CN1905632A - Method and apparatus for automatic exposure, automatic gain control and automatic white balance of camera - Google Patents
Method and apparatus for automatic exposure, automatic gain control and automatic white balance of camera Download PDFInfo
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- CN1905632A CN1905632A CN 200610082147 CN200610082147A CN1905632A CN 1905632 A CN1905632 A CN 1905632A CN 200610082147 CN200610082147 CN 200610082147 CN 200610082147 A CN200610082147 A CN 200610082147A CN 1905632 A CN1905632 A CN 1905632A
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Abstract
This invention relates to a method and a device for regulating camera imaging quality to a better one by the collected digital image signals. The image is divided into different regions for statistics information of red, green, blue and brightness signals to adjust the brightness and color balance to obtain a favorable image.
Description
Affiliated technical field
The present invention relates to a kind of the utilization and gather the data image signal adjusting camera image quality that gets, make it to obtain the method and apparatus of the good image that adapts to environment facies, the shading value and the color balance degree of the optical environment color of image that adjusting becomes around the energy basis, the image of acquisition the best.
Background technology
The camera of general output primary signal does not have automatic control equipment, thus to different illumination and color environment can not adaptive adjusting to obtain high-quality imaging effect.Utilize each signal collected channel information to regulate the camera parameter, thereby the method that reaches good picture quality is the indispensable part in the modern camera post-processing module.
Summary of the invention
In order to overcome, reduce the negative effect of optical environment to view data, a kind of implementation method provided by the invention can be regulated the time for exposure automatically according to the variation of optical condition, gain, color balance obtains desirable image effect.
The technical solution adopted for the present invention to solve the technical problems is: by gathering the view data of statistics camera output.Come the quality of evaluate image and regulate time for exposure, image gain and the color balance of camera according to statistical information by certain algorithm.Algorithm process partly comprises: automatic exposure, gain controlling, white balance.
The invention has the beneficial effects as follows, can under various optical conditions, obtain desirable picture automatically.Effect is obvious, and algorithm is simple.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is realization flow figure of the present invention.
Fig. 2 is the block plan of algorithm of the present invention to image.
Fig. 3 is a flow chart of realizing automatic exposure.
Fig. 4 is a flow chart of realizing gain controlling.
Fig. 5 is a flow chart of realizing white balance.
Embodiment
In Fig. 1, the camera collection optical signalling also is converted to image.We add up respectively the information of the color signal (red, green, orchid, brightness) in each district according to the subregion of image among Fig. 2 at statistics.Automatic exposure part takes the circumstances into consideration to regulate exposure device according to these information and camera different classes of, reaches the purpose to the image effect coarse adjustment.Gain controlling can be regulated respectively red according to the statistical information that obtains, and is green, the gain of Lan Sanse.Reach purpose to the image fine tuning.White balance is that the image of regulating is carried out color balance.Make that image can distortion.
In Fig. 2, image is divided into 5 districts.The statistics part need be added up respectively each district.General area one and zone four are considered to the major heading image area.Zone zero, zone two and zone three are considered to the background image district.
The algorithm flow of the automatic exposure of in Fig. 3, describing.
Require to be provided with selection algorithm coefficient table and luminance factor according to daylighting.If it is very big that the statistical value of brightness and normal image are compared difference.The needs adjusting automatic exposure time make picture brighten or secretly, draw close to normal picture brightness.If the statistical value of brightness is compared with normal image, though difference is little than the value that needs coarse adjustment, compares than normal picture and to also have certain difference, that just needs the gain of change green to finely tune the brightness of picture.
The algorithm flow of the gain controlling of in Fig. 4, describing.
Adopt and same algorithm table of automatic exposure in the gain controlling.Difference as fruit green and the higher value of red and blue component is greater than a certain set point, and that will reduce the gain of green.Difference as fruit green and the average total value of red and blue component is less than a certain set point, and that will strengthen the gain of green.
The algorithm flow of the white balance of in Fig. 5, describing.
As fruit green and redness, green and blue total difference does not need to change red and blue gain in reasonable range.As fruit green and redness, total difference of green and prison look is not in reasonable range, and that will change gain red and blueness respectively according to different differences.
Claims (4)
1. method and apparatus that the image quality of camera is controlled automatically is characterized in that: by automatic exposure, automatic gain is regulated and the common adjusting of Automatic white balance is finished.
2. automatic control system according to claim 1 is characterized in that: with the image division of camera collection is 5 zones, utilizes these 5 zones to carry out automatic exposure and detects.
3. automatic control system according to claim 1 is characterized in that the image division of camera collection is 5 zones, and is red to each range statistics, green, after indigo plant and the monochrome information camera carried out automatic gain and regulates control.
4. automatic control system according to claim 1 is characterized in that: utilize redly, difference blue and green value is carried out white balance according to a threshold value and is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610082147 CN1905632A (en) | 2005-05-26 | 2006-05-24 | Method and apparatus for automatic exposure, automatic gain control and automatic white balance of camera |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520041887.5 | 2005-05-26 | ||
| CN200520041887 | 2005-05-26 | ||
| CN 200610082147 CN1905632A (en) | 2005-05-26 | 2006-05-24 | Method and apparatus for automatic exposure, automatic gain control and automatic white balance of camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1905632A true CN1905632A (en) | 2007-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200610082147 Pending CN1905632A (en) | 2005-05-26 | 2006-05-24 | Method and apparatus for automatic exposure, automatic gain control and automatic white balance of camera |
Country Status (1)
| Country | Link |
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| CN (1) | CN1905632A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227852A (en) * | 2014-06-11 | 2016-01-06 | 南京理工大学 | Based on the automatic explosion method of color weighting |
| CN107144239A (en) * | 2016-03-01 | 2017-09-08 | 杭州腾聚科技有限公司 | A kind of Gain Automatic adjusting method of handheld structure light spatial digitizer |
-
2006
- 2006-05-24 CN CN 200610082147 patent/CN1905632A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227852A (en) * | 2014-06-11 | 2016-01-06 | 南京理工大学 | Based on the automatic explosion method of color weighting |
| CN105227852B (en) * | 2014-06-11 | 2017-12-12 | 南京理工大学 | Automatic explosion method based on color weighting |
| CN107144239A (en) * | 2016-03-01 | 2017-09-08 | 杭州腾聚科技有限公司 | A kind of Gain Automatic adjusting method of handheld structure light spatial digitizer |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |