CN106773453A - A kind of method of camera exposure, device and mobile terminal - Google Patents
A kind of method of camera exposure, device and mobile terminal Download PDFInfo
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- CN106773453A CN106773453A CN201710047281.XA CN201710047281A CN106773453A CN 106773453 A CN106773453 A CN 106773453A CN 201710047281 A CN201710047281 A CN 201710047281A CN 106773453 A CN106773453 A CN 106773453A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/099—Arrangement of photoelectric elements in or on the camera
- G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
Abstract
The invention discloses a kind of method of camera exposure, the method includes：The picture that camera sensor is input into is divided into multiple photosensitive units according to predetermined manner；Calculate the first brightness of brightness highest photosensitive unit in the picture；Calculate the first mean flow rate of all photosensitive units in the picture；Exposure brightness is obtained with the first mean flow rate of all photosensitive units in the picture by the first brightness of the brightness highest photosensitive unit；The picture that the camera sensor is input into is processed and shown according to the exposure brightness.Present invention also offers a kind of device and mobile terminal of the camera exposure of the use above method, based on above-mentioned technical proposal, the embodiment of the present invention can solve center and concentrate the highlighted unsharp technical problem of picture photographing.
Description
Technical field
The present invention relates to photographing technical field, more particularly to the method for camera exposure, device and mobile terminal.
Background technology
At present, media communication service is more and more flourishing, and image and audio signal or text envelope are carried out by mobile terminal
Sending and receiving for breath is also more and more universal.Mobile terminal with built-in camera on the one hand refer to built-in camera,
On the other hand refer to the mobile terminal of the small digital cameras that can be connected thereto.In development in recent years, in order to improve shifting
The picture quality of terminal is moved, it is necessary to adjust the light of subject, when the insufficient light of subject, the image of shooting
Noise may be included, it causes the decline of the brightness of image and color sense, accordingly, it would be desirable to exposure regulation is arrived and corresponding illumination
The ability that condition is mutually fitted.
But in the case that lighting condition is more complicated in some environment, expose regulation ability show it is serious
It is not enough.Such as, when PPT PowerPoints are shot, PPT background overexposures can be presented because scene is excessively dark, show as whole
PPT PowerPoint picture whites are a piece of, it is impossible to recognize the content in PPT PowerPoints, simultaneously for the PPT of those black matrix wrongly written or mispronounced characters
PowerPoint, also due to scene reason shows as the serious glare of white font, leads to not to differentiate interior in PPT PowerPoints
Hold.
The content of the invention
One of purpose of the invention is to propose a kind of method of camera exposure, device and mobile terminal, is solved
Prior art exist highlighted picture is concentrated centered on shooting picture in the case of shoot unsharp technical problem.The present invention is carried
Many technique effects elaboration as detailed below that optimal technical scheme in many technical schemes for supplying can be generated.
To achieve the above object, the invention provides following technical scheme：
A kind of method of camera exposure, the method includes：
The picture that camera sensor is input into is divided into multiple photosensitive units according to predetermined manner；
Calculate the first brightness of brightness highest photosensitive unit in the picture；
Calculate the first mean flow rate of all photosensitive units in the picture；
The first brightness by the brightness highest photosensitive unit is flat with first of all photosensitive units in the picture
Equal brightness obtains exposure brightness；
The picture that the camera sensor is input into is processed and shown according to the exposure brightness.
Preferably, the computing formula of acquisition exposure brightness is：Exposure brightness=L × W+C × (1-W)；
Wherein, L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.
Preferably, first brightness for calculating brightness highest photosensitive unit in the picture, including：
A photosensitive area will be defined as per adjacent N number of photosensitive unit；
The mean flow rate of N number of photosensitive unit in each photosensitive area is calculated, the mean flow rate is the second mean flow rate；
The brightness for calculating brightness highest photosensitive unit in N number of photosensitive unit in the second mean flow rate highest photosensitive area is
First brightness.
Preferably, first mean flow rate for calculating all photosensitive units in the picture, including：
A photosensitive area will be defined as per adjacent N number of photosensitive unit；
The mean flow rate of N number of photosensitive unit in each photosensitive area is calculated, the mean flow rate is the second mean flow rate；
The average value of each mean flow rate of photosensitive area second is calculated, the average value is the first mean flow rate.
Preferably, N values are not less than 4.
Preferably, before first brightness for calculating brightness highest photosensitive unit in the picture, also include：
Judge camera sensor input picture whether centered on concentrate highlighted picture, if then performing follow-up step
Suddenly.
Preferably, judge the picture whether centered on concentrate highlighted picture, including：
It is photosensitive centered on the picture is divided according to the division result of the multiple photosensitive units divided to the picture
Area, center extension photosensitive area and surrounding photosensitive area, the center photosensitive area is by the multiple in center in the picture
Photosensitive unit is constituted, and the center extension photosensitive area is made up of the multiple photosensitive units in the photosensitive area edge in center, and described four
All photosensitive areas are made up of the multiple photosensitive units in surrounding position in picture；
Calculate the quantity of the photosensitive unit high of brightness in the picture；
The mean flow rate of the photosensitive unit of the surrounding photosensitive area is calculated, the 3rd mean flow rate is obtained；
The mean flow rate of the photosensitive unit of the center photosensitive area is calculated, the 4th mean flow rate is obtained；
Calculate the quantity of the photosensitive unit of the center photosensitive area and center extension photosensitive area；
Meet following condition when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture：
3rd mean flow rate is not more than first threshold with the ratio of the 4th mean flow rate；
The quantity of the photosensitive unit of center photosensitive area and center extension photosensitive area and brightness highest photosensitive unit in picture
Quantity ratio be not less than Second Threshold；
The ratio of the quantity of brightness photosensitive unit high and the quantity of all photosensitive units in the picture in the picture
Between the 3rd threshold value and the 4th threshold value.
Preferably, the quantity of the photosensitive unit high of brightness in the picture is calculated, including：
The brightness that each photosensitive unit after region division is carried out to the picture carries out real-time detection；
The first brightness of brightness highest photosensitive unit is chosen as initial maximum brightness；
The brightness for choosing the minimum photosensitive unit of brightness is initial minimum brightness；
Initial maximum brightness is chosen with the median of initial minimum brightness as initial intermediate luminance；
By clustering algorithm, according to initial maximum brightness, initial minimum brightness and initial intermediate luminance to institute in picture
There is photosensitive unit to be clustered, obtain the average value of brightness photosensitive unit high, the average value of the photosensitive unit of middle brightness and
The average value of the photosensitive unit of low-light level；
According to each average value, calculating is clustered and be iterated again, after each average value does not change, obtain final bright
The average value of degree photosensitive unit high, the average value of the photosensitive unit of final middle brightness and the photosensitive unit of final low-light level
Average value；
Clustered according to the average value of final brightness photosensitive unit high, resulting photosensitive unit quantity is bright in picture
Degree photosensitive unit quantity high.
