CN101080027A - Method for improving difference of LCD image quality under different watching mode - Google Patents
Method for improving difference of LCD image quality under different watching mode Download PDFInfo
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- CN101080027A CN101080027A CN 200610084437 CN200610084437A CN101080027A CN 101080027 A CN101080027 A CN 101080027A CN 200610084437 CN200610084437 CN 200610084437 CN 200610084437 A CN200610084437 A CN 200610084437A CN 101080027 A CN101080027 A CN 101080027A
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- lcd
- spatial domain
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- image quality
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Abstract
This invention relates to a method for improving difference of LCD image quality under different view modules including: transforming image data from a spatial domain with luminance and chrominance signals to one having three-color signals, then adjusting the brightness, color and contrast parameter values of said LCD based on the brightness, color and contrast expressions of said image data in the spatial domain, then converting the spatial domain with three-color signals to the spatial domain with brightness and chrominance signals from the domain with three-color signals and finally, displaying said image data on the adjusted LCD.
Description
Technical field
The present invention relates to a kind of method that is used to improve the difference of LCD (LCD) quality of image under different watching mode (view module), refer to a kind of method that is used to improve the difference that LCD image quality caused by live preview pattern (LiveView module) and play mode (playback module) especially.
Background technology
Provide people to good times add in honour of mode have many, and the highest real symbolic animal of the birth year sheet of frequency of utilization wherein, no matter because be travelling, party or even all memorable moment, all can be by camera record in addition, for user's memory in the future.In addition, have the image data of being about to take the photograph certainly in the use based on digital camera and be sent to the convenience of making an amendment processing in the electronic equipment (for example computer), add its price and gradually fall, so use the digital camera person day by day to increase.
In general, because the relation of the dark angle of camera lens (lens shading) makes the quality of image (image quality) of digital camera when live preview (LiveView) produce serious dark angle problem on LCD.Therefore, general known solution is: use one group of preview an ancient woman's ornament agate value (previewgamma) to reduce the influence at dark angle, yet employed normally image capture an ancient woman's ornament agate value (capture gamma) during because take pictures, therefore produce the situation that same LCD is used two groups of different gamma values, and then had difference on brightness and the color at the image of seeing on the LCD when causing live preview and image broadcast.
So as from the foregoing, above-mentioned known digital camera produces the problem of the difference on brightness and the color because of the difference of gamma value, on reality is used, obviously have inconvenience and exist with shortcoming, need be improved.
Summary of the invention
The present invention relates to a kind of method that is used to improve the difference of LCD image quality under different watching mode.The present invention is by the conversion and the correction in YUV territory and RGB territory, known to improve because of the difference of different caused LCD image in color and brightness of preview an ancient woman's ornament agate value with image capture an ancient woman's ornament agate value, the method has splendid correction effect for seriously drawing when the dark angle of camera lens when ringing Image lens.By this, it is consistent as much as possible that the present invention can make take pictures back lightness and the color seen of camera when live preview is play with image.
In order to solve the problems of the technologies described above, according to wherein a kind of scheme of the present invention, a kind of method that is used to improve the difference of LCD image quality under different watching mode is provided, its step comprises: at first, with an image data (image data), be converted to one from a spatial domain (spatial domain) with brightness (luminance) and colourity (chrominance) signal and have the spatial domain of tristimulus signal; Then, have in the spatial domain of tristimulus signal, according to the required brightness performance of this image data, color performance and/or contrast performance, with luminance parameter value, color parameter value and/or the contrast level parameter value of adjusting this LCD respectively at this; Then, this image data is changed to the spatial domain with brightness and carrier chrominance signal from this transform of spatial domain with tristimulus signal; At last, in this playing video pattern, show that this image data is on this adjusted LCD.
The described method that is used to improve the difference of LCD image quality under different watching mode, this LCD are one can't adjust the LCD of brightness, color and contrast.
