CN106791441B - Control method, control device and electronic device - Google Patents
Control method, control device and electronic device Download PDFInfo
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- CN106791441B CN106791441B CN201710051394.7A CN201710051394A CN106791441B CN 106791441 B CN106791441 B CN 106791441B CN 201710051394 A CN201710051394 A CN 201710051394A CN 106791441 B CN106791441 B CN 106791441B
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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
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
The invention discloses a kind of control methods, and for controlling electronic device, the electronic device includes imaging device, and control method includes: to handle the multiframe cache image of imaging device output to recognize whether human face region；Human face region is divided into multiple subregions when there are human face region；Calculate the focus value of each subregion；The focus value of each subregion is weighted to obtain new focus value；It is focused according to new focus value.The invention also discloses a kind of control device and electronic devices.Control method, control device and the electronic device of embodiment of the present invention carry out subregional weighted calculation to the image containing human face region shot under half-light environment to increase the difference between the focus value of each frame image, to promote the accuracy of focusing.
Description
Technical field
The present invention relates to focusing technology more particularly to a kind of control method, control device and electronic devices.
Background technique
The lower scenes of contrast certain for half-light or backlight etc., focus value (Focus in contrast formula focusing method
Value variation tendency) is less obvious, leads to possibly not finding the maximum point of focus value to cannot achieve focusing.
Summary of the invention
The embodiment of the present invention provides a kind of control method, control device and electronic device.
The control method of embodiment of the present invention, for controlling electronic device, the electronic device includes imaging device, institute
State control method the following steps are included:
The multiframe cache image of the imaging device output is handled to recognize whether human face region；
The human face region is divided into multiple subregions when there are the human face region；
Calculate the focus value of each subregion；
The focus value of each subregion is weighted to obtain new focus value；With
It is focused according to the new focus value.
The control device of embodiment of the present invention, for controlling electronic device, the control device includes identification module, draws
Sub-module, computing module and Focusing module.The identification module is used to handle the multiframe cache image of the imaging device output
To recognize whether human face region；The division module is for dividing the human face region when there are the human face region
For multiple subregions；The computing module is used to calculate the focus value of each subregion；The computing module is also used to pair
The focus value of each subregion is weighted to obtain new focus value；The Focusing module is used for according to described new poly-
Coke number is focused.
The electronic device of embodiment of the present invention includes imaging device and above-mentioned control device.The imaging device and institute
State control device electrical connection.
Control method, control device and the electronic device of embodiment of the present invention when shooting the image under half-light environment,
Image containing human face region is carried out dividing region and the focus value of each region is calculated using different weighted values,
The difference between focus value to increase each frame image, promotes the accuracy of focusing.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the flow diagram of the control method of embodiment of the present invention；
Fig. 2 is the functional block diagram of the electronic device of embodiment of the present invention；
Fig. 3 is the schematic diagram in kind of the electronic device of embodiment of the present invention；
Fig. 4 is the schematic diagram of the focus value curve of embodiment of the present invention；
Fig. 5 is the flow diagram of the control method of certain embodiments of the present invention；
Fig. 6 is the functional block diagram of the electronic device of certain embodiments of the present invention；
Fig. 7 is the flow diagram of the control method of certain embodiments of the present invention；
Fig. 8 is the functional block diagram of the electronic device of certain embodiments of the present invention；
Fig. 9 is the flow diagram of the control method of certain embodiments of the present invention；
Figure 10 is the functional block diagram of the electronic device of certain embodiments of the present invention；
Figure 11 is the flow diagram of the control method of certain embodiments of the present invention；
Figure 12 is the functional block diagram of the imaging device of certain embodiments of the present invention；With
Figure 13 is the functional block diagram of the electronic device of certain embodiments of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
Please refer to Fig. 1 to 3, the control method of embodiment of the present invention, for controlling electronic device 100, control method packet
Include following steps:
S11: the multiframe cache image that processing imaging device 20 exports is to recognize whether human face region；
S13: the human face region is divided into multiple subregions when there are the human face region；
S15: the focus value of each subregion is calculated；
S17: the focus value of each subregion is weighted to obtain new focus value；With
S19: it is focused according to the new focus value.
