CN107948538A - Imaging method, device, mobile terminal and storage medium - Google Patents
Imaging method, device, mobile terminal and storage medium Download PDFInfo
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- CN107948538A CN107948538A CN201711124811.2A CN201711124811A CN107948538A CN 107948538 A CN107948538 A CN 107948538A CN 201711124811 A CN201711124811 A CN 201711124811A CN 107948538 A CN107948538 A CN 107948538A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 67
- 238000003860 storage Methods 0.000 title abstract description 15
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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Abstract
A kind of imaging method of disclosure, device, mobile terminal and storage medium, wherein, method includes：When picture of finding a view belongs to target scene, identify in picture of finding a view and whether include portrait, wherein, the background of target scene is in dim light state, if including portrait in picture of finding a view, the sensitivity ISO of camera is turned down, and opens flash lamp and light filling is carried out to portrait, in the state of flash lamp unlatching, picture of finding a view is shot using the camera.When being shot under background is in the target scene of dim light state to personage, background luminance is forced down by the sensitivity ISO for turning down camera, light filling is carried out to portrait by opening flash lamp, it is achieved thereby that background luminance is forced down at the same time and lifts the effect of people's image brightness, shooting effect is improved, solves the technical problem that cannot realize the effect forced down background luminance and lift people's image brightness at the same time in the prior art.
Description
Technical field
This application involves technical field of image processing, more particularly to a kind of imaging method, device, mobile terminal and storage to be situated between
Matter.
Background technology
In recent years, the camera module technology of mobile terminal has larger development, the photo shot using mobile terminal
Image quality is become better and better.But since the size of mobile terminal and camera module is smaller, shooting effect and the specialty of mobile terminal are taken the photograph
As equipment is compared to still there are a certain distance.
Part scene in daily life, the video or photo of mobile terminal shooting are unable to reach preferable effect.Example
Such as setting sun scene, when being shot using the setting sun as background to people, join if camera module automatically adjusts shooting according to photographed scene
Number, may result in background overexposure, and portrait may be owed to expose, and influence overall shooting effect.
Apply for content
The application provides a kind of imaging method, device, mobile terminal and storage medium, and the mesh of dim light state is in background
When being shot under mark scene to personage, the sensitivity ISO by turning down camera forces down background luminance, and opens flash lamp pair
Portrait carries out light filling, to realize the effect for forcing down background luminance and lifting people's image brightness at the same time, improves shooting effect.
The embodiment of the present application provides a kind of imaging method, including：
When picture of finding a view belongs to target scene, whether portrait is included in picture of finding a view described in identification；The target scene
Background be in dim light state；
If including portrait in the picture of finding a view, the sensitivity ISO of camera is turned down；
Open flash lamp and light filling is carried out to portrait；
In the state of flash lamp unlatching, using picture of finding a view described in camera shooting.
The imaging method of the embodiment of the present application, by the way that when picture of finding a view belongs to target scene, identifying in picture of finding a view is
It is no to include portrait, wherein, the background of target scene is in dim light state, if including portrait in picture of finding a view, turns down camera
Sensitivity ISO, and open flash lamp and light filling is carried out to portrait, in the state of flash lamp unlatching, found a view using camera shooting
Picture.In the present embodiment, when being shot under background is in the target scene of dim light state to personage, by turning down camera
Sensitivity ISO force down background luminance, by open flash lamp to portrait carry out light filling, it is achieved thereby that it is bright to force down background at the same time
The effect of degree and lifting people's image brightness, improves shooting effect, and solving cannot realize that to force down background bright at the same time in the prior art
The technical problem of the effect of degree and lifting people's image brightness.
Another embodiment of the application provides a kind of imaging device, including：
Identification module, for whether including portrait in picture of when picture of finding a view belongs to target scene, finding a view described in identification；
The background of the target scene is in dim light state；
Module is adjusted, if for including portrait in the picture of finding a view, turns down the sensitivity ISO of camera；
Supplementary lighting module, light filling is carried out for opening flash lamp to portrait；
Control module, in the state of being opened in the flash lamp, using picture of finding a view described in camera shooting.
The imaging device of the embodiment of the present application, by the way that when picture of finding a view belongs to target scene, identifying in picture of finding a view is
It is no to include portrait, wherein, the background of target scene is in dim light state, if including portrait in picture of finding a view, turns down camera
Sensitivity ISO, and open flash lamp and light filling is carried out to portrait, in the state of flash lamp unlatching, found a view using camera shooting
Picture.In the present embodiment, when being shot under background is in the target scene of dim light state to personage, by turning down camera
Sensitivity ISO force down background luminance, by open flash lamp to portrait carry out light filling, it is achieved thereby that it is bright to force down background at the same time
The effect of degree and lifting people's image brightness, improves shooting effect, and solving cannot realize that to force down background bright at the same time in the prior art
The technical problem of the effect of degree and lifting people's image brightness.
The another embodiment of the application provides a kind of mobile terminal, including：Camera, flash lamp, memory, processor and deposit
The computer program that can be run on a memory and on a processor is stored up, when the processor performs described program, is realized as above
State the imaging method described in the embodiment of the present application.
The application another embodiment provides a kind of computer-readable recording medium, is stored thereon with computer program, the journey
The imaging method as described in the above embodiments of the present application is realized when sequence is executed by processor.
