CN104639925A - Method and device for converting image from RGB (red, green and blue) signals to RGBW (red, green, blue and white) signals - Google Patents
Method and device for converting image from RGB (red, green and blue) signals to RGBW (red, green, blue and white) signals Download PDFInfo
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- CN104639925A CN104639925A CN201510115332.9A CN201510115332A CN104639925A CN 104639925 A CN104639925 A CN 104639925A CN 201510115332 A CN201510115332 A CN 201510115332A CN 104639925 A CN104639925 A CN 104639925A
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Abstract
The invention discloses a method and a device for converting an image from RGB (red, green and blue) signals to RGBW (red, green, blue and white) signals. The method comprises the following steps: converting the received RGB signals into RGBW signals; extracting white pixels from the converted RGBW signals; carrying out image enhancement on the extracted white pixels, and superposing and outputting the white pixels together with the RGB signals. An arithmetical unit is simple; the phenomena such as halo shaking of the image can be relatively well solved; the picture display quality is improved.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of rgb signal to the image conversion method of RGBW signal and device.
Background technology
At present, in the image display of such as liquid crystal panel (LCD) and organic EL display panel (OLED), be form a pixel cell with red (R) sub-pixel unit, green (G) sub-pixel unit and blueness (B) sub-pixel unit, the color being blended required display by the gray value controlling each sub-pixel unit carrys out color display.Because RGB three primary colors luminous efficiency is lower, the products perfection of the display device be made up of RGB three primary colors can be restricted, based on this, there is the pixel cell be made up of red (R) sub-pixel unit, green (G) sub-pixel unit, blueness (B) sub-pixel unit and white (W) sub-pixel unit, to improve the luminous efficiency of RGB display.
At present, when showing for RGBW, in order to strengthen image display effect, the image enchancing method of employing is generally and all does isometric luminance compensation to pixels all in RGBW.But in this kind of mode, although image display effect strengthens, when image shows, there will be the harmful effects such as image halation, shake, affect picture quality.
Summary of the invention
The invention provides a kind of rgb signal to the image conversion method of RGBW signal and device, for solving when image shows, there will be the harmful effects such as image halation, shake, affecting the problem of picture quality.
Rgb signal, to an image conversion method for RGBW signal, comprising: the rgb signal received is converted to RGBW signal; Extract the white pixel in the RGBW signal after conversion; After the described white pixel extracted is carried out image enhaucament, superpose with rgb signal and export.
Rgb signal, to an image conversion apparatus for RGBW signal, comprising: converting unit, for the rgb signal received is converted to RGBW signal; Extraction unit, for extracting the white pixel in the RGBW signal after conversion; Image enhancing unit, after the described white pixel extracted is carried out image enhaucament, superposes with rgb signal and exports.
In the technical scheme of the above-mentioned proposition of the embodiment of the present invention, the rgb signal received is converted to RGBW signal, extract the white pixel in the RGBW signal after conversion, after the described white pixel extracted is carried out image enhaucament, superpose with rgb signal and export, compare image enhaucament mode under normal circumstances, in the technical scheme of the above-mentioned proposition of the embodiment of the present invention, the brightness of W signal is promoted separately, arithmetic element is simple, image can be solved preferably and occur the phenomenons such as halation shake, improving picture display quality.
Accompanying drawing explanation
Fig. 1 is in the embodiment of the present invention, and the rgb signal of proposition is to the image conversion method flow chart of RGBW signal;
Fig. 2 is in the embodiment of the present invention, and the rgb signal of proposition is to the image conversion logic chip composition schematic diagram of RGBW signal;
Fig. 3 is under normal circumstances, and rgb signal is to the image transition diagram of RGBW signal;
Fig. 4 is in the embodiment of the present invention, and the rgb signal of proposition is to the image transition diagram of RGBW signal;
Fig. 5 is in the embodiment of the present invention, and the rgb signal of proposition is to the image conversion apparatus structure composition schematic diagram of RGBW signal.
Embodiment
Below in conjunction with each accompanying drawing, the main of embodiment of the present invention technical scheme is realized principle, embodiment and set forth in detail the beneficial effect that should be able to reach.
