CN106454303B - RGBW image processing methods and device - Google Patents
RGBW image processing methods and device Download PDFInfo
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- CN106454303B CN106454303B CN201610955800.8A CN201610955800A CN106454303B CN 106454303 B CN106454303 B CN 106454303B CN 201610955800 A CN201610955800 A CN 201610955800A CN 106454303 B CN106454303 B CN 106454303B
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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
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
- H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
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Abstract
A kind of RGBW image processing methods of present invention offer and device, this method include：Image to be displayed is received, the image data of the image to be displayed is indicated using rgb color pattern；Determine the memory colour region in the image to be displayed；Rgb color pattern is carried out to the conversion of RGBW color modes to the image to be displayed, obtains image data of the image to be displayed under RGBW color modes；Brightness adjustment is carried out to the pixel in memory colour region of the image to be displayed under RGBW color modes using gamma curve figure.This method carries out brightness adjustment after the memory colour region in determining image, to the image in memory colour region, to promote the brightness in memory colour region, to promote the subjective feeling of user.
Description
Technical field
The present invention relates to image processing techniques more particularly to a kind of RGBW image processing methods and device.
Background technology
RGBW display screens are a kind of new display screens developed on the basis of traditional RGB display screens, and traditional RGB is aobvious
Each pixel has tri- sub-pixels of R, G, B in display screen, and each pixel increases a sub-pixel W newly in RGBW display screens, i.e.,
Each sub-pixel has tetra- sub-pixels of R, G, B, W in RGBW display screens, wherein newly-increased W sub-pixel is white pixel.Due to
The transmitance of the colored filter of white pixel part is very high, so RGBW display screens can be provided compared to tradition RGB screens more
High brightness, and reduce the electric energy of backlight consumption.
In the prior art, RGBW display screens need to show after the RGB data received is converted to RGBW data.
Wherein, for colour of skin picture, since the quantity of R, G, B sub-pixel in RGBW display screens is less than R, G, B sub-pixel in RGB display screens
Quantity, therefore, for colour of skin picture after being converted to RGBW from RGB, display effect is partially dark.The pure colors such as blue sky, meadow are drawn
Face can cause its display effect partially dark due to following two：First, as pure color, due to R, G, B in RGBW display screens
The quantity of sub-pixel is less than the quantity of R, G, B sub-pixel in RGB display screens；Secondly, pure color is in the sub- pictures of one or two of RGB
The value of element is all 0, and after these pure color pictures are converted to RGBW data, corresponding W sub-pixel is generally also 0 or connects
Nearly 0.
The pure colors such as the colour of skin and meadow, blue sky belong to memory colour, by being analyzed above it is found that RGBW display screens show memory colour
When, the effect of shown picture is partially dark.And since human eye compares concern to memory colour, existing RGBW screens display note
The effect for recalling color picture is partially dark, can influence the subjective feeling of user.
Invention content
A kind of RGBW image processing methods of present invention offer and device are shown for solving RGBW display screens in the prior art
Remember the partially dark problem of color image.
First aspect present invention provides a kind of RGBW image processing methods, including：
Image to be displayed is received, the image data of the image to be displayed is indicated using rgb color pattern；
Determine the memory colour region in the image to be displayed；
Conversion of the rgb color pattern to RGBW color modes is carried out to the image to be displayed, obtains the figure to be shown
As the image data under RGBW color modes；
Using gamma curve figure to the pixel in memory colour region of the image to be displayed under RGBW color modes into
Row brightness adjustment.
Second aspect of the present invention provides a kind of RGBW image processing apparatus, including：
Receiving module, for receiving image to be displayed, the image data of the image to be displayed is come using rgb color pattern
It indicates；
Determining module, for determining the memory colour region in the image to be displayed；
Conversion module is obtained for carrying out conversion of the rgb color pattern to RGBW color modes to the image to be displayed
Image data of the image to be displayed under RGBW color modes；
The first adjustment module, for using note of the gamma curve figure to the image to be displayed under RGBW color modes
The pixel recalled in color region carries out brightness adjustment.
