picture can be detected, detect the phase place of each two field picture
Detected value.Then, calculate the out of focus numerical value of each two field picture according to the phase-detection value of each two field picture, and record each
The out of focus numerical value of two field picture.It should be noted that out of focus numerical value is calculated using prior art, here is omitted.
Wherein, out of focus numerical value represents the burnt position of clutch.Out of focus numerical value is less, represents that the burnt position of clutch is nearer.When from
Burnt numerical value level off to 0 when, represent and be in the position of focus, that is, complete to focus.
S102, determines the abnormal numerical value in out of focus numerical value.
Specifically, the out of focus numerical value according to record obtains the out of focus numerical value of current frame image.Obtaining current frame image
After out of focus numerical value, the out of focus numerical value of the out of focus numerical value of current frame image and previous frame image is compared, current to determine
Whether the out of focus numerical value of two field picture is abnormal numerical value.
If the out of focus numerical value of current frame image be more than previous frame image out of focus numerical value it is determined that current frame image from
Burnt numerical value is abnormal numerical value.Specific example is as follows：The out of focus numerical value of the current frame image that a certain moment obtains is 80, former frame figure
The out of focus numerical value of picture is 50.At this moment, the out of focus numerical value 80 of current frame image is more than the out of focus numerical value 50 of previous frame image.Due to
In phase place focus process, may by sensor noise or extraneous light be unstable etc., factor is affected, lead to current frame image
Phase-detection value increase suddenly, and then lead to the out of focus numerical value of current frame image to be sent out with respect to the out of focus numerical value of previous frame image
Give birth to mutation.Therefore, the out of focus numerical value of current frame image is defined as abnormal numerical value.
If the out of focus numerical value of current frame image be less than previous frame image out of focus numerical value it is determined that current frame image from
Burnt numerical value is regime values.Specific example is as follows：The out of focus numerical value of the current frame image that a certain moment obtains is 60, former frame figure
The out of focus numerical value of picture is 70.Because the out of focus numerical value 60 of current frame image is less than the out of focus numerical value 70 of previous frame image.Therefore,
The out of focus numerical value of current frame image is defined as regime values.
S103, screens out abnormal numerical value.
Specifically, if the out of focus numerical value of current frame image is abnormal numerical value, screen out the out of focus numerical value of current frame image.
If it should be noted that the out of focus numerical value of current frame image is abnormal numerical value, after screening out this abnormal numerical value,
Focus operation will not be carried out according to this abnormal numerical value, but the out of focus numerical value of next two field picture of direct access.Obtaining next frame
After the out of focus numerical value of image, by the former frame figure of the out of focus numerical value of next two field picture obtaining and the current frame image being screened out
Whether the out of focus numerical value of picture is compared, be abnormal numerical value with the out of focus numerical value that determines next two field picture.If next two field picture
Out of focus numerical value be abnormal numerical value, then screen out the out of focus numerical value of next two field picture.Specific example is as follows：
The out of focus numerical value of the current frame image that a certain moment obtains is 60, and the out of focus numerical value of previous frame image is 50.Due to,
The out of focus numerical value 60 of current frame image is more than the out of focus numerical value 50 of previous frame image, then can determine the out of focus number of current frame image
It is worth for abnormal numerical value.Therefore, screen out the out of focus numerical value 60 of current frame image.Next, obtaining the out of focus numerical value of next two field picture,
And the out of focus numerical value of next two field picture obtaining is compared with the out of focus numerical value 50 of previous frame image, to determine next frame figure
Whether the out of focus numerical value of picture is abnormal numerical value.If the out of focus numerical value of next two field picture is abnormal numerical value, screen out next frame figure
The out of focus numerical value of picture.
S104, is focused according to screening out the out of focus numerical value after abnormal numerical value.
Specifically, if the out of focus numerical value of current frame image is regime values, according to the out of focus numerical value of current frame image
Focused.
If it should be noted that the out of focus numerical value of current frame image is regime values, according to the out of focus of current frame image
Numerical value carries out, to defocused, continuing to judge whether the out of focus numerical value of next two field picture is abnormal numerical value, until completing focus process.Tool
Body example is as follows：
It is assumed that entering in line phase focus process to heritage buildings, the out of focus of the first two field picture of the heritage buildings of record
Numerical value is 100, and the out of focus numerical value of the second two field picture is 90, and the out of focus numerical value of the 3rd two field picture is 102, the out of focus of the 4th two field picture
Numerical value is 80, and the out of focus numerical value of the 5th two field picture is 75, and the out of focus numerical value of the 6th two field picture is 80, the out of focus number of the 7th two field picture
It is worth for 70, the out of focus numerical value of the 8th two field picture is 60.
