CN106507082A - The adjustment method of white balance and device - Google Patents
The adjustment method of white balance and device Download PDFInfo
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- CN106507082A CN106507082A CN201611232568.1A CN201611232568A CN106507082A CN 106507082 A CN106507082 A CN 106507082A CN 201611232568 A CN201611232568 A CN 201611232568A CN 106507082 A CN106507082 A CN 106507082A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
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Abstract
The invention discloses a kind of adjustment method of white balance, the method includes：Obtain the primitive stimulus value of the red, green, blue three primary colours of TV and original chromaticity coordinates corresponding with the primitive stimulus of three primary colours value respectively, and the target color coordinates of white balance debugging are set；Primitive stimulus value, the original chromaticity coordinates according to the three primary colours, the target color coordinates, and the incidence relation between the stimulus value gain of default chromaticity coordinates and the three primary colours is calculated, the target stimuluss value of the three primary colours corresponding with the target color coordinates is obtained；The white balance of the TV is debugged according to the target stimuluss value.The invention also discloses a kind of debugging apparatus of white balance.The present invention can improve the Efficiency and accuracy of TV white balance debugging.
Description
Technical field
The present invention relates to image display technology field, more particularly to adjustment method and the device of white balance.
Background technology
White balance is an index for describing red, green, blue three primary colours mixing white degree of accuracy after generating in display, and it is
Produce as electron image reproducing colors are true, that color rendition and tone process can be solved by white balance adjusting
Series of problems.Due to the difference that there is the aspects such as hardware and software between different terminals, different terminals are being put down in vain using identical
Colour cast can also be produced during weighing apparatus parameter, the display image quality of terminal is affected.By taking television terminal as an example, in the production process of television terminal
In, factory generally requires to be adjusted the white balance parameter of each television terminal, to reach preferably reduction color and carry
Rise the purpose of image quality.
In trichromatic system, become three thorns with the amount that light-metering reaches three kinds of primary colors (R, G, B) needed for color matching and stimulates is treated
Swash value, wherein, R represents red primaries quantity of stimulus, and G represents green primary color quantity of stimulus, and B represents blue primary quantity of stimulus.Existing white balance
Adjustment method is：According to general common sense, B is debugged first step by step, then another tune G or R step by step, finally makes chromaticity coordinates
(i.e. color coordinates, is the Precise Representation of glow color) reaches desired value, to complete white balance debugging.The defect of this method exists
In：Here white balance debugging does not have the concept of a quantization, and needs to adjust back and forth repeatedly, inefficiency, and adjusts
Degree of accuracy not high yet.
Content of the invention
Present invention is primarily targeted at proposing a kind of adjustment method of white balance and device, it is intended to improve TV white balance
The Efficiency and accuracy of debugging.
For achieving the above object, the present invention provides a kind of adjustment method of white balance, the adjustment method bag of the white balance
Include following steps：
The primitive stimulus value and primitive stimulus value pair with the three primary colours of the red, green, blue three primary colours of TV are obtained respectively
The original chromaticity coordinates that answers, and the target color coordinates of white balance debugging are set；
Primitive stimulus value, the original chromaticity coordinates according to the three primary colours, the target color coordinates, and default color
Incidence relation between the stimulus value gain of coordinate and the three primary colours is calculated, and is obtained corresponding with the target color coordinates
The target stimuluss value of the three primary colours；
The white balance of the TV is debugged according to the target stimuluss value.
Alternatively, the primitive stimulus value and the original with the three primary colours for obtaining the red, green, blue three primary colours of TV respectively
The corresponding original chromaticity coordinates of beginning stimulus value, and the step of the target color coordinates of white balance debugging are set before, also include：
Incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours is set.
Alternatively, described arrange between chromaticity coordinates and the stimulus value of the three primary colours incidence relation the step of include：
Obtain the experiment number that is tested based on the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours
According to；
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to the experimental data.
Alternatively, the incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to the experimental data
Step includes：
The X-coordinate value of chromaticity coordinates is calculated respectively with the stimulus value gain of red, green, blue three primary colours according to the experimental data
Rate of change, and the Y-coordinate value of chromaticity coordinates is respectively with the rate of change of the stimulus value gain of red, green, blue three primary colours；
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to result of calculation；
The primitive stimulus value according to the three primary colours, the original chromaticity coordinates, the target color coordinates, and default
Chromaticity coordinates and the stimulus value gain of the three primary colours between incidence relation calculated, obtain and the target color coordinates pair
The step of target stimuluss value of the three primary colours that answers, includes：
From the three primary colours select a kind of primary colours, using the primitive stimulus value of selected primary colours as the selected primary colours mesh
Mark stimulus value；
Primitive stimulus value, the primitive stimulus of other two kinds of primary colours according to the other two kinds of primary colours in the three primary colours
It is worth corresponding original chromaticity coordinates, the target color coordinates, and the X-coordinate value of chromaticity coordinates is respectively with other two kinds of primary colours
The rate of change of stimulus value gain, the Y-coordinate value of chromaticity coordinates are respectively with the rate of change of the stimulus value gain of other two kinds of primary colours
Calculated, obtained the target stimuluss value of other two kinds of primary colours corresponding with the target color coordinates.
Alternatively, the selected primary colours are green primary.
