CN102387323A - Correction method of image sensor - Google Patents
Correction method of image sensor Download PDFInfo
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- CN102387323A CN102387323A CN201110337090XA CN201110337090A CN102387323A CN 102387323 A CN102387323 A CN 102387323A CN 201110337090X A CN201110337090X A CN 201110337090XA CN 201110337090 A CN201110337090 A CN 201110337090A CN 102387323 A CN102387323 A CN 102387323A
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Abstract
The invention discloses a correction method of an image sensor, which comprises the following steps: firstly, the image sensor is assembled in a camera lens and shoots an image shift test chart to obtain an imaging picture; secondly, according to comparison of four vertex angles of the imaging picture with four focusing points of the image shift test chart, imaging has no shift, original settings are retained, the correction is finished, and if the imaging has shift, the following steps are continued to perform the correction; thirdly, a minimum scope which can cover the four focusing points is found through the zoom function of the camera lens; fourthly, an image scope formed by connecting the four focusing points is intercepted within the minimum scope to obtain a screenshot scope; fifthly, pixel compensation is performed on a losing image scope of the screenshot scope; and sixthly, the redefined zoom focal length and the corresponding screenshot scope are recorded, and the correction is finished. The correction method of the image sensor solves the problem of imaging scope shift, deficiency and the like and is low in cost and high in production efficiency.
Description
Technical field
The present invention relates to electronic applications, relate in particular to and a kind ofly be used to overcome image sensor and cause imaging scope and focusing correction for drift method because of surface encapsulation is bad.
Background technology
Image sensor (image sensor) in digital photography, the shooting electron-like commodity; It is bad and cause problems such as element PIN pin skew solder joint center or high low dip that piece usually can appear in surface encapsulation (SMT) production line; These problems can exert an influence to image sensors such as CCD and COMS acquisition image document; Especially to having the product influence of camera lens enlarging function; Image sensor causes image shift on uneven circuit board, further cause camera lens to amplify the back imaging when using full length shot and dark angle occurs, the image data disappearance occurs.Had a lot of methods to be suggested at present and improved this problem, but loaded down with trivial details or need special package to fix to cause cost to increase owing to process, effect is also not obvious.
Summary of the invention
In view of the defective that above-mentioned prior art exists, the objective of the invention is to propose a kind of bad and intelligentized bearing calibration of causing imaging scope and focusing to squint of image sensor surface encapsulation that is used to overcome.
The object of the invention will be achieved through following technical scheme:
A kind of bearing calibration of image sensor comprises the steps:
Step 1: said image sensor is connected with camera lens, is assembled in the electronic equipment,, obtain image in fixed point photographic images skew resolution chart;
Step 2: compare according to four drift angles of image and 4 focusings in the said image shift resolution chart, imaging does not have skew, keeps original setting, accomplishes correction; The imaging skew continues following steps and proofreaies and correct;
Step 3: the zoom function through camera lens finds the minimum zone of containing said 4 focusings;
Step 4: in the said minimum zone of step 3, the image range that 4 focusing lines of intercepting constitute obtains the sectional drawing scope;
Step 5: the image range that said sectional drawing scope is lost is made pixel compensation;
Step 6: record is the zoom focal length and corresponding sectional drawing scope of definition again, accomplishes and proofreaies and correct.
Preferably, the bearing calibration of above-mentioned a kind of image sensor, wherein: said pixel compensation adopts instant not good enough compensation way.
Preferably, the bearing calibration of above-mentioned a kind of image sensor, wherein: said electronic equipment comprises camera, video camera and camera.
Outstanding effect of the present invention is: utilize software and camera lens contractile function, define imaging region again, improved and caused problems such as the skew of imaging scope, disappearance because of the image sensor surface encapsulation is bad; Simple to operate; Cost is low, is applicable to production line production, and production efficiency is high.
Following constipation closes the embodiment accompanying drawing, and specific embodiments of the invention is done further to detail, so that technical scheme of the present invention is easier to understand, grasp.
Description of drawings
Fig. 1 is the flow chart of the embodiment of the invention 1;
Fig. 2 is the image offset sketch map of the embodiment of the invention 1;
Fig. 3 is the lens zoom sketch map of the embodiment of the invention 1.
Embodiment
Embodiment 1:
The bearing calibration of a kind of image sensor of present embodiment, as shown in Figure 1, comprise the steps:
Step 1: said image sensor is connected with camera lens, is assembled in the electronic equipment (camera, video camera, shooting are first-class),, obtain image in fixed point photographic images skew resolution chart;
Step 2: compare according to four drift angles of image and 4 focusings in the said image shift resolution chart, imaging does not have skew, keeps original setting, accomplishes correction; The imaging skew continues following steps and proofreaies and correct;
Step 3: the zoom function through camera lens finds the minimum zone of containing said 4 focusings;
Step 4: in the said minimum zone of step 3, the image range that 4 focusing lines of intercepting constitute obtains the sectional drawing scope;
Step 5: the image range that said sectional drawing scope is lost adopts instant not good enough compensation way to make pixel compensation;
Step 6: record is the zoom focal length and corresponding sectional drawing scope of definition again, accomplishes and proofreaies and correct.