The control method of embodiment of the present invention can be realized by control device 10.Control device 10 include identification module 11,
Division module 13, computing module 15 and Focusing module 17.Step S1 can be realized that step S13 can be by drawing by identification module 11
Sub-module 13 realizes that step S15 can be realized that step S17 can also be realized by computing module 15, step by computing module 15
S19 can be realized by Focusing module 17.
In other words, identification module 11 is used to handle the multiframe cache image of the output of imaging device 20 to recognize whether
Human face region；Division module 13 is for being divided into multiple subregions for the human face region when there are the human face region；Meter
Calculate the focus value that module 15 is used to calculate each subregion；Computing module 15 is also used to the focusing to each subregion
Value is weighted to obtain new focus value；Focusing module 17 according to the new focus value for focusing.
The control device 10 of embodiment of the present invention is applied to electronic device 100.In other words, electronic device 100 includes
Control device 10.The control device 10 of embodiment of the present invention further includes imaging device 20.Wherein, control device 10 and imaging dress
Set 20 electrical connections.
In some embodiments, electronic device 100 includes mobile phone, tablet computer, Intelligent bracelet, smartwatch, intelligence
The helmet, intelligent glasses, laptop etc., are not intended to be limited in any herein.In a specific embodiment of the present invention, electronic device
100 be mobile phone.
In some embodiments, imaging device 20 includes front camera and/or rear camera.
Referring to Fig. 4, it is appreciated that when electronic device 100 shoots the facial image under half-light or backlight environment, due to whole
The brightness of body image is darker, thus while focusing focus value i.e. FV (Focus Value) value of multiframe cache image for counting it
Between difference it is smaller (as shown in dashed curve in Fig. 4), to be difficult to find that a high position for the curve of focus value turns in focus process
Point is the maximum point of focus value curve, leads to not accurately focus.The control method of embodiment of the present invention is by facial image
After dividing region, the focus value in each region is calculated using different weighted values, to increase the focusing of each frame image
Difference (as shown in block curve in Fig. 4) between value, so that electronic device 100 can accurately find focus value in focus process
The upper inflection point of curve promotes focusing clarity, realizes accurate focusing.
Referring to Fig. 5, in some embodiments, step S17 is weighted meter to the focus value of each subregion
Calculate to obtain new focus value the following steps are included:
S171: the focus value is divided by multiple set according to the size of the focus value, each set includes
At least one described focus value；With
S172: different weighted values is used to calculate the focus value in each set to obtain updating for the first time
New focus value, the corresponding weighted value of each set.
Referring to Fig. 6, in some embodiments, computing module 15 includes division unit 151 and the first computing unit
152.Step S171 can be realized that step S172 can be realized by the first computing unit 152 by division unit 151.
In other words, division unit 151 is used to that the focus value to be divided into multiple collection according to the size of the focus value
It closes, each set includes at least one described focus value；First computing unit 152 is used for using different weighted values to each
Focus value in a set is calculated to obtain the new focus value updated for the first time, each corresponding institute of the set
State weighted value.
Referring to Fig. 7, in some embodiments, step S171 draws the focus value according to the size of the focus value
Be divided into it is multiple set the following steps are included:
S1711: according to the size of the focus value to the focus value carry out sequence arrangement；With
S1712: the focus value after sequence is arranged is divided into multiple set.
Referring to Fig. 8, in some embodiments, division unit 151 includes arrangement subelement 1511 and division subelement
1512.Step S1711 can be realized that step S1712 can be realized by division subelement 1512 by arrangement subelement 1511.
In other words, arrangement subelement 1511 is used for the size according to the focus value to the focus value carry out sequence row
Column；It divides the focus value after subelement 1512 is used to arrange sequence and is divided into multiple set.