RGBW image processing methods and device provided by the present invention, first, memory colour region in determining image it
Afterwards, brightness adjustment is carried out to the image in memory colour region, to promote the brightness in memory colour region, to promote the subjectivity of user
Impression.Secondly, brightness adjustment only is carried out to the memory colour region determined in the present embodiment, rather than to entire image or figure
Other regions as in carry out brightness adjustment, and the region most paid close attention to due to the use of person is memory colour region, therefore, only to memory colour
Region, which carries out brightness adjustment, can promote the subjective feeling of user, and simultaneously, and need not be to the region of other in image
Brightness adjustment is carried out, therefore, the present embodiment also achieves while promoting user's subjective feeling, significantly reduces image
The complexity of processing saves the time of image procossing.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the present invention or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is the one of the present invention
A little embodiments for those of ordinary skill in the art without having to pay creative labor, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the comparison schematic diagram that RGB display screens and RGBW show shown pixel quantity；
Fig. 2 is the flow diagram of RGBW image processing methods embodiment one provided by the invention；
Fig. 3 is the flow diagram of RGBW image processing methods embodiment two provided by the invention；
Fig. 4 is the flow diagram of RGBW image processing methods embodiment three provided by the invention；
Fig. 5 is an example of the gamma curve figure of R sub-pixels；
Fig. 6 is the schematic diagram in the adjacent peripheral region in memory colour region；
Fig. 7 is the function structure chart of RGBW image processing apparatus embodiment one provided by the invention；
Fig. 8 is the function structure chart of RGBW image processing apparatus embodiment two provided by the invention；
Fig. 9 is the function structure chart of RGBW image processing apparatus embodiment three provided by the invention；
Figure 10 is the function structure chart of RGBW image processing apparatus example IV provided by the invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Before technical scheme of the present invention is discussed in detail, pure color picture display effect in RGBW display screens is introduced first
Partially dark reason.
By taking the TV for supporting RGBW as an example, the RGBW display screens in TV receive image information and are shown from the mainboard of TV
Show, under normal circumstances, the image received by RGBW display screens all uses RGB color pattern, i.e., each pixel in image data
With tri- sub-pixels of R, G, B, and when being shown in RGBW display screens, each pixel has tetra- sub- pictures of R, G, B, W in screen
Element, therefore, RGBW display screens needs convert the image of the RGB color pattern received, and transfer process is in image
The process of the W sub-pixel value of each pixel.
RGBW display screens generally calculate the value of W sub-pixel by existing R, G, B sub-pixel value.
It is exemplified below a kind of method that the value of W sub-pixel is calculated by R, G, B sub-pixel value：
Using the minimum value in tri- sub-pixels of R, G, B of input as W sub-pixel value, if input at this time is pure color, also
Be in RGB there are one or two sub-pixels value be 0, then W sub-pixel numerical value at this time also be 0, when being shown on RGBW screens,
W is 0, such as RGB color pattern (255,0,0) is converted to RGBW and just becomes (255,0,0,0) later.
From the above it is found that pure color picture is after RGB color pattern is converted to RGBW color modes, W sub-pixel
Value be usually 0.And other conversion methods also all there is a problem of it is same.Therefore, it is shown after may result in the conversion of pure color picture
Show that effect is partially dark.
And for part RGBW display screens, the transfer algorithm of RGB to RGBW is consolidated by the TCON chips in RGBW display screens
Surely it provides, therefore, it is impossible to improve the display effect of pure color picture by changing the transfer algorithm of RGB to RGBW.
In addition to above-mentioned reason, display effect is inclined after also in addition pure color and colour of skin picture being caused to convert there are one reason
Secretly.
Fig. 1 is the comparison schematic diagram that RGB display screens and RGBW show shown pixel quantity, as shown in Figure 1, RGB is aobvious
The sub-pixel quantity of display screen is that the sub-pixel quantity of 3840 × 3 × 2160, RGBW display screens is 2880 × 4 × 2160, therefore, with
In a line for R sub-pixels quantity, the R sub-pixel quantity in RGBW display screens is four points of R sub-pixels quantity in RGB display screens
Three.I.e. in RGBW display screens, the quantity of tri- sub-pixel of R, G, B is less than the quantity in RGB display screens and therefore also can
Display effect is partially dark after causing pure color picture to convert.