Additionally, for achieving the above object, the present invention also provides a kind of debugging apparatus of white balance, the debugging of the white balance
Device includes：
Acquisition module, for respectively obtain TV red, green, blue three primary colours primitive stimulus value and with the three primary colours
Primitive stimulus are worth corresponding original chromaticity coordinates, and arrange the target color coordinates of white balance debugging；
Computing module, sits for the primitive stimulus value according to the three primary colours, the original chromaticity coordinates, the aim colour
Mark, and the incidence relation between the stimulus value gain of default chromaticity coordinates and the three primary colours calculated, obtain with described
The target stimuluss value of the corresponding three primary colours of target color coordinates；
Debugging module, debugs to the white balance of the TV according to the target stimuluss value.
Alternatively, the debugging apparatus of the TV white balance also include：
Setup module, for arranging the incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours.
Alternatively, the setup module is additionally operable to：
Obtain the experiment number that is tested based on the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours
According to；
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to the experimental data.
Alternatively, the setup module is additionally operable to：According to the experimental data calculate chromaticity coordinates X-coordinate value respectively with
The rate of change of the stimulus value gain of red, green, blue three primary colours, and the Y-coordinate value of chromaticity coordinates is respectively with red, green, blue three primary colours
The rate of change of stimulus value gain；Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to result of calculation；
The computing module is additionally operable to：A kind of primary colours are selected from the three primary colours, by the primitive stimulus value of selected primary colours
Target stimuluss value as the selected primary colours；Primitive stimulus value according to the other two kinds of primary colours in the three primary colours, described
The primitive stimulus of other two kinds of primary colours are worth corresponding original chromaticity coordinates, the target color coordinates, and the X-coordinate value of chromaticity coordinates point
The rate of change of the other stimulus value gain with other two kinds of primary colours, the Y-coordinate value of chromaticity coordinates are respectively with other two kinds of bases
The rate of change of the stimulus value gain of color is calculated, and obtains the mesh of other two kinds of primary colours corresponding with the target color coordinates
Mark stimulus value.
Alternatively, the selected primary colours are green primary.
The present invention obtains the primitive stimulus value and the original thorn with the three primary colours of the red, green, blue three primary colours of TV respectively
Swash the corresponding original chromaticity coordinates of value, and the target color coordinates of white balance debugging are set；Primitive stimulus value according to the three primary colours,
The original chromaticity coordinates, between the target color coordinates, and the stimulus value gain of default chromaticity coordinates and the three primary colours
Incidence relation is calculated, and obtains the target stimuluss value of the three primary colours corresponding with the target color coordinates；According to the mesh
Mark stimulus value is debugged to the white balance of the TV.By the way, user need to only arrange the target of white balance debugging
Chromaticity coordinates, TV can just accurately calculate the target stimuluss value of red, green, blue three primary colours corresponding with target color coordinates, and root
The white balance of TV is debugged according to target stimuluss value such that it is able to improve the Efficiency and accuracy of white balance debugging.
Description of the drawings
Fig. 1 is the schematic flow sheet of the adjustment method first embodiment of white balance of the present invention；
Fig. 2 is the schematic flow sheet of the adjustment method second embodiment of white balance of the present invention；
Fig. 3 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of red primary；
Fig. 4 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of green primary；
Fig. 5 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of blue primary；
Fig. 6 is the high-level schematic functional block diagram of the debugging apparatus first embodiment of white balance of the present invention；
Fig. 7 is the high-level schematic functional block diagram of the debugging apparatus second embodiment of white balance of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only in order to explain the present invention.
The present invention provides a kind of adjustment method of TV white balance.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet of the adjustment method first embodiment of white balance of the present invention.Methods described bag
Include following steps：
Step S10, obtains the primitive stimulus value of red, green, blue three primary colours of TV and original with the three primary colours respectively
The corresponding original chromaticity coordinates of stimulus value, and the target color coordinates of white balance debugging are set；
In the present embodiment, TV is intelligent television, and the application scenarios of the present embodiment can be：Production in television terminal
During, factory is adjusted to the white balance parameter of each television terminal, to reach preferably reduction color, lifting image quality
Purpose；Or, in use, it is inconsistent with the colour temperature of TV factory state to detect TV colour temperature for intelligent television,
White balance debugging algorithm of the present invention can be started.
First, TV obtains the primitive stimulus value of red, green, blue three primary colours and corresponding with the primitive stimulus value of three primary colours respectively
Original chromaticity coordinates, the primitive stimulus value of the red, green, blue three primary colours for getting might as well be designated as R0, G0, B0 respectively, with R0,
The corresponding original chromaticity coordinates of G0, B0 is designated as (x0, y0)；Then, user can flexibly arrange white flat according to certain standard or experience
Target color coordinates might as well be designated as (x1, y1) by the target color coordinates of weighing apparatus debugging.
In above-mentioned steps, so-called three primary colours stimulus value is three kinds of primary colors for causing human body retina to certain color perception
Stimulation degree amount expression, namely in trichromatic system, reach what three kinds of primary colors needed for color matching stimulated with light-metering is treated
Amount；So-called chromaticity coordinates, is exactly the coordinate of color, and chromaticity coordinates (x, y) can determine a point on a chromaticity diagram, and this point is accurately
Glow color is illustrated, i.e.,：Chromaticity coordinates Precise Representation glow color.
