CN105187728B - Photographic method and device - Google Patents
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- CN105187728B CN105187728B CN201510648645.0A CN201510648645A CN105187728B CN 105187728 B CN105187728 B CN 105187728B CN 201510648645 A CN201510648645 A CN 201510648645A CN 105187728 B CN105187728 B CN 105187728B
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Abstract
The present invention relates to a kind of photographic method and devices.The method includes the steps: when receiving photographing instruction, the time for exposure under current photo environment from the default time for exposure is foreshortened into the new time for exposure, and the sensitivity under current photo environment is improved from default sensitivity to new sensitivity；An at least photo is shot according to the photographing instruction；Clearest photo is chosen from each photo, using the photo of selection as basic photo；The noise that the basic photo is determined according to each photo carries out noise reduction to the noise.The present invention is realized using software approach, both can largely be improved under light environment and half-light environment, especially take pictures under half-light environment easy paste the problem of, and will not influence the industrial design moulding of camera module thickness and intelligent terminal, reduce costs.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of photographic method and device.
Background technique
With the development of intelligent terminal, the camera function of intelligent terminal (such as smart phone etc.) is required also increasingly
It is high.When being taken pictures using intelligent terminal, it is easy to cause bat paste, photo not clear enough because of shake, especially in environment
It is easier to clap paste in the case where partially dark.
In view of the above-mentioned problems, current method generally uses optical anti-vibration technology.But optical anti-vibration belongs to hardware stabilization,
There are following two points defects: one, increasing cost；Two, increase camera module thickness, and then influence the thickness of intelligent terminal and whole
Figure modelling.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of photographic method and device, can be solved by software approach
Take pictures easy paste the problem of.
In order to achieve the above object, the present invention uses following scheme:
A kind of photographic method, comprising steps of
When receiving photographing instruction, by the time for exposure under current photo environment from default the time for exposure foreshorten to it is new
Time for exposure, and the sensitivity under current photo environment is improved from default sensitivity to new sensitivity；
An at least photo is shot according to the photographing instruction；
Clearest photo is chosen from each photo, using the photo of selection as basic photo；
The noise that the basic photo is determined according to each photo carries out noise reduction to the noise.
A kind of camera arrangement, comprising:
Time and sensitivity setup module, for when receiving photographing instruction, when by exposure under current photo environment
Between from the default time for exposure foreshorten to the new time for exposure, and the sensitivity under current photo environment is improved from default sensitivity
To new sensitivity；
Photo obtains module, for shooting an at least photo according to the photographing instruction；
Photo choose module, for choosing clearest photo from each photo, using the photo of selection as
Basic photo；
Noise noise reduction module carries out the noise for determining the noise of the basic photo according to each photo
Noise reduction.
Photographic method and device of the present invention, since the time for exposure is longer, the probability that photo claps paste is bigger, so being clapped
According to when, shorten the time for exposure of default, thus reduce clap paste probability.Meanwhile in order to guarantee sensitive volume, sensitivity is improved.By
The noise of meeting enlarged photograph is got higher in sensitivity, the quality of the photo of shooting is influenced, so the present invention first finds out clearest photograph
Then piece carries out multiframe noise reduction process to the photo, to obtain the photo of shooting clear in the case where reducing and clapping paste probability.
The present invention is realized using software approach, both can largely be improved under light environment and half-light environment, especially half-light environment
Under take pictures easy paste the problem of, and will not influence the industrial design moulding of camera module thickness and intelligent terminal, reduce costs.
Detailed description of the invention
Fig. 1 is the flow diagram of photographic method embodiment of the present invention；
Fig. 2 is the process signal that the present invention chooses clearest photo embodiment according to the luminance information of each photo
Figure；
Fig. 3 is the flow diagram of step S140 embodiment of the present invention；
Fig. 4 is the structural schematic diagram of camera arrangement embodiment of the present invention；
Fig. 5 is the structural schematic diagram of time and sensitivity setup module embodiment one of the invention；
Fig. 6 is the structural schematic diagram of time and sensitivity setup module embodiment two of the invention；
Fig. 7 is the structural schematic diagram that photo of the present invention chooses module embodiments；
Fig. 8 is the structural schematic diagram of noise noise reduction module embodiment of the present invention.