And pass through above-mentioned analysis it is found that the first above-mentioned reason can not solve by way of changing algorithm, above-mentioned the
Two kinds of reasons are the inherent feature of RGBW screens, can not also be changed, and therefore, the present invention proposes a kind of improvement RGBW images display effect
The scheme of fruit improves memory colour in picture after the conversion for completing RGB to RGBW by promoting the brightness in memory colour region
The display effect in region, to promote the subjective feeling of user.
Fig. 2 is the flow diagram of RGBW image processing methods embodiment one provided by the invention, and this method can be applied
In the equipment for possessing RGBW display screens, such as in LCD TV.It is all shown in this way in RGBW below the embodiment of the present invention
Illustrate for being executed in screen, however, it is desirable to explanation, this method are not limited to only execute in RGBW display screens, it can also
Reach same technique effect by executing this method in the other component in the equipment of RGBW display screens.As shown in Fig. 2, should
Method includes：
S101, image to be displayed is received, the image data of the image to be displayed is indicated using rgb color pattern.
RGBW display screens can receive the width image first before showing piece image, and specially the width image institute is right
The image data answered, image data received by RGBW display screens all indicate with RGB color pattern, i.e. each pixel of image
With three sub-pixels, each sub-pixel respectively possesses a sub-pixel value.Optionally, the image data of entire image can lead to
The form of a two-dimensional matrix is crossed to indicate and be received by RGBW display screens, per every a line of a line representative image in two-dimensional matrix
Pixel, it is each to arrange a sub-pixel for representing each pixel.
S102, memory colour region in image to be displayed is determined.
After receiving image to be displayed, RGBW display screens determine the memory colour region in image to be displayed first.Its
In, determine that the specific method in memory colour region is referred to the prior art, for example, proposing in the prior art a kind of based on image
Image feature amount come the method that determines the memory colour region in image, wherein image feature amount is the color to the image of input
It is distributed the factor having an impact, image feature amount can be obtained by the average brightness etc. of input picture, when image feature amount is by defeated
When entering the average brightness of image and obtaining, it can be found out by specific formula.It obtains image feature amount and then passes through image
Characteristic quantity determines memory colour region.
It should be noted that the memory colour region in piece image may have it is multiple, it is also possible to do not have, if in this step
It determines that memory colour region is not present in image to be displayed, then can not execute the conversion of subsequent pattern and memory colour region
Brightness adjustment operates.And if the memory colour region for determining in image to be displayed in this step has multiple, need to each
Memory colour region carries out brightness adjustment operation respectively.
For example, show to be a people in piece image, then in the width image, the corresponding region of face is one
Memory colour region, and the corresponding region of human hand is another memory colour region.
S103, conversion of the rgb color pattern to RGBW color modes is carried out to image to be displayed, obtain image to be displayed and exist
Image data under RGBW color modes.
After receiving image to be displayed, RGBW display screens can also carry out rgb color pattern to image to be displayed and arrive
The conversion of RGBW color modes.Wherein, the specific method for carrying out color mode conversion is referred to the prior art, for example, existing
A kind of method that color mode conversion is realized by brightness and grayscale conversion is proposed in technology, wherein by display screen
One group of RGB grayscale value of one group of pixel is converted to generate one group of first RGB brightness value, red according to the group first
Turquoise brightness value generates one group of saturation degree, and one group of mapping ratio is generated further according to this group of saturation degree and group the first RGB brightness value
Example value generates one group the further according to the minimum mapping ratio value in group the first RGB brightness value and group mapping ratio value
Two RGB brightness values generate one group of red, green, blue and white according to group the second RGB brightness value and this group of white sub-pixels brightness value
Brightness value is converted this group of red, green, blue and white brightness value to generate one group of red, green, blue and white grayscale value of this group of pixel.
