CN105872513A - White balance method based on environment characteristic value and white balance device based on environment characteristic value - Google Patents
White balance method based on environment characteristic value and white balance device based on environment characteristic value Download PDFInfo
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- CN105872513A CN105872513A CN201610435248.XA CN201610435248A CN105872513A CN 105872513 A CN105872513 A CN 105872513A CN 201610435248 A CN201610435248 A CN 201610435248A CN 105872513 A CN105872513 A CN 105872513A
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- color temperature
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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
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
Abstract
The embodiment of the invention discloses a white balance method based on an environment characteristic value and a white balance device based on the environment characteristic value and belongs to the technical field of image processing. The method comprises the following steps: analyzing an environment in which a terminal device is currently positioned, and determining the environment characteristic value of the environment in which the terminal device is currently positioned; when detecting that a camera function of the terminal device is started, determining a corresponding color temperature value according to the environment characteristic value; calibrating a white balance parameter of the camera function of the terminal device according to the color temperature value and a preset calibration algorithm. The white balance method based on the environment characteristic value is capable of judging a region band in which the terminal device is positioned according to different latitudes, automatically setting automatic white balance parameters and meeting the requirement for a reasonable sky display effect.
Description
Technical field
The present embodiments relate to technical field of image processing, particularly relate to a kind of white balance method based on environmental characteristic value and device.
Background technology
At present, photograph or camera function have become indispensable Core Feature in terminal unit, and along with the renewal of product consumption idea is upgraded, the Q factor of the camera function in terminal unit is required more and more higher by user.Wherein, white balance is a particularly important Q factor in photograph or camera function, white balance refers to the reduction to white object of digital camera or video camera, its degree of accuracy directly determines the chromaticity of shooting photo, its operation principle is the difference according to environment light source colour temperature, each color induction of regulation sensitive material, makes color balance.
In prior art, the white balance adjusting of photographing unit or video camera is all to preset manually to arrange, during realizing the present invention, inventor finds that prior art at least exists following defect: the degree of accuracy of white balance is affected by anthropic factor, and there is limitation, cause and environmental characteristic under varying environment, can not be well adapted to, cause white balance inaccuracy, reduce user experience.
Summary of the invention
Based on this, it is necessary to provide a kind of method and apparatus according to the adaptive a kind of white balance based on environmental characteristic value of varying environment feature.
A kind of white balance method based on environmental characteristic value, the method includes:
The environment being presently in terminal unit is analyzed, and determines the environmental characteristic value of the environment that described terminal unit is presently in；
When the camera function described terminal unit being detected starts, according to described environmental characteristic value, determine the color temperature value of correspondence；
According to described color temperature value and default calibration algorithm, calibrate the white balance parameter of the camera function of described terminal unit.
Wherein in an embodiment, described environmental characteristic value includes: latitude value and/or region band.
Wherein in an embodiment, described region band includes: the torrid zone, temperate zone and frigid zone.
Wherein in an embodiment, according to described environmental characteristic value, determine the color temperature value of correspondence, including:
Based on following corresponding relation, according to described environmental characteristic value, determine the color temperature value of correspondence；
Wherein, described corresponding relation include following at least one:
In described environmental characteristic value in time presetting first and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting the first color temperature value；
In described environmental characteristic value in time presetting second and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting the second color temperature value；
In described environmental characteristic value in time presetting the 3rd and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting tertiary color temperature value.
Wherein in an embodiment, according to described color temperature value and default calibration algorithm, calibrate the white balance parameter of the camera function of described terminal unit, including:
The reference value of the white balance parameter arranging the reference environment residing for described terminal unit is x；
According to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the southern side of described reference environment, calculate the white balance parameter of the camera function of described terminal unit according to the first formula；
According to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the north side of described reference environment, calculate the white balance parameter of the camera function of described terminal unit according to the second formula；
Wherein, described first formula is x(1-10%), described second formula is x(1+10%).
