CN107370961A - image exposure processing method, device and terminal device - Google Patents

image exposure processing method, device and terminal device Download PDF

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Publication number
CN107370961A
CN107370961A CN201710458337.0A CN201710458337A CN107370961A CN 107370961 A CN107370961 A CN 107370961A CN 201710458337 A CN201710458337 A CN 201710458337A CN 107370961 A CN107370961 A CN 107370961A
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China
Prior art keywords
image
human face
tooth regions
face region
region
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Granted
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CN201710458337.0A
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Chinese (zh)
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CN107370961B (en
Inventor
曾元清
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN201710458337.0A priority Critical patent/CN107370961B/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/71Circuitry for evaluating the brightness variation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/73Circuitry for compensating brightness variation in the scene by influencing the exposure time
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene
    • H04N23/76Circuitry for compensating brightness variation in the scene by influencing the image signals

Abstract

The present invention proposes a kind of image exposure processing method, device and terminal device, wherein, method includes:Detect the human face region in current scene;Determine the tooth regions in human face region;Light-metering is carried out for tooth regions, to obtain the exposure value of image;According to exposure value shooting image, and output image.Pass through this method, it can realize and carry out light-metering according to tooth regions when taking pictures, improve the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, effect of taking pictures is lifted, terminal device in the prior art is solved and exposure value is calculated according to human face region, the human face region of captured image may be dark, cause other brighter regions, such as tooth regions under-exposure, take pictures the problem of ineffective.