It should be noted that in the present embodiment, step S102 is executed before step S103, i.e., first according to rgb color
Image data under pattern determines the memory colour region in image, and then carries out color mode conversion, such execution to image
Sequence can reduce complexity when determining memory colour region, the reason is that due to determining memory colour area under rgb color pattern
The complexity in domain will be well below the complexity for determining memory colour region under RGBW color modes.
S104, using gamma curve figure to the pixel in memory colour region of the image to be displayed under RGBW color modes
Carry out brightness adjustment.
In abovementioned steps, the corresponding RGBW image datas of image to be displayed are had been obtained for, and define and wait showing
Memory colour region in diagram picture, on this basis, so that it may bright to be carried out respectively under RGBW color modes to memory colour region
Degree adjustment.
Specifically, the present invention using gamma curve figure come the memory colour area to image to be displayed under RGBW color modes
Pixel in domain carries out brightness adjustment.Wherein, the gamma curve in gamma curve figure can be used for indicating pixel intensity and ash
The relationship of degree obtains the brightness value of the pixel after adjustment by adjusting the corresponding gamma curve of pixel in memory colour region, into
And improve the display effect in memory colour region further according to the brightness value of the pixel after adjustment.
It should be noted that in this step, brightness adjustment only is carried out to the pixel in the memory colour region in image to be displayed,
Rather than brightness adjustment is carried out to entire picture, such processing can make the aobvious of the region for the memory colour that user most pays close attention to
Show that effect is improved, promotes the subjective feeling of user, meanwhile, and reduce the number of pixel to be treated, it reduces
Handle complexity.
In the present embodiment, first, after the memory colour region in determining image, the image in memory colour region is carried out bright
Degree adjustment, to promote the brightness in memory colour region, to promote the subjective feeling of user.Secondly, only to true in the present embodiment
The memory colour region made carries out brightness adjustment, rather than carries out brightness tune to other regions in entire image or image
It is whole, it is memory colour region due to the use of the region that person most pays close attention to, therefore, only carrying out brightness adjustment to memory colour region can carry
The subjective feeling of user is risen, and simultaneously, and brightness adjustment, therefore, this implementation need not be carried out to the region of other in image
Example also achieves while promoting user's subjective feeling, significantly reduces the complexity of image procossing, saves image
The time of processing.
On the basis of the above embodiments, the present embodiment relates to whether to carry out memory colour region the judgement side of brightness adjustment
Method, that is, Fig. 3 is the flow diagram of RGBW image processing methods embodiment two provided by the invention, as shown in figure 3, this method
Implementation procedure is：
S201, image to be displayed is received, the image data of the image to be displayed is indicated using rgb color pattern.
The specific implementation procedure of this step is referred to abovementioned steps S101.
S202, memory colour region in image to be displayed is determined.
The specific implementation procedure of this step is referred to abovementioned steps S102.
S203, conversion of the rgb color pattern to RGBW color modes is carried out to image to be displayed, obtain image to be displayed and exist
Image data under RGBW color modes.
The specific implementation procedure of this step is referred to abovementioned steps S103.
S204, judge whether the dark pixel ratio in the first memory colour region is more than preset ratio, if so, executing
Otherwise S205 terminates.
Wherein, above-mentioned first memory colour region is any one memory colour region in image to be displayed, above-mentioned first note
It is that W sub-pixel is less than the first predetermined threshold value, and has 1 in R sub-pixels, G sub-pixel, B sub-pixels to recall the dark pixel in color region
A or 2 sub-pixels are less than the pixel of the second predetermined threshold value.
That is, in this step, dark pixel refers to the pixel for meeting following two conditions：
(1) W sub-pixel is less than the first predetermined threshold value
Wherein, above-mentioned first predetermined threshold value can be a value close to 0, and the first predetermined threshold value can obtain based on experience value
, or obtained according to practical measurement of image when practical partially dark.