Specific embodiment
Technical problems to be solved, the technical solution taken and the technology reached effect in order to better understand the present invention
Fruit is with reference to the accompanying drawing described in detail a specific embodiment of the invention.
As shown in Figure 1, a kind of photographic method, comprising steps of
S110, when receiving photographing instruction, by the time for exposure under current photo environment from default the time for exposure shorten
It is improved from default sensitivity to new sensitivity to the new time for exposure, and by the sensitivity under current photo environment；
S120, an at least photo is shot according to the photographing instruction；
S130, clearest photo is chosen from each photo, using the photo of selection as basic photo；
S140, the noise that the basic photo is determined according to each photo carry out noise reduction to the noise.
Since the time for exposure is longer, the probability that photo claps paste is bigger, so the present invention when taking pictures, shortens default
Time for exposure, to reduce the probability for clapping paste.Meanwhile in order to guarantee sensitive volume, the present invention improves sensitivity.Since sensitivity becomes
The noise of height meeting enlarged photograph, influences the quality of the photo of shooting, so the present invention first finds out clearest photo, then to this
Photo carries out multiframe noise reduction process, to obtain the photo of shooting clear.The present invention, both can be very using software approach realization
Big degree improves under light environment and half-light environment, especially take pictures under half-light environment easy paste the problem of, and will not influence camera shooting
The industrial design moulding of head mould group thickness and intelligent terminal, reduces costs.
Default the time for exposure include under light environment default the time for exposure and half-light environment under the default time for exposure, two
Defaulting the time for exposure is determining value, for example, the default time for exposure under the light environment of certain camera is 0.5 second, half-light ring
Time for exposure under border is 2 seconds.Equally, default sensitivity also includes under the default sensitivity and half-light environment under light environment
Default sensitivity, two default sensitivity are also determining value.
The default time for exposure specifically shortens how much can be configured according to actual needs, for example, in one embodiment,
By the time for exposure under current photo environment from default the time for exposure foreshorten to the new time for exposure the step of may include:
Time for exposure under current photo environment from the default time for exposure is shorten to the default time for exposure；
Or,
A time for exposure is chosen from each time for exposure for being less than the default time for exposure according to preset condition；
Time for exposure under current photo environment is shorten to the time for exposure of selection from the default time for exposure.
The default time for exposure will shorten to the default time for exposure, be shorten to each default time for exposure one it is fixed
Value, such as 1/30S (second) etc..The new exposure under the new time for exposure and half-light environment under light environment can be respectively set
Time can also set a fixation for the new time for exposure under the new time for exposure and half-light environment under light environment
Value.The default time for exposure it will be shorten to the time for exposure chosen, then the degree that the default time for exposure shortens every time is possible different.
User can be actually needed setting preset condition, such as environment is darker, and the degree that the default time for exposure shortens is bigger etc..Due to exposing
Smaller between light time, the probability for clapping paste is lower, so the present invention shortens the time for exposure and the probability for clapping paste can be effectively reduced.
Sensitive volume=sensitivity (ISO) the * time for exposure, in order to guarantee sensitive volume, shorten default the time for exposure when, also phase
The raising default sensitivity answered.The method that sensitivity is increased to new sensitivity will be defaulted will shorten the default time for exposure with above-mentioned
Method for the new time for exposure is similar, and it will not be described here.Due to improving the noise of sensitivity meeting enlarged photograph, photo is influenced
Quality, so after setting time for exposure and sensitive volume, in order to obtain clear photograph, it is also necessary to be done to the photo taken pictures
It is further processed.