Description

Image exposure processing method, device and terminal device
Technical field
The present invention relates to image processing field, more particularly to a kind of image exposure processing method, device and terminal device.
Background technology
With the continuous development of intelligent terminal, during using terminal equipment is taken pictures, terminal is set user It is standby to use face exposure mode, i.e., image is exposed by calculating the exposure value of human face region automatically.This side Under formula, the human face region of captured image may be dark, causes other brighter regions, such as tooth regions under-exposure, Take pictures ineffective.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.
Therefore, first purpose of the present invention is to propose a kind of image exposure processing method, to realize the root when taking pictures Light-metering is carried out according to tooth regions, improves the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, lifting Take pictures effect, solve terminal device in the prior art and exposure value, the human face region of captured image are calculated according to human face region May be dark, cause other brighter regions, such as tooth regions under-exposure, take pictures the problem of ineffective.
Second object of the present invention is to propose a kind of image exposure processing unit.
Third object of the present invention is to propose a kind of terminal device.
Fourth object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
The 5th purpose of the present invention is to propose a kind of computer program product.
For the above-mentioned purpose, first aspect present invention embodiment proposes a kind of image exposure processing method, including:
Detect the human face region in current scene;
Determine the tooth regions in the human face region;
Light-metering is carried out for the tooth regions, to obtain the exposure value of image;
According to the exposure value shooting image, and output image.
The image exposure processing method of the embodiment of the present invention, after detecting human face region in current scene, according to Human face region determines tooth regions, carries out light-metering for tooth regions, to obtain the exposure value of image, is shot according to exposure value Image, and output image, it is possible to increase the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, carry Rise effect of taking pictures.
For the above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of image exposure processing unit, including:
Detection module, for detecting the human face region in current scene;
Determining module, for determining the tooth regions in the human face region;
Light-metering module, for carrying out light-metering for the tooth regions, to obtain the exposure value of image;
Output module, for according to the exposure value shooting image, and output image.
The image exposure processing unit of the embodiment of the present invention, after detecting human face region in current scene, according to Human face region determines tooth regions, carries out light-metering for tooth regions, to obtain the exposure value of image, is shot according to exposure value Image, and output image, it is possible to increase the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, carry Rise effect of taking pictures.
For the above-mentioned purpose, third aspect present invention embodiment proposes a kind of terminal device, including:
Housing and processor, memory and display interface in the housing, wherein, the processor passes through reading The executable program code stored in the memory runs program corresponding with the executable program code, for holding Image exposure processing method of the row as described in first aspect embodiment.
The terminal device of the embodiment of the present invention, after detecting human face region in current scene, according to human face region Tooth regions are determined, light-metering is carried out for tooth regions, to obtain the exposure value of image, according to exposure value shooting image, and Output image, it is possible to increase the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, lift effect of taking pictures Fruit.
For the above-mentioned purpose, fourth aspect present invention embodiment proposes a kind of non-transitory computer-readable storage medium Matter, computer program is stored thereon with, is realized when computer program is executed by processor as described in first aspect embodiment Image exposure processing method.
To achieve these goals, fifth aspect present invention embodiment proposes a kind of computer program product, when described When instruction processing unit in computer program product performs, the image exposure described in the above-mentioned first aspect embodiment of the present invention is performed Processing method.
The additional aspect of the present invention and advantage 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 present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect 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 the schematic flow sheet for the image exposure processing method that one embodiment of the invention proposes;
Fig. 2 is the schematic flow sheet for the image exposure processing method that another embodiment of the present invention proposes;
Fig. 3 is the structural representation for the image exposure processing unit that one embodiment of the invention proposes;
Fig. 4 is the structural representation for the terminal device that one embodiment of the invention proposes.
Embodiment
Embodiments of the invention are 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 the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings image exposure processing method, device and the terminal device of the embodiment of the present invention are described.
Fig. 1 is the schematic flow sheet for the image exposure processing method that one embodiment of the invention proposes.This method can be applied In the intelligent terminal with camera function.Wherein, intelligent terminal can be smart mobile phone, tablet personal computer, notes This computer or video camera etc. have the electronic equipment of camera.
As shown in figure 1, the image exposure processing method may comprise steps of:
S11, detect the human face region in current scene.
When user is taken pictures, personage, scenery, animal etc. may be included in current scene, can before photo is shot To be first scanned to the viewing area of current scene, current scene is detected using facial recognition techniques, identifies people Region where face.
Wherein, face feature of the facial recognition techniques based on people, it is capable of detecting when in current scene whether include face, and Position, the size of each face, and the positional information of each major facial organ are further detected when detecting face.
It should be noted that when not including human face region in current scene, show this time shooting emphasis do not lie in by Photographer, reference object are probably figure viewed from behind of animal, plant, building, or people etc., at this point it is possible to which directly normal operation is clapped According to function;When human face region is detected in current scene, the image exposure processing method of the embodiment of the present invention can be used.
S12, determine the tooth regions in human face region.
, can be further according in face recognition technology locating human face when including human face region in detecting current scene Mouth region.It is for instance possible to use face recognition algorithms determine the position where each major facial organ in human face region Confidence ceases, and obtains the position where lip etc., and then navigate to mouth region.
In general, the color of tooth is close to white, and brightness is higher in mouth region, thus, in the present embodiment, Can be higher by brightness, and characteristic information of the color close to white as tooth.So as in the present embodiment, navigate to face After mouth region in region, color can be further extracted from mouth region as white, and brightness highest feature Information, and according to color to be white, and the characteristic information positioning teeth region that brightness is higher.
Because in mouth region, only color dentulous is white, and tooth is most bright, therefore, from mouth region Color is extracted as white, after brightness highest region, you can it is tooth regions to conclude the region.
S13, light-metering is carried out for tooth regions, to obtain the exposure value of image.
Alternatively, light-metering can be carried out to tooth regions using prior art first, obtains photometry result, then, will survey Light result is bright less than the target of tooth regions in photometry result compared with the target brightness value of the tooth regions pre-saved During angle value, the exposure value to image compensation can be increased;When photometry result is higher than the target brightness value of tooth regions, can subtract The small exposure value to image compensation.
In this step, by the photometry result according to tooth regions, the adaptive exposure value for adjusting image, this can be lifted The flexibility of method, improve the accuracy of terminal device exposure compensating.
S14, according to exposure value shooting image, and output image.
In this step, by according to the exposure value shooting image after adjustment, and output image, it can effectively lift effect of taking pictures Fruit.
The image exposure processing method of the present embodiment, after detecting human face region in current scene, according to face Tooth regions are determined in region, light-metering are carried out for tooth regions, to obtain the exposure value of image, according to exposure value shooting figure Picture, and output image, it is possible to increase the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, lifting Take pictures effect.
In order to clearly illustrate above-described embodiment, another image exposure processing method, Fig. 2 are present embodiments provided The schematic flow sheet of another image exposure processing method provided by the embodiment of the present invention.
Referring to Fig. 2, the image exposure processing method comprises the following steps:
S201, current scene is detected using facial recognition techniques.
When user is taken pictures, personage, scenery, animal etc. may be included in current scene, can before photo is shot To be first scanned to the viewing area of current scene, current scene is detected using facial recognition techniques, to judge to work as Whether human face region is included in preceding scene.