A kind of white balancing apparatus based on environmental characteristic value, including:
Eigenvalue determines module, is analyzed for the environment that is presently in terminal unit, determines the environmental characteristic value of the environment that described terminal unit is presently in；
Color temperature value determines module, during for starting at the camera function described terminal unit being detected, according to described environmental characteristic value, determines the color temperature value of correspondence；
Calibration module, for according to described color temperature value and default calibration algorithm, calibrates the white balance parameter of the camera function of described terminal unit.
Wherein in an embodiment, described environmental characteristic value includes: latitude value and/or region band.
Wherein in an embodiment, described region band includes: the torrid zone, temperate zone and frigid zone.
Wherein in an embodiment, described color temperature value determines that module is additionally operable in described environmental characteristic value in time presetting first and be interval, determines that the color temperature value corresponding with described environmental characteristic value is for presetting the first color temperature value；
In described environmental characteristic value in time presetting second and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting the second color temperature value；
In described environmental characteristic value in time presetting the 3rd and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting tertiary color temperature value.
Wherein in an embodiment, described calibration module includes: arrange unit, is x for arranging the reference value of the white balance parameter of the reference environment residing for described terminal unit；
First computing unit, for according to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the southern side of described reference environment, calculate the white balance parameter of the camera function of described terminal unit according to the first formula；
Second computing unit, according to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the north side of described reference environment, calculates the white balance parameter of the camera function of described terminal unit according to the second formula；
Wherein, described first formula is x(1-10%), described second formula is x(1+10%).
Above-mentioned white balance method based on environmental characteristic value and device, by being analyzed the environment being presently in terminal unit, determine the environmental characteristic value of the environment that terminal unit is presently in；When camera function terminal unit being detected starts, according to environmental characteristic value, determine the color temperature value of correspondence；According to color temperature value and default calibration algorithm, the white balance parameter of the camera function of calibrating terminal equipment.Above-mentioned white balance method based on environmental characteristic value is according to different latitude, it is judged that at the region band residing for terminal unit, automatically arrange AWB parameter, meets sky and reaches rational display effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of white balance method based on environmental characteristic value in one embodiment of the invention；
Fig. 2 is the schematic flow sheet of white balance method based on environmental characteristic value in another embodiment of the present invention；
Fig. 3 is the structural representation of white balancing apparatus based on environmental characteristic value in one embodiment of the invention；
Fig. 4 is the structural representation of white balancing apparatus based on environmental characteristic value in another embodiment of the present invention.
Detailed description of the invention
For making the purpose of the disclosure, technical scheme and advantage of greater clarity, below in conjunction with detailed description of the invention and referring to the drawings, the disclosure is further described.It should be understood that these describe the most exemplary, and it is not intended to limit the scope of the present disclosure.Additionally, in the following description, eliminate the description to known features and technology, to avoid unnecessarily obscuring the concept of the disclosure.
Embodiment one
Seeing Fig. 1, in an embodiment, it is provided that a kind of white balance method based on environmental characteristic value, the method comprises the following steps:
Step 102, is analyzed the environment residing for terminal unit, determines the environmental characteristic value of the environment that terminal unit is presently in.
In the present embodiment, environmental characteristic value includes: the latitude value residing for terminal unit and/or region band.Wherein, region band is to obtain according to latitude value, and the temperature of latitude value the highest region band is the lowest.Such as, region band be the torrid zone latitude value be minimum, region band be the latitude value in temperate zone be placed in the middle, region band be frigid zone latitude value be the highest.
Step 104, when camera function terminal unit being detected starts, according to environmental characteristic value, determines the color temperature value of correspondence.
In the present embodiment, the latitude value of the latitude environment residing for terminal unit is associated with color temperature value.Concrete, when the latitude value of latitude environment different residing for terminal unit, there is different color temperature values, the latitude value of the latitude environment residing for terminal unit is the highest, and corresponding color temperature value is the biggest.