Preferably, the scope of the first threshold is 0.95~1；The scope of the Second Threshold is 1.7~2；Described
The scope of three threshold values is 0.45~0.55；The scope of the 4th threshold value is 0.8~0.9.
Preferably, judge the picture whether centered on concentrate the condition of highlighted picture also to include：
Detect the complexity of the photosensitive unit brightness of the surrounding photosensitive area.
Preferably, also include, calculate the quantity of the photosensitive unit of the surrounding photosensitive area；
The detection computing formula of the complexity is：
Wherein, σ is the complexity of the photosensitive unit brightness of the surrounding photosensitive area, and C represents first mean flow rate, Xi
The brightness of each photosensitive unit in the surrounding photosensitive area is represented, N represents the quantity of the photosensitive unit of the surrounding photosensitive area；
When the σ is not more than five threshold values, then judge to concentrate highlighted picture centered on the picture.
Present invention also offers a kind of device of camera exposure, described device includes：
Camera sensor, for gathering picture；
Area division unit, for the picture that the camera sensor is input into be divided into multiple senses according to predetermined manner
Light unit；
Brightness collecting unit, is acquired for the brightness to photosensitive unit in the picture；
First luminance calculation unit, the first brightness for calculating brightness highest photosensitive unit in the picture；
Second luminance calculation unit, the first mean flow rate for calculating all photosensitive units in the picture；
Exposure brightness adjusting unit, for adjusting exposure brightness by adjustment factor；
3rd luminance calculation unit, for obtaining exposure brightness, the exposure brightness is by brightness highest in the picture
Photosensitive unit the first brightness with the picture all photosensitive units the first mean flow rate obtain.
Preferably, the computing formula of acquisition exposure brightness is：Exposure brightness=L × W+C × (1-W)；
Wherein, L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.
Preferably, the first photosensitive area definition unit, for a photosensitive area will to be defined as per adjacent N number of photosensitive unit；
4th luminance calculation unit, the second mean flow rate for calculating N number of photosensitive unit in each photosensitive area；
5th luminance calculation unit, for brightness in N number of photosensitive unit in the second mean flow rate highest photosensitive area of calculating
The brightness of highest photosensitive unit is the first brightness.
Preferably, also including environment identifying unit, the environment identifying unit is used to judge that the camera sensor is defeated
The picture for entering whether centered on concentrate highlighted picture.
Preferably, the second photosensitive area definition unit, the division of the multiple photosensitive units divided to the picture for basis
As a result, center photosensitive area, center extension photosensitive area and surrounding photosensitive area are divided a picture into, the center photosensitive area is by described
The multiple photosensitive units in center are constituted in picture, and the center extension photosensitive area is by the photosensitive area edge in center
Multiple photosensitive unit compositions, the surrounding photosensitive area is made up of the multiple photosensitive units in surrounding position in picture；
Also include, the first photosensitive unit quantitative analysis unit, for the number of the photosensitive unit high to brightness in the picture
Amount is counted；
6th luminance calculation unit, the mean flow rate of the photosensitive unit for calculating the surrounding photosensitive area obtains the 3rd
Mean flow rate；
7th luminance calculation unit, the mean flow rate of the photosensitive unit for calculating the center photosensitive area obtains the 4th
Mean flow rate；
Second photosensitive unit quantitative analysis unit, for calculating the photosensitive of the center photosensitive area and center extension photosensitive area
The quantity of unit；
And first condition identifying unit, for according to following condition to picture whether centered on concentrate the highlighted picture to carry out
Judge, meet following condition when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture：
3rd mean flow rate is not more than first threshold with the ratio of the 4th mean flow rate；
The quantity of the photosensitive unit of center photosensitive area and center extension photosensitive area and brightness highest photosensitive unit in picture
Quantity ratio be not less than Second Threshold；
The ratio of the quantity of brightness photosensitive unit high and the quantity of all photosensitive units in the picture in the picture
Between the 3rd threshold value and the 4th threshold value；
Meet conditions above when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture.
Preferably, also including second condition identifying unit, for the photosensitive unit brightness according to the surrounding photosensitive area
Complexity to picture whether centered on concentrate highlighted picture to judge.
Preferably, also including the 3rd photosensitive unit quantitative analysis unit, the photosensitive list for calculating the surrounding photosensitive area
The quantity of unit；
The detection computing formula of the complexity is：
Wherein, σ is the complexity of the photosensitive unit brightness of the surrounding photosensitive area, and C represents first mean flow rate, Xi
The brightness of each photosensitive unit in the surrounding photosensitive area is represented, N represents the quantity of the photosensitive unit of the surrounding photosensitive area；
When the σ is not more than five threshold values, then judge to concentrate highlighted picture centered on the picture.
Present invention also offers a kind of mobile terminal, including processor and memory：The memory is used to store above-mentioned
The program of any one method, the processor is configurable for performing the program stored in the memory.
Based on above-mentioned technical proposal, the embodiment of the present invention can solve to concentrate highlighted picture photographing unsharp for center
Technical problem.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
The flow chart of the method for the camera exposure that Fig. 1 is provided by the embodiment of the present invention；
The shooting picture region division schematic diagram that Fig. 2 is provided by the embodiment of the present invention；
The stream of the method for the camera exposure of the Optimization Steps S2 that Fig. 3 is provided by embodiment of the present invention preferred embodiment
Cheng Tu；
The method of the camera exposure of Optimization Steps S2 and S3 that Fig. 4 is provided by embodiment of the present invention preferred embodiment
Flow chart；
Fig. 5 judges the camera exposure of step S1 by increase environment that embodiment of the present invention preferred embodiment is provided
The flow chart of method；
The stream of the method for the camera exposure of the Optimization Steps S1 that Fig. 6 is provided by embodiment of the present invention preferred embodiment
Cheng Tu；
Fig. 7 is of the invention on the basis of the preferred embodiment that Fig. 5 is provided, the camera exposure of further Optimization Steps S1
Method flow chart；
The schematic diagram of the device of the camera exposure that Fig. 8 is provided by the embodiment of the present invention.