As previously mentioned, when calculating W sub-pixel value according to R, G, B sub-pixel value using the prior art, if it is pure color, count
The value of the W sub-pixel of calculating is generally near 0, therefore, the present embodiment can by W sub-pixel value whether close to 0 as dark pixel
One Rule of judgment.
(2) there is 1 in R sub-pixels, G sub-pixel, B sub-pixels or 2 sub-pixels are less than the second predetermined threshold value.
Wherein, which indicates in R, G, B that some sub-pixel is 0 or the case where close to 0, in this case, image
It generally also can be partially dark.
Above-mentioned second predetermined threshold value can obtain based on experience value, or be measured according to practical when practical partially dark of image
It arrives.
When some pixel while meeting above-mentioned two condition, then can determine that the pixel is dark pixel.
It, can be using above-mentioned Rule of judgment come to the memory colour region for some memory colour region in image to be displayed
In each pixel carry out dark pixel judgement, so as to obtain whole dark pixel quantity in the memory colour region.
In turn, judge whether the dark pixel ratio in the memory colour region is more than preset ratio, if it does, then can be true
The fixed memory colour region is partially dark, needs to carry out brightness adjustment.
Wherein, above-mentioned preset ratio can obtain based on experience value, or the practical measurement according to image when practical partially dark
It obtains.
In this step, it is first determined whether the pixel in memory colour region is dark pixel, then is counted in memory colour region
Dark pixel ratio can accurately determine out whether the memory colour region needs to carry out brightness adjustment according to the two processes.
S205, using gamma curve figure to the pixel in memory colour region of the image to be displayed under RGBW color modes
Carry out brightness adjustment.
The specific implementation procedure of this step is referred to abovementioned steps S104.
In the present embodiment, before the brightness adjustment for carrying out memory colour region, the dark picture in memory colour region is first determined whether
Plain ratio, that is, judge whether memory colour region needs to carry out brightness adjustment, if it is desired, carries out the brightness tune in memory colour region again
It is whole, if it is not required, then no longer carrying out brightness adjustment, select to carry out according to the actual conditions in memory colour region to realize
Brightness adjustment.
In another embodiment, to the RGBW pattern corresponding to the memory colour region in image to be displayed in above-mentioned steps S104
Under image data carry out brightness adjustment when specific method be：
To R sub-pixels, G sub-pixel and the B sub-pixels of pixel in the first memory colour region respectively according to gamma curve figure into
Row brightness adjustment.
Wherein, above-mentioned first memory colour region is any one memory colour region, i.e. the present embodiment in image to be displayed
In, it is that brightness adjustment is independently executed to all memory colour regions in image to be displayed.
In turn, when some specific memory colour region carries out brightness adjustment, respectively to R sub-pixels, the G sub-pixel of pixel
Brightness adjustment is carried out according to gamma curve figure respectively with B sub-pixels, i.e., memory colour region is carried out respectively according to 3 sub-pixels
Brightness adjustment.Wherein, the method for carrying out brightness adjustment according to gamma curve figure per sub-pixel is identical, is with R sub-pixels below
Example introduces the specific method of brightness adjustment, and the luminance regulating method of G sub-pixel and W sub-pixel is identical as R sub-pixels, can be with R
The method of sub-pixel carries out, and is no longer repeated in the embodiment of the present invention.
Fig. 4 is the flow diagram of RGBW image processing methods embodiment three provided by the invention, as shown in figure 4, to the
The R sub-pixels of pixel are according to the detailed process of gamma curve figure progress brightness adjustment in one memory colour region：
S301, according to the grayscale accounting of the R sub-pixels of pixel in the first memory colour region, determine in the first memory colour region
The grayscale section to be adjusted of the R sub-pixels of pixel.
It is alternatively possible to get the grayscale of R sub-pixels in the first memory colour region by way of statistics with histogram
Accounting, to obtain the maximum grayscale section of R sub-pixel accountings.It is assumed to be in gamma curve figure shown in Fig. 5
The section [G1, G2].
S302, curve corresponding with grayscale section to be adjusted in the corresponding gamma curve figure of image to be displayed is carried out
Gamma values adjust.