The aspect and advantage that the application adds will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the application.
Brief description of the drawings
The above-mentioned and/or additional aspect of the application and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is a kind of flow diagram of imaging method provided by the embodiments of the present application；
Fig. 2 is the flow diagram of another imaging method provided by the embodiments of the present application；
Fig. 3 is the flow diagram of another imaging method provided by the embodiments of the present application；
Fig. 4 is the principle schematic of range of triangle；
Fig. 5 is the structure diagram of a kind of imaging device provided by the embodiments of the present application；
Fig. 6 is the structure diagram of another imaging device provided by the embodiments of the present application；
Fig. 7 is a kind of structure diagram of mobile terminal provided by the embodiments of the present application；
Fig. 8 is the schematic diagram of image processing circuit in one embodiment.
Embodiment
Embodiments herein is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the application, and it is not intended that limitation to the application.
Below with reference to the accompanying drawings the imaging method, device, mobile terminal and storage medium of the embodiment of the present application are described.
Background is in dim light state in part scene in daily life, and hereinafter referred to as this kind of background is in dim light state
Scene is target scene.Under target scene, background is while in dim light state, but background stills need blur-free imaging.And carry on the back
Scape generally comprises light source, when causing that portrait is in backlight state under target scene, minutia can not blur-free imaging, mobile terminal
The video comprising portrait or photo of shooting are unable to reach preferable effect.
Such as target scene is when being setting sun scene or southern exposure scene, it is necessary to which background and portrait can under this kind of scene
More visible imaging.But in fact, since background includes light source, and people is between light source and camera, and it is backlight to cause portrait
State.But this backlight is different from backlight under normal circumstances, under this scene the brightness of background be more than the same of the brightness of portrait
When, the brightness of background is overall partially dark, and the dim light state of first threshold brightness is less than in average brightness, if camera module according to
Average brightness automatically adjusts acquisition parameters, may result in brightness in background and is excessively exposed higher than the source region of second threshold brightness
Light, and portrait may be owed to expose, meanwhile, in image, background is overall to have distortion due to excessively bright, influences overall bat
Take the photograph effect.
For this problem, the application proposes a kind of imaging method, right in the case where background is in the target scene of dim light state
When personage is shot, the sensitivity ISO by turning down camera forces down background luminance, and opens flash lamp and portrait is mended
Light, to realize the effect for forcing down background luminance and lifting people's image brightness at the same time, improves shooting effect.
Fig. 1 is a kind of flow diagram of imaging method provided by the embodiments of the present application.
As shown in Figure 1, the imaging method includes：
Step 101, when picture of finding a view belongs to target scene, identify in picture of finding a view whether include portrait；Target scene
Background be in dim light state.
Under target scene such as setting sun scene or southern exposure scene, background luminance is overall partially dark, when being shot to personage,
And background luminance is commonly greater than the brightness of portrait, brightness differs larger between portrait and background, if forcing down background luminance, claps
The background effect taken out is pretty good, but the portrait shot is dark, if lifting people's image brightness, background may overexposure.
In the present embodiment, when picture of finding a view, which belongs to background, is in the scene of dim light state, whether identification finds a view in picture
Include portrait.
As a kind of possible implementation, it is mobile that the outline data of human body is stored in advance in mobile phone, tablet computer etc.
In terminal, wherein, human body contour outline data can be multiple including corresponding from the human body contour outline of the different angles such as front, side
Human body contour outline data.When camera shooting of the user using mobile terminal, after camera gets picture of finding a view, extraction takes
The profile of object in scape picture, then compared with the human body contour outline prestored.If the profile of extraction prestores with multiple
During at least one consistent in human body contour outline, it may be determined that portrait is included in picture of finding a view.
As alternatively possible implementation, can be deposited by the way of Face datection when in the picture that detects to find a view
In face, portrait is included in the picture that determines to find a view., can be in advance by facial contour data and nose, eye as an example
The data of the characteristic points such as eyeball, face, ear, prestore in the terminal, wherein, facial contour data include positive face, side
The outline datas such as face, may also include the outline data of different shapes of face.In picture of finding a view, extraction contour of object with the people to prestore
Face profile is compared, if the profile of extraction is at least one consistent with the facial contour to prestore, then from picture of finding a view,
Facial contour surrounds in region extraction key feature points, with the data of the characteristic point such as the nose, eyes, face that prestore into
Row compares, and whether there is face in picture of finding a view to further determine that.Optionally, it can also utilize and be based on opencv Face datections
Principle carry out Face datection, whether to include portrait in the picture that determines to find a view.
It should be noted that the shooting in the present embodiment can be the mobile terminal shooting photo with camera function,
It can be shooting video etc..
Step 102, if including portrait in picture of finding a view, the sensitivity ISO of camera is turned down.
Wherein, sensitivity ISO is used to weigh sensitivity of the egative film for light, in digital camera, for weighing sense
Sensitivity of the optical device to light.In the case where the other conditions such as aperture, shutter speed are identical, sensitivity ISO is higher, claps
The picture taken out is brighter.
In the present embodiment, when determine to belong to include portrait in the picture of finding a view of target scene when, turn down the sense of camera
Luminosity ISO forces down background luminance, makes background dimmed.The value of sensitivity ISO has 100,200,400,800 etc. at present, sensitivity
The value of ISO is bigger, and in the case where the other conditions such as aperture, shutter speed are identical, image is brighter.In specific implementation,
The value of the sensitivity ISO of camera can be turned down one or more grade, to force down background luminance.