In order to obtain clear photograph, generally requires and be continuously shot multiple full-scale photos, then from multiple pictures
Choose a clearest photo.Due to shortening the time for exposure, it is ensured that frame per second quickly, therefore obtains multiple pictures simultaneously
It is time-consuming shorter.Obtaining full-scale photo simultaneously can be realized by existing method in the prior art, such as mtk and high pass
Zero second snap etc..A full-scale photo can also be only shot, then this photo is i.e. as clearest photo.At one
In embodiment, the step of choosing clearest photo from each photo, may include:
Clearest photo is chosen according to the luminance information of each photo.
In one embodiment, the present invention chooses frame algorithm according to luminance information use and obtains clearest photo, i.e., such as Fig. 2
Shown, the step of choosing clearest photo according to the luminance information of each photo, may include:
S1301, determine that the brightness value difference of the neighbor pixel of each photo in each photo is greater than predetermined luminance
The number of threshold value；
S1302, using the largest number of photos as clearest photo.
The brightness value difference of neighbor pixel in each photo is calculated respectively, determines the brightness of each photo
Value difference value is greater than the number of predetermined luminance threshold value, namely obtains the number of the high fdrequency component of each photo.Predetermined luminance threshold value
It can be configured according to actual needs, for example, 50 etc..After obtaining the corresponding number of every photo, managed according to Fourier Optics
By using the largest number of photos as clearest photo, also i.e. using the most photo of high fdrequency component as clearest photo.
Other than determining clearest photo using method provided by the invention, other modes in the prior art, example can also be used
Such as edge detection method chooses clearest photo from same multiple pictures.
After obtaining clearest basic photo, need to carry out noise reduction process to the basic photo, to obtain clear photograph.
The present invention carries out noise reduction process to basic photo using the method for multiframe noise reduction, for example, in one embodiment, as shown in figure 3,
Step S140 may include:
S1401, the previewing photos that each photo is obtained according to each photo；It is obtained according to each photo corresponding
Previewing photos can be realized according to existing mode in the prior art；
S1402, the noise that the basic photo is determined according to the noise information of each previewing photos；
S1403, noise reduction is carried out to the noise according to the information of the pixel adjacent with the noise of the basic photo.
According to the randomness of noise, do multiframe auxiliary noise reduction using the previewing photos of small size, can speed up processing,
It again can be than accurately finding the noise position of basic photo.It, can be using the side such as interpolation after the noise for determining basic photo
Method carries out noise reduction process using the information of the noise adjacent pixels point of basic photo, to obtain clear photograph.It needs to illustrate
Be, the present invention is not limited to the method for above-mentioned multiframe noise reduction, can also using other noise-reduction methods in the prior art to photo into
Row processing.
Based on the same inventive concept, the present invention also provides a kind of camera arrangements, with reference to the accompanying drawing to apparatus of the present invention
Specific embodiment is described in detail.
As shown in figure 4, a kind of camera arrangement, comprising:
Time and sensitivity setup module 110, for when receiving photographing instruction, by the exposure under current photo environment
Time from the default time for exposure foreshortens to the new time for exposure, and the sensitivity under current photo environment is mentioned from default sensitivity
Up to new sensitivity；
Photo obtains module 120, for shooting an at least photo according to the photographing instruction；
Photo chooses module 130, and for choosing clearest photo from each photo, the photo of selection is made
For basic photo；
Noise noise reduction module 140, for determining the noise of the basic photo according to each photo, to the noise into
Row noise reduction.
Since the time for exposure is longer, the probability that photo claps paste is bigger, so the present invention when taking pictures, shortens default
Time for exposure, to reduce the probability for clapping paste.Meanwhile in order to guarantee sensitive volume, the present invention improves sensitivity.Since sensitivity becomes
The noise of height meeting enlarged photograph, influences the quality of the photo of shooting, so the present invention first finds out clearest photo, then to this
Photo carries out multiframe noise reduction process, to obtain the photo of shooting clear.The present invention, both can be very using software approach realization
Big degree improves under light environment and half-light environment, especially take pictures under half-light environment easy paste the problem of, and will not influence camera shooting
The industrial design moulding of head mould group thickness and intelligent terminal, reduces costs.