In a specific embodiment of the present invention, after recognizing human face region, human face region is divided into 5*5 son first
Region, and calculate separately the focus value of each subregion.Then, ascending order arrangement is carried out to focus value according to the size of focus value,
And the focus value after arranging ascending order is divided into 5 set.Specifically, the focus value that arrangement position is 1 to 5 is divided into first
In set, the focus value that arrangement position is 6 to 10 is divided into second set, the focus value that arrangement position is 11 to 15 is drawn
It assigns in third set, the focus value of arrangement position position 16 to 20 is divided into the 4th set, be 21 to 25 by arrangement position
Focus value be divided into the 5th set in.Then, different weighted values is distributed to each set to calculate the new of update for the first time
Focus value.Wherein, the weighted value of first set is 0.5, and the weighted value of second set is 1.0, and the weighted value of third set is
1.5, the weighted value of the 4th set is 2.0, and the weighted value of the 5th set is 2.5.In this way, the bigger subregion of focus value is distributed
Weighted value it is bigger, the new focus value that first time for obtaining after weighted calculation updates is bigger, calculates the total of a frame image subsequent
Specific gravity shared by the new focus value of focus value Shi Yue great is also bigger.In this way, increasing the fluctuating range of focus value curve to be promoted pair
Burnt accuracy.
It should be noted that human face region can not only be divided into 5*5 sub-regions, other numerical value can also be divided into
Subregion, such as 10*10 sub-regions or 15*15 sub-regions.In addition, the size according to focus value arranges focus value
Not only ascending order arrangement can be carried out to focus value when column, descending arrangement can also be carried out to focus value, for example, human face region is drawn
After being divided into 5*5 sub-regions and calculating the focus values of each sub-regions, descending row is carried out to focus value according to the size of focus value
Column.Furthermore in the step of focus value is divided into multiple set, the value of the number of set can be 5, or 6,
10, other numerical value such as 12, and the number of the included focus value of each set can be equal, be also possible to not equal.Separately
Outside, each weighted value distributed of gathering is also not limited to 0.5,1.0,1.5,2.0,2.5 etc. in the specific embodiment of the invention
Weighted value, or other weighted values, such as 0.8,1.6,2.4,3.2,4.0 equal weight values.
Referring to Fig. 9, in some embodiments, focus value includes the focusing of the focus value and horizontal direction of vertical direction
Value, step S17 is weighted the focus value of each subregion further comprising the steps of to obtain new focus value:
S173: the new focus value that the first time of the vertical direction updates is weighted to obtain described hang down
Histogram to second update new focus value；With
S174: the new focus value updated to the first time of the horizontal direction is weighted to obtain the water
Square to second update new focus value.
Referring to Fig. 10, in some embodiments, computing module 15 further includes the second computing unit 153.Step S173
It can be realized by the second computing unit 153, step S174 can also be realized by the second computing unit 153.
In other words, the second computing unit 153 is used for the new focus value updated to the first time of the vertical direction
It is weighted to obtain the new focus value of second of vertical direction update；Second computing unit 153 is also used to pair
The new focus value that the first time of the horizontal direction updates is weighted to obtain second of the horizontal direction
The new focus value updated.
In a specific embodiment of the present invention, since first time updated new focus value can be decomposed into vertical direction
The new focus value of new focus value and horizontal direction, since the details of eyebrow and eyes is relatively abundanter in human face region, in the picture
The gradient for showing as the focus value of vertical direction becomes apparent compared to the gradient of the focus value of horizontal direction, therefore, to vertical
The new focus value that the first time in direction updates obtains second of updated new focusing of vertical direction multiplied by weighted value 0.7
Value, after second of update for obtaining horizontal direction multiplied by weighted value 0.3 to the new focus value that the first time of horizontal direction updates
New focus value, later by the second of second updated new focus value of the vertical direction after weighted calculation and horizontal direction
Secondary updated new focus value is synthesized to obtain the new focus value of each sub-regions.In this way, focusing can be further increased
It is worth the fluctuating range of curve, promotes the accuracy of focusing.