Such as：4 ISO grades can be set, and value is respectively 100,200,400,800.When the ISO measured should be 800
When, ISO can be arranged to 400.
It should be noted that ISO grades and corresponding obtaining value method are only as an example, cannot be used for this reality in the present embodiment
Apply example to be limited, those skilled in the art could be aware that, is not limited to use mode provided in this embodiment, can also use it
His ISO grades and corresponding value mode.
Step 103, open flash lamp and light filling is carried out to portrait.
Since the brightness of portrait is less than the brightness of background, when including portrait in the picture of finding a view of target scene, turning down
After sensitivity ISO, background luminance is further forced down, but at the same time portrait can not blur-free imaging, therefore, flash lamp pair can be opened
Portrait carries out light filling.In general, the light filling scope of flash lamp is smaller, open flash lamp to portrait carry out light filling to background into
It is smaller as influencing.
Specifically, the camera module in camera is controlled to stop the operation such as automatic light measuring, parameter regulation, wherein, image mould
Automatic light measuring and the parameter regulation operation of group include the flash spotter calculation that auto-focusing point or current portrait etc. survey luminous point, with to light
The numerical value such as circle, shutter speed, sensitivity ISO are adjusted.After camera module stops the operation such as automatic light measuring, parameter regulation, move
Dynamic terminal sends open command to flash lamp.After flash lamp receives open command, flash lamp is opened, to be mended to portrait
Light, improves people's image brightness.
Step 104, in the state of flash lamp unlatching, picture of finding a view is shot using camera.
In the state of flash lamp unlatching, after user clicks on shooting push button, mobile terminal receives shooting instruction, mobile whole
End shoots picture of finding a view according to shooting instruction using camera.Alternatively, after flash lamp opens preset duration, after 0.1s,
In the state of flash lamp is opened, mobile terminal shoots picture of finding a view using camera.It is thus possible to realize that both to have forced down background bright
Degree improves the shooting effect of people's image brightness again.
For an embodiment in clear explanation, in the present embodiment using target scene be specially setting sun scene, southern exposure scene as
Example, illustrates.In setting sun scene that the present embodiment refers to, southern exposure scene, for confirming whether photographed scene is setting sun scene
Or southern exposure scene is most important.Below by another embodiment, the imaging method that the application proposes is explained.Fig. 2 is this Shen
Please embodiment provide another imaging method flow diagram.
As shown in Fig. 2, the imaging method includes：
Step 201, the average brightness for the background in picture of finding a view.
When user with the mobile terminal of camera using being shot, mobile terminal can show that preview is found a view picture
Face.After picture is found a view in acquisition, the background for picture of finding a view can be divided into multiple regions, obtain the brightness in each region, and then
Calculate the average brightness of background in picture of finding a view.
Step 202, if the average brightness of background is less than first threshold brightness, identify whether the background in picture of finding a view includes
Brightness is higher than the source region of second threshold brightness.
In the setting sun or southern exposure scene, background usually contains the sun and sky, can also occur cloud on high sometimes, lead
Cause background it is overall it is partially dark in the case of, also there are non-uniform situation for the brightness in each several part region.In the embodiment of the present application, it will carry on the back
The average brightness of scape is compared with default first threshold brightness, when background luminance is less than first threshold brightness, illustrates the back of the body
Scape is more dim, and then identifies whether the background in picture of finding a view is higher than the source region of second threshold brightness comprising brightness.Its
In, second threshold brightness is more than first threshold brightness, and source region can be understood as the of a relatively high region of brightness in background, leads to
Above procedure is crossed, judges that the brightness in each several part region in background whether there is non-uniform situation.
Specifically, position of the source region in picture of finding a view, size etc. are preset, if such as setting source region
For rectangle, then size can be rectangular length and width, and for the light source and for example set as circle, size can be circular half
Footpath.The position set in picture of finding a view, the scope for the source region that can be limited according to the size of setting, in the restriction
In the range of picture of finding a view in, obtain the pixel value of each pixel, one or more judged whether according to pixel value
Continuous regional extent.If in the presence of it is source region that can determine continuous regional extent.
Then, find a view the brightness of source region in picture, and compared with second threshold brightness.If source region
Brightness be higher than second threshold brightness, then the source region is probably the influence due to sunrise or sunset.
Step 203, if identifying, the background in picture of finding a view includes source region, obtains shooting time.
Due under the backlight scene and night starry sky scene on daytime, it is overall partially dark there is also background in some cases and
The brightness in background each several part region also there are uneven, in order to exclude daytime backlight scene and night starry sky scene this two
Kind need not force down background luminance, the scene of people's image brightness be heightened, when the background in picture of finding a view is higher than second threshold comprising brightness
During the source region of brightness, the current shooting time of acquisition for mobile terminal, to exclude the backlight scene on daytime by shooting time
And night starry sky scene.
Step 204, if shooting time belongs to sunrise period or sunset period, the picture that determines to find a view belongs to setting sun scene or court
Positive scene.