Default the time for exposure include under light environment default the time for exposure and half-light environment under the default time for exposure, two
Defaulting the time for exposure is determining value.Equally, default sensitivity also includes the default sensitivity and half-light environment under light environment
Under default sensitivity, two default sensitivity be also determining value.
In one embodiment, as shown in figure 5, the time and sensitivity setup module 110 may include:
First time for exposure setting unit 1101, time for exposure from the default time for exposure for will currently focus under environment
It shorten to the default time for exposure；
Or, as shown in fig. 6, in another embodiment, the time and sensitivity setup module 110 may include:
Time for exposure selection unit 1102, when for according to preset condition from less than each exposure for defaulting the time for exposure
Between one time for exposure of middle selection；
Second time for exposure setting unit 1103, time for exposure from the default time for exposure for will currently focus under environment
It shorten to the time for exposure chosen.
The default time for exposure will shorten to the default time for exposure, be shorten to each default time for exposure one it is fixed
Value.The new time for exposure under the new time for exposure and half-light environment under light environment can be respectively set, it can also will be bright
The new time for exposure under new time for exposure and half-light environment under luminous environment is set as a fixed value.When by default exposure
Between shorten to the time for exposure chosen, then the degree that the default time for exposure shortens every time may be different.User can actually need
Preset condition is set, such as environment is darker, the degree that the default time for exposure shortens is bigger etc..Since the time for exposure is smaller, clap
The probability of paste is lower, so the present invention shortens the time for exposure and the probability for clapping paste can be effectively reduced.
Photo obtains module 120 and generally requires multiple full-scale photos of acquisition, to guarantee the clarity of final photo.?
In one embodiment, photo, which chooses module 130, can choose clearest photo according to the luminance information of each photo.Such as figure
Shown in 7, the photo chooses module 130 and may include:
Number decision unit 1301, for determining the brightness value difference of the neighbor pixel of each photo in each photo
Value is greater than the number of predetermined luminance threshold value；
Photo selection unit 1302, for using the largest number of photos as clearest photo.
It should be noted that the photo chooses module 130 other than determining clearest photo using the above method, also
Other modes in the prior art, such as edge detection method etc. can be used.
After the photo selection module 130 obtains clearest basic photo, noise noise reduction module 140 is needed to the basis
Photo carries out noise reduction process, to obtain clear photograph.In one embodiment, as shown in figure 8, the noise noise reduction module
140 may include:
Previewing photos acquiring unit 1401, for obtaining the previewing photos of each photo according to each photo；
Noise determination unit 1402, for determining making an uproar for the basic photo according to the noise information of each previewing photos
Point；
Noise reduction unit 1403, for the information according to the pixel adjacent with the noise of the basic photo to the noise
Carry out noise reduction.
It should be noted that the method that the noise noise reduction module 140 is not limited to above-mentioned multiframe noise reduction, can also use
Other noise-reduction methods handle photo in the prior art.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of photographic method, which is characterized in that comprising steps of
When receiving photographing instruction, the time for exposure under current photo environment is foreshortened into new exposure from the default time for exposure
Time, and the sensitivity under current photo environment is improved from default sensitivity to new sensitivity；
An at least photo is shot according to the photographing instruction；
Clearest photo is chosen from each photo, using the photo of selection as basic photo；
The noise that the basic photo is determined according to each photo carries out noise reduction to the noise；
The noise that the basic photo is determined according to each photo, to the noise carry out noise reduction the step of include:
The previewing photos of each photo are obtained according to each photo；
The noise of the basic photo is determined according to the noise information of each previewing photos；
Noise reduction is carried out according to noise of the information of the pixel adjacent with the noise of the basic photo to the basic photo；
The default time for exposure includes the default time for exposure under light environment and the default time for exposure under half-light environment.