The described method that is used to improve the difference of LCD image quality under different watching mode, this spatial domain with brightness and carrier chrominance signal is the YUV territory.
The described a kind of method of LCD image quality in the following difference that is caused of different watching mode that be used to improve, this spatial domain with tristimulus signal is the RGB territory.
The described method that is used to improve the difference of LCD image quality under different watching mode, this luminance parameter value are the green gain value in the digital gain value.
The described method that is used to improve the difference of LCD image quality under different watching mode, this color parameter value are redness and the blue gain value in the digital gain value.
The described method that is used to improve the difference of LCD image quality under different watching mode, this contrast level parameter value is a gamma curve.
Description of drawings
Fig. 1 is used to improve the flow chart of LCD image quality in the method for the following difference that is caused of different watching mode for the present invention.
Embodiment
As shown in Figure 1, the invention provides a kind of method that is used to improve the difference that LCD image quality caused down in different watching mode, wherein this LCD is one can't adjust the LCD of brightness, color and contrast by hardware device.
Step of the present invention comprises: at first, with an image data, be changed to one from a transform of spatial domain with brightness and carrier chrominance signal and have the spatial domain (step S100) of tristimulus signal, wherein this image data is stored in the internal memory, and this spatial domain with brightness and carrier chrominance signal can be YUV territory (YUV domain), or is called YC
bC
rTerritory (YC
bC
rDomain), this spatial domain with tristimulus signal can be RGB territory (RGB domain).In addition, above-mentioned YC
bC
rTerritory (YC
bC
rDomain) it is as described below to be converted to the color space conversion formula in RGB territory:
R＝1.164(Y)+1.596(C
r-128)
G＝1.164(Y)-0.813(C
r-128)-0.392(C
b-128)
B＝1.164(Y)+2.017(C
b-128)
Then, have in the spatial domain of tristimulus signal at this, according to the required brightness performance of this image data, color performance and/or contrast performance, with luminance parameter value, color parameter value and/or the contrast level parameter value (step S102) of adjusting this LCD respectively, wherein this luminance parameter value is the green gain value (G gain) in the digital gain value (digital gain), this color parameter value is redness and the blue gain value (R gain and B gain) in the digital gain value, and this contrast level parameter value is gamma curve (gamma curve).
Then, this image data is changed to the spatial domain (step S104) with brightness and carrier chrominance signal from this transform of spatial domain with tristimulus signal; At last, in this playing video pattern, on this adjusted LCD, show this image data (step S106).Wherein, this step S104 is if be converted to YC with the RGB territory
bC
rThe territory is an example, and its color space conversion formula is as described below:
Y＝0.257R+0.504G+0.098B
C
b＝-0.148R-0.291G+0.439B
C
r＝0.439R-0.368G-0.071B
In sum, see that on play mode the color space of photograph is YUV (or YC usually
bC
r) form, therefore if revise the words of the color representation of photograph, then must earlier it be converted to rgb color space, and then according to required color performance adjustment digital gain value (R gain, G gain, B gain) or adjustment gamma curve (or Gamma Table), at last, (DigitalSignal Process DSP) goes back to it YUV (or YC by digital signal processor again
bC
r) form, therefore when play mode, photo color of being seen on the LCD and brightness will be seen unanimity with institute on the live preview.
Therefore, the present invention can be by the conversion and the correction in YUV territory and RGB territory, known to improve because of the difference of the different LCD images that produced in color and brightness of preview an ancient woman's ornament agate value with image capture an ancient woman's ornament agate value, the method has splendid correction effect for when the camera lens that rings image is seriously drawn at the dark angle of camera lens.Thus, it is consistent as much as possible that the present invention can make take pictures back lightness and the color seen of camera when live preview is play with image.
The above; only be the detailed description and the accompanying drawing of the specific embodiment of one of the best of the present invention; and feature of the present invention is not limited thereto; can not limit the scope of the present patent application patent protection with this; and all scopes of the present invention should be as the criterion with the scope of patent protection; be that all simple equivalent of being done according to the scope and the invention description content of the present patent application patent protection change and modify, all belong in the scope that patent of the present invention contains.