Reference：
Surrounding photosensitive area A；Center extension photosensitive area B；Center photosensitive area C；Camera sensor 10；Area division unit
20；Brightness collecting unit 30；First luminance calculation unit 41；Second luminance calculation unit 42；3rd luminance calculation unit 43；The
Four luminance calculation units 44；5th luminance calculation unit 45；6th luminance calculation unit 46；7th luminance calculation unit 47；Expose
Brightness adjustment unit 50, the first photosensitive area definition unit 61；Second photosensitive area definition unit 62；Environment identifying unit 70；The
One photosensitive unit quantitative analysis unit 81；Second photosensitive unit quantitative analysis unit 82；3rd photosensitive unit quantitative analysis unit
83；First condition identifying unit 91；Second condition identifying unit 92.
Specific embodiment
Be referred to accompanying drawing Fig. 1~Fig. 8 below and word content understand present disclosure and the present invention with it is existing
Distinctive points between technology.Hereafter accompanying drawing and by way of enumerating some alternative embodiments of the invention, to of the invention
Technical scheme (including optimal technical scheme) is described in further detail.It should be noted that：Any skill in the present embodiment
Art feature, any technical scheme are one or more in the technical characteristic or optional technical scheme of plurality of optional, in order to
Cannot exhaustive all alternative technical characteristics of the invention and alternative technical side in presents the need for description is succinct
Case, the implementation method for being also not easy to each technical characteristic emphasizes that it is one of optional numerous embodiments, so this area
Technical staff should know：Any two for any technological means that the present invention is provided being replaced or providing the present invention
Individual or more technological means or technical characteristic are combined and obtain new technical scheme mutually.Any skill in the present embodiment
Art feature and any technical scheme are not limited the scope of the invention, and protection scope of the present invention should include this area
Technical staff does not pay the thinkable any alternate embodiments of creative work institute and those skilled in the art by the present invention
Any two of offer or more technological means or technical characteristic technical scheme new obtained from being combined mutually.
The embodiment provides a kind of method of camera exposure, device and mobile terminal.
The technical scheme that the present invention is provided is illustrated in more detail with reference to Fig. 1~Fig. 8.
As shown in Figures 1 to 4, the method for the camera exposure that the embodiment of the present invention is provided includes：
Step S0, is divided into multiple photosensitive units, such as Fig. 1 institutes by the picture that camera sensor is input into according to predetermined manner
Show, picture is divided into 16 × 16 photosensitive units according to predetermined manner in the present embodiment, altogether 256 photosensitive units, then
The first brightness of brightness highest photosensitive unit in the picture is calculated by step S2, wherein the calculating of the first brightness at least may be used
Carried out with by following 3 kinds of modes：
1st, searched by way of comparing two-by-two；
2nd, start to be compared one by one by from the photosensitive unit that coordinate is (0,0)；
3rd, as shown in figure 3, by step S21 a photosensitive area will be defined as per adjacent 4 photosensitive units, such as by coordinate
For (0,0), (0,1), (1,0), (1,1) this 4 photosensitive units are defined as a photosensitive area, by (0,1), (0,2), (1,1),
(1,2) this 4 photosensitive units are defined as another photosensitive area, and (1,0), (1,1), (2,0), (2,1) this 4 photosensitive units are determined
Justice is another photosensitive area, by that analogy, that is to say, that picture will be divided into 256 photosensitive areas, calculate 4 in each photosensitive area
The mean flow rate of individual photosensitive unit, the mean flow rate is the second mean flow rate, last then to choose mean flow rate by step S22
Most bright photosensitive unit is the first brightness of brightness highest photosensitive unit in picture in highest photosensitive area, is adopted in this way
The speed of calculating can be effectively improved and cause that result of calculation is more accurate.It is determined that after most bright photosensitive unit, recording the sense
The brightness of light unit is the first brightness.
In addition it is also necessary to the first mean flow rate of all photosensitive units in the picture is calculated, step S31 as shown in Figure 4,
Calculate the first mean flow rate of all photosensitive units in the picture by the following method：Calculate the mean flow rate of all photosensitive areas
And the first mean flow rate averaged as picture.Such as by the way that a photosensitive area will be defined as per adjacent 4 photosensitive units,
Be that (0,0), (0,1), (1,0), (1,1) this 4 photosensitive units are defined as a photosensitive area such as by coordinate, by (0,1), (0,
2), (1,1), (1,2) this 4 photosensitive units are defined as another photosensitive area, by (1,0), (1,1), (2,0), (2,1) this 4
Photosensitive unit is defined as another photosensitive area, by that analogy, then calculates the average bright of all photosensitive units in each photosensitive area
The value of degree, then the first mean flow rate as picture of averaging.
Finally, by step S4, using the first brightness and all photosensitive units in picture of brightness highest photosensitive unit
The carrying out of the first mean flow rate calculate, exposure brightness is obtained, then, according to the exposure brightness to the camera sensor
The picture of input is processed and shown, wherein the formula for calculating exposure brightness is：
Exposure brightness=L × W+C × (1-W)；
Wherein L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.That is, user is taking pictures
During, as long as have selected PPT PowerPoint exposure modes, then can be calculated according to picture real-time detection, brightness is obtained in real time
First brightness of highest photosensitive unit and the first mean flow rate of all photosensitive units in picture, then calculate exposure brightness,
Wherein during exposure brightness is calculated, coefficient value can be configured to realize optimal exposure brightness.
Above-described embodiment is the method based on the camera exposure that have selected under PPT PowerPoint exposure modes, such as Fig. 5 institutes
Show, in order to the method use it is more convenient, can by preferred embodiment below realize picture is analyzed in real time.
Step S1 was performed before step S2 is performed：Determine whether picture is that PPT PowerPoints shoot, if after then performing
Continuous step, and suitable exposure brightness is calculated, if not then being shot according to camera typical exposure pattern.Certainly it is
Camera is analyzed the absolute accuracy of result to picture, and after camera is analyzed to picture, output analysis result is concurrent
Confirmation request is played, by manually being confirmed again, by after confirmation, then exports whether picture is the shooting of PPT PowerPoints
Result, such as, if the method for the camera exposure is had been integrated with certain product, if detecting picture for PPT PowerPoints
Shoot, then initiate the request of " picture shoots for PPT PowerPoints, if start PPT PowerPoints exposure mode ", if with
Family confirmation, then perform subsequent step, is shot according to camera typical exposure pattern if user denies.