As a kind of possible implementation, due to areal different season, sunset period or sunrise period are not
Together, same season, belongs to the area of different time zone, and sunrise period or sunset period also differ.Therefore, the application is real
Apply in example, user can be according to residing area and season, manual setting sunrise period or sunset period.For example, Beijing is in east
8th area, and Urumqi City is located at eastern 6th area, the time difference is two hours, and the sunrise period can be set by living in Pekinese user
For 4 points 40 50 minutes to 5:, the sunrise period can be may be configured as at 6 points 50 50 minutes to 7: by the user in Urumchi.Obtaining
After shooting time, mobile terminal compared with the sunrise period and sunset period of user setting, claps shooting time with definite
Take the photograph whether the time belongs to sunset period or sunrise period.
As alternatively possible implementation, the current shooting time can be determined by way of being interacted with server
Whether sunrise period or sunset period are belonged to.Specifically, mobile terminal sends inquiry request to server, in the inquiry request
Carry shooting time and spot for photography.After server receives request, sunrise and the sunset period on the spot for photography same day are inquired about,
By the shooting time transmitted by mobile terminal compared with sunrise period and sunset period.If shooting time belongs to sunrise or day
Fall the period, server belongs to the query result of sunrise period or sunset period to mobile terminal transmission shooting time；If during shooting
Between be not belonging to sunrise or sunset period, server sends shooting time to mobile terminal and is not belonging to sunrise period or sunset period
Query result.After mobile terminal receives the query result of return, if result to belong to sunrise period or sunset period, can be with
The picture that determines to find a view belongs to southern exposure scene or setting sun scene.
In the present embodiment, by judging whether shooting time belongs to sunrise period or sunset period, night can be excluded
Street lamp scene, backlight scene on daytime, night starry sky scene etc., so that the judgement improved to setting sun scene or southern exposure scene is accurate
Exactness.
Step 205, when picture of finding a view belongs to setting sun scene or southern exposure scene, identify in picture of finding a view whether include people
Picture.
The specific method that portrait whether is included in picture of finding a view is identified, reference can be made to the phase described in above-described embodiment is inside the Pass
Hold, details are not described herein.
Step 206, if including portrait in picture of finding a view, the sensitivity ISO of camera is turned down.
In the present embodiment, when including portrait in the picture of finding a view for determining to belong to setting sun scene or southern exposure scene, adjust
The sensitivity ISO of low camera forces down background luminance, makes background dimmed.
Step 207, open flash lamp and light filling is carried out to portrait.
Since the brightness of portrait is less than the brightness of background, when including people in the picture of finding a view of setting sun scene or southern exposure scene
During picture, after sensitivity ISO is turned down, background luminance is further forced down, but at the same time portrait can not blur-free imaging, therefore, can be with
Open flash lamp and light filling is carried out to portrait.In general, the light filling scope of flash lamp is smaller, opens flash lamp and portrait is mended
Light is smaller to the Imaging of background.
Specifically, the camera module in camera is controlled to stop the operation such as automatic light measuring, parameter regulation.Camera module stops
After the operation such as automatic light measuring, parameter regulation, mobile terminal sends open command to flash lamp.Flash lamp receives open command
Afterwards, flash lamp is opened, and to carry out light filling to portrait, improves people's image brightness.
Step 208, in the state of flash lamp unlatching, picture of finding a view is shot using camera.
In the state of flash lamp unlatching, after user clicks on shooting push button, mobile terminal receives shooting instruction, mobile whole
End shoots picture of finding a view according to shooting instruction using camera.Alternatively, after flash lamp opens preset duration, after 0.1s,
In the state of flash lamp is opened, mobile terminal shoots picture of finding a view using camera.It is thus possible to realize that both to have forced down background bright
Degree improves the shooting effect of people's image brightness again.
For example, when being shot to the people under setting sun scene, can by turning down sensitivity ISO and opening flash lamp
People's image brightness is improved to reach, and forces down the effect of setting sun background luminance at the same time.
The imaging method of the embodiment of the present application, by the background for the picture that judges to find a view whether comprising meeting the light source of condition
Region, and the period belonging to shooting time, to determine to find a view, whether picture is setting sun scene or southern exposure scene, so as to be
Follow-up operation provides the foundation.
In order to further improve the accuracy of judgement degree to setting sun scene or southern exposure scene, can by Weather information exclude by
Cause sunset or the sightless situation of sunrise in bad weather.
Specifically, after step 202, mobile terminal can obtain the Weather information in current shooting place from server, into
One step judges whether the Weather information of spot for photography is sunny or partly cloudy weather.If the Weather information in current shooting place is not
Sunny or partly cloudy weather, then can determine that sunrise or sunset are invisible, may thereby determine that picture of finding a view is not belonging to court
Positive scene or setting sun scene.If the Weather information in current shooting place is fine day or partly cloudy weather, and the current shooting time
Belong to sunrise period or sunset period, the picture that can more confirm to find a view belongs to southern exposure scene or setting sun scene.
Further, since in sunrise and at sunset, sunray is influenced be subject to atmospheric refraction, cause to send can
See that light is partially warm.Human eye can often see the red sun to Chinese red in sunrise and at sunset, so that the present embodiment can be with
According to the colour temperature of source region in background, verify whether picture of finding a view belongs to setting sun scene or southern exposure scene.
Specifically, after source region is included during step 202 determines to find a view picture, the average color of source region is obtained
Temperature, then by average color temperature compared with threshold value colour temperature.If the average color temperature of source region is less than threshold value colour temperature, and shoots
Time belongs to sunrise period or sunset period, and the picture that can more determine to find a view belongs to southern exposure scene or setting sun scene.