The General Principle of white balance debugging is：In selected 3 kinds of primary colours (usually red, green, blue) light and specify its unit
After [R], [G], [B], for any given colourama F, its color equation can be write as：
F=R [R]+G [G]+B [B]；(formula one)
In above formula, R, G, B are referred to as tristimulus values, and respectively red primary stimulus value, green primary stimulus value, blue primary stimulates
Value, [R], [G], [B] represent red primary, green primary, blue primary respectively, and plus sige represents red primary, green primary, blue primary according to one
Certainty ratio mixes.The proportionate relationship of R, G, B determine colourity with colourama, as R=G=B, F is equal-energy white.Now
If the size of fine setting R, G, B, changes their proportionate relationship, so that it may change the colour temperature (sign light source colour) of white light, and its
Corresponding chromaticity coordinates (x, y) also can change therewith.
Easy to understand, for tri- amounts of R, G, B, different proportionate relationships characterizes different colors.So can keep
Wherein certain amount is constant, while changing the size of (increase reduces) other two amounts, so that it may make R, G, B have different ratios to close
System, can also represent any color in red, green, blue gamut range.It is of course also possible to finely tune R, G, B simultaneously, this is white flat
The General Principle of weighing apparatus debugging.
Step S20, primitive stimulus value, the original chromaticity coordinates according to the three primary colours, the target color coordinates, and
Incidence relation between the stimulus value gain of default chromaticity coordinates and the three primary colours is calculated, and obtains sitting with the aim colour
Mark the target stimuluss value of the corresponding three primary colours；
In the step, user can pre-set associating between chromaticity coordinates and the stimulus value gain of the three primary colours
System, the incidence relation can represent with function expression, can also be represented with graph mode that wherein, the stimulus value of three primary colours increases
Benefit is increment of the three primary colours stimulus value on the basis of primitive stimulus value.Then, original thorn of the TV according to the three primary colours for getting
Swash value R0, G0, B0, between original chromaticity coordinates (x0, y0), and chromaticity coordinates and the stimulus value gain of the three primary colours, associate pass
System is calculated, you can obtain the target stimuluss value of the three primary colours corresponding with target color coordinates.
Such as, the incidence relation between the stimulus value gain of chromaticity coordinates and three primary colours could be arranged to：R often lifts a list
Position, the mean change of x, y is Δ xr, Δ yr；G often lifts a unit, and the mean change of x, y is Δ xg, Δ yg；If B is often carried
Rise a unit, the mean change of x, y is Δ xb, Δ yb, now known original chromaticity coordinates (x0, y0), target color coordinates (x1,
Y1), change of the target color coordinates relative to original chromaticity coordinates can be calculated first, then according to Δ xr, Δ yr, Δ xg, Δ
Yg, Δ xb, Δ yb are translated into the change of tristimulus values, thus can according to known primitive stimulus value R0, G0, B0 and its
Changing value, calculates target stimuluss value R1, G1, B1.Certainly, the incidence relation between the stimulus value gain of chromaticity coordinates and three primary colours
Above-mentioned relation is not limited to, such as can also be included equivalence transformation of above-mentioned relation etc., be all contained within the scope of the present invention.
Step S30, debugs to the white balance of the TV according to the target stimuluss value.
After target stimuluss value is obtained, TV can change between red, green, blue three primary colours automatically according to target stimuluss value
Proportionate relationship, so that realize that white balance is debugged.Certainly, target stimuluss value can also be fed back to user by TV, by with
Family is debugged to white balance manually according to TV operation interface, flexibly can be arranged when being embodied as.
The present embodiment obtains the primitive stimulus value of the red, green, blue three primary colours of TV and original with the three primary colours respectively
The corresponding original chromaticity coordinates of stimulus value, and the target color coordinates of white balance debugging are set；Primitive stimulus according to the three primary colours
Value, the original chromaticity coordinates, between the target color coordinates, and the stimulus value gain of default chromaticity coordinates and the three primary colours
Incidence relation calculated, obtain the target stimuluss value of the three primary colours corresponding with the target color coordinates；According to described
Target stimuluss value is debugged to the white balance of the TV.By the way, user need to only arrange the mesh of white balance debugging
Mark chromaticity coordinates, TV can just accurately calculate the target stimuluss value of red, green, blue three primary colours corresponding with target color coordinates, and
The white balance of TV is debugged according to target stimuluss value such that it is able to improve the Efficiency and accuracy of white balance debugging.
Further, with reference to Fig. 2, Fig. 2 is the schematic flow sheet of the adjustment method second embodiment of white balance of the present invention.Base
In the embodiment shown in above-mentioned Fig. 1, before step S10, can also include：
Step S40, arranges the incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours.
In the present embodiment, user can arrange instruction to TV input in the white balance for needing to debug TV, so that
TV arranges the incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours.
Specifically, step S10 can include：
Step S11, is obtained and is tested based on the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours
Experimental data；
Step S12, arranges the incidence relation between chromaticity coordinates and the stimulus value of the three primary colours according to the experimental data.
In the present embodiment, the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours can pass through to test number
According to acquisition.Specifically, user can be tested by model machine first, and experimental data is input into TV to be debugged, TV then
Experimental data is analyzed, the incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to analysis result.
Certainly, user can also be analyzed to experimental data using related software, then analysis result is input into TV to be debugged, with
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is set.