Concrete, according to environmental characteristic value, determine the color temperature value of correspondence, including: based on following corresponding relation, according to environmental characteristic value, determine the color temperature value of correspondence；Wherein, corresponding relation include following at least one: in environmental characteristic value in time presetting first and be interval, determine that the color temperature value corresponding with environmental characteristic value is for presetting the first color temperature value；In environmental characteristic value in time presetting second and be interval, determine that the color temperature value corresponding with environmental characteristic value is for presetting the second color temperature value；In environmental characteristic value in time presetting the 3rd and be interval, determine that the color temperature value corresponding with environmental characteristic value is for presetting tertiary color temperature value.
It should be noted that owing to environmental characteristic value includes latitude value, the method can obtain color temperature value according to latitude value, environmental characteristic value also includes region band simultaneously, and the method can also obtain color temperature value according to region band.Such as, when the latitude of the latitude environment residing for terminal unit is 0-30 °, corresponding color temperature value is 6000K；When the latitude of the latitude environment residing for terminal unit is 30-60 °, corresponding color temperature value is 6500K；When the latitude of the latitude environment residing for terminal unit is 60-90 °, corresponding color temperature value is 8000K；In like manner, when the region band residing for terminal unit is the torrid zone, corresponding color temperature value is 6000K；When the region band residing for terminal unit is temperate zone, corresponding color temperature value is 6500K；When the region band residing for terminal unit is frigid zone, corresponding color temperature value is 8000K.
Step 106, according to color temperature value and default calibration algorithm, the white balance parameter of the camera function of calibrating terminal equipment.
In the present embodiment, according to color temperature value and default calibration algorithm, the white balance parameter of the camera function of calibrating terminal equipment, including: the reference value of the white balance parameter arranging the reference environment residing for terminal unit is x；According to color temperature value, it is judged that when the environment being presently in terminal unit is positioned at the southern side of reference environment, according to the white balance parameter of the camera function of the first formula computing terminal equipment；According to color temperature value, it is judged that when the environment being presently in terminal unit is positioned at the north side of reference environment, according to the white balance parameter of the camera function of the second formula computing terminal equipment；Wherein, the first formula is x(1-10%), the second formula is x(1+10%).
Above-mentioned white balance method based on environmental characteristic value, is analyzed by the environment being presently in terminal unit, determines the environmental characteristic value of the environment that terminal unit is presently in；When camera function terminal unit being detected starts, according to environmental characteristic value, determine the color temperature value of correspondence；According to color temperature value and default calibration algorithm, the white balance parameter of the camera function of calibrating terminal equipment.Above-mentioned white balance method based on environmental characteristic value is according to different latitude, it is judged that at the region band residing for terminal unit, automatically arrange AWB parameter, meets sky and reaches rational display effect.
Embodiment two
As in figure 2 it is shown, in one embodiment, it is provided that a kind of white balance method based on environmental characteristic value, the method comprises the following steps:
Step 201, determines the latitude value that terminal unit is presently in.
In the present embodiment, environmental characteristic value includes: the latitude value residing for terminal unit and/or region band.Wherein, the latitude value of the latitude environment residing for terminal unit is associated with color temperature value；When the latitude value of latitude environment different residing for terminal unit, there is different color temperature values；The latitude value of the latitude environment residing for terminal unit is the highest, and corresponding color temperature value is the biggest.Such as, when the latitude of the latitude environment residing for terminal unit is 0-30 °, corresponding color temperature value is 6000K；When the latitude of the latitude environment residing for terminal unit is 30-60 °, corresponding color temperature value is 6500K；When the latitude of the latitude environment residing for terminal unit is 60-90 °, corresponding color temperature value is 8000K.
Step 202, judges the region band residing for terminal unit according to environmental characteristic value.
Step 203, when camera function terminal unit being detected starts, according to environmental characteristic value, determines the color temperature value of correspondence.
Step 204, according to the color temperature value that terminal unit is current, and arranges reference value x of the white balance parameter of reference environment residing for terminal unit.
Step 205, when the environment residing for terminal unit is positioned at the southern side of reference environment, according to the white balance parameter of the first formula computing terminal equipment, wherein, the first formula is x(1-10%).Such as, reference value x with Pekinese's environment as white balance parameter, the white balance parameter in Shanghai is x(1-10%).