First, the out of focus numerical value of the out of focus numerical value of the first two field picture and the second two field picture is compared.Due to the second frame
The out of focus numerical value 90 of image is less than the out of focus numerical value 100 of the first two field picture, and the out of focus numerical value of the therefore second two field picture is normal number
Value.After the out of focus numerical value determining the second two field picture is regime values, the out of focus numerical value of the out of focus numerical value according to the second two field picture
90 are focused.
Next, obtaining the out of focus numerical value of the 3rd two field picture.Because the out of focus numerical value of, the 3rd two field picture is 102 to be more than the
The out of focus numerical value 90 of two two field pictures.Accordingly, it can be determined that the out of focus numerical value of the 3rd two field picture is abnormal numerical value and screens out the 3rd frame figure
The out of focus numerical value 102 of picture.
After screening out the out of focus numerical value of the 3rd two field picture, focus operation, direct access are not carried out according to this abnormal numerical value
The out of focus numerical value of the 4th two field picture.At this moment, by the out of focus numerical value 80 of the 4th two field picture obtaining and the out of focus number of the second two field picture
Value 90 is compared it may be determined that the out of focus numerical value 80 of the 4th two field picture is regime values.In the out of focus number determining the 4th two field picture
After being worth for regime values, focused according to the out of focus numerical value 80 of the 4th two field picture.After focusing, obtain the 5th two field picture from
Burnt numerical value.
Can be drawn according to above-mentioned steps, the out of focus numerical value 75 of ensuing 5th two field picture is regime values, the 6th frame
The out of focus numerical value 80 of image is screened out, and the out of focus numerical value 70 of the 7th two field picture is regime values, the out of focus numerical value of the 8th two field picture
60 is regime values.
From said process, the focusing to heritage buildings is in the out of focus numerical value screening out the 3rd two field picture and six two field pictures
Out of focus numerical value after, according to the out of focus numerical value 100 of the first two field picture, the out of focus numerical value 90 of the second two field picture, the 4th frame figure from
Burnt numerical value 80, the out of focus numerical value 75 of the 5th two field picture, the out of focus numerical value 70 of the 7th two field picture, the out of focus numerical value 60 of the 8th two field picture
Focused.Due to screening out after abnormal numerical value, it is gradually lowered from the out of focus of the first two field picture to the out of focus numerical value of the 8th two field picture.
Therefore, according to screening out the out of focus numerical value of the first two field picture after abnormal numerical value, the out of focus numerical value of the second two field picture, the 4th frame figure
Out of focus numerical value, the out of focus numerical value of the 5th two field picture, the out of focus numerical value of the 7th two field picture, that the out of focus numerical value of the 8th two field picture is carried out is right
Jiao, improves the stability of focusing so that tending to clear when focus process will not lead to because of there is abnormal numerical value, when and become
In fuzzy.
Say from whole focus process, the focusing method of the embodiment of the present invention is to control photographic head according to screening out after abnormal numerical value
Out of focus numerical value focused.That is, being focused according to all regime values.Due to screen out after abnormal numerical value from
Burnt numerical value is gradually lowered and levels off to 0, is finally completed focusing.Thus it is guaranteed that the accuracy of focusing.
The focusing method of the embodiment of the present invention, first turns on phase place focusing, and records each two field picture in focus process
Out of focus numerical value, it is then determined that abnormal numerical value in out of focus numerical value screen out abnormal numerical value, and according to normal number in focus process
Value is focused.The method ensure that out of focus numerical stability, thus ensureing the accuracy of phase place focusing.
Fig. 2 is the flow chart of the focusing method according to one specific embodiment of the present invention.
As shown in Fig. 2 focusing method may include：
S201, open phase is focused, and records the out of focus numerical value of each two field picture in focus process.
Specifically it is assumed that user travels at certain sight spot, quasi- spare mobile phone takes an ancient building, and at this moment user opens mobile phone
In photographing unit, capture after building with photographic head, open phase focus.It should be noted that in addition to mobile phone, Yong Huye
Can have the photographing device of phase place focus function using other, this is not construed as limiting.
After open phase is focused, the image found a view in picture can be detected, detect the phase of each two field picture
Position detected value.Then, calculate the out of focus numerical value of each two field picture according to phase-detection value, and record each two field picture from
Burnt numerical value.It should be noted that out of focus numerical value is calculated using prior art, here is omitted.
Wherein, out of focus numerical value represents the burnt position of clutch.Out of focus numerical value is less, represents that the burnt position of clutch is nearer.When from
Burnt numerical value level off to 0 when, represent and be in the position of focus, that is, complete to focus.
S202, judges whether out of focus numerical value is abnormal numerical value.