Further, step S12 can include：
Step S121, calculates the X-coordinate value of chromaticity coordinates respectively with the thorn of red, green, blue three primary colours according to the experimental data
Swash the rate of change of value gain, and the Y-coordinate value of chromaticity coordinates is respectively with the rate of change of the stimulus value gain of red, green, blue three primary colours；
Step S122, arranges the incidence relation between chromaticity coordinates and the stimulus value of the three primary colours according to result of calculation；
Now step S20 can include：
Step S21, selectes a kind of primary colours from the three primary colours, and the primitive stimulus value of selected primary colours is selected as described
The target stimuluss value of primary colours；
Step S22, the primitive stimulus value, other two kinds of primary colours according to the other two kinds of primary colours in the three primary colours
Primitive stimulus are worth corresponding original chromaticity coordinates, the target color coordinates, and the X-coordinate value of chromaticity coordinates is respectively with described other two
The rate of change of the stimulus value gain of kind primary colours, the Y-coordinate value of chromaticity coordinates are respectively with the stimulus value gain of other two kinds of primary colours
Rate of change calculated, obtain the target stimuluss value of other two kinds of primary colours corresponding with the target color coordinates.
The initial value of R, G, B is set in an experiment as R=G=B=128, and with reference to Fig. 3, Fig. 3 is the chromaticity coordinates x that experiment is obtained,
Variation relation schematic diagrams of the y with the stimulus value gain of red primary.According to R/G/B=(128+X)/128/128, wherein X represents seat
The stimulus value gain of mark system transverse axis, i.e. red primary, it can be seen that with the increase of the stimulus value gain of red primary, x substantially increases
Greatly, y increases slightly, and chromaticity coordinates x, y are with variation relation closely linear relationships of the stimulus value gain of red primary, because
This, can make smoothing processing to the change curve that experiment is obtained, make chromaticity coordinates x, variation relations of the y with the stimulus value gain of red primary
For linear relationship, the x of chromaticity coordinates, rate of change Δ xr, Δ of the y-coordinate value with the stimulus value gain of red primary is then calculated respectively
yr.
Specifically, if corresponding chromaticity coordinates is (x_A0, y_A0) when the stimulus value gain of red primary is A0, corresponding when being A1
Chromaticity coordinates be (x_A1, y_A1), and A0, A1 should can differ 10 unit left sides near the original value R0 of R between A0 and A1
The right side, then Δ xr, Δ yr can be calculated as follows：
Δ xr=(x_A1-x_A0)/(A1-A0)；
Δ yr=(y_A1-y_A0)/(A1-A0).
With reference to Fig. 4, Fig. 4 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of green primary.
Can see, as the increase of the stimulus value gain of green primary, x are basically unchanged, y is significantly increased, and chromaticity coordinates x, and y is with green primary
Stimulus value gain variation relation also all closely linear relationship, in the same manner, the x of chromaticity coordinates, thorn of the y-coordinate value with green primary
Rate of change Δ xg, the Δ yg of sharp value gain can also refer to said method and try to achieve.
With reference to Fig. 5, Fig. 5 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of blue primary.
Can see, as the increase of the stimulus value gain of blue primary, x are obviously reduced, y is obviously reduced, and chromaticity coordinates x, and y is with blue primary
Stimulus value gain variation relation also all closely linear relationship, in the same manner, the x of chromaticity coordinates, thorn of the y-coordinate value with blue primary
Rate of change Δ xb, the Δ yb of sharp value gain can also refer to said method and try to achieve.
Although it should be noted that the rule of x, y with the linear change of stimulus value gain of three primary colours, for different ripples
The substandard red, green, blue three primary colours of length, its corresponding Δ xr, Δ yr, Δ xg, Δ yg, Δ xb, Δ yb are not quite similar, must
Must be calculated by experimental data and be obtained.
White balance is debugged according to this embodiment scheme, following relational expression should be met：
X1=(R1-R0) * Δ xr+ (G1-G0) * Δ xg+ (B1-B0) * Δ xb+x0；
Y1=(R1-R0) * Δ yr+ (G1-G0) * Δ yg+ (B1-B0) * Δ yb+y0；
Through description above, Δ xr, Δ yr, Δ xg, Δ yg, Δ xb, Δ yb, x0, y0, x1, y1 and R0, G0, B0 are equal
For known quantity, and R1, G1, B1 are unknown quantity, need to solve.
The General Principle of white balance is by the proportioning for adjusting tri- components of R, G, B, makes (x0, y0) to tend to (x1, y1)
Process.Easy to understand, for the proportionate relationships of the amount of R, G, B tri-, can fix therein some, debug other two and just may be used
Reach target.
It is assumed here that fixed G (G1=G0), debugs R, B, then has：
X1=(R1-R0) * Δ xr+ (B1-B0) * Δ xb+x0；
Y1=(R1-R0) * Δ yr+ (B1-B0) * Δ yb+y0；
According to above formula, solve R1, B1 and obtain：
R1=[Δ yb* (x1-x0)-Δ xb* (y1-y0)]/(Δ xr* Δ yb- Δ yr* Δ xb)+R0；
B1=[Δ yr* (x1-x0)-Δ xr* (y1-y0)]/(Δ xb* Δ yr- Δ yb* Δ xr)+B0；
In the same manner, if fixed R, solving G1, B1 has：
G1=[Δ yb* (x1-x0)-Δ xb* (y1-y0)]/(Δ xg* Δ yb- Δ yg* Δ xb)+G0；
B1=[Δ yg* (x1-x0)-Δ xg* (y1-y0)]/(Δ xb* Δ yg- Δ yb* Δ xg)+B0；
Again in the same manner, if fixed B, solving R1, G1 has：
R1=[Δ yg* (x1-x0)-Δ xg* (y1-y0)]/(Δ xr* Δ yg- Δ yr* Δ xg)+R0；
G1=[Δ yr* (x1-x0)-Δ xr* (y1-y0)]/(Δ xg* Δ yr- Δ yg* Δ xr)+G0；
Specific implementation process is：TV can select a kind of primary colours according to user instruction from three primary colours, by selected primary colours
Target stimuluss value of the primitive stimulus value as selected primary colours, then according to the primitive stimulus of the other two kinds of primary colours in three primary colours
The primitive stimulus of value, in addition two kinds of primary colours are worth corresponding original chromaticity coordinates, target color coordinates, and the X-coordinate value of chromaticity coordinates point
The rate of change of the other stimulus value gain with other two kinds of primary colours, the Y-coordinate value of chromaticity coordinates are respectively with the stimulation of other two kinds of primary colours
The rate of change of value gain is calculated, and obtains the target stimuluss value of other two kinds of primary colours corresponding with target color coordinates.