Wherein, face feature of the facial recognition techniques based on people, it is capable of detecting when in current scene whether include face, and Position, the size of each face, and the positional information of each major facial organ are further detected when detecting face.
S202, judge whether include human face region in current scene, if so, performing S203, otherwise, perform S210.
Alternatively, judge whether include human face region in current scene, when not including human face region in current scene, table The emphasis of bright this time shooting does not lie in the person of being taken, i.e. user is probably animal, planted in self-timer or group's bat, reference object Thing, building, or figure viewed from behind of people etc., at this point it is possible to do not make any processing, direct normal operation camera function;In current field When human face region is detected in scape, triggering following step.
S203, obtain the human face region in the current scene detected.
Current scene is being detected using facial recognition techniques, after identifying the position where face, obtaining detection Human face region in the current scene gone out.
S204, mouth region in human face region is determined based on face recognition algorithms.
, can be further according in face recognition technology locating human face when including human face region in detecting current scene Mouth region.It is for instance possible to use face recognition algorithms determine the position where each major facial organ in human face region Confidence ceases, such as determines the position where eyes, nose, lip etc., and then navigates to mouth region.
S205, obtain monochrome information and color characteristic in mouth region.
In general, the color of tooth, close to white, brightness is higher in mouth region, thus, can in the present embodiment So that brightness is higher, characteristic information of the color close to white as tooth.So as in the present embodiment, navigate to human face region In mouth region after, further can be extracted from mouth region color for white, brightness highest characteristic information, and According to color to be white, the higher characteristic information positioning teeth region of brightness.
S206, tooth regions are determined according to monochrome information and color characteristic.
Because in mouth region, only color dentulous is white, and tooth is most bright, therefore, from mouth region Color is extracted as white, after brightness highest region, you can it is tooth regions to conclude the region.
S207, light-metering is carried out to tooth regions and obtains photometry result.
Mobile terminal carries out light-metering to tooth regions, and prior art can be used to obtain the photometry result of tooth regions.
S208, the exposure value of image is determined according to the target brightness value of photometry result and tooth regions.
In an embodiment of the present invention, target brightness value can be preset by the program of dispatching from the factory of mobile terminal, or, mesh Mark brightness value can be configured by user, and this is not restricted.
The exposure value of image is determined according to the target brightness value of photometry result and tooth regions, for example, low in photometry result When the target brightness value of tooth regions, the exposure value to image compensation can be increased;In photometry result higher than tooth regions During target brightness value, the exposure value to image compensation can be reduced, it is possible to increase the accuracy of terminal device exposure compensating, so as to The exposure value of image is computed correctly, lifts effect of taking pictures.
S209, according to exposure value shooting image, and output image.
In this step, by according to the exposure value shooting image after adjustment, and output image, it can effectively lift effect of taking pictures Fruit.
S210, any processing is not made.
The image exposure processing method of the present embodiment, current scene is detected by using facial recognition techniques, When not including human face region in current scene, any processing, direct normal operation camera function are not made, it is possible to increase terminal continues Boat ability.During by including human face region in current scene, mouth region in human face region is determined based on face recognition algorithms, Mouth region can be accurately positioned.By obtaining monochrome information and color characteristic in mouth region, according to monochrome information and Color characteristic determines tooth regions, can lift the accuracy of tooth regions acquisition.By carrying out light-metering acquisition to tooth regions Photometry result, the exposure value of image is determined according to the target brightness value of photometry result and tooth regions, image can be computed correctly Exposure value, lifting takes pictures effect.By according to exposure value shooting image, and output image, it can effectively lift effect of taking pictures.
In order to realize above-described embodiment, the present invention also proposes a kind of image exposure processing unit.
Fig. 3 is the structural representation for the image exposure processing unit that one embodiment of the invention proposes.
As shown in figure 3, the image exposure processing unit includes:Detection module 310, determining module 320, light-metering module 330, And output module 340.Wherein,
Detection module 310, for detecting the human face region in current scene;
Determining module 320, for determining the tooth regions in human face region;
Light-metering module 330, for carrying out light-metering for tooth regions, to obtain the exposure value of image;
Output module 340, for according to exposure value shooting image, and output image.
Alternatively, in a kind of possible implementation of the embodiment of the present invention, detection module 310, it is used for:
Current scene is detected using facial recognition techniques;
Obtain the human face region in the current scene detected.
Alternatively, in a kind of possible implementation of the embodiment of the present invention, determining module 320, it is used for:
Mouth region in human face region is determined based on face recognition algorithms;
Tooth regions are obtained according to mouth region.
Alternatively, in a kind of possible implementation of the embodiment of the present invention, determining module 320, it is used for:
Obtain the monochrome information and color characteristic in mouth region;
Tooth regions are determined according to monochrome information and color characteristic.
Alternatively, in a kind of possible implementation of the embodiment of the present invention, light-metering module 330, it is used for:
Light-metering is carried out to tooth regions and obtains photometry result;
The exposure value of image is determined according to the target brightness value of photometry result and tooth regions.
It should be noted that the foregoing explanation to image exposure processing method embodiment is also applied for the present embodiment Image exposure processing unit, its realization principle is similar, and here is omitted.
The image exposure processing method of the present embodiment, after detecting human face region in current scene, according to face Tooth regions are determined in region, light-metering are carried out for tooth regions, to obtain the exposure value of image, according to exposure value shooting figure Picture, and output image, it is possible to increase the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, lifting Take pictures effect.
In order to realize above-described embodiment, the present invention also proposes a kind of terminal device.
Fig. 4 is the structural representation for the terminal device that one embodiment of the invention proposes.
As shown in figure 4, the terminal device 40 includes:Housing 401 and processor 402, memory in housing 401 403 and display interface 404, wherein, processor 402 is run by reading the executable program code stored in memory 403 Program corresponding with executable program code, for realizing image exposure processing method as in the foregoing embodiment.
The terminal device of the present embodiment, after detecting human face region in current scene, determined according to human face region Go out tooth regions, carry out light-metering for tooth regions, to obtain the exposure value of image, according to exposure value shooting image, and export Image, it is possible to increase the accuracy of terminal device exposure compensating, so as to be computed correctly the exposure value of image, lift effect of taking pictures.
In order to realize above-described embodiment, the present invention also proposes a kind of non-transitorycomputer readable storage medium, deposited thereon Computer program is contained, image exposure as in the foregoing embodiment can be realized when the computer program is executed by processor Processing method.
In order to realize above-described embodiment, the present invention also proposes a kind of computer program product, when the computer program produces When instruction in product is by computing device, the image exposure processing method described in the above embodiment of the present invention is performed.
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 present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification Close and combine.
In addition, term " first ", " second " are only used for describing 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 invention, " multiple " are meant that at least two, such as two, three It is individual 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 to realize custom logic function or process Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention 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 installation), 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, which can even is that, to print the paper of described program thereon or other are suitable Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media 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 present invention 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 by program the hardware of correlation can be instructed to complete, described 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 present invention 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 of the invention are stated, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as the limit to the present invention System, one of ordinary skill in the art can be changed to above-described embodiment, change, replace and become within the scope of the invention Type.