Claims (7)
1. a method that is used to improve the difference of LCD image quality under different watching mode is characterized in that, comprises the following steps:
With an image data, be changed to one from a transform of spatial domain with brightness and carrier chrominance signal and have the spatial domain of tristimulus signal;
Have in the spatial domain of tristimulus signal at this,, adjust luminance parameter value, color parameter value and/or the contrast level parameter value of this LCD respectively according to the required brightness performance of this image data, color performance and/or contrast performance;
This image data is changed to the spatial domain with brightness and carrier chrominance signal from this transform of spatial domain with tristimulus signal; And
In this playing video pattern, on this adjusted LCD, show this image data.
2. the method that is used to improve the difference of LCD image quality under different watching mode as claimed in claim 1 is characterized in that: this LCD is one can't adjust the LCD of brightness, color and contrast.
3. the method that is used to improve the otherness of LCD image quality under different watching mode as claimed in claim 1 is characterized in that: this spatial domain with brightness and carrier chrominance signal is the YUV territory.
4. the method that is used to improve the difference of LCD image quality under different watching mode as claimed in claim 1 is characterized in that: this spatial domain with tristimulus signal is the RGB territory.
5. the method that is used to improve the difference of LCD image quality under different watching mode as claimed in claim 1 is characterized in that: this luminance parameter value is the green gain value in the digital gain value.
6. the method that is used to improve the difference of LCD image quality under different watching mode as claimed in claim 1 is characterized in that: this color parameter value is redness and the blue gain value (R gain and B gain) in the digital gain value.
7. the method that is used to improve the difference of LCD image quality under different watching mode as claimed in claim 1 is characterized in that: this contrast level parameter value is a gamma curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610084437 CN101080027A (en) | 2006-05-22 | 2006-05-22 | Method for improving difference of LCD image quality under different watching mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610084437 CN101080027A (en) | 2006-05-22 | 2006-05-22 | Method for improving difference of LCD image quality under different watching mode |
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| CN101080027A true CN101080027A (en) | 2007-11-28 |
Family
ID=38907208
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| CN 200610084437 Pending CN101080027A (en) | 2006-05-22 | 2006-05-22 | Method for improving difference of LCD image quality under different watching mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752476A (en) * | 2011-11-30 | 2012-10-24 | 新奥特（北京）视频技术有限公司 | Method and device for adjusting image printing light in real time |
| CN101355634B (en) * | 2008-08-26 | 2013-06-05 | 北京中星微电子有限公司 | Method and system for regulating image chromaticity |
| CN104869242A (en) * | 2015-05-05 | 2015-08-26 | 惠州Tcl移动通信有限公司 | Method and system for adjusting screen brightness |
| CN114564132A (en) * | 2022-03-09 | 2022-05-31 | 深圳创维－Rgb电子有限公司 | Display control method and device, display equipment and storage medium |
-
2006
- 2006-05-22 CN CN 200610084437 patent/CN101080027A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101355634B (en) * | 2008-08-26 | 2013-06-05 | 北京中星微电子有限公司 | Method and system for regulating image chromaticity |
| CN102752476A (en) * | 2011-11-30 | 2012-10-24 | 新奥特（北京）视频技术有限公司 | Method and device for adjusting image printing light in real time |
| CN104869242A (en) * | 2015-05-05 | 2015-08-26 | 惠州Tcl移动通信有限公司 | Method and system for adjusting screen brightness |
| CN104869242B (en) * | 2015-05-05 | 2018-10-26 | 惠州Tcl移动通信有限公司 | Adjust the method and system of screen intensity |
| CN114564132A (en) * | 2022-03-09 | 2022-05-31 | 深圳创维－Rgb电子有限公司 | Display control method and device, display equipment and storage medium |
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