Further, the selected primary colours are green primary.In general, changing G largely can affect brightness, so
Substantially can select to keep G constant during debugging white balance, debug R and B to meet white balance demand.
Thus, TV obtains target stimuluss value R1 of three primary colours, G1, B1, and according to R1, G1, B1 can be to the white of TV
Balance is accurately debugged.
The present invention also provides a kind of debugging apparatus of white balance.
With reference to Fig. 6, Fig. 6 is the high-level schematic functional block diagram of the debugging apparatus first embodiment of white balance of the present invention.The dress
Put including：
Acquisition module 10, for respectively obtain TV red, green, blue three primary colours primitive stimulus value and with the three primary colours
Primitive stimulus be worth corresponding original chromaticity coordinates, and the target color coordinates of white balance debugging are set；
In the present embodiment, TV is intelligent television, and the application scenarios of the present embodiment can be：Production in television terminal
During, factory is adjusted to the white balance parameter of each television terminal, to reach preferably reduction color, lifting image quality
Purpose；Or, in use, it is inconsistent with the colour temperature of TV factory state to detect TV colour temperature for intelligent television,
White balance debugging algorithm of the present invention can be started.
First, acquisition module 10 obtains the primitive stimulus value and the primitive stimulus with three primary colours of red, green, blue three primary colours respectively
It is worth corresponding original chromaticity coordinates, the primitive stimulus value of the red, green, blue three primary colours for getting might as well be designated as R0, G0, B0 respectively,
Original chromaticity coordinates corresponding with R0, G0, B0 is designated as (x0, y0)；Then, user can be flexibly arranged according to certain standard or experience
Target color coordinates might as well be designated as (x1, y1) by the target color coordinates of white balance debugging.
In above-mentioned steps, so-called three primary colours stimulus value is three kinds of primary colors for causing human body retina to certain color perception
Stimulation degree amount expression, namely in trichromatic system, reach what three kinds of primary colors needed for color matching stimulated with light-metering is treated
Amount；So-called chromaticity coordinates, is exactly the coordinate of color, and chromaticity coordinates (x, y) can determine a point on a chromaticity diagram, and this point is accurately
Glow color is illustrated, i.e.,：Chromaticity coordinates Precise Representation glow color.
The General Principle of white balance debugging is：In selected 3 kinds of primary colours (usually red, green, blue) light and specify its unit
After [R], [G], [B], for any given colourama F, its color equation can be write as：
F=R [R]+G [G]+B [B]；(formula one)
In above formula, R, G, B are referred to as tristimulus values, and respectively red primary stimulus value, green primary stimulus value, blue primary stimulates
Value, [R], [G], [B] represent red primary, green primary, blue primary respectively, and plus sige represents red primary, green primary, blue primary according to one
Certainty ratio mixes.The proportionate relationship of R, G, B determine colourity with colourama, as R=G=B, F is equal-energy white.Now
If the size of fine setting R, G, B, changes their proportionate relationship, so that it may change the colour temperature (sign light source colour) of white light, and its
Corresponding chromaticity coordinates (x, y) also can change therewith.
Easy to understand, for tri- amounts of R, G, B, different proportionate relationships characterizes different colors.So can keep
Wherein certain amount is constant, while changing the size of (increase reduces) other two amounts, so that it may make R, G, B have different ratios to close
System, can also represent any color in red, green, blue gamut range.It is of course also possible to finely tune R, G, B simultaneously, this is white flat
The General Principle of weighing apparatus debugging.
Computing module 20, sits for the primitive stimulus value according to the three primary colours, the original chromaticity coordinates, the aim colour
Mark, and the incidence relation between the stimulus value gain of default chromaticity coordinates and the three primary colours calculated, obtain with described
The target stimuluss value of the corresponding three primary colours of target color coordinates；
In the step, user can pre-set associating between chromaticity coordinates and the stimulus value gain of the three primary colours
System, the incidence relation can represent with function expression, can also be represented with graph mode that wherein, the stimulus value of three primary colours increases
Benefit is increment of the three primary colours stimulus value on the basis of primitive stimulus value.Then, computing module 20 is according to the three primary colours for getting
Primitive stimulus value R0, G0, B0, original chromaticity coordinates (x0, y0), and between the stimulus value gain of chromaticity coordinates and the three primary colours
Incidence relation is calculated, you can obtain the target stimuluss value of the three primary colours corresponding with target color coordinates.