Claims (12)

  1. A kind of 1. image exposure processing method, it is characterised in that including:
    Detect the human face region in current scene;
    Determine the tooth regions in the human face region;
    Light-metering is carried out for the tooth regions, to obtain the exposure value of image;
    According to the exposure value shooting image, and output image.
  2. 2. image exposure processing method according to claim 1, it is characterised in that the face area in detection current scene Domain, including:
    The current scene is detected using facial recognition techniques;
    Obtain the human face region in the current scene detected.
  3. 3. image exposure processing method as claimed in claim 1, it is characterised in that determine the tooth area in the human face region Domain, including:
    Mouth region in the human face region is determined based on face recognition algorithms;
    The tooth regions are obtained according to the mouth region.
  4. 4. image exposure processing method as claimed in claim 3, it is characterised in that the tooth is obtained according to the mouth region Tooth region, including:
    Obtain the monochrome information and color characteristic in the mouth region;
    The tooth regions are determined according to the monochrome information and the color characteristic.
  5. 5. image exposure processing method as claimed in claim 1, it is characterised in that light-metering is carried out for the tooth regions, To obtain the exposure value of image, including:
    Light-metering is carried out to the tooth regions and obtains photometry result;
    The exposure value of described image is determined according to the target brightness value of the photometry result and the tooth regions.
  6. A kind of 6. image exposure processing unit, it is characterised in that including:
    Detection module, for detecting the human face region in current scene;
    Determining module, for determining the tooth regions in the human face region;
    Light-metering module, for carrying out light-metering for the tooth regions, to obtain the exposure value of image;
    Output module, for according to the exposure value shooting image, and output image.
  7. 7. image exposure processing unit as claimed in claim 6, it is characterised in that the detection module, be used for:
    The current scene is detected using facial recognition techniques;
    Obtain the human face region in the current scene detected.
  8. 8. image exposure processing unit as claimed in claim 6, it is characterised in that the determining module, be used for:
    Mouth region in the human face region is determined based on face recognition algorithms;
    The tooth regions are obtained according to the mouth region.
  9. 9. image exposure processing unit as claimed in claim 8, it is characterised in that the determining module, be used for:
    Obtain the monochrome information and color characteristic in the mouth region;
    The tooth regions are determined according to the monochrome information and the color characteristic.
  10. 10. image exposure processing unit as claimed in claim 6, it is characterised in that the light-metering module, be used for:
    Light-metering is carried out to the tooth regions and obtains photometry result;
    The exposure value of described image is determined according to the target brightness value of the photometry result and the tooth regions.
  11. 11. a kind of terminal device, it is characterised in that including following one or more assemblies:Housing and in the housing Processor, memory and display interface, wherein, the executable program generation that the processor is stored by reading in the memory Code runs program corresponding with the executable program code, for realizing the figure as described in any in claim 1-5 As the method for exposure-processed.
  12. 12. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, it is characterised in that the calculating The method that the image exposure processing as any one of claim 1-5 is realized when machine program is executed by processor.
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