Specifically, Fig. 5 is an example of the gamma curve figure of R sub-pixels, as shown in figure 5, the cross of gamma curve figure
Axis indicates that gray scale, the longitudinal axis indicate brightness.
With reference to Fig. 5, before carrying out brightness adjustment, the gamma curve of R sub-pixels is the thin curve in Fig. 5, ordinary circumstance
Under, the Gamma values of the curve are about 2.2, and after being adjusted to Gamma values, it is formed by new gamma curve (Fig. 5
In bold curve) in Gamma values can be 1, from fig. 5, it can be seen that for the sub-pixel of same grayscale, carrying out Gamma
After value adjustment, brightness is greatly improved.
S303, the brightness that the R sub-pixels of pixel in the first memory colour region are determined according to the curve graph after the adjustment of Gamma values
Value.
When Gamma values are adjusted and after form new gamma curve figure, so that it may with according to new gamma curve figure come
Directly acquire the brightness value of R sub-pixels.
In the present embodiment, when the R sub-pixels to specific memory colour region carry out brightness adjustment, in R sub-pixel accountings
Gamma value adjustment is carried out in most grey-scale ranges, to obtain new gamma curve, to obtain new brightness value.That is,
Entire gamma curve need not be adjusted, and only need the curve corresponding to the grey-scale range most to R sub-pixel accountings
Duan Jinhang Gamma values adjust, so that reducing answering for image-processing operations while realizing sub-pixel luminence adjustment
Miscellaneous degree improves the efficiency of image procossing.
On the basis of the above embodiments, the present embodiment is related to after the completion of the brightness adjustment to memory colour region, to memory
The method that the adjacent peripheral region in color region carries out brightness adjustment, specially：
The image under the RGBW color modes corresponding to adjacent peripheral region to the memory colour region in image to be displayed
Data carry out brightness adjustment.
Wherein, corresponding to the brightness adjustment of the image data under the RGBW color modes corresponding to above-mentioned adjacent peripheral region
Gamma values be less than memory colour region corresponding to RGBW color modes under image data brightness adjustment corresponding to
Gamma values.
Specifically, Fig. 6 is the schematic diagram in the adjacent peripheral region in memory colour region, as shown in Figure 6, it is assumed that some memory colour
Region is C1, then its adjacent peripheral region is C2 can also carry out brightness tune after having executed brightness adjustment to C1 to C2
It is whole, wherein Gamma values when C2 carries out brightness adjustment are less than Gamma values when C1 carries out brightness adjustment, so that memory colour
The brightness realization in region and its adjacent peripheral region seamlessly transits.
Further, it is that the further regional luminance promoted in image to be displayed centered on memory colour region is smoothed
It crosses, brightness adjustment can also be carried out again to the adjacent peripheral region in the adjacent peripheral region itself in memory colour region, for example, referring to
Fig. 6 can also carry out the adjacent peripheral region C3 of C2 again bright after the adjacent peripheral region C2 to C1 carries out brightness adjustment
Degree adjustment, wherein the Gamma values of C3 brightness adjustments are less than the Gamma values of C2 brightness adjustments, to further promote figure to be shown
Image brightness seamlessly transits.
And so on, can according to actual conditions come to more adjacent peripheral regions centered on memory colour region into
Row brightness adjustment.
Fig. 7 is the function structure chart of RGBW image processing apparatus embodiment one provided by the invention, as shown in fig. 7, the dress
Set including：
Receiving module 501, for receiving image to be displayed, the image data of the image to be displayed uses rgb color pattern
To indicate.
Determining module 502, for determining the memory colour region in image to be displayed.
Conversion module 503 is obtained for carrying out conversion of the rgb color pattern to RGBW color modes to image to be displayed
Image data of the image to be displayed under RGBW color modes.
The first adjustment module 504, for using memory of the gamma curve figure to image to be displayed under RGBW color modes
Pixel in color region carries out brightness adjustment.
For the device for realizing preceding method embodiment, implementing principle and technical effect are similar, and details are not described herein again.