Such as, the incidence relation between the stimulus value gain of chromaticity coordinates and three primary colours could be arranged to：R often lifts a list
Position, the mean change of x, y is Δ xr, Δ yr；G often lifts a unit, and the mean change of x, y is Δ xg, Δ yg；If B is often carried
Rise a unit, the mean change of x, y is Δ xb, Δ yb, now known original chromaticity coordinates (x0, y0), target color coordinates (x1,
Y1), computing module 20 can calculate change of the target color coordinates relative to original chromaticity coordinates first, then according to Δ xr, Δ
Yr, Δ xg, Δ yg, Δ xb, Δ yb are translated into the change of tristimulus values, thus can be according to known primitive stimulus value
R0, G0, B0 and its changing value, calculate target stimuluss value R1, G1, B1.Certainly, the stimulus value gain of chromaticity coordinates and three primary colours it
Between incidence relation be not limited to above-mentioned relation, such as can also include equivalence transformation of above-mentioned relation etc., be all contained in the present invention
Within protection domain.
Debugging module 30, debugs to the white balance of the TV according to the target stimuluss value.
After target stimuluss value is obtained, debugging module 30 can change red, green, blue three primary colours automatically according to target stimuluss value
Between proportionate relationship, so as to realize that white balance is debugged.Certainly, target stimuluss value can also be fed back to use by TV
Family, is debugged to white balance according to operation interface manually by user, flexibly can be arranged when being embodied as.
The present embodiment acquisition module 10 obtains the primitive stimulus value of the red, green, blue three primary colours of TV respectively and with described three
The primitive stimulus of primary colours are worth corresponding original chromaticity coordinates, and arrange the target color coordinates of white balance debugging；20 basis of computing module
The primitive stimulus value of the three primary colours, the original chromaticity coordinates, the target color coordinates, and default chromaticity coordinates and described three
Incidence relation between the stimulus value gain of primary colours is calculated, and obtains the three primary colours corresponding with the target color coordinates
Target stimuluss value；Debugging module 30 is debugged to the white balance of the TV according to the target stimuluss value.By above-mentioned side
Formula, user need to only arrange the target color coordinates of white balance debugging, and TV can just accurately calculate corresponding with target color coordinates
The target stimuluss value of red, green, blue three primary colours, and the white balance of TV is debugged according to target stimuluss value such that it is able to carry
The Efficiency and accuracy of high white balance debugging.
Further, with reference to Fig. 7, Fig. 7 is that the functional module of the debugging apparatus second embodiment of white balance of the present invention is illustrated
Figure.Based on the embodiment shown in above-mentioned Fig. 6, described device can also include：
Setup module 40, for arranging the incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours.
In the present embodiment, user can arrange instruction to TV input in the white balance for needing to debug TV, so that
Setup module 40 arranges the incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours.
Further, the setup module 40 is additionally operable to：Obtain the stimulus value gain with the three primary colours based on chromaticity coordinates
Between the experimental data tested of incidence relation；According to the stimulation that the experimental data arranges chromaticity coordinates and the three primary colours
Incidence relation between value.
In the present embodiment, the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours can pass through to test number
According to acquisition.Specifically, user can be tested by model machine first, and experimental data is input into TV to be debugged then, arranged
Module 40 is analyzed to experimental data, arranges associating between chromaticity coordinates and the stimulus value of the three primary colours according to analysis result
Relation.Certainly, user can also be analyzed to experimental data using related software, then analysis result is input into electricity to be debugged
Depending on to arrange the incidence relation between chromaticity coordinates and the stimulus value of the three primary colours.
Further, the setup module 40 is additionally operable to：According to the X-coordinate value difference that the experimental data calculates chromaticity coordinates
With the rate of change of the stimulus value gain of red, green, blue three primary colours, and the Y-coordinate value of chromaticity coordinates is respectively with red, green, blue three primary colours
Stimulus value gain rate of change；Associating between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to result of calculation
System；
The computing module 20 is additionally operable to：A kind of primary colours are selected from the three primary colours, by the primitive stimulus of selected primary colours
It is worth the target stimuluss value as the selected primary colours；Primitive stimulus value, institute according to the other two kinds of primary colours in the three primary colours
State the corresponding original chromaticity coordinates of primitive stimulus value of other two kinds of primary colours, the target color coordinates, and the X-coordinate value of chromaticity coordinates
Respectively with the rate of change of the stimulus value gain of other two kinds of primary colours, chromaticity coordinates Y-coordinate value respectively with described other two kinds
The rate of change of the stimulus value gain of primary colours is calculated, and obtains other two kinds of primary colours corresponding with the target color coordinates
Target stimuluss value.
The initial value of R, G, B is set in an experiment as R=G=B=128, and with reference to Fig. 3, Fig. 3 is the chromaticity coordinates x that experiment is obtained,
Variation relation schematic diagrams of the y with the stimulus value gain of red primary.According to R/G/B=(128+X)/128/128, wherein X represents seat
The stimulus value gain of mark system transverse axis, i.e. red primary, it can be seen that with the increase of the stimulus value gain of red primary, x substantially increases
Greatly, y increases slightly, and chromaticity coordinates x, y are with variation relation closely linear relationships of the stimulus value gain of red primary, because
This, can make smoothing processing to the change curve that experiment is obtained, make chromaticity coordinates x, variation relations of the y with the stimulus value gain of red primary
For linear relationship, the x of chromaticity coordinates, rate of change Δ xr, Δ of the y-coordinate value with the stimulus value gain of red primary is then calculated respectively
yr.
Specifically, if corresponding chromaticity coordinates is (x_A0, y_A0) when the stimulus value gain of red primary is A0, corresponding when being A1
Chromaticity coordinates be (x_A1, y_A1), and A0, A1 should can differ 10 unit left sides near the original value R0 of R between A0 and A1
The right side, then Δ xr, Δ yr can be calculated as follows：
Δ xr=(x_A1-x_A0)/(A1-A0)；
Δ yr=(y_A1-y_A0)/(A1-A0).