Step 206, when the environment residing for terminal unit is positioned at the north side of reference environment, according to the white balance parameter of the second formula computing terminal equipment, wherein, the second formula is x(1+10%).Such as, reference value x with Pekinese's environment as white balance parameter, Canadian white balance parameter is x(1+10%).
Embodiment three
Based on same inventive concept, in one embodiment, it is also proposed that a kind of white balancing apparatus based on environmental characteristic value.Such as Fig. 3, should include that eigenvalue determined that module 200, color temperature value determine module 400 and calibration module 600 by white balancing apparatus 10 based on environmental characteristic value.
Wherein, eigenvalue determines that module 200 is analyzed for the environment being presently in terminal unit, determines the environmental characteristic value of the environment that terminal unit is presently in；When color temperature value determines module 400 for starting at camera function terminal unit being detected, according to environmental characteristic value, determine the color temperature value of correspondence；Calibration module 600 is for according to color temperature value and default calibration algorithm, the white balance parameter of the camera function of calibrating terminal equipment.
In the present embodiment, color temperature value determines that module 400 is additionally operable in environmental characteristic value in time presetting first and be interval, determines that the color temperature value corresponding with environmental characteristic value is for presetting the first color temperature value；In environmental characteristic value in time presetting second and be interval, determine that the color temperature value corresponding with environmental characteristic value is for presetting the second color temperature value；In environmental characteristic value in time presetting the 3rd and be interval, determine that the color temperature value corresponding with environmental characteristic value is for presetting tertiary color temperature value.And environmental characteristic value includes: latitude value and/or region band；Region band includes: the torrid zone, temperate zone and frigid zone.
Further, the latitude value of the latitude environment residing for terminal unit is associated with color temperature value；Wherein, when the latitude value of latitude environment different residing for terminal unit, there is different color temperature values；The latitude value of the latitude environment residing for terminal unit is the highest, and corresponding color temperature value is the biggest.
Embodiment four
It addition, such as Fig. 4, in one embodiment, calibration module 600 includes arranging unit the 610, first computing unit 620 and the second computing unit 630.Concrete, arranging unit 610 for arranging the reference value of the white balance parameter of the reference environment residing for terminal unit is x；First computing unit 620 is for according to color temperature value, it is judged that when the environment being presently in terminal unit is positioned at the southern side of reference environment, according to the white balance parameter of the camera function of the first formula computing terminal equipment；Second computing unit 630 is according to color temperature value, it is judged that when the environment being presently in terminal unit is positioned at the north side of reference environment, according to the white balance parameter of the camera function of the second formula computing terminal equipment；Wherein, the first formula is x(1-10%), the second formula is x(1+10%).
Above-mentioned white balancing apparatus based on environmental characteristic value, first passes through the environment that eigenvalue determines that terminal unit is presently in by module 200 and is analyzed, and determines the environmental characteristic value of the environment that terminal unit is presently in；Determine that module 400, when camera function terminal unit being detected starts, according to environmental characteristic value, determines the color temperature value of correspondence by color temperature value again；Finally by calibration module 600 according to color temperature value and default calibration algorithm, the white balance parameter of the camera function of calibrating terminal equipment.Above-mentioned white balancing apparatus based on environmental characteristic value is according to different latitude, it is judged that at the region band residing for terminal unit, automatically arrange AWB parameter, meets sky and reaches rational display effect.
It will be appreciated by those skilled in the art that all or part of step realizing in above-described embodiment method can be by program and completes to instruct relevant hardware, this program is stored in a storage medium, including some instructions with so that an equipment (can be single-chip microcomputer, chip etc.) or processor (processor) perform all or part of step of method described in each embodiment of the application.And aforesaid storage medium includes: the various media that can store program code such as USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
It should be appreciated that the above-mentioned detailed description of the invention of the present invention is used only for exemplary illustration or explains the principle of the present invention, and it is not construed as limiting the invention.Therefore, any modification, equivalent substitution and improvement etc. done in the case of without departing from the spirit and scope of the present invention, should be included within the scope of the present invention.Additionally, claims of the present invention be intended to fall in the equivalents on scope and border or this scope and border whole change and modifications example.