Specifically, the out of focus numerical value according to record obtains the out of focus numerical value of current frame image.Obtaining current frame image
After out of focus numerical value, the out of focus numerical value of the out of focus numerical value of current frame image and previous frame image is compared, current to determine
Whether the out of focus numerical value of two field picture is abnormal numerical value.
S203, if out of focus numerical value is abnormal numerical value, screens out abnormal numerical value.
Specifically, if the out of focus numerical value of current frame image is more than the out of focus numerical value of previous frame image it may be determined that current
The out of focus numerical value of two field picture is abnormal numerical value.Specific example is as follows：The out of focus numerical value of the current frame image that some moment obtains
It is 80, the out of focus numerical value of previous frame image is 50.At this moment, the out of focus numerical value 80 of current frame image is more than the out of focus of previous frame image
Numerical value 50.Due to, in phase place focus process, may being affected by the noise of sensor or extraneous unstable factor etc., being led to
The phase-detection value of current frame image increases suddenly, and then leads to the out of focus numerical value of current frame image with respect to previous frame image
Out of focus numerical value there occurs mutation.Therefore, the out of focus numerical value of current frame image is defined as abnormal numerical value.
If it should be noted that the out of focus numerical value of current frame image is abnormal numerical value, after screening out this abnormal numerical value, no
Focus operation can be carried out according to this abnormal numerical value, but the out of focus numerical value of next two field picture of direct access.Obtaining next frame figure
After the out of focus numerical value of picture, by the previous frame image of the out of focus numerical value of next two field picture obtaining and the current frame image being screened out
Out of focus numerical value be compared, whether be abnormal numerical value with the out of focus numerical value that determines next two field picture.If next two field picture
Out of focus numerical value is abnormal numerical value, then screen out the out of focus numerical value of next two field picture.Specific example is as follows：
The out of focus numerical value of the current frame image that a certain moment obtains is 60, and the out of focus numerical value of previous frame image is 50.Due to,
The out of focus numerical value 60 of current frame image is more than the out of focus numerical value 50 of previous frame image, then the out of focus numerical value of current frame image is abnormal
Numerical value.Therefore, screen out the out of focus numerical value 60 of current frame image.Next, obtaining the out of focus numerical value of next two field picture, and will obtain
The out of focus numerical value of next two field picture be compared with the out of focus numerical value 50 of previous frame image, to determine the out of focus of next two field picture
Whether numerical value is abnormal numerical value.If the out of focus numerical value of next two field picture is abnormal numerical value, screen out the out of focus of next two field picture
Numerical value.
S204, if out of focus numerical value is not abnormal numerical value it is determined that being regime values, and updates out of focus numerical value.
Specifically, if the out of focus numerical value of current frame image is less than the out of focus numerical value of previous frame image it may be determined that current
The out of focus numerical value of two field picture is regime values.After the out of focus numerical value determining current frame image is regime values, update current
The out of focus numerical value of two field picture.
More specifically, determine current frame image out of focus numerical value be regime values after, calculate current frame image from
The meansigma methodss of the out of focus numerical value of burnt numerical value and previous frame image, using the out of focus numerical value of the present image as after update for the meansigma methodss.
Specific example is as follows：The out of focus numerical value of the current frame image that a certain moment obtains is 60, and the out of focus numerical value of previous frame image is 80.
Due to the out of focus numerical value 60 of, current frame image be less than previous frame image out of focus numerical value 80 it may be determined that current frame image from
Burnt numerical value 60 is regime values.
After the out of focus numerical value 60 determining current frame image is regime values, update the out of focus numerical value of current frame image.First
First, calculate out of focus numerical value 60 and the meansigma methodss of the out of focus numerical value 80 of previous frame image of current frame image, be calculated meansigma methodss
For 70.Then, using the out of focus numerical value of meansigma methodss 70 current frame image as after update, that is, the out of focus numerical value of current frame image updates
For 70.
S205, is focused according to the out of focus numerical value after updating.
Specifically, if the out of focus numerical value of current frame image is regime values, in the out of focus numerical value updating current frame image
Afterwards, focused according to the out of focus numerical value of the current frame image after updating.
It should be noted that carrying out, to defocused, continuing under judgement according to the out of focus numerical value of the current frame image after updating
Whether the out of focus numerical value of one two field picture is abnormal numerical value.Repeat step S202 to S205, until complete focus process.Specific example
As follows：
It is assumed that heritage buildings are entered line phase focusing during, the first two field picture of the heritage buildings of record from
Burnt numerical value is 100, and the out of focus numerical value of the second two field picture is 90, and the out of focus numerical value of the 3rd two field picture is 102, the 4th two field picture from
Burnt numerical value is 80, and the out of focus numerical value of the 5th two field picture is 75, and the out of focus numerical value of the 6th two field picture is 80.