Fig. 8 is the function structure chart of RGBW image processing apparatus embodiment two provided by the invention, as shown in figure 8, the dress
It sets and further includes：
Judgment module 505, for judging whether the dark pixel ratio in the first memory colour region is more than preset ratio, if
It is that brightness adjustment then is carried out to the image data under the RGBW pattern corresponding to the first memory colour region in image to be displayed,
Wherein, the first memory colour region is any one memory colour region in image to be displayed, the dark picture in the first memory colour region
Element, which is less than for W sub-pixel in the first predetermined threshold value and R sub-pixels, G sub-pixel, B sub-pixels, has 1 or 2 sub-pixel to be less than second
The pixel of predetermined threshold value.
In another embodiment, the first adjustment module 504 is specifically used for：
To R sub-pixels, G sub-pixel and the B sub-pixels of pixel in the first memory colour region respectively according to gamma curve figure into
Row brightness adjustment.
Fig. 9 is the function structure chart of RGBW image processing apparatus embodiment three provided by the invention, as shown in figure 9, first
Adjusting module 504 includes：
First determination unit 5041 is determined for the grayscale accounting according to the R sub-pixels of pixel in the first memory colour region
The grayscale section to be adjusted of the R sub-pixels of pixel in first memory colour region.
Adjustment unit 5042, for corresponding with grayscale section to be adjusted in the corresponding gamma curve figure of image to be displayed
Curve carry out Gamma value adjustment.
Second determination unit 5043 determines picture in the first memory colour region for the curve graph after being adjusted according to Gamma values
The brightness value of the R sub-pixels of element.
Wherein, the horizontal axis of the corresponding gamma curve figure of image to be displayed is gray scale, and the longitudinal axis is brightness.
Figure 10 is the function structure chart of RGBW image processing apparatus example IV provided by the invention, as shown in Figure 10, should
Device further includes：
Second adjustment module 506, corresponding to the adjacent peripheral region to the memory colour region in image to be displayed
Image data under RGBW color modes carries out brightness adjustment, wherein under the RGBW color modes corresponding to adjacent peripheral region
Image data brightness adjustment corresponding to Gamma values be less than memory colour region corresponding to RGBW color modes under image
Gamma values corresponding to the brightness adjustment of data.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer read/write memory medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or
The various media that can store program code such as person's CD.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of RGBW image processing methods, which is characterized in that including：
Image to be displayed is received, the image data of the image to be displayed is indicated using rgb color pattern；
Determine the memory colour region in the image to be displayed；
Rgb color pattern is carried out to the conversion of RGBW color modes to the image to be displayed, the image to be displayed is obtained and exists
Image data under RGBW color modes；
The pixel in memory colour region of the image to be displayed under RGBW color modes is carried out using gamma curve figure bright
Degree adjustment.
2. according to the method described in claim 1, it is characterized in that, described use gamma curve figure to the image to be displayed
Before pixel in memory colour region under RGBW color modes carries out brightness adjustment, further include：
Judge whether the dark pixel ratio in the first memory colour region is more than preset ratio, if so, to the image to be displayed
In the first memory colour region corresponding to RGBW pattern under image data carry out brightness adjustment, wherein it is described first memory
Color region is any one memory colour region in the image to be displayed, and the dark pixel in first memory colour region is W
Sub-pixel be less than in the first predetermined threshold value and R sub-pixels, G sub-pixel, B sub-pixels have 1 or 2 sub-pixels to be less than second pre-
If the pixel of threshold value.
3. according to the method described in claim 2, it is characterized in that, described use gamma curve figure to the image to be displayed
Pixel in memory colour region under RGBW color modes carries out brightness adjustment, including：
To R sub-pixels, G sub-pixel and the B sub-pixels of pixel in first memory colour region respectively according to gamma curve figure into
Row brightness adjustment.