It is understood that judge find a view picture whether belong to setting sun scene or southern exposure scene when, can be in spot for photography
Weather information, the average color temperature of source region, period belonging to shooting time etc., while when meeting condition, determine to find a view
Picture belongs to setting sun scene or southern exposure scene.
When including portrait in picture of finding a view, if the personage of shooting away from the distant of camera, is glistened even if opening
Lamp does not reach the effect of light filling yet, when the embodiment of the present application proposes that the distance between personage and camera meets condition, opens
Camera carries out light filling.With reference to Fig. 3, it is described in detail by another embodiment.
As shown in figure 3, the imaging method includes：
Step 301, when picture of finding a view belongs to target scene, identify in picture of finding a view whether include portrait；Target scene
Background be in dim light state.
In the present embodiment, when picture of finding a view, which belongs to background, is in the scene of dim light state, whether identification finds a view in picture
Include portrait.Specific recognition methods can be found in the related content described in previous embodiment, and details are not described herein.
Step 302, if including portrait in picture of finding a view, the sensitivity ISO of camera is turned down.
In the present embodiment, when determine to belong to include portrait in the picture of finding a view of target scene when, turn down the sense of camera
Luminosity ISO forces down background luminance, makes background dimmed.In specific implementation, the value of the sensitivity ISO of camera can be turned down one
Grade or multiple grades.
Step 303, when portrait occupied area ratio is more than threshold percentage in picture of finding a view, identification portrait corresponds to personage
The distance between camera.
It is understood that when being shot, when personage is apart from camera certain distance, opening camera could reach
To the purpose that light filling is carried out to portrait.
In general, personage and the distance between camera are smaller, portrait occupied area ratio is bigger in picture of finding a view.By
This, can first judge whether the portrait occupied area ratio in picture of finding a view is more than threshold percentage, as threshold percentage isWork as people
As when occupied area ratio is more than threshold percentage in picture of finding a view, identification portrait corresponds to the distance between personage and camera.
As a kind of possible implementation, can by principle of triangulation, calculate personage and plane where camera it
Between distance.Based in Fig. 4, in real space, imaging personage, and two camera position O are depictedlAnd Or, with
And the focal plane of two cameras, the distance of plane is f where two cameras of focal plane distance.
P and p ' is position of the same personage in different shooting images respectively.Wherein, p points are apart from place shooting image
The distance of left border is xl, the distance of p ' left borders apart from place shooting image is xr。OlAnd OrRespectively two are taken the photograph
As head, for the two cameras in same plane, the distance between two cameras are Z.
Based on principle of triangulation, the personage in Fig. 4 and the distance between planes b where two cameras, have as follows
Relation：
Based on this, can push awayWherein, d for position of the same personage in different shooting images it
Between range difference.Since Z, f are definite value, the distance between plane b according to where d can determine personage and camera.
As alternatively possible implementation, infrared ambulator is set on the side of camera, when camera is shot,
Infrared ambulator launches infrared ray to personage, and receives the infrared ray that personage reflects, according to the spread speed of light and from
Launch infrared ray to the time received used in the infrared ray of reflection, the distance between personage and camera can be calculated.
Step 304, determine that the distance between personage and camera are not more than the maximum effective distance of flash lamp, open flash of light
Lamp carries out light filling to portrait.
After the distance between personage and camera is identified, by the distance between personage and camera with flash lamp most
Big effective distance is compared.When the distance between personage and camera are not more than the maximum effective distance of flash lamp, flash of light
Lamp can reach portrait light filling effect, therefore send open command to flash lamp.Flash lamp opens flash of light according to open command
Lamp is with to portrait progress light filling.
Step 305, in the state of flash lamp unlatching, picture of finding a view is shot using camera.
In the state of flash lamp unlatching, after user clicks on shooting push button, mobile terminal receives shooting instruction, mobile whole
End shoots picture of finding a view according to shooting instruction using camera.Alternatively, after flash lamp opens preset duration, after 0.1s,
In the state of flash lamp is opened, picture of finding a view is shot using camera.Background luminance is not only forced down it is thus possible to realize but also has been lifted
The shooting effect of people's image brightness.
Step 306, if the distance between personage and camera are more than the maximum effective distance of flash lamp, existed using camera
In the state of flash lamp is not opened, picture of finding a view is shot, obtains target image.
When the distance between personage and camera are more than the maximum effective distance of flash lamp, flash lamp does not reach portrait
Light filling effect, therefore using camera in the state of flash lamp is not opened, shoot picture of finding a view, obtain target image.
Step 307, the portrait area in recognition target image.
In order to improve shooting effect, the brightness of adjustable height portrait area.Specifically, multiple things in target image be can extract
The profile of body, then by the profile of extraction compared with the human body contour outline to prestore, so as to identify the portrait in target image
Region.
Step 308, brightness is heightened to the portrait area in target image.
After the portrait area in identifying target image, the brightness of the portrait area in target image is heightened, to improve
Portrait display effect in the target image.
Due to heightening brightness to portrait area, the brightness of portrait area and peripheral region may be made to seem loftier,
Using existing edge-smoothing algorithm, such as mean filter, gaussian filtering, the edge of portrait area is smoothed,
So that the luminance transition of portrait area and peripheral region is smooth, and then improve the display effect of shooting image.