As shown in fig. 6, The present invention gives how to judge the picture whether be PPT PowerPoints shoot be preferable to carry out
Mode.
First, as shown in figure 1, region division result according to picture, by the picture be divided into surrounding photosensitive area A, in
Heart extension photosensitive area B, center photosensitive area C, the center photosensitive area C are by the multiple photosensitive list in center in the picture
Unit's composition, the center extension photosensitive area B is made up of the multiple photosensitive units in the photosensitive area edge in center, and the surrounding is photosensitive
Area A is made up of the multiple photosensitive units in surrounding position in picture, and herein below is calculated afterwards：
The quantity of the photosensitive unit high of brightness in the picture is calculated, brightness photosensitive unit high refers in picture
Brightness photosensitive unit higher in all photosensitive units, brightness photosensitive unit high is brightness row in all photosensitive units in picture
Preceding 30% to preceding 40%.Wherein, the preferred embodiment that the determination of brightness photosensitive unit high can be provided using the present invention
Carry out：Carrying out each photosensitive unit brightness after region division to picture first carries out real-time detection, chooses brightness highest photosensitive
Unit brightness is initial maximum brightness, and it is initial minimum brightness to choose the minimum photosensitive unit brightness of brightness, chooses maximum brightness
With the median of minimum brightness as initial intermediate luminance, then by clustering algorithm, all photosensitive units in picture are carried out
The cluster of high, normal, basic three class, obtains the average value of brightness photosensitive unit high, the average value of middle brightness photosensitive unit and low-light level
The average value of photosensitive unit, then according to the average value of each photosensitive unit, clusters again, iterative calculation executed as described above, when average
After value does not change, it is defined by the cluster result, according to the number of the final cluster result photosensitive unit high to brightness in picture
The statistics of amount.
Additionally, also to calculate the mean flow rate of photosensitive unit in surrounding photosensitive area A, the 3rd mean flow rate is obtained；In calculating
The mean flow rate of photosensitive unit in heart photosensitive area C, obtains the 4th mean flow rate；Calculating center photosensitive area C and center extension are photosensitive
The photosensitive unit quantity of photosensitive unit in area B.
And judge following condition whether while meeting following condition：
The ratio of the mean flow rate of photosensitive unit and the mean flow rate of photosensitive unit in center photosensitive area C in surrounding photosensitive area A
Value is not more than first threshold, and the scope of first threshold is 0.95~1, it is ensured that picture center brightness is bright higher than surrounding photosensitive area
Degree, and center brightness local footprint area higher is relatively large.
Additionally, also to judge the quantity of the photosensitive unit quantity photosensitive unit high with brightness in picture in center photosensitive area C
Ratio be not less than Second Threshold, the scope of Second Threshold is 1.7~2, it is ensured that brightness photosensitive unit higher is focused primarily upon
Center photosensitive area C.
Finally, in addition it is also necessary to judge the quantity and the quantity of all photosensitive units in the picture of brightness photosensitive unit high
Ratio is between the 3rd threshold value and the 4th threshold value, wherein the 3rd threshold value is obtained with the 4th threshold value by repeatedly debugging, on-fixed
Value；That is, when brightness photosensitive unit high is too many, picture and the highlighted picture photographing of non-central concentration, when high brightness is single,
It is show as spot light or night scene more, non-PPT scenes, the scope of the 3rd threshold value is 0.45~0.55, and the scope of the 4th threshold value is
0.8~0.9.
If above-mentioned condition meets simultaneously, judge that the picture shoots for PPT PowerPoints, if full when above-mentioned condition is different
Foot, then judge that not PPT PowerPoints shoot the picture.
Shown in Fig. 7, in order to more ensure the accuracy of judgement, it is necessary to increase following decision condition, by detecting described four
The complexity of the photosensitive unit brightness of all photosensitive areas is judged that the computing formula of the complexity is：
Wherein, σ is the complexity of the photosensitive unit brightness of the surrounding photosensitive area, and C represents first mean flow rate, Xi
The brightness of each photosensitive unit in the surrounding photosensitive area is represented, N represents the quantity of the photosensitive unit of the surrounding photosensitive area；
Because when PPT is shot, the background of general surrounding photosensitive area is relatively simple, if environment is complicated, is not considered as PPT scenes, if
Environment is single, then it is assumed that be PPT scenes, so when the σ meets and is not more than five threshold values, then centered on judging the picture
Highlighted picture is concentrated, the scope of the 5th threshold value is 190-210, preferably 200.
By such scheme can intelligence identify to be currently at and carry out PPT shootings, and provided by the present invention
Image pickup method, can effectively solve PPT PowerPoints and shoot unsharp technical problem.
Present invention also offers a kind of mobile terminal, including processor (being not shown) and memory be not (in figure
Show), wherein the memory is used to store the program of the above method, the processor is configurable for performing the storage
The program stored in device.
Present invention also offers a kind of device of camera exposure, as shown in figure 8, the device bag of the camera exposure
Include：
Camera sensor 10, for gathering picture；
Area division unit 20, for the picture that the camera sensor is input into be divided into multiple according to predetermined manner
Photosensitive unit, as shown in figure 1, picture can be divided into the photosensitive unit of specified number, is carried out picture in the embodiment of Fig. 1
Region division is 16 × 16 photosensitive units, altogether 256 photosensitive units,
Brightness collecting unit 30, is acquired for the brightness to photosensitive unit in picture, in above-mentioned camera exposure
In method, the calculating of brightness is required for being acquired brightness.
Additionally, also include the first luminance calculation unit 41, the brightness for calculating brightness highest photosensitive unit in picture,
The wherein calculating of brightness highest photosensitive unit can at least be carried out by following 3 kinds of modes：
1st, searched by way of comparing two-by-two；
2nd, start to be compared one by one by from the photosensitive unit that coordinate is (0,0)；
3rd, as shown in figure 1, by the first photosensitive area definition unit 61 will be defined as per adjacent 4 photosensitive units one it is photosensitive
Area, such as be that (0,0), (0,1), (1,0), (1,1) this 4 photosensitive units are defined as a photosensitive area by coordinate, by (0,1),
(0,2), (1,1), (1,2) this 4 photosensitive units are defined as another photosensitive area, by (1,0), (1,1), (2,0), (2,1) this 4
Individual photosensitive unit is defined as another photosensitive area, by that analogy, that is to say, that picture will be divided into 256 photosensitive areas, pass through
4th luminance calculation unit 44 calculates 4 mean flow rates of photosensitive unit in each photosensitive area, and the mean flow rate is second average
Brightness, it is last to be then by photosensitive unit most bright in the selection mean flow rate highest photosensitive area of the 5th luminance calculation unit 45
First brightness of brightness highest photosensitive unit in picture, in the present embodiment, it is also possible to do not use the 5th luminance calculation unit
45, and be directly picture by photosensitive unit most bright in the selection mean flow rate highest photosensitive area of the first luminance calculation unit 41
First brightness of middle brightness highest photosensitive unit.Adopt the speed and so that calculating knot that can effectively improve calculating in this way
Fruit is more accurate.It is determined that after most bright photosensitive unit, the brightness for recording the photosensitive unit is the first brightness.