2. photographic method according to claim 1, which is characterized in that choose clearest photo from each photo
Step includes:
Clearest photo is chosen according to the luminance information of each photo.
3. photographic method according to claim 2, which is characterized in that chosen according to the luminance information of each photo most clear
The step of clear photo includes:
Determine that the brightness value difference of the neighbor pixel of each photo in each photo is greater than the number of predetermined luminance threshold value；
Using the largest number of photos as clearest photo.
4. according to claim 1 to photographic method described in 3 any one, which is characterized in that by the exposure under current photo environment
Between light time from default the time for exposure foreshorten to the new time for exposure the step of include:
Time for exposure under current photo environment from the default time for exposure is shorten to the default time for exposure；
Or,
A time for exposure is chosen from each time for exposure for being less than the default time for exposure according to preset condition；
Time for exposure under current photo environment is shorten to the time for exposure of selection from the default time for exposure.
5. a kind of camera arrangement characterized by comprising
Time and sensitivity setup module, for when receiving photographing instruction, by the time for exposure under current photo environment from
The default time for exposure foreshortens to the new time for exposure, and the sensitivity under current photo environment is improved from default sensitivity to new
Sensitivity；
Photo obtains module, for shooting an at least photo according to the photographing instruction；
Photo chooses module, for choosing clearest photo from each photo, based on the photo of selection
Photo；
Noise noise reduction module carries out noise reduction to the noise for determining the noise of the basic photo according to each photo；
The noise noise reduction module includes:
Previewing photos acquiring unit, for obtaining the previewing photos of each photo according to each photo；
Noise determination unit, for determining the noise of the basic photo according to the noise information of each previewing photos；
Noise reduction unit, for being made an uproar according to the information of the pixel adjacent with the noise of the basic photo to the basic photo
Point carries out noise reduction；
The default time for exposure includes the default time for exposure under light environment and the default time for exposure under half-light environment.
6. camera arrangement according to claim 5, which is characterized in that the photo chooses module according to each photo
Luminance information chooses clearest photo.
7. camera arrangement according to claim 6, which is characterized in that the photo chooses module and includes:
Number decision unit, for determining that it is pre- that the brightness value difference of the neighbor pixel of each photo in each photo is greater than
If the number of luminance threshold；
Photo selection unit, for using the largest number of photos as clearest photo.
8. according to camera arrangement described in claim 5 to 7 any one, which is characterized in that the time and sensitivity setting
Module includes:
First time for exposure setting unit, it is pre- for the time for exposure under current photo environment to shorten to from the default time for exposure
If the time for exposure；
Or,
Time for exposure selection unit, for being chosen from each time for exposure for being less than the default time for exposure according to preset condition
One time for exposure；
Second time for exposure setting unit, for the time for exposure under current photo environment to shorten to select from the default time for exposure
The time for exposure taken.
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| CN105763813A (en) * | 2016-04-05 | 2016-07-13 | 广东欧珀移动通信有限公司 | Photographing method, device and intelligent terminal |
| CN106060249B (en) * | 2016-05-19 | 2020-02-21 | 维沃移动通信有限公司 | Photographing anti-shake method and mobile terminal |
| CN106530225A (en) * | 2016-10-31 | 2017-03-22 | 黄建文 | Network group-photo-taking system and method |
| CN106657806B (en) * | 2017-01-24 | 2019-12-03 | 维沃移动通信有限公司 | A kind of exposure method and mobile terminal |
| CN107230192B (en) * | 2017-05-31 | 2020-07-21 | Oppo广东移动通信有限公司 | Image processing method, image processing device, computer-readable storage medium and mobile terminal |
| CN107424128B (en) * | 2017-06-20 | 2020-12-29 | 南京泰立瑞信息科技有限公司 | Method and system for extracting clear image frame from recorded eye fundus video |
| CN115294672A (en) * | 2022-02-09 | 2022-11-04 | 浙江智马达智能科技有限公司 | Vehicle-mounted camera-based driving recording method and system |
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