First, obtain the out of focus numerical value of the second two field picture.Because the out of focus numerical value 90 of the second two field picture is less than the first frame figure
The out of focus numerical value 100 of picture, the out of focus numerical value of the therefore second two field picture is regime values.In the out of focus numerical value determining the second two field picture
After regime values, calculate the out of focus numerical value 90 of the second two field picture and the meansigma methodss of the out of focus numerical value 100 of the first two field picture.In root
After the out of focus numerical value of the out of focus numerical value updating the second two field picture according to meansigma methodss 95, according to the second two field picture out of focus numerical value after updating
95 are focused.
Next, obtaining the out of focus numerical value of the 3rd two field picture.Because the out of focus numerical value of, the 3rd two field picture is 102 to be more than the
The out of focus numerical value 95 of two two field pictures.Accordingly, it can be determined that the out of focus numerical value of the 3rd two field picture is abnormal numerical value and screens out the 3rd frame figure
The out of focus numerical value 102 of picture.
After screening out the out of focus numerical value of the 3rd two field picture, do not focused according to this abnormal numerical value, direct access the 4th
The out of focus numerical value of two field picture.At this moment, by the out of focus numerical value 80 of the 4th two field picture obtaining and the out of focus numerical value 95 of the second two field picture
It is compared it may be determined that the out of focus numerical value 80 of the 4th two field picture is regime values.In the out of focus numerical value determining the 4th two field picture it is
After regime values, calculate the out of focus numerical value 80 of the 4th two field picture and the meansigma methodss of the out of focus numerical value 95 of the second two field picture.In basis
After meansigma methodss 87.5 update the out of focus numerical value of the 4th two field picture, carried out according to the out of focus numerical value 87.5 of the 4th two field picture after updating
Focusing.After focusing, obtain the out of focus numerical value of the 5th two field picture.
Can be drawn according to above-mentioned steps, the out of focus numerical value of ensuing 5th two field picture is regime values, after renewal
The out of focus numerical value of the 5th two field picture is 81.25；The out of focus numerical value of the 6th two field picture is regime values, the figure of the 6th frame after renewal
The out of focus numerical value of picture is 80.625.
Therefore, be after the out of focus numerical value screening out the 3rd two field picture to the focusing of ancient building, according to the first two field picture from
Burnt numerical value 100, update after the out of focus numerical value 95 of the second two field picture, update after the out of focus numerical value 87.5 of the 4th two field picture, more
After the out of focus numerical value 81.25 of the 5th two field picture after new and renewal, the out of focus numerical value 80.625 of the 6th two field picture is focused.
Due to, after screening out the out of focus numerical value of the 3rd two field picture, the out of focus numerical value of the out of focus numerical value of the first two field picture to the 6th two field picture by
Reduce.Therefore, the out of focus number according to the second two field picture after screening out the out of focus numerical value of the first two field picture after abnormal numerical value, updating
The 6th frame figure after the out of focus numerical value of the 5th two field picture after the out of focus numerical value of the 4th two field picture after value, renewal, renewal, renewal
The out of focus numerical value of picture is focused, and improves the stability of focusing so that focus process will not lead to because of there is abnormal numerical value
When and tend to clear, when and tend to fuzzy.
Say from whole focus process, the focusing method of the embodiment of the present invention is to control photographic head according to screening out after abnormal numerical value
Out of focus numerical value focused.That is, being focused according to the out of focus numerical value after all renewal.Due to screening out abnormal numerical value
Out of focus numerical value after renewal afterwards is gradually lowered and levels off to 0, is finally completed focusing.Thus it is guaranteed that the accuracy of focusing.
The focusing method of the embodiment of the present invention, screens out different constant value, updates the out of focus numerical value being confirmed as regime values,
And focused according to the out of focus numerical value after updating, make out of focus numerical value smoother and stable, further ensure phase place focusing
Accuracy.
In order to realize above-described embodiment, the invention allows for a kind of focusing mechanism, Fig. 3 is according to one enforcement of the present invention
The structural representation of the focusing mechanism of example.
As shown in figure 3, focusing mechanism includes：Logging modle 310, determining module 320, screen out module 330, Focusing module
340.
Logging modle 310, for open phase focusing, and records the out of focus numerical value of each two field picture in focus process.Note
Record module 310 includes detector unit 311 and computing unit 312.
Detector unit 311, for detecting the phase-detection value of each two field picture.
Computing unit 312, for calculating out of focus numerical value according to phase-detection value.