Claims (10)
1. a white balance method based on environmental characteristic value, it is characterised in that including:
The environment being presently in terminal unit is analyzed, and determines the environmental characteristic value of the environment that described terminal unit is presently in；
When the camera function described terminal unit being detected starts, according to described environmental characteristic value, determine the color temperature value of correspondence；
According to described color temperature value and default calibration algorithm, calibrate the white balance parameter of the camera function of described terminal unit.
White balance method based on environmental characteristic value the most according to claim 1, it is characterised in that described environmental characteristic value includes: latitude value and/or region band.
White balance method based on environmental characteristic value the most according to claim 2, it is characterised in that described region band includes: the torrid zone, temperate zone and frigid zone.
4. according to the arbitrary described white balance method based on environmental characteristic value of claim 1-3, it is characterised in that according to described environmental characteristic value, determine the color temperature value of correspondence, including:
Based on following corresponding relation, according to described environmental characteristic value, determine the color temperature value of correspondence；
Wherein, described corresponding relation include following at least one:
In described environmental characteristic value in time presetting first and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting the first color temperature value；
In described environmental characteristic value in time presetting second and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting the second color temperature value；
In described environmental characteristic value in time presetting the 3rd and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting tertiary color temperature value.
5. according to the arbitrary described white balance method based on environmental characteristic value of claim 1-3, it is characterised in that according to described color temperature value and default calibration algorithm, calibrate the white balance parameter of the camera function of described terminal unit, including:
The reference value of the white balance parameter arranging the reference environment residing for described terminal unit is x；
According to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the southern side of described reference environment, calculate the white balance parameter of the camera function of described terminal unit according to the first formula；
According to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the north side of described reference environment, calculate the white balance parameter of the camera function of described terminal unit according to the second formula；
Wherein, described first formula is x(1-10%), described second formula is x(1+10%).
6. a white balancing apparatus based on environmental characteristic value, it is characterised in that including:
Eigenvalue determines module, is analyzed for the environment that is presently in terminal unit, determines the environmental characteristic value of the environment that described terminal unit is presently in；
Color temperature value determines module, during for starting at the camera function described terminal unit being detected, according to described environmental characteristic value, determines the color temperature value of correspondence；
Calibration module, for according to described color temperature value and default calibration algorithm, calibrates the white balance parameter of the camera function of described terminal unit.
White balancing apparatus based on environmental characteristic value the most according to claim 6, it is characterised in that described environmental characteristic value includes: latitude value and/or region band.
White balancing apparatus based on environmental characteristic value the most according to claim 7, it is characterised in that described region band includes: the torrid zone, temperate zone and frigid zone.
9. according to the arbitrary described white balancing apparatus based on environmental characteristic value of claim 6-8, it is characterized in that, described color temperature value determines that module is additionally operable in described environmental characteristic value in time presetting first and be interval, determines that the color temperature value corresponding with described environmental characteristic value is for presetting the first color temperature value；
In described environmental characteristic value in time presetting second and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting the second color temperature value；
In described environmental characteristic value in time presetting the 3rd and be interval, determine that the color temperature value corresponding with described environmental characteristic value is for presetting tertiary color temperature value.
10. according to the arbitrary described white balancing apparatus based on environmental characteristic value of claim 6-8, it is characterised in that described calibration module includes: arrange unit, is x for arranging the reference value of the white balance parameter of the reference environment residing for described terminal unit；
First computing unit, for according to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the southern side of described reference environment, calculate the white balance parameter of the camera function of described terminal unit according to the first formula；
Second computing unit, according to described color temperature value, it is judged that when the environment being presently in described terminal unit is positioned at the north side of described reference environment, calculates the white balance parameter of the camera function of described terminal unit according to the second formula；
Wherein, described first formula is x(1-10%), described second formula is x(1+10%).
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Application publication date: 20160817 |