Image processing process is the process of a data operation, processor is when doing floating-point operation, bit wide due to processor processes data is changeless, therefore loss of data can be produced, and then cause some information dropout in image, when under data handling procedure complicated situation, the possibility of loss of data is also larger, therefore there will be the bad phenomenon such as Guanyun, shake after image procossing, affect picture quality, the embodiment of the present invention proposes the image conversion method of a kind of rgb signal to RGBW signal, and as shown in Figure 1, its concrete handling process is as following:
Step 11, receives rgb signal.
Wherein, the rgb signal of reception can be the input signal of 8, and the data-signal that namely R, G, B tri-kinds of Color pair are answered can be represented by the gray value between 0 ~ 255.
Step 12, is converted to RGBW signal by the rgb signal received.
As shown in Figure 2, for the rgb signal of embodiment of the present invention proposition is to the image conversion logic chip composition schematic diagram of RGBW signal, the rgb signal received is done spatial alternation, is converted to RGBW signal.
Particularly, according to the following equation the rgb signal received can be done spatial alternation, be converted to RGBW signal:
W＝0.3R+0.6G+0.1B
R’＝R-K*W
G’＝G-K*W
B’＝B-K*W
Wherein, W is the W pixel obtained after spatial alternation, and R, G, B are the rgb signal received, and R ', G ', B ' are R, G, B pixels in the RGBW signal after spatial alternation, W is the white pixel in the RGBW signal after spatial alternation, and K is the gain coefficient of setting.
Step 13, extracts the white pixel in the RGBW signal after conversion.
Step 14, after the white pixel of extraction is carried out image enhaucament, superposes with rgb signal and exports.
Wherein, the described white pixel extracted is carried out image enhaucament, comprising:
First, using extract white pixel as brightness output valve.
Secondly, according to the brightness output valve that the luminance gain adjustment of setting obtains.
By the technical scheme of above-mentioned proposition, comparison diagram 3 and Fig. 4, rgb signal under normal circumstances wherein shown in Fig. 3 is changed to the image of RGBW signal, the rgb signal of the above-mentioned proposition of the embodiment of the present invention shown in Fig. 4 is to the image transition diagram of RGBW signal, avoid the impact on image quality when to carry out image enhaucament in RGBW space, and, in the process of carrying out image enhaucament, only relate to W loudness, effectively can reduce the logical block of the hardware processor participating in computing.
Correspondingly, the embodiment of the present invention proposes the image conversion apparatus of a kind of rgb signal to RGBW signal, as shown in Figure 5, comprising:
Converting unit 501, for being converted to RGBW signal by the rgb signal received;
Particularly, above-mentioned converting unit 501, specifically for the rgb signal received is done spatial alternation, is converted to RGBW signal.
Particularly, above-mentioned converting unit 501, specifically for according to the following equation the rgb signal received being done spatial alternation, is converted to RGBW signal:
W＝0.3R+0.6G+0.1B
R’＝R-K*W
G’＝G-K*W
B’＝B-K*W
Wherein, W is the W pixel obtained after spatial alternation, and R, G, B are the rgb signal received, and R ', G ', B ' are R, G, B pixels in the RGBW signal after spatial alternation, W is the white pixel in the RGBW signal after spatial alternation, and K is the gain coefficient of setting.
Extraction unit 502, for extracting the white pixel in the RGBW signal after conversion;
Image enhancing unit 503, after the described white pixel extracted is carried out image enhaucament, superposes with rgb signal and exports.