Step 309, to removing portrait area in target image with outer portion, brightness is turned down.
In order to improve the overall display effect of target image, further, can in target image in addition to portrait area
Part, brightness is turned down, to reduce portrait area and luminance difference except portrait area between outer portion, so as to improve target
The overall display effect of image.
The imaging method of the embodiment of the present application, by by the distance between the corresponding personage of portrait and camera and flash lamp
Maximum effective distance be compared, different processing modes is taken according to comparative result, processing mode is more flexible.
In addition, in shooting, if merely desiring to photographed, and imprudence photographs unrelated personage, at this moment can click on
Screen is focused, and using camera in the state of flash lamp is not turned on, shoots picture of finding a view.
The imaging method of the embodiment of the present application, by the way that when picture of finding a view belongs to target scene, identifying in picture of finding a view is
It is no to include portrait, wherein, the background of target scene is in dim light state, if including portrait in picture of finding a view, turns down camera
Sensitivity ISO, and open flash lamp and light filling is carried out to portrait, in the state of flash lamp unlatching, found a view using camera shooting
Picture.In the present embodiment, when being shot under background is in the target scene of dim light state to personage, by turning down camera
Sensitivity ISO force down background luminance, by open flash lamp to portrait carry out light filling, it is achieved thereby that it is bright to force down background at the same time
The effect of degree and lifting people's image brightness, improves shooting effect, and solving cannot realize that to force down background bright at the same time in the prior art
The technical problem of the effect of degree and lifting people's image brightness.
The application also proposes a kind of imaging device.Fig. 5 is that the structure of a kind of imaging device provided by the embodiments of the present application is shown
It is intended to.
As shown in figure 5, the imaging device includes：Identification module 510, adjustment module 520, supplementary lighting module 530, control module
540。
Wherein, identification module 510, for when picture of finding a view belongs to target scene, identifying whether included in picture of finding a view
Portrait, the background of target scene are in dim light state.
Module 520 is adjusted, if for including portrait in picture of finding a view, turns down the sensitivity ISO of camera.
Supplementary lighting module 530, light filling is carried out for opening flash lamp to portrait.
Control module 540, in the state of being opened in flash lamp, picture of finding a view is shot using camera.
Specifically, imaging device provided by the embodiments of the present application, can perform imaging method provided by the embodiments of the present application,
The device can be configured in the terminal.Wherein, the type of mobile equipment is very much, can be mobile phone, tablet computer, notes
This computer etc..Fig. 5 carries out example by mobile phone of mobile terminal.
In the application one embodiment, target scene includes setting sun scene and/or southern exposure scene, on the basis of Fig. 5,
As shown in fig. 6, the imaging device can also include：First acquisition module 550, source region identification module 560, second obtain mould
Block 570, determining module 580.
First acquisition module 550, the average brightness for background in picture of finding a view.
Source region identification module 560, if the average brightness for background is less than first threshold brightness, identifies picture of finding a view
In background whether comprising brightness be higher than second threshold brightness source region；Second threshold brightness is more than first threshold brightness.
Second acquisition module 570, if for identifying that the background in picture of finding a view includes source region, when obtaining shooting
Between.
Determining module 580, if belonging to sunrise period or sunset period for shooting time, the picture that determines to find a view belongs to the setting sun
Scene or southern exposure scene.
In the application one embodiment, the second acquisition module 570, be additionally operable to obtain spot for photography Weather information；
Determining module 580, the Weather information for being additionally operable to determine spot for photography are sunny or partly cloudy weather.
In the application one embodiment, the second acquisition module 570, is additionally operable to identification and finds a view the flat of source region in picture
Equal colour temperature；
Determining module 580, is additionally operable to determine that average color temperature is less than threshold value colour temperature.
Further, in the application one embodiment, which further includes：
3rd acquisition module, for when being more than threshold percentage in the ratio of portrait occupied area described in picture of finding a view, knowing
Others is as corresponding the distance between personage and camera；
Determining module 580, be additionally operable to determine the distance between personage and camera no more than flash lamp maximum effectively away from
From.
In the application one embodiment, which can also include：
Control module 540, if being additionally operable to the maximum effective distance that the distance between personage and camera are more than flash lamp, is adopted
With camera, in the state of flash lamp is not opened, picture of finding a view is shot, obtains target image.
Portrait area identification module, for the portrait area in recognition target image.
Brightness adjusting section, for heightening brightness to the portrait area in target image.
In the application one embodiment, brightness adjusting section, is additionally operable to removing portrait area in target image with outside
Point, turn down brightness.
The division of modules is only used for for example, in other embodiments, can fill imaging in above-mentioned imaging device
Put and be divided into different modules as required, to complete all or part of function of above-mentioned imaging device.
It should be noted that the foregoing explanation to imaging method embodiment, the imaging for being also applied for the embodiment fills
Put, therefore details are not described herein.