It should be noted that weighted value corresponding to first time updated new focus value both vertically and horizontally
It may be other numerical value.The weighted value as corresponding to the first time of vertical direction updated new focus value can be 0.8, horizontal
Weighted value corresponding to the first time in direction updated new focus value can be 0.2.
Refering to fig. 11 to 12 please be adopt, in some embodiments, step S19 carries out focusing according to the new focus value and includes
Following steps:
S191: the gross focusing value of cache image described in every frame is calculated using the new focus value；
S192: judge whether the gross focusing value of cache image described in multiframe upper inflection point occurs；With
S193: the driving of motor 22 is controlled when there is the upper inflection point, the imaging device is moved to focus lens 21
Focusing position.
Figure 13 is please referred to, in some embodiments, Focusing module 17 includes third computing unit 171, judging unit 172
With control unit 173.Step S191 can be realized that step S192 can be real by judging unit 172 by third computing unit 171
Existing, step S193 can be realized by control unit 173.
In other words, third computing unit 171 is used to calculate the total of cache image described in every frame using the new focus value
Focus value；Judging unit 172 is for judging whether the gross focusing value of cache image described in multiframe upper inflection point occurs；Control unit
The 173 focusing positions that focus lens 21 are moved to the imaging device for controlling the driving of motor 22 when there is the upper inflection point
It sets.
Wherein, upper inflection point refers to the maximum point on the curve of gross focusing value.Since motor 22 drives to focus lens
21 is mobile, so that the never focus state of imaging device 20 becomes focus state, then becomes non-focus state to focus state,
In the whole process, the gross focusing value of cache image first increases reduces again, so there is a upper inflection point, i.e. maximum
Point, at this time it is considered that imaging device 20 is in focus state.In this way, imaging device 20 finds the pole on the curve of gross focusing value
Focusing can be realized after big value point i.e. upper inflection point.
It is appreciated that being divided into multiple subregions to the human face region of every frame image and calculating the second of each sub-regions
After secondary updated new focus value, it can use multiple new focus values and calculate the corresponding gross focusing value of every frame image.Gross focusing
The calculation method of value is that multiple new focus values are summed and are averaged.Since gross focusing value is by after multiple weighted calculations
New focus value calculate and get, therefore, differing greatly between the gross focusing value of each frame image, in other words, by multiple total
The fluctuating range for the gross focusing value curve that focus value is formed is larger, and it is bent that imaging device 20 can relatively accurately find gross focusing value
Maximum extreme point in line, so that it is determined that the focusing position of imaging device 20.In this way, being lifted at when being shot under half-light environment
The accuracy of focusing promotes shooting quality.
In the description of embodiments of the present invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length
Degree ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The orientation or positional relationship of the instructions such as "outside", " clockwise ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, only
It is embodiments of the present invention and simplified description for ease of description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as the limitation to embodiments of the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more feature.In the description of embodiments of the present invention, the meaning of " plurality " is two
It is a or more than two, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, can also lead to
It crosses intermediary to be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For ability
For the those of ordinary skill in domain, can understand as the case may be above-mentioned term in embodiments of the present invention specifically contain
Justice.
In embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature second feature it
"upper" or "lower" may include that the first and second features directly contact, may include the first and second features be not directly to connect yet
It touches but by the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature right above second feature and oblique upper, or to be merely representative of first feature horizontal height special higher than second
Sign.Fisrt feature include under the second feature " below ", " below " and " below " fisrt feature immediately below second feature and obliquely downward
Side, or first feature horizontal height is merely representative of less than second feature.