Second luminance calculation unit 42, the first mean flow rate for calculating all photosensitive units in picture.It is of the invention
Preferred embodiment is provided：Calculate the mean flow rate of all photosensitive units in the picture by the following method：By first
Photosensitive area definition unit 61 defines photosensitive area, calculates the mean flow rate of all photosensitive areas and averages as the average bright of picture
Degree.Such as by the way that a photosensitive area will be defined as per adjacent 4 photosensitive units, such as by coordinate be (0,0), (0,1), (1,0),
(1,1) this 4 photosensitive units are defined as a photosensitive area, by (0,1), (0,2), (1,1), (1,2) this 4 photosensitive unit definition
It is another photosensitive area, (1,0), (1,1), (2,0), (2,1) this 4 photosensitive units is defined as another photosensitive area, with this
Analogize, the value of the mean flow rate of all photosensitive units in each photosensitive area is then calculated by the second luminance calculation unit 42, then
The first mean flow rate averaged as picture.
Finally, the first brightness using brightness highest photosensitive unit is average with first of all photosensitive units in picture bright
The carrying out of degree is calculated, and exposure brightness is obtained by the 3rd luminance calculation unit 43, then, according to the exposure brightness to the photograph
The picture of camera sensor input is processed and shown, wherein the formula for calculating exposure brightness is：
Exposure brightness=L × W+C × (1-W)；
Wherein L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.W is by exposing brightness regulation list
Unit 50 is adjusted.That is, user is during taking pictures, and as long as have selected PPT PowerPoint exposure modes, then can root
Calculated according to picture real-time detection, the first brightness of brightness highest photosensitive unit and all photosensitive units in picture are obtained in real time
First mean flow rate, then calculates exposure brightness, wherein during exposure brightness is calculated, can be set to coefficient value
Put to realize optimal exposure brightness.
In order to the device of the camera exposure uses more convenient, can be realized by preferred embodiment below real-time
Picture is analyzed.
Increase environment identifying unit 70, for judge the input of the camera sensor 10 picture whether centered on concentrate
Highlighted picture.The preferred embodiment below that decision method can be provided using the present invention：
Region definition is carried out to the photosensitive unit in picture by the second photosensitive area definition unit 62, as shown in figure 1, definition
Part A is surrounding photosensitive area, extension photosensitive area centered on part B, photosensitive area centered on C portion, while increasing to the picture
The first photosensitive unit quantitative analysis unit 81 that the quantity of middle brightness photosensitive unit high is counted, wherein, brightness sense high
The preferred embodiment that the determination of light unit can be provided using the present invention is carried out：First by area division unit 20 to picture
Each photosensitive unit brightness for obtained after region division carries out real-time detection, and it is first to choose brightness highest photosensitive unit brightness
Beginning maximum brightness, it is initial minimum brightness to choose the minimum photosensitive unit brightness of brightness, chooses maximum brightness with minimum brightness
Median, then by clustering algorithm, high, normal, basic three class is carried out to all photosensitive units in picture as initial intermediate luminance
Cluster, obtains the average value of brightness photosensitive unit high, the average value of middle brightness photosensitive unit and putting down for low-light level photosensitive unit
Average, then according to the average value of each colourity, clusters again, iterative calculation executed as described above, after average value does not change, with
The cluster result is defined, by the quantity of the first photosensitive unit quantitative analysis unit 81 photosensitive unit high to brightness in picture
Statistics.
And increase the 6th luminance calculation unit 46 of the mean flow rate for calculating photosensitive unit in surrounding photosensitive area A；
The 7th luminance calculation unit 47 for calculating the mean flow rate of the photosensitive unit of the center photosensitive area, for calculating center sense
Second photosensitive unit quantitative analysis unit 82 of the photosensitive unit quantity of light area and center extension photosensitive area, and first condition is sentenced
Order unit 91, for according to following condition to picture whether be PPT PowerPoints shoot judge,
The condition is：
The ratio of the mean flow rate of photosensitive unit and the mean flow rate of photosensitive unit in center photosensitive area C in surrounding photosensitive area A
Value is not more than first threshold, and the scope of first threshold is 0.95~1, it is ensured that picture center brightness is bright higher than surrounding photosensitive area
Degree, and center brightness local footprint area higher is relatively large.
Additionally, also to judge the quantity of the photosensitive unit quantity photosensitive unit high with brightness in picture in center photosensitive area C
Ratio be not less than Second Threshold, the scope of Second Threshold is 1.7~2, it is ensured that brightness photosensitive unit higher is focused primarily upon
Center photosensitive area C.
Finally, in addition it is also necessary to judge the quantity and the quantity of all photosensitive units in the picture of brightness photosensitive unit high
Ratio is between the 3rd threshold value and the 4th threshold value, wherein the 3rd threshold value is obtained with the 4th threshold value by repeatedly debugging, on-fixed
Value；That is, when brightness photosensitive unit high is too many, picture and the highlighted picture photographing of non-central concentration, when high brightness is single,
It is show as spot light or night scene more, non-PPT scenes, the scope of the 3rd threshold value is 0.45~0.55, and the scope of the 4th threshold value is
0.8~0.9.
If above-mentioned condition meets simultaneously, first condition identifying unit 91 judges that the picture shoots for PPT PowerPoints,
If meeting when above-mentioned condition is different, first condition identifying unit 91 judges that not PPT PowerPoints shoot the picture.