The imaging device of the embodiment of the present application, by the way that when picture of finding a view belongs to target scene, identifying in picture of finding a view is
It is no to include portrait, wherein, the background of target scene is in dim light state, if including portrait in picture of finding a view, turns down camera
Sensitivity ISO, and open flash lamp and light filling is carried out to portrait, in the state of flash lamp unlatching, found a view using camera shooting
Picture.In the present embodiment, when being shot under background is in the target scene of dim light state to personage, by turning down camera
Sensitivity ISO force down background luminance, by open flash lamp to portrait carry out light filling, it is achieved thereby that it is bright to force down background at the same time
The effect of degree and lifting people's image brightness, improves shooting effect, and solving cannot realize that to force down background bright at the same time in the prior art
The technical problem of the effect of degree and lifting people's image brightness.
The application also proposes a kind of mobile terminal.Fig. 7 shows for a kind of structure of mobile terminal provided by the embodiments of the present application
It is intended to.
As shown in fig. 7, the mobile terminal includes：Camera 710, flash lamp 720, memory 730, processor 740 and
It is stored in the computer program that can be run on memory 730 and on processor 740.
Wherein, during 740 executive program of processor, the imaging method as described in foregoing any embodiment is realized.
The application also proposes a kind of computer-readable recording medium, is stored thereon with computer program, which is processed
The imaging method as described in foregoing any embodiment is realized when device performs.
Image processing circuit is further included in above-mentioned mobile terminal, image processing circuit can utilize hardware and/or software group
Part is realized, it may include defines the various processing units of ISP (Image Signal Processing, picture signal processing) pipeline.
Fig. 8 is the schematic diagram of image processing circuit in one embodiment.As shown in figure 8, for purposes of illustration only, only show to implement with the application
The various aspects of the relevant image processing techniques of example.
As shown in figure 8, image processing circuit includes ISP processors 940 and control logic device 950.Imaging device 910 is caught
View data handled first by ISP processors 940, ISP processors 940 view data is analyzed with catch can be used for it is true
The image statistics of fixed and/or imaging device 910 one or more control parameters.Imaging device 910 can specifically include
Two cameras, each camera may include there is one or more lens 912 and imaging sensor 914.Imaging sensor
914 may include colour filter array (such as Bayer filters), imaging sensor 914 can obtain with imaging sensor 914 it is each into
As luminous intensity and wavelength information that pixel is caught, and provide the one group of raw image data that can be handled by ISP processors 940.Pass
Raw image data can be supplied to ISP processors 940 by sensor 920 based on 920 interface type of sensor.920 interface of sensor
SMIA (Standard Mobile Imaging Architecture, Standard Mobile Imager framework) interface, other can be utilized
The combination of serial or parallel camera interface or above-mentioned interface.
ISP processors 940 handle raw image data pixel by pixel in various formats.For example, each image pixel can
Bit depth with 8,10,12 or 14 bits, ISP processors 940 can carry out raw image data at one or more images
Reason operation, statistical information of the collection on view data.Wherein, image processing operations can be by identical or different bit depth precision
Carry out.
ISP processors 940 can also receive pixel data from video memory 930.For example, from 920 interface of sensor by original
Beginning pixel data is sent to video memory 930, and the raw pixel data in video memory 930 is available to ISP processors
940 is for processing.Video memory 930 can be independent in a part, storage device or electronic equipment for storage arrangement
Private memory, and may include DMA (Direct Memory Access, direct direct memory access (DMA)) feature.
When receiving the raw image data from 920 interface of sensor or from video memory 930, ISP processing
Device 940 can carry out one or more image processing operations, such as time-domain filtering.View data after processing can be transmitted to be stored to image
Device 930, to carry out other processing before shown.ISP processors 940 receive processing data from video memory 930,
And the processing data are carried out with the image real time transfer in original domain and in RGB and YCbCr color spaces.Figure after processing
As data may be output to display 970, so that user watches and/or by graphics engine or GPU (Graphics Processing
Unit, graphics processor) further processing.In addition, the output of ISP processors 940 also can be transmitted to video memory 930, and
Display 970 can read view data from video memory 930.In one embodiment, video memory 930 can be configured as
Realize one or more frame buffers.In addition, the output of ISP processors 940 can be transmitted to encoder/decoder 960, to compile
Code/decoding view data.The view data of coding can be saved, and be decompressed before being shown in 970 equipment of display.Compile
Code device/decoder 960 can be realized by CPU or GPU or coprocessor.
The definite statistics of ISP processors 940, which can be transmitted, gives control logic device Unit 950.For example, statistics can wrap
Include the image sensings such as automatic exposure, automatic white balance, automatic focusing, flicker detection, black level compensation, 912 shadow correction of lens
914 statistical information of device.Control logic device 950 may include the processor and/or micro-control for performing one or more routines (such as firmware)
Device processed, one or more routines according to the statistics of reception, can determine imaging device 910 control parameter and control ginseng
Number.For example, control parameter may include that 920 control parameter of sensor (such as gain, time of integration of spectrum assignment), camera are dodged
The combination of photocontrol parameter, 912 control parameter of lens (such as focusing or zoom focal length) or these parameters.ISP control parameters
It may include the gain level and color correction matrix for being used for automatic white balance and color adjustment (for example, during RGB processing), with
And 912 shadow correction parameter of lens.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
Combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this area
Art personnel can be tied the different embodiments or example described in this specification and different embodiments or exemplary feature
Close and combine.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present application, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of the executable instruction of one or more the step of being used for realization custom logic function or process
Point, and the scope of the preferred embodiment of the application includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by it is basic at the same time in the way of or in the opposite order, carry out perform function, this should be by the application
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Connecting portion (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or if necessary with it
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the application can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware with another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized：With the logic gates for realizing logic function to data-signal from
Logic circuit is dissipated, the application-specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries
Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the application can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..Although have been shown and retouch above
Embodiments herein is stated, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as the limit to the application
System, those of ordinary skill in the art can be changed above-described embodiment, change, replace and become within the scope of application
Type.