Specifically it is assumed that user travels at certain sight spot, quasi- spare mobile phone takes an ancient building, and at this moment user opens mobile phone
In photographing unit, capture after building with photographic head, logging modle 310 open phase focus.It should be noted that except handss
Outside machine, user also can have the photographing device of phase place focus function using other, and this is not construed as limiting.
In logging modle 310 open phase to defocused, detector unit 311 can detect to the image found a view in picture,
Detect the phase-detection value of each two field picture.Then, computing unit 312 calculates each two field picture according to phase-detection value
Out of focus numerical value, logging modle 310 records the out of focus numerical value of each two field picture.It should be noted that out of focus numerical value is using existing
Technology is had to calculate, here is omitted.
Wherein, out of focus numerical value represents the burnt position of clutch.Out of focus numerical value is less, represents that the burnt position of clutch is nearer.When from
Burnt numerical value level off to 0 when, represent and be in the position of focus, that is, complete to focus.
Determining module 320, for determining the abnormal numerical value in out of focus numerical value.
Specifically, it is determined that module 320 obtains the out of focus numerical value of current frame image according to the out of focus numerical value of record.Determining mould
After block 320 obtains the out of focus numerical value of current frame image, by the out of focus number of the out of focus numerical value of current frame image and previous frame image
Whether value is compared, be abnormal numerical value with the out of focus numerical value that determines current frame image.
If the out of focus numerical value of current frame image is more than the out of focus numerical value of previous frame image it is determined that module 320 determination is worked as
The out of focus numerical value of prior image frame is abnormal numerical value.Specific example is as follows：The out of focus numerical value of the current frame image that a certain moment obtains
It is 80, the out of focus numerical value of previous frame image is 50.At this moment, the out of focus numerical value 80 of present image is more than the out of focus number of previous frame image
Value 50.Due in phase place focus process, may by the noise of sensor or extraneous light be unstable etc., factor is affected, lead
The phase-detection value causing current frame image increases suddenly, and then leads to the out of focus numerical value of current frame image with respect to previous frame image
Out of focus numerical value there occurs mutation.Accordingly, it is determined that the out of focus numerical value of current frame image is defined as abnormal numerical value by module 320.
If the out of focus numerical value of current frame image is less than the out of focus numerical value of previous frame image it is determined that module 320 determination is worked as
The out of focus numerical value of prior image frame is regime values.Specific example is as follows：The out of focus number of the current frame image that some moment obtains
Value is 60, and the out of focus numerical value of previous frame image is 70.Due to the out of focus numerical value 60 of, current frame image be less than previous frame image from
Burnt numerical value 70.Accordingly, it is determined that the out of focus numerical value 60 of current frame image is defined as regime values by module 320.
Screen out module 330, be used for screening out abnormal numerical value.
Specifically if it is determined that module 320 determines that the out of focus numerical value of current frame image is abnormal numerical value, then screening module
The 330 out of focus numerical value screening out current frame image.
If it should be noted that the out of focus numerical value of current frame image is abnormal numerical value, screening out module 330, to screen out this different
After regular data value, the out of focus numerical value of determining module 320 next two field picture of direct access.Obtain next frame figure in determining module 320
After the out of focus numerical value of picture, by the previous frame image of the out of focus numerical value of next two field picture obtaining and the current frame image being screened out
Out of focus numerical value be compared, whether be abnormal numerical value with the out of focus numerical value that determines next two field picture.If next two field picture
Out of focus numerical value is abnormal numerical value, then screen out the out of focus numerical value that module 330 screens out next two field picture.Specific example is as follows：
The out of focus numerical value of the current frame image that a certain moment determining module 320 obtains is 60, the out of focus number of previous frame image
Value is 50.Because the out of focus numerical value 60 of current frame image is more than the out of focus numerical value 50 of previous frame image it is determined that module 320 is true
The out of focus numerical value of settled prior image frame is abnormal numerical value.Therefore, screen out module 330 and screen out out of focus numerical value 60.It is next determined that mould
Block 320 obtains the out of focus numerical value of next two field picture, and by out of focus numerical value and the previous frame image of next two field picture obtaining from
Whether burnt numerical value 50 is compared, be abnormal numerical value with the out of focus numerical value that determines next two field picture.If next two field picture from
Burnt numerical value is abnormal numerical value, then screen out the out of focus numerical value that module 330 screens out next two field picture.
Focusing module 340, screens out the out of focus numerical value after abnormal numerical value for basis and is focused.
Specifically, if the out of focus numerical value of current frame image is regime values, Focusing module 340 is according to current frame image
Out of focus numerical value is focused.