4. according to the method described in claim 3, it is characterized in that, the R of pixel is sub in the region to first memory colour
Pixel carries out brightness adjustment according to gamma curve figure, including：
According to the grayscale accounting of the R sub-pixels of pixel in first memory colour region, determine in first memory colour region
The grayscale section to be adjusted of the R sub-pixels of pixel；
Curve corresponding with the grayscale section to be adjusted in the corresponding gamma curve figure of the image to be displayed is carried out
Gamma values adjust；
Curve graph after being adjusted according to Gamma values determines the brightness value of the R sub-pixels of pixel in the first memory colour region；
Wherein, the horizontal axis of the corresponding gamma curve figure of the image to be displayed is gray scale, and the longitudinal axis is brightness.
5. according to claim 1-4 any one of them methods, which is characterized in that described to be waited for described using gamma curve figure
After showing that the pixel in memory colour region of the image under RGBW color modes carries out brightness adjustment, further include：
The image under the RGBW color modes corresponding to adjacent peripheral region to the memory colour region in the image to be displayed
Data carry out brightness adjustment, wherein the brightness of the image data under RGBW color modes corresponding to the adjacent peripheral region
The corresponding Gamma values of adjustment are less than the brightness tune of the image data under the RGBW color modes corresponding to the memory colour region
Whole corresponding Gamma values.
6. a kind of RGBW image processing apparatus, which is characterized in that including：
Receiving module, for receiving image to be displayed, the image data of the image to be displayed carrys out table using rgb color pattern
Show；
Determining module, for determining the memory colour region in the image to be displayed；
Conversion module, for carrying out conversion of the rgb color pattern to RGBW color modes to the image to be displayed, described in acquisition
Image data of the image to be displayed under RGBW color modes；
The first adjustment module, for using memory colour of the gamma curve figure to the image to be displayed under RGBW color modes
Pixel in region carries out brightness adjustment.
7. device according to claim 6, which is characterized in that further include：
Judgment module, for judging whether the dark pixel ratio in the first memory colour region is more than preset ratio, if so, to institute
The image data stated under the RGBW pattern corresponding to the first memory colour region in image to be displayed carries out brightness adjustment, wherein
First memory colour region is any one memory colour region in the image to be displayed, in first memory colour region
Dark pixel be that W sub-pixel is less than in the first predetermined threshold value and R sub-pixels, G sub-pixel, B sub-pixels and has 1 or 2 sub- pictures
Element is less than the pixel of the second predetermined threshold value.
8. device according to claim 7, which is characterized in that the first adjustment module is specifically used for：
To R sub-pixels, G sub-pixel and the B sub-pixels of pixel in first memory colour region respectively according to gamma curve figure into
Row brightness adjustment.
9. device according to claim 8, which is characterized in that the first adjustment module includes：
First determination unit, described according to the grayscale accountings of the R sub-pixels of pixel in first memory colour region, determining
The grayscale section to be adjusted of the R sub-pixels of pixel in first memory colour region；
Adjustment unit, for corresponding with the grayscale section to be adjusted in the corresponding gamma curve figure of the image to be displayed
Curve carry out Gamma value adjustment；
Second determination unit determines the R pictures of pixel in the first memory colour region for the curve graph after being adjusted according to Gamma values
The brightness value of element；
Wherein, the horizontal axis of the corresponding gamma curve figure of the image to be displayed is gray scale, and the longitudinal axis is brightness.
10. according to claim 6-9 any one of them devices, which is characterized in that further include：
Second adjustment module, for the RGBW corresponding to the adjacent peripheral region to the memory colour region in the image to be displayed
Image data under color mode carries out brightness adjustment, wherein under the RGBW color modes corresponding to the adjacent peripheral region
Image data brightness adjustment corresponding to Gamma values be less than the memory colour region corresponding to RGBW color modes under
Gamma values corresponding to the brightness adjustment of image data.
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| CN107993269A (en) * | 2017-10-25 | 2018-05-04 | 维沃移动通信有限公司 | A kind of image processing method and mobile terminal |
| CN108492757B (en) * | 2018-03-30 | 2021-10-08 | 厦门天马微电子有限公司 | Driving method and driving unit for projection display device, and projection display device |
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