Claims (10)
1. a kind of imaging method, it is characterised in that method comprises the following steps：
When picture of finding a view belongs to target scene, whether portrait is included in picture of finding a view described in identification；The back of the body of the target scene
Scape is in dim light state；
If including portrait in the picture of finding a view, the sensitivity ISO of camera is turned down；
Open flash lamp and light filling is carried out to portrait；
In the state of flash lamp unlatching, using picture of finding a view described in camera shooting.
2. imaging method according to claim 1, it is characterised in that the target scene includes setting sun scene and/or court
Positive scene, it is described whether to identify in picture of finding a view comprising before portrait, further include：
The average brightness for the background in picture of finding a view described in acquisition；
If the average brightness of the background is less than first threshold brightness, whether the background in picture of finding a view described in identification includes brightness
Higher than the source region of second threshold brightness；The second threshold brightness is more than the first threshold brightness；
If identifying, the background in the picture of finding a view includes source region, obtains shooting time；
If the shooting time belongs to sunrise period or sunset period, determine that the picture of finding a view belongs to setting sun scene or southern exposure field
Scape.
3. imaging method according to claim 2, it is characterised in that described to determine that the picture of finding a view belongs to setting sun scene
Or before southern exposure scene, further include：
Obtain the Weather information of spot for photography；
The Weather information for determining the spot for photography is sunny or partly cloudy weather.
4. imaging method according to claim 2, it is characterised in that described to determine that the picture of finding a view belongs to setting sun scene
Or before southern exposure scene, further include：
Find a view described in identification the average color temperature of source region described in picture；
Determine that the average color temperature is less than threshold value colour temperature.
5. according to claim 1-4 any one of them imaging methods, it is characterised in that in the picture of finding a view comprising portrait it
Afterwards, further include：
When being more than threshold percentage in the ratio of portrait occupied area described in picture of finding a view, identify that the portrait corresponds to personage
The distance between described camera；
Determine that the distance between the personage and the camera are not more than the maximum effective distance of the flash lamp.
6. imaging method according to claim 5, it is characterised in that the identification portrait corresponds to personage and taken the photograph with described
After the distance between head, further include：
If the distance between the personage and the camera are more than the maximum effective distance of the flash lamp, using the shooting
Head, in the state of flash lamp is not opened, picture of finding a view described in shooting, obtains target image；
Identify the portrait area in the target image；
Brightness is heightened to the portrait area in the target image.
7. imaging method according to claim 6, it is characterised in that the portrait area tune in the target image
After high brightness, further include：
To removing the portrait area in the target image with outer portion, brightness is turned down.
8. a kind of imaging device, it is characterised in that described device includes：
Identification module, for whether including portrait in picture of when picture of finding a view belongs to target scene, finding a view described in identification；It is described
The background of target scene is in dim light state；
Module is adjusted, if for including portrait in the picture of finding a view, turns down the sensitivity ISO of camera；
Supplementary lighting module, light filling is carried out for opening flash lamp to portrait；
Control module, in the state of being opened in the flash lamp, using picture of finding a view described in camera shooting.
A kind of 9. mobile terminal, it is characterised in that including：Camera, flash lamp, memory, processor and it is stored in memory
Computer program that is upper and can running on a processor, when the processor performs described program, is realized as in claim 1-7
Any one of them imaging method.
10. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the program is by processor
The imaging method as any one of claim 1-7 is realized during execution.
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| CN110611774B (en) * | 2019-09-20 | 2021-07-16 | 深圳市梦网视讯有限公司 | Illumination compensation method and system for road surface monitoring video |
| CN110944163A (en) * | 2019-11-21 | 2020-03-31 | 维沃移动通信有限公司 | Image processing method and electronic equipment |
| CN111385454A (en) * | 2020-03-20 | 2020-07-07 | 深圳传音控股股份有限公司 | Photographing method, mobile terminal and computer-readable storage medium |
| CN112687108A (en) * | 2020-06-28 | 2021-04-20 | 浙江大华技术股份有限公司 | Detection method and detection device for man-vehicle matching, shooting device and storage medium |
| CN112687108B (en) * | 2020-06-28 | 2022-08-09 | 浙江大华技术股份有限公司 | Detection method and detection device for man-vehicle matching, shooting device and storage medium |
| CN112383685A (en) * | 2020-11-02 | 2021-02-19 | 北京如影智能科技有限公司 | Containing device, control method and control device |
| CN114885096A (en) * | 2022-03-29 | 2022-08-09 | 北京旷视科技有限公司 | Shooting mode switching method, electronic equipment and storage medium |
| CN114885096B (en) * | 2022-03-29 | 2024-03-15 | 北京旷视科技有限公司 | Shooting mode switching method, electronic equipment and storage medium |
| CN116977332A (en) * | 2023-09-21 | 2023-10-31 | 合肥联宝信息技术有限公司 | Camera light filling lamp performance test method and device, electronic equipment and storage medium |
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