If it should be noted that the out of focus numerical value of current frame image is regime values, in Focusing module 340 according to current
After the out of focus numerical value of two field picture is focused, continue to judge whether the out of focus numerical value of next two field picture is abnormal numerical value, until
Complete focus process.
The focusing method of embodiments of the invention is that Focusing module 340 is carried out according to screening out the out of focus numerical value after abnormal numerical value
Focusing.That is, being focused according to all regime values.It is gradually lowered due to screening out the out of focus numerical value after abnormal numerical value
And convergence 0, it is finally completed focusing.Thus it is guaranteed that the accuracy of focusing.
It should be noted that the aforementioned explanation to focusing method embodiment is also applied for the focusing dress of this embodiment
Put, here is omitted.
The focusing mechanism of the embodiment of the present invention, first turns on phase place focusing, and records each two field picture in focus process
Out of focus numerical value, it is then determined that abnormal numerical value in out of focus numerical value screen out abnormal numerical value, and according to normal number in focus process
Out of focus numerical value after value screens out abnormal numerical value is focused.The method ensure that out of focus numerical stability it is ensured that phase place
The accuracy of focusing.
Fig. 4 is the structural representation of the focusing mechanism according to one specific embodiment of the present invention.
As shown in figure 4, focusing mechanism includes logging modle 310, determining module 320, screens out module 330, update module
350th, Focusing module 340.
Focusing module 340 is used for open phase and focuses, and records the out of focus numerical value of each two field picture in focus process.Record mould
Block includes detector unit 311 and computing unit 312.
Detector unit 311, for detecting the phase-detection value of each two field picture.
Computing unit 312, for calculating out of focus numerical value according to phase-detection value.
Specifically it is assumed that user travels at certain sight spot, quasi- spare mobile phone takes an ancient building, and at this moment user opens mobile phone
In photographing unit, capture after building with photographic head, logging modle 310 open phase focus.It should be noted that except handss
Outside machine, user also can have the photographing device of phase place focus function using other, is not limited thereto.
In logging modle 310 open phase to defocused, detector unit 311 can detect to the image found a view in picture,
Detect the phase-detection value of each two field picture, computing unit 312 calculates the out of focus of each two field picture according to phase-detection value
Numerical value, logging modle 310 records the out of focus numerical value of each two field picture.It should be noted that out of focus numerical value is using existing skill
Art calculates, and here is omitted.
Wherein, out of focus numerical value represents the burnt position of clutch.Out of focus numerical value is less, represents that the burnt position of clutch is nearer.When from
Burnt numerical value level off to 0 when, represent and be in the position of focus, that is, complete to focus.
Determining module 320, for determining the abnormal numerical value in out of focus numerical value.
Specifically, it is determined that module 320 obtains the out of focus numerical value of current frame image according to the out of focus numerical value of record.Determining mould
After block 320 obtains the out of focus numerical value of current frame image, by the out of focus number of the out of focus numerical value of current frame image and previous frame image
Whether value is compared, be abnormal numerical value with the out of focus numerical value that determines current frame image.
If the out of focus numerical value of current frame image is more than the out of focus numerical value of previous frame image it is determined that module 320 can be true
The out of focus numerical value of settled prior image frame is abnormal numerical value.Specific example is as follows：The determining module 320 that a certain moment obtains obtains
The out of focus numerical value of current frame image is 80, and the out of focus numerical value of previous frame image is 50.At this moment, the out of focus numerical value 80 of current frame image
Out of focus numerical value 50 more than previous frame image.Due to, in phase place focus process, noise or the exterior light of sensor may be subject to
The impact of the factor such as line is unstable, leads to the phase-detection value of current frame image to increase suddenly, and then leads to current frame image
Out of focus numerical value there occurs mutation with respect to the out of focus numerical value of previous frame image.Accordingly, it is determined that module 320 by current frame image from
Burnt numerical value is defined as abnormal numerical value.
Screen out module 330, be used for screening out abnormal numerical value.
Specifically if it is determined that module 320 determines that the out of focus numerical value of current frame image is abnormal numerical value, then screen out module
The 330 out of focus numerical value screening out current frame image.
If it should be noted that the out of focus numerical value of current frame image is abnormal numerical value, screening out module 330, to screen out this different
After regular data value, the out of focus numerical value of determining module 320 next two field picture of direct access.Obtain next frame figure in determining module 320
After the out of focus numerical value of picture, by the previous frame image of the out of focus numerical value of next two field picture obtaining and the current frame image being screened out
Out of focus numerical value be compared, whether be abnormal numerical value with the out of focus numerical value that determines next two field picture.If next two field picture
Out of focus numerical value is abnormal numerical value, then screen out the out of focus numerical value of next two field picture.Specific example is as follows：
The out of focus numerical value of the current frame image that a certain moment determining module 320 obtains is 60, the out of focus number of previous frame image
Value is 50.Because the out of focus numerical value 60 of current frame image is more than the out of focus numerical value 50 of previous frame image it is determined that module 320 is true
The out of focus numerical value of settled prior image frame is abnormal numerical value.Therefore, screen out the out of focus numerical value 60 that module 330 screens out current frame image.