Above disclosure provides many different embodiments or example is used to realize embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, above the component of specific examples and setting are described.When
So, they are merely examples, and is not intended to limit the present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relationship between various embodiments and/or setting.In addition, the various specific techniques that embodiments of the present invention provide
With the example of material, but those of ordinary skill in the art may be aware that the application of other techniques and/or other materials make
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (7)
1. a kind of control method, for controlling electronic device, which is characterized in that the electronic device includes imaging device, described
Imaging device includes described to focus lens and driving moving to focus lens along optical axis between close burnt position and remote coke position with reality
The motor now focused, the control method the following steps are included:
The multiframe cache image of the imaging device output is handled to recognize whether human face region；
The human face region is divided into multiple subregions when there are the human face region；
Calculate the focus value of each subregion；
The focus value is divided into multiple set according to the size of the focus value, each set includes at least one institute
State focus value；
Different weighted values is used to calculate the focus value in each set to obtain the new focusing updated for the first time
Value, each corresponding weighted value of the set, wherein the weighted value that the bigger subregion of focus value is distributed is bigger,
And the weighted value that the different subregions is distributed is different；
The gross focusing value of cache image described in every frame is calculated using the new focus value；
Judge whether the gross focusing value of cache image described in multiframe upper inflection point occurs；With
The motor is controlled when there is the upper inflection point drives the focusing that focus lens are moved to the imaging device
Position.
2. control method as described in claim 1, which is characterized in that the size according to the focus value is by the focusing
Value be divided into the step of multiple set the following steps are included:
According to the size of the focus value to the focus value carry out sequence arrangement；With
The focus value after sequence is arranged is divided into multiple set.
3. control method as claimed in claim 2, which is characterized in that the focus value includes the focus value and water of vertical direction
Square to focus value；The step of size according to the focus value is weighted to obtain new focus value include with
Lower step:
The new focus value updated to the first time of the vertical direction is weighted to obtain the vertical direction
Second of new focus value updated；With
The new focus value updated to the first time of the horizontal direction is weighted to obtain the horizontal direction
Second of new focus value updated.
4. a kind of control device, for controlling electronic device, which is characterized in that the electronic device includes imaging device, described
Imaging device includes described to focus lens and driving moving to focus lens along optical axis between close burnt position and remote coke position with reality
The motor now focused, the control device include:
Identification module, the identification module are used to handle the multiframe cache image of the imaging device output to recognize whether
Human face region；
Division module, the division module is for being divided into multiple sub-districts for the human face region when there are the human face region
Domain；
Computing module, the computing module are used to calculate the focus value of each subregion；With
The computing module is also used to that the focus value is divided into multiple set according to the size of the focus value, each described
Set includes at least one described focus value；
Different weighted values is used to calculate the focus value in each set to obtain the new focusing updated for the first time
Value, each corresponding weighted value of the set, wherein the weighted value that the bigger subregion of focus value is distributed is bigger,
And the weighted value that the different subregions is distributed is different；With
Focusing module, the Focusing module are used to calculate the gross focusing value of cache image described in every frame using the new focus value；
Judge whether the gross focusing value of cache image described in multiframe upper inflection point occurs；Described in being controlled when there is the upper inflection point
Motor drives the focusing position that focus lens are moved to the imaging device.
5. the control device as described in right will go 4, which is characterized in that the computing module includes: division unit, the division
Unit is used to that the focus value to be divided into multiple set according to the size of the focus value, and each set includes at least one
A focus value, the division unit include:
Subelement is arranged, the arrangement subelement is used for the size according to the focus value to the focus value carry out sequence row
Column；With
Subelement is divided, the subelement that divides is used to the focus value after sequence arrangement being divided into multiple set.
6. control device as claimed in claim 5, which is characterized in that the focus value includes the focus value and water of vertical direction
Square to focus value, the computing module further include:
Second computing unit, second computing unit are used for the new focus value updated to the first time of the vertical direction
It is weighted to obtain the new focus value of second of vertical direction update；With for the institute to the horizontal direction
The new focus value updated for the first time is stated to be weighted to obtain the new focus value of second of horizontal direction update.
7. a kind of electronic device, which is characterized in that the electronic device includes:
Imaging device；With
Control device as described in claim 4 to 6 any one, the control device and imaging device electrical connection.
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| CN107832668A (en) * | 2017-10-10 | 2018-03-23 | 广东欧珀移动通信有限公司 | Facial image acquisition method and relevant device |
| CN111064893A (en) * | 2019-12-27 | 2020-04-24 | 上海摩勤智能技术有限公司 | Code scanning and photographing compatible method and electronic terminal |
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