With reference to Fig. 4, Fig. 4 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of green primary.
Can see, as the increase of the stimulus value gain of green primary, x are basically unchanged, y is significantly increased, and chromaticity coordinates x, and y is with green primary
Stimulus value gain variation relation also all closely linear relationship, in the same manner, the x of chromaticity coordinates, thorn of the y-coordinate value with green primary
Rate of change Δ xg, the Δ yg of sharp value gain can also refer to said method and try to achieve.
With reference to Fig. 5, Fig. 5 is to test the chromaticity coordinates x for obtaining, variation relation schematic diagrams of the y with the stimulus value gain of blue primary.
Can see, as the increase of the stimulus value gain of blue primary, x are obviously reduced, y is obviously reduced, and chromaticity coordinates x, and y is with blue primary
Stimulus value gain variation relation also all closely linear relationship, in the same manner, the x of chromaticity coordinates, thorn of the y-coordinate value with blue primary
Rate of change Δ xb, the Δ yb of sharp value gain can also refer to said method and try to achieve.
Although it should be noted that the rule of x, y with the linear change of stimulus value gain of three primary colours, for different ripples
The substandard red, green, blue three primary colours of length, its corresponding Δ xr, Δ yr, Δ xg, Δ yg, Δ xb, Δ yb are not quite similar, must
Must be calculated by experimental data and be obtained.
White balance is debugged according to this embodiment scheme, following relational expression should be met：
X1=(R1-R0) * Δ xr+ (G1-G0) * Δ xg+ (B1-B0) * Δ xb+x0；
Y1=(R1-R0) * Δ yr+ (G1-G0) * Δ yg+ (B1-B0) * Δ yb+y0；
Through description above, Δ xr, Δ yr, Δ xg, Δ yg, Δ xb, Δ yb, x0, y0, x1, y1 and R0, G0, B0 are equal
For known quantity, and R1, G1, B1 are unknown quantity, need to solve.
The General Principle of white balance is by the proportioning for adjusting tri- components of R, G, B, makes (x0, y0) to tend to (x1, y1)
Process.Easy to understand, for the proportionate relationships of the amount of R, G, B tri-, can fix therein some, debug other two and just may be used
Reach target.
It is assumed here that fixed G (G1=G0), debugs R, B, then has：
X1=(R1-R0) * Δ xr+ (B1-B0) * Δ xb+x0；
Y1=(R1-R0) * Δ yr+ (B1-B0) * Δ yb+y0；
According to above formula, solve R1, B1 and obtain：
R1=[Δ yb* (x1-x0)-Δ xb* (y1-y0)]/(Δ xr* Δ yb- Δ yr* Δ xb)+R0；
B1=[Δ yr* (x1-x0)-Δ xr* (y1-y0)]/(Δ xb* Δ yr- Δ yb* Δ xr)+B0；
In the same manner, if fixed R, solving G1, B1 has：
G1=[Δ yb* (x1-x0)-Δ xb* (y1-y0)]/(Δ xg* Δ yb- Δ yg* Δ xb)+G0；
B1=[Δ yg* (x1-x0)-Δ xg* (y1-y0)]/(Δ xb* Δ yg- Δ yb* Δ xg)+B0；
Again in the same manner, if fixed B, solving R1, G1 has：
R1=[Δ yg* (x1-x0)-Δ xg* (y1-y0)]/(Δ xr* Δ yg- Δ yr* Δ xg)+R0；
G1=[Δ yr* (x1-x0)-Δ xr* (y1-y0)]/(Δ xg* Δ yr- Δ yg* Δ xr)+G0；
Specific implementation process is：Setup module 40 can select a kind of primary colours according to user instruction from three primary colours, will select
Target stimuluss value of the primitive stimulus value of primary colours as selected primary colours, then computing module 20 is according to other two kinds in three primary colours
The primitive stimulus of the primitive stimulus value of primary colours, in addition two kinds of primary colours are worth corresponding original chromaticity coordinates, target color coordinates, and color is sat
Target X-coordinate value respectively with the rate of change of the stimulus value gain of other two kinds of primary colours, chromaticity coordinates Y-coordinate value respectively with other two
The rate of change for planting the stimulus value gain of primary colours is calculated, and obtains the target thorn of other two kinds of primary colours corresponding with target color coordinates
Swash value.
Further, the selected primary colours are green primary.In general, changing G largely can affect brightness, so
Substantially can select to keep G constant during debugging white balance, debug R and B to meet white balance demand.
Thus, TV obtains target stimuluss value R1 of three primary colours, G1, B1, and, according to R1, G1, B1 can for debugging module 30
The white balance of TV is accurately debugged.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of adjustment method of white balance, it is characterised in that the adjustment method of the white balance comprises the steps：
The primitive stimulus value of red, green, blue three primary colours of TV and with the primitive stimulus of three primary colours value corresponding is obtained respectively
Original chromaticity coordinates, and the target color coordinates of white balance debugging are set；
Primitive stimulus value, the original chromaticity coordinates according to the three primary colours, the target color coordinates, and default chromaticity coordinates
And the incidence relation between the stimulus value gain of the three primary colours is calculated, obtain corresponding with the target color coordinates described
The target stimuluss value of three primary colours；
The white balance of the TV is debugged according to the target stimuluss value.