In order to more ensure the accuracy of judgement, it is necessary to increase second condition identifying unit 92, for according to the surrounding
The complexity of the photosensitive unit brightness of photosensitive area A to picture whether centered on concentrate highlighted picture to judge.The present invention is given
Mode is implemented as follows to detect above-mentioned complexity, including for calculating the quantity of the photosensitive unit of the surrounding photosensitive area A
The 3rd photosensitive unit quantitative analysis unit 83, further to picture whether be PPT PowerPoints shoot judge, judge bar
Part is the complexity of the photosensitive unit brightness for detecting the surrounding photosensitive area, and the computing formula of the complexity is：
Wherein, σ is the complexity of the photosensitive unit brightness of the surrounding photosensitive area, and C represents first mean flow rate, Xi
The brightness of each photosensitive unit in the surrounding photosensitive area is represented, N represents the quantity of the photosensitive unit of the surrounding photosensitive area；
Because when PPT is shot, the background of general surrounding photosensitive area is relatively simple, if environment is complicated, is not considered as PPT scenes, if
Environment is single, then it is assumed that be PPT scenes, so when the σ meets and is not more than five threshold values, then centered on judging the picture
Highlighted picture is concentrated, the scope of the 5th threshold value is 190-210, preferably 200.
The device of the camera exposure that the present invention is provided can effectively solve the PPT PowerPoints unsharp technology of shooting and ask
Topic.PPT shootings are carried out further, it is also possible to identify and be currently at, the image pickup method for then being provided by the present invention carries out high-quality
Shooting.It is to be noted that the device of camera exposure that the present invention is provided can be set on mobile terminals, such as mobile phone,
The equipment such as PAD, it is also possible to which being arranged on other has in the equipment of shoot function.
A1, a kind of method of camera exposure, the method include：
The picture that camera sensor is input into is divided into multiple photosensitive units according to predetermined manner；
Calculate the first brightness of brightness highest photosensitive unit in the picture；
Calculate the first mean flow rate of all photosensitive units in the picture；
The first brightness by the brightness highest photosensitive unit is flat with first of all photosensitive units in the picture
Equal brightness obtains exposure brightness；
The picture that the camera sensor is input into is processed and shown according to the exposure brightness.
The method of A2, camera exposure according to A1, the computing formula for obtaining exposure brightness is：Exposure brightness=L
×W+C×(1-W)；
Wherein, L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.
The method of A3, camera exposure according to A1, brightness highest photosensitive unit in the calculating picture
The first brightness, including：
A photosensitive area will be defined as per adjacent N number of photosensitive unit；
The mean flow rate of N number of photosensitive unit in each photosensitive area is calculated, the mean flow rate is the second mean flow rate；
The brightness for calculating brightness highest photosensitive unit in N number of photosensitive unit in the second mean flow rate highest photosensitive area is
First brightness.
The method of A4, camera exposure according to A1, the first of all photosensitive units in the calculating picture
Mean flow rate, including：
A photosensitive area will be defined as per adjacent N number of photosensitive unit；
The mean flow rate of N number of photosensitive unit in each photosensitive area is calculated, the mean flow rate is the second mean flow rate；
The average value of each mean flow rate of photosensitive area second is calculated, the average value is the first mean flow rate.
The method of A5, camera exposure according to A3 or A4, N values are not less than 4.
The method of A6, camera exposure according to any one of A1 to A4, brightness highest in the calculating picture
Photosensitive unit the first brightness before, also include：
Judge camera sensor input picture whether centered on concentrate highlighted picture, if then performing follow-up step
Suddenly.
The method of A7, camera exposure according to A6, judge the picture whether centered on concentrate highlighted picture, wrap
Include：
It is photosensitive centered on the picture is divided according to the division result of the multiple photosensitive units divided to the picture
Area, center extension photosensitive area and surrounding photosensitive area, the center photosensitive area is by the multiple in center in the picture
Photosensitive unit is constituted, and the center extension photosensitive area is made up of the multiple photosensitive units in the photosensitive area edge in center, and described four
All photosensitive areas are made up of the multiple photosensitive units in surrounding position in picture；
Calculate the quantity of the photosensitive unit high of brightness in the picture；
The mean flow rate of the photosensitive unit of the surrounding photosensitive area is calculated, the 3rd mean flow rate is obtained；
The mean flow rate of the photosensitive unit of the center photosensitive area is calculated, the 4th mean flow rate is obtained；
Calculate the quantity of the photosensitive unit of the center photosensitive area and center extension photosensitive area；
Meet following condition when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture：
3rd mean flow rate is not more than first threshold with the ratio of the 4th mean flow rate；
The quantity of the photosensitive unit of the center photosensitive area and center extension photosensitive area photosensitive unit high with brightness in picture
The ratio of quantity is not less than Second Threshold；
The ratio of the quantity of brightness photosensitive unit high and the quantity of all photosensitive units in the picture in the picture
Between the 3rd threshold value and the 4th threshold value.
The method of A8, camera exposure according to A7, calculates the quantity of the photosensitive unit high of brightness in the picture,
Including：
The brightness that each photosensitive unit after region division is carried out to the picture carries out real-time detection；
The first brightness of brightness highest photosensitive unit is chosen as initial maximum brightness；
The brightness for choosing the minimum photosensitive unit of brightness is initial minimum brightness；
Initial maximum brightness is chosen with the median of initial minimum brightness as initial intermediate luminance；
By clustering algorithm, according to initial maximum brightness, initial minimum brightness and initial intermediate luminance to institute in picture
There is photosensitive unit to be clustered, obtain the average value of brightness photosensitive unit high, the average value of the photosensitive unit of middle brightness and
The average value of the photosensitive unit of low-light level；
According to each average value, calculating is clustered and be iterated again, after each average value does not change, obtain final bright
The average value of degree photosensitive unit high, the average value of the photosensitive unit of final middle brightness and the photosensitive unit of final low-light level
Average value；
Clustered according to the average value of final brightness photosensitive unit high, resulting photosensitive unit quantity is bright in picture
Degree photosensitive unit quantity high.
The method of A9, camera exposure according to A7,
The scope of the first threshold is 0.95~1；
The scope of the Second Threshold is 1.7~2；
The scope of the 3rd threshold value is 0.45~0.55；
The scope of the 4th threshold value is 0.8~0.9.
The method of A10, camera exposure according to A7, judge the picture whether centered on concentrate highlighted picture
Condition also includes：
Detect the complexity of the photosensitive unit brightness of the surrounding photosensitive area.
The method of A11, camera exposure according to A10, also includes, calculates the photosensitive unit of the surrounding photosensitive area
Quantity；
The detection computing formula of the complexity is：
Wherein, σ is the complexity of the photosensitive unit brightness of the surrounding photosensitive area, and C represents first mean flow rate, Xi
The brightness of each photosensitive unit in the surrounding photosensitive area is represented, N represents the quantity of the photosensitive unit of the surrounding photosensitive area；
When the σ is not more than five threshold values, then judge to concentrate highlighted picture centered on the picture.