It is next determined that the out of focus numerical value of next two field picture that module 320 obtains, and by the out of focus numerical value of next two field picture and out of focus number
Whether value 50 is compared, be abnormal numerical value with the out of focus numerical value that determines next two field picture.If the out of focus number of next two field picture
Value is abnormal numerical value, then screen out the out of focus numerical value that module 330 screens out next two field picture.
Update module 350, after being regime values in the out of focus numerical value determining current frame image, updates present frame figure
The out of focus numerical value of picture.
Specifically, after the out of focus numerical value that determining module 320 determines current frame image is regime values, update module
The out of focus numerical value of 350 renewal current frame images.
More specifically, after the out of focus numerical value that determining module 320 determines current frame image is regime values, update module
The out of focus numerical value of 350 calculating current frame images and the meansigma methodss of the out of focus numerical value of previous frame image, using meansigma methodss as after update
Present image out of focus numerical value.Specific example is as follows：The out of focus numerical value of the current frame image that determining module 320 obtains is 60,
The out of focus numerical value of previous frame image is 80.The out of focus numerical value 60 of current frame image is less than the out of focus numerical value 80 of previous frame image, really
Cover half block 320 determines that the out of focus numerical value 60 of current frame image is regime values.
After the out of focus numerical value 60 that determining module 320 determines current frame image is regime values, update module 350 updates to be worked as
The out of focus numerical value of prior image frame.First, update module 350 calculate the out of focus numerical value 60 of current frame image and previous frame image from
The meansigma methodss of burnt numerical value 80, being calculated meansigma methodss is 70.Then, using the out of focus of meansigma methodss 70 current frame image as after update
Numerical value, that is, the out of focus numerical value of current frame image be updated to 70.
Focusing module 340, is additionally operable to after updating the out of focus numerical value of current frame image, according to the present frame figure after updating
The out of focus numerical value of picture is focused.
Specifically, if the out of focus numerical value of current frame image is regime values, update current frame image in update module 350
Out of focus numerical value after, Focusing module 340 is focused according to the out of focus numerical value of current frame image after updating.
It should be noted that carrying out to defocused in Focusing module 340 according to the out of focus numerical value of the current frame image after updating,
Determining module 320 continues to judge whether the out of focus numerical value of next two field picture is abnormal numerical value, until completing focus process.
From whole focus process will, the focusing method of embodiments of the invention is Focusing module 350 according to screening out abnormal number
Out of focus numerical value after value is focused that is to say, that being focused according to the out of focus numerical value after all renewal.Due to screening out exception
Out of focus numerical value after renewal after numerical value is gradually lowered and levels off to 0, is finally completed focusing.Thus it is guaranteed that focusing is accurate
Property.
It should be noted that the aforementioned explanation to focusing method embodiment is also applied for the focusing dress of this embodiment
Put, here is omitted.
The focusing mechanism of the embodiment of the present invention, screens out different constant value, updates the out of focus numerical value being confirmed as regime values,
And focused according to the out of focus numerical value after updating, make out of focus numerical value smoother and stable, further ensure phase place focusing
Accuracy.
In order to realize above-described embodiment, the invention allows for another kind of mobile terminal.
Mobile terminal provided in an embodiment of the present invention, as shown in figure 5, include：Housing 51, power circuit 52, circuit board 53,
Processor 54 and memorizer 55, wherein, circuit board 53 is placed in the interior volume that housing 51 surrounds, processor 54 and memorizer 55
It is arranged on circuit board 53；Power circuit 52, for being each circuit of terminal unit or device is powered；Memorizer 55 is used for depositing
Storage executable program code；Processor 54 is run and executable journey by reading the executable program code of storage in memorizer
The corresponding program of sequence code, for executing following steps：
Open phase is focused, and records the out of focus numerical value of each two field picture in focus process；
Determine the abnormal numerical value in out of focus numerical value；
Screen out abnormal numerical value；And
Focused according to screening out the out of focus numerical value after abnormal numerical value.
The mobile terminal of the embodiment of the present invention, first turns on phase place focusing, and records each two field picture in focus process
Out of focus numerical value, it is then determined that abnormal numerical value in out of focus numerical value screen out abnormal data value, finally according to screening out after abnormal numerical value
Out of focus numerical value focused.The method ensure that out of focus numerical stability, thus ensureing the accuracy of phase place focusing.