Like Fig. 2 ~ shown in Figure 3; Because image sensor is the picture that passive reception camera lens is appeared, so the transducer of skew can occur the difference on the imaging content to the image 2 of camera lens fixed point photographic images skew resolution chart 1 gained compared to correct image 3; Comprise imagery zone disappearance part 4 and the influenced part 5 of image quality; At this moment, whether all in camera lens, be used as adjusting the foundation of camera lens minimum zone, the imagery zone of disappearance is encompassed in the minimum zone 7 through 4 focusings 6 of monitoring image shift resolution chart; The zone of 4 focusing line formations is correct images 3, also is needed sectional drawing scope 8; In addition; On optical center focusing 9 is taken back in offset sensor image 2; And the sectional drawing scope 8 inner lens center-spot points 9 behind the sectional drawing are to be positioned at correct center again, and this also explains the sectional drawing scope 8 correct image 3 under the transducer non-migration situation just, and is last; The image pixel that sectional drawing lost is redefined through instant not good enough compensation way, make pixel identical with ideal image.
Present embodiment utilizes software and camera lens contractile function, defines imaging region again, has improved because of the image sensor surface encapsulation is bad and has caused problems such as the skew of imaging scope, disappearance, and simple to operate, cost is low, is applicable to production line production, and production efficiency is high.
The present invention still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming all drop within protection scope of the present invention.
Claims (3)
1. the bearing calibration of an image sensor is characterized in that comprising the steps:
Step 1: said image sensor is connected with camera lens, is assembled in the electronic equipment,, obtain image in fixed point photographic images skew resolution chart;
Step 2: compare according to four drift angles of image and 4 focusings in the said image shift resolution chart, imaging does not have skew, keeps original setting, accomplishes correction; The imaging skew continues following steps and proofreaies and correct;
Step 3: the zoom function through camera lens finds the minimum zone of containing said 4 focusings;
Step 4: in the said minimum zone of step 3, the image range that 4 focusing lines of intercepting constitute obtains the sectional drawing scope;
Step 5: the image range that said sectional drawing scope is lost is made pixel compensation;
Step 6: record is the zoom focal length and corresponding sectional drawing scope of definition again, accomplishes and proofreaies and correct.
2. the bearing calibration of a kind of image sensor according to claim 1 is characterized in that: said pixel compensation adopts instant not good enough compensation way.
3. the bearing calibration of a kind of image sensor according to claim 1 is characterized in that: said electronic equipment comprises camera, video camera and camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110337090XA CN102387323A (en) | 2011-10-31 | 2011-10-31 | Correction method of image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110337090XA CN102387323A (en) | 2011-10-31 | 2011-10-31 | Correction method of image sensor |
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| CN102387323A true CN102387323A (en) | 2012-03-21 |
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| CN201110337090XA Pending CN102387323A (en) | 2011-10-31 | 2011-10-31 | Correction method of image sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279958A (en) * | 2014-10-24 | 2015-01-14 | 西安诺瓦电子科技有限公司 | LED display device space position detection method and system for guidance and correction |
| CN106791817A (en) * | 2016-12-27 | 2017-05-31 | 歌尔股份有限公司 | The assemble method of camera lens to be assembled and image sensor |
| CN110858872A (en) * | 2018-08-23 | 2020-03-03 | 浙江宇视科技有限公司 | Optical axis offset compensation method and device |
| CN112118370A (en) * | 2019-06-20 | 2020-12-22 | 浙江宇视科技有限公司 | Dark corner defect eliminating method, device, equipment and storage medium |
-
2011
- 2011-10-31 CN CN201110337090XA patent/CN102387323A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279958A (en) * | 2014-10-24 | 2015-01-14 | 西安诺瓦电子科技有限公司 | LED display device space position detection method and system for guidance and correction |
| CN106791817A (en) * | 2016-12-27 | 2017-05-31 | 歌尔股份有限公司 | The assemble method of camera lens to be assembled and image sensor |
| CN110858872A (en) * | 2018-08-23 | 2020-03-03 | 浙江宇视科技有限公司 | Optical axis offset compensation method and device |
| CN112118370A (en) * | 2019-06-20 | 2020-12-22 | 浙江宇视科技有限公司 | Dark corner defect eliminating method, device, equipment and storage medium |
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Application publication date: 20120321 |