B12, a kind of device of camera exposure, described device include：
Camera sensor, for gathering picture；
Area division unit, for the picture that the camera sensor is input into be divided into multiple senses according to predetermined manner
Light unit；
Brightness collecting unit, is acquired for the brightness to photosensitive unit in the picture；
First luminance calculation unit, the first brightness for calculating brightness highest photosensitive unit in the picture；
Second luminance calculation unit, the first mean flow rate for calculating all photosensitive units in the picture；
Exposure brightness adjusting unit, for adjusting exposure brightness by adjustment factor；
3rd luminance calculation unit, for obtaining exposure brightness, the exposure brightness is by brightness highest in the picture
Photosensitive unit the first brightness with the picture all photosensitive units the first mean flow rate obtain.
B13, the device according to B12, obtain exposure brightness computing formula be：Exposure brightness=L × W+C × (1-
W)；
Wherein, L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.
B14, the device according to B12, also include：
First photosensitive area definition unit, for a photosensitive area will to be defined as per adjacent N number of photosensitive unit；
4th luminance calculation unit, the second mean flow rate for calculating N number of photosensitive unit in each photosensitive area.
B15, the device according to any one of B12 to B14,
Also include environment identifying unit, the environment identifying unit is used to judge the picture of the camera sensor input
Whether centered on concentrate highlighted picture.
B16, the device according to B15, also include：
Second photosensitive area definition unit, the division result of the multiple photosensitive units divided to the picture for basis will
Photosensitive area, center extension photosensitive area and surrounding photosensitive area centered on picture division, the center photosensitive area is by the picture
Multiple photosensitive units composition in center, the center extension photosensitive area is by the multiple sense in the photosensitive area edge in center
Light unit is constituted, and the surrounding photosensitive area is made up of the multiple photosensitive units in surrounding position in picture；
Also include, the first photosensitive unit quantitative analysis unit, for the number of the photosensitive unit high to brightness in the picture
Amount is counted；
6th luminance calculation unit, the mean flow rate of the photosensitive unit for calculating the surrounding photosensitive area obtains the 3rd
Mean flow rate；
7th luminance calculation unit, the mean flow rate of the photosensitive unit for calculating the center photosensitive area obtains the 4th
Mean flow rate；
Second photosensitive unit quantitative analysis unit, for calculating the photosensitive of the center photosensitive area and center extension photosensitive area
The quantity of unit；
And first condition identifying unit, for according to following condition to picture whether centered on concentrate the highlighted picture to carry out
Judge, meet following condition when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture：
3rd mean flow rate is not more than first threshold with the ratio of the 4th mean flow rate；
The quantity of the photosensitive unit of center photosensitive area and center extension photosensitive area and brightness highest photosensitive unit in picture
Quantity ratio be not less than Second Threshold；
The ratio of the quantity of brightness photosensitive unit high and the quantity of all photosensitive units in the picture in the picture
Between the 3rd threshold value and the 4th threshold value；
Meet conditions above when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture.
B17, the device according to B16, also including second condition identifying unit, for according to the surrounding photosensitive area
The complexity of photosensitive unit brightness to picture whether centered on concentrate highlighted picture to judge.
B18, the device according to B17, also include, the 3rd photosensitive unit quantitative analysis unit, for calculating described four
The quantity of the photosensitive unit of all photosensitive areas；
The detection computing formula of the complexity is：
Wherein, σ is the complexity of the photosensitive unit brightness of the surrounding photosensitive area, and C represents first mean flow rate, Xi
The brightness of each photosensitive unit in the surrounding photosensitive area is represented, N represents the quantity of the photosensitive unit of the surrounding photosensitive area；
When the σ is not more than five threshold values, then judge to concentrate highlighted picture centered on the picture.
C19, a kind of mobile terminal, including processor and memory：
The memory is used to store the program of A1 to A11 any one methods, and the processor is configurable for performing
The program stored in the memory.
Any technical scheme disclosed in the invention described above unless otherwise stated, if it discloses number range, then
Disclosed number range is preferred number range, it is any it should be appreciated by those skilled in the art：Preferred number range
The only obvious or representative numerical value of technique effect in many enforceable numerical value.Because numerical value is more, it is impossible to
Exhaustion, so just open component values of the invention are to illustrate technical scheme, also, the above-mentioned numerical value enumerated is not
The limitation to the invention protection domain should be constituted.
If the words such as " first ", " second " are used herein to limit parts, those skilled in the art should
This knows：" first ", the use of " second " are intended merely to facilitate in description and parts are distinguished such as no Stated otherwise
Outward, above-mentioned word does not have special implication.
In addition, the art for representing position relationship or shape applied in any technical scheme disclosed in the invention described above
Its implication includes approximate with its, similar or close state or shape to language unless otherwise stated.The either component that the present invention is provided
Both can be to be assembled by multiple individually parts, it is also possible to the separate part that the technique that is one of the forming is manufactured.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to preferred embodiment to the present invention, and those of ordinary skill in the art should be understood：Still
Specific embodiment of the invention can be modified or equivalent is carried out to some technical characteristics；Without deviating from this hair
The spirit of bright technical scheme, it all should cover in the middle of claimed technical scheme scope of the invention.
Claims (10)
1. a kind of method of camera exposure, it is characterised in that the method includes：
The picture that camera sensor is input into is divided into multiple photosensitive units according to predetermined manner；
Calculate the first brightness of brightness highest photosensitive unit in the picture；
Calculate the first mean flow rate of all photosensitive units in the picture；
It is average with first of all photosensitive units in the picture bright by the first brightness of the brightness highest photosensitive unit
Degree obtains exposure brightness；
The picture that the camera sensor is input into is processed and shown according to the exposure brightness.
2. the method for camera exposure according to claim 1, it is characterised in that obtain the computing formula of exposure brightness
For：Exposure brightness=L × W+C × (1-W)；
Wherein, L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.
3. the method for camera exposure according to claim 1, it is characterised in that brightness is most in the calculating picture
First brightness of photosensitive unit high, including：
A photosensitive area will be defined as per adjacent N number of photosensitive unit；
The mean flow rate of N number of photosensitive unit in each photosensitive area is calculated, the mean flow rate is the second mean flow rate；
The brightness for calculating brightness highest photosensitive unit in N number of photosensitive unit in the second mean flow rate highest photosensitive area is first
Brightness.