In the description of this specification, reference term：" embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (15)
1. a kind of focusing method is it is characterised in that include：
Open phase is focused, and records the out of focus numerical value of each two field picture in focus process；
Determine the abnormal numerical value in described out of focus numerical value；
Screen out described abnormal numerical value；And
Out of focus numerical value according to screening out after described abnormal numerical value is focused.
2. the method for claim 1, it is characterised in that recording the out of focus numerical value of each two field picture in focus process, is wrapped
Include：
Detect the phase-detection value of described each two field picture；
Described out of focus numerical value is calculated according to described phase-detection value.
3. the method for claim 1 it is characterised in that determine described out of focus numerical value in abnormal numerical value, including：
Obtain the out of focus numerical value of current frame image；
The out of focus numerical value of the out of focus numerical value of described current frame image and previous frame image is compared；
If the out of focus numerical value of described current frame image is more than the out of focus numerical value of described previous frame image it is determined that described present frame
The out of focus numerical value of image is abnormal numerical value.
4. method as claimed in claim 3 is it is characterised in that also include：
If the out of focus numerical value of described current frame image is less than the out of focus numerical value of described previous frame image it is determined that described present frame
The out of focus numerical value of image is regime values；
Focused according to described regime values.
5. method as claimed in claim 3 is it is characterised in that also include：
After the out of focus numerical value determining described current frame image is regime values, update the out of focus number of described current frame image
Value.
6. method as claimed in claim 5 it is characterised in that update described current frame image out of focus numerical value, including：
Calculate the meansigma methodss of the out of focus numerical value of described current frame image and the out of focus numerical value of described previous frame image, will be described average
Value is as the out of focus numerical value of the described current frame image after updating.
7. method as claimed in claim 6 is it is characterised in that also include：
After updating the out of focus numerical value of described current frame image, entered according to the out of focus numerical value of the described current frame image after updating
Row focusing.
8. a kind of focusing mechanism is it is characterised in that include：
Logging modle, for open phase focusing, and records the out of focus numerical value of each two field picture in focus process；
Determining module, for determining the abnormal numerical value in described out of focus numerical value；
Screen out module, be used for screening out described abnormal numerical value；And
Focusing module, for being focused according to the out of focus numerical value screening out after described abnormal numerical value.
9. device as claimed in claim 8 is it is characterised in that described logging modle, including：
Detector unit, for detecting the phase-detection value of described each two field picture；
Computing unit, for calculating described out of focus numerical value according to described phase-detection value.
10. device as claimed in claim 8, it is characterised in that described determining module, is used for：
Obtain the out of focus numerical value of current frame image；
The out of focus numerical value of the out of focus numerical value of described current frame image and previous frame image is compared；
If the out of focus numerical value of described current frame image is more than the out of focus numerical value of described previous frame image it is determined that described present frame
The out of focus numerical value of image is abnormal numerical value.
11. devices as claimed in claim 10, it is characterised in that described determining module, are additionally operable to：
If the out of focus numerical value of described current frame image is less than the out of focus numerical value of described previous frame image it is determined that described present frame
The out of focus numerical value of image is regime values；
Described Focusing module, for being focused according to described regime values.
12. devices as claimed in claim 10 are it is characterised in that described device also includes：
Update module, after being regime values in the out of focus numerical value determining described current frame image, updates described present frame
The out of focus numerical value of image.
13. devices as claimed in claim 12, it is characterised in that described update module, are used for：
Calculate the meansigma methodss of the out of focus numerical value of described current frame image and the out of focus numerical value of described previous frame image, will be described average
Value is as the out of focus numerical value of the described current frame image after updating.
14. devices as claimed in claim 13, it is characterised in that described Focusing module, are additionally operable to：
After updating the out of focus numerical value of described current frame image, entered according to the out of focus numerical value of the described current frame image after updating
Row focusing.
A kind of 15. mobile terminals are it is characterised in that include：Housing, power circuit, circuit board, processor and memorizer, wherein,
Described circuit board is placed in the interior volume that described housing surrounds, and described processor and described memorizer are arranged on described circuit board
On；Described power circuit, for being each circuit of described mobile terminal or device is powered；Described memorizer is used for storing can be held
Line program code；Described processor is run by the executable program code of storage in the described memorizer of reading and is held with described
The corresponding program of line program code, for executing following steps：
Open phase is focused, and records the out of focus numerical value of each two field picture in focus process；
Determine the abnormal numerical value in described out of focus numerical value；
Screen out described abnormal numerical value；And
Out of focus numerical value according to screening out after described abnormal numerical value is focused.
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