Particularly, above-mentioned image enhancing unit 503, specifically for will extract described white pixel as brightness output valve; According to the described brightness output valve that the luminance gain adjustment of setting obtains.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
When carrying out image enhancement operation under normal circumstances, the rgb signal received is carried out space transforming, be transformed in HSV space, then V is regulated, obtain because the brightness value in HSV space is averaged by input signal RGB, therefore when this kind of mode carries out image enhaucament, rgb signal is equivalent to carry out unifying synchronous brightness adjustment, therefore image can be made to occur the phenomenons such as halation shake, and in the technical scheme of the above-mentioned proposition of the embodiment of the present invention, the rgb signal received is converted to RGBW signal, extract the white pixel in the RGBW signal after conversion, after the described white pixel extracted is carried out image enhaucament, superpose with rgb signal and export, compare image enhaucament mode under normal circumstances, in the technical scheme of the above-mentioned proposition of the embodiment of the present invention, the brightness of W signal is promoted separately, arithmetic element is simple, image can be solved preferably and occur the phenomenons such as halation shake, improving picture display quality.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. rgb signal is to an image conversion method for RGBW signal, it is characterized in that, comprising:
The rgb signal received is converted to RGBW signal;
Extract the white pixel in the RGBW signal after conversion;
After the described white pixel extracted is carried out image enhaucament, superpose with rgb signal and export.
2. the method for claim 1, is characterized in that, the rgb signal received is converted to RGBW signal, comprises:
The rgb signal received is done spatial alternation, is converted to RGBW signal.
3. method as claimed in claim 2, is characterized in that, according to the following equation the rgb signal received is done spatial alternation, be converted to RGBW signal, comprise:
W＝0.3R+0.6G+0.1B
R’＝R-K*W
G’＝G-K*W
B’＝B-K*W
Wherein, W is the W pixel obtained after spatial alternation, and R, G, B are the rgb signal received, and R ', G ', B ' are R, G, B pixels in the RGBW signal after spatial alternation, W is the white pixel in the RGBW signal after spatial alternation, and K is the gain coefficient of setting.
4. the method for claim 1, is characterized in that, the described white pixel extracted is carried out image enhaucament, comprising:
Using the described white pixel of extraction as brightness output valve;
According to the described brightness output valve that the luminance gain adjustment of setting obtains.
5. rgb signal is to an image conversion apparatus for RGBW signal, it is characterized in that, comprising:
Converting unit, for being converted to RGBW signal by the rgb signal received;
Extraction unit, for extracting the white pixel in the RGBW signal after conversion;
Image enhancing unit, after the described white pixel extracted is carried out image enhaucament, superposes with rgb signal and exports.
6. device as claimed in claim 5, is characterized in that, described converting unit, specifically for the rgb signal received is done spatial alternation, is converted to RGBW signal.
7. device as claimed in claim 6, is characterized in that, described converting unit, specifically for according to the following equation the rgb signal received being done spatial alternation, being converted to RGBW signal:
W＝0.3R+0.6G+0.1B
R’＝R-K*W
G’＝G-K*W
B’＝B-K*W
Wherein, W is the W pixel obtained after spatial alternation, and R, G, B are the rgb signal received, and R ', G ', B ' are R, G, B pixels in the RGBW signal after spatial alternation, W is the white pixel in the RGBW signal after spatial alternation, and K is the gain coefficient of setting.
8. device as claimed in claim 5, is characterized in that, described image enhancing unit, specifically for the described white pixel that will extract as brightness output valve; According to the described brightness output valve that the luminance gain adjustment of setting obtains.
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| CN201510115332.9A CN104639925A (en) | 2015-03-16 | 2015-03-16 | Method and device for converting image from RGB (red, green and blue) signals to RGBW (red, green, blue and white) signals |
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| CN201510115332.9A CN104639925A (en) | 2015-03-16 | 2015-03-16 | Method and device for converting image from RGB (red, green and blue) signals to RGBW (red, green, blue and white) signals |
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| CN107315275A (en) * | 2017-07-05 | 2017-11-03 | 京东方科技集团股份有限公司 | Display methods, device and computer equipment |
| CN110491325A (en) * | 2019-08-23 | 2019-11-22 | 京东方科技集团股份有限公司 | Rendering method, device and the computer readable storage medium of RGB to RGBW |
| CN111614908A (en) * | 2020-05-29 | 2020-09-01 | Oppo广东移动通信有限公司 | Image processing method, image processing device, electronic equipment and storage medium |
| CN113840124A (en) * | 2021-10-12 | 2021-12-24 | 锐芯微电子股份有限公司 | Image processing method and system |
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Application publication date: 20150520 |