4. the method for camera exposure according to claim 1, it is characterised in that institute's thoughts in the calculating picture
First mean flow rate of light unit, including：
A photosensitive area will be defined as per adjacent N number of photosensitive unit；
The mean flow rate of N number of photosensitive unit in each photosensitive area is calculated, the mean flow rate is the second mean flow rate；
The average value of each mean flow rate of photosensitive area second is calculated, the average value is the first mean flow rate.
5. a kind of device of camera exposure, it is characterised in that described device includes：
Camera sensor, for gathering picture；
Area division unit, the picture for the camera sensor to be input into is divided into multiple photosensitive lists according to predetermined manner
Unit；
Brightness collecting unit, is acquired for the brightness to photosensitive unit in the picture；
First luminance calculation unit, the first brightness for calculating brightness highest photosensitive unit in the picture；
Second luminance calculation unit, the first mean flow rate for calculating all photosensitive units in the picture；
Exposure brightness adjusting unit, for adjusting exposure brightness by adjustment factor；
3rd luminance calculation unit, for obtaining exposure brightness, the exposure brightness is by brightness highest sense in the picture
First brightness of light unit is obtained with the first mean flow rate of all photosensitive units in the picture.
6. device according to claim 5, it is characterised in that the computing formula for obtaining exposure brightness is：Exposure brightness=L
×W+C×(1-W)；
Wherein, L is the first brightness, and C is the first mean flow rate, and W is the coefficient that can be adjusted.
7. device according to claim 5, it is characterised in that also include：
First photosensitive area definition unit, for a photosensitive area will to be defined as per adjacent N number of photosensitive unit；
4th luminance calculation unit, the second mean flow rate for calculating N number of photosensitive unit in each photosensitive area.
8. the device according to any one of claim 5 to 7, it is characterised in that
Also include environment identifying unit, the environment identifying unit be used to judging camera sensor input picture whether
Centered on concentrate highlighted picture.
9. device according to claim 8, it is characterised in that also include：
Second photosensitive area definition unit, the division result of the multiple photosensitive units divided to the picture for basis, by picture
Photosensitive area, center extension photosensitive area and surrounding photosensitive area centered on division, the center photosensitive area in the picture by being in
Multiple photosensitive units composition of center, the center extension photosensitive area is by the multiple photosensitive list in the photosensitive area edge in center
Unit's composition, the surrounding photosensitive area is made up of the multiple photosensitive units in surrounding position in picture；
Also include, the first photosensitive unit quantitative analysis unit, the quantity for the photosensitive unit high to brightness in the picture is entered
Row statistics；
6th luminance calculation unit, the mean flow rate of the photosensitive unit for calculating the surrounding photosensitive area obtains the 3rd average
Brightness；
7th luminance calculation unit, the mean flow rate of the photosensitive unit for calculating the center photosensitive area obtains the 4th average
Brightness；
Second photosensitive unit quantitative analysis unit, the photosensitive unit for calculating the center photosensitive area and center extension photosensitive area
Quantity；
And first condition identifying unit, for according to following condition to picture whether centered on concentrate highlighted picture to sentence
It is disconnected, meet following condition when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture：
3rd mean flow rate is not more than first threshold with the ratio of the 4th mean flow rate；
The number of brightness highest photosensitive unit in the quantity and picture of the photosensitive unit of center photosensitive area and center extension photosensitive area
The ratio of amount is not less than Second Threshold；
The quantity of brightness photosensitive unit high is in the ratio of the quantity of all photosensitive units in the picture in the picture
Between 3rd threshold value and the 4th threshold value；
Meet conditions above when simultaneously, it is determined that highlighted picture photographing is concentrated centered on the picture.
10. a kind of mobile terminal, it is characterised in that including processor and memory：
The memory is used to store the program of Claims 1-4 any one method, and the processor is configurable for performing
The program stored in the memory.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989701A (en) * | 2018-04-24 | 2018-12-11 | 虹光精密工业股份有限公司 | Imaging device and imaging method |
| CN110784659A (en) * | 2019-10-31 | 2020-02-11 | Oppo广东移动通信有限公司 | Exposure control method and device and storage medium |
| CN111491108A (en) * | 2019-01-28 | 2020-08-04 | 杭州海康威视数字技术股份有限公司 | Exposure parameter adjusting method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067871A (en) * | 2007-06-29 | 2007-11-07 | 北京大学 | High-light area selecting method used for visual convex shell drawing and device threof |
| CN101365070A (en) * | 2007-08-06 | 2009-02-11 | 株式会社尼康 | Imaging apparatus |
| CN101399924A (en) * | 2007-09-25 | 2009-04-01 | 展讯通信（上海）有限公司 | Automatic exposure method and device based on brightness histogram |
| CN105812667A (en) * | 2016-04-15 | 2016-07-27 | 张磊 | System and method for photographing PPT rapidly |
| CN105959594A (en) * | 2016-06-30 | 2016-09-21 | 北京小米移动软件有限公司 | Metering method and device for photographic equipment |
-
2017
- 2017-01-22 CN CN201710047281.XA patent/CN106773453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067871A (en) * | 2007-06-29 | 2007-11-07 | 北京大学 | High-light area selecting method used for visual convex shell drawing and device threof |
| CN101365070A (en) * | 2007-08-06 | 2009-02-11 | 株式会社尼康 | Imaging apparatus |
| CN101399924A (en) * | 2007-09-25 | 2009-04-01 | 展讯通信（上海）有限公司 | Automatic exposure method and device based on brightness histogram |
| CN105812667A (en) * | 2016-04-15 | 2016-07-27 | 张磊 | System and method for photographing PPT rapidly |
| CN105959594A (en) * | 2016-06-30 | 2016-09-21 | 北京小米移动软件有限公司 | Metering method and device for photographic equipment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108989701A (en) * | 2018-04-24 | 2018-12-11 | 虹光精密工业股份有限公司 | Imaging device and imaging method |
| CN111491108A (en) * | 2019-01-28 | 2020-08-04 | 杭州海康威视数字技术股份有限公司 | Exposure parameter adjusting method and device |
| CN111491108B (en) * | 2019-01-28 | 2022-12-09 | 杭州海康威视数字技术股份有限公司 | Exposure parameter adjusting method and device |
| CN110784659A (en) * | 2019-10-31 | 2020-02-11 | Oppo广东移动通信有限公司 | Exposure control method and device and storage medium |
| CN110784659B (en) * | 2019-10-31 | 2022-01-11 | Oppo广东移动通信有限公司 | Exposure control method and device and storage medium |
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