2. the adjustment method of white balance as claimed in claim 1, it is characterised in that the red, green, blue for obtaining TV respectively
The primitive stimulus value of three primary colours and original chromaticity coordinates corresponding with the primitive stimulus of three primary colours value, and white balance debugging is set
Target color coordinates the step of before, also include：
Incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours is set.
3. the adjustment method of white balance as claimed in claim 2, it is characterised in that the setting chromaticity coordinates and the three primary colours
Stimulus value between incidence relation the step of include：
Obtain the experimental data that is tested based on the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours；
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to the experimental data.
4. the adjustment method of white balance as claimed in claim 3, it is characterised in that chromaticity coordinates is arranged according to the experimental data
And the step of incidence relation between the stimulus value of the three primary colours, includes：
The X-coordinate value of chromaticity coordinates is calculated respectively with the change of the stimulus value gain of red, green, blue three primary colours according to the experimental data
Rate, and the Y-coordinate value of chromaticity coordinates is respectively with the rate of change of the stimulus value gain of red, green, blue three primary colours；
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to result of calculation；
The primitive stimulus value according to the three primary colours, the original chromaticity coordinates, the target color coordinates, and default color
Incidence relation between the stimulus value gain of coordinate and the three primary colours is calculated, and is obtained corresponding with the target color coordinates
The step of target stimuluss value of the three primary colours, includes：
A kind of primary colours are selected from the three primary colours, and the primitive stimulus value of selected primary colours is pierced as the target of the selected primary colours
Swash value；
Primitive stimulus value, the primitive stimulus value pair of other two kinds of primary colours according to the other two kinds of primary colours in the three primary colours
The original chromaticity coordinates answered, the target color coordinates, and the X-coordinate value of chromaticity coordinates is respectively with the stimulation of other two kinds of primary colours
The rate of change of value gain, the Y-coordinate value of chromaticity coordinates are carried out with the rate of change of the stimulus value gain of other two kinds of primary colours respectively
Calculate, obtain the target stimuluss value of other two kinds of primary colours corresponding with the target color coordinates.
5. the adjustment method of white balance as claimed in claim 4, it is characterised in that the selected primary colours are green primary.
6. a kind of debugging apparatus of white balance, it is characterised in that the debugging apparatus of the white balance include：
Acquisition module, for obtaining the primitive stimulus value of red, green, blue three primary colours of TV and original with the three primary colours respectively
The corresponding original chromaticity coordinates of stimulus value, and the target color coordinates of white balance debugging are set；
Computing module, for the primitive stimulus value according to the three primary colours, the original chromaticity coordinates, the target color coordinates, with
And the incidence relation between the stimulus value gain of default chromaticity coordinates and the three primary colours is calculated, obtain and the aim colour
The target stimuluss value of the corresponding three primary colours of coordinate；
Debugging module, debugs to the white balance of the TV according to the target stimuluss value.
7. debugging apparatus of white balance as claimed in claim 6, it is characterised in that the debugging apparatus of the white balance are also wrapped
Include：
Setup module, for arranging the incidence relation between chromaticity coordinates and the stimulus value gain of the three primary colours.
8. debugging apparatus of white balance as claimed in claim 7, it is characterised in that the setup module is additionally operable to：
Obtain the experimental data that is tested based on the incidence relation between the stimulus value gain of chromaticity coordinates and the three primary colours；
Incidence relation between chromaticity coordinates and the stimulus value of the three primary colours is arranged according to the experimental data.
9. debugging apparatus of white balance as claimed in claim 8, it is characterised in that the setup module is additionally operable to：According to institute
State experimental data the X-coordinate value of chromaticity coordinates is calculated respectively with the rate of change of the stimulus value gain of red, green, blue three primary colours, Yi Jise
The Y-coordinate value of coordinate is respectively with the rate of change of the stimulus value gain of red, green, blue three primary colours；Chromaticity coordinates is arranged according to result of calculation
And the incidence relation between the stimulus value of the three primary colours；
The computing module is additionally operable to：From the three primary colours select a kind of primary colours, using the primitive stimulus value of selected primary colours as
The target stimuluss value of the selected primary colours；Primitive stimulus value according to the other two kinds of primary colours in the three primary colours, described in addition
The primitive stimulus of two kinds of primary colours are worth corresponding original chromaticity coordinates, the target color coordinates, and the X-coordinate value of chromaticity coordinates respectively with
The rate of change of the stimulus value gain of other two kinds of primary colours, the Y-coordinate value of chromaticity coordinates are respectively with other two kinds of primary colours
The rate of change of stimulus value gain is calculated, and obtains the target thorn of other two kinds of primary colours corresponding with the target color coordinates
Swash value.
10. debugging apparatus of white balance as claimed in claim 9, it is characterised in that the selected primary colours are green primary.
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| CN113038110A (en) * | 2021-03-11 | 2021-06-25 | 深圳康佳电子科技有限公司 | White balance calibration method and device, terminal equipment and storage medium |
| CN113038110B (en) * | 2021-03-11 | 2022-12-20 | 深圳康佳电子科技有限公司 | White balance calibration method, device, terminal equipment and storage medium |
| CN113129813A (en) * | 2021-04-23 | 2021-07-16 | 利亚德光电股份有限公司 | White balance adjusting method and device and computer equipment |
| CN115550629A (en) * | 2021-06-29 | 2022-12-30 | 广州视琨电子科技有限公司 | Image quality adjusting method and device, storage medium and electronic equipment |
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