CN103905762B - Method for automatically detecting projection picture for projection module - Google Patents
Method for automatically detecting projection picture for projection module Download PDFInfo
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- CN103905762B CN103905762B CN201410146507.8A CN201410146507A CN103905762B CN 103905762 B CN103905762 B CN 103905762B CN 201410146507 A CN201410146507 A CN 201410146507A CN 103905762 B CN103905762 B CN 103905762B
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- resolution chart
- chart picture
- projection module
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000007547 defect Effects 0.000 claims abstract description 6
- 238000007405 data analysis Methods 0.000 claims description 40
- 238000007689 inspection Methods 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 12
- 238000000265 homogenisation Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
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Abstract
The invention relates to a method for automatically detecting a projection picture for a projection module. The method for automatically detecting the projection picture is characterized by comprising the steps that a focusing control rod of a projection module is connected with an electric cylinder, and the focusing control rod is located at an initial position; an image resolution value is calculated; according to the change of the image resolution value, the position of the focusing control rod is controlled; finally, defect detection comprising detection of point-shaped foreign matter, detection of bar-shaped foreign matter and ghost detection is conducted. By the adoption of the method for automatically detecting the projection picture for the projection module, the precision of focusing control of a video device is improved, detection of projection defects is automatically achieved, and labor cost of the station for detection of the projection defects is reduced at the same time.
Description
Technical field
The present invention relates to a kind for the treatment of technology of the adjust automatically lens articulation based on image processing techniquess, and according to throwing
Shadow image judges whether its quality meets the requirements, it is adaptable to which the high accuracy adjustment of projection video checks application.
Background technology
At present, the focus adjustment bar on constantly regulation PICO projection modules is needed manually to come right in projection adjustment engineering
Projected image is focused, is obtained most clearly after image, then judged by the picture quality manually to focusing on, then
Different order control PICO projection modules are sent by program and is projected out different images, last resort is manually to color, ash
The quality of the pictures such as point, ghost is judged.
The content of the invention
It is an object of the invention to provide a kind of method that automatic inspection can be carried out to the projected picture of projection module.
In order to achieve the above object, the technical scheme is that and examined automatically there is provided a kind of projected picture of projection module
Checking method, it is characterised in that step is：
Step 1, the relation curve that focus adjustment bar position and projection definition are obtained by test；
Step 2, the focus adjustment bar of projection module is connected with electric cylinders, focus adjustment bar is located at initial position；
Step 3, by projection module projection obtain resolution chart picture；
Step 4, current resolution chart picture is carried out gray processing process, homogenization operation, by original resolution chart picture
It is converted into that the data analysiss image of Data Analysis Services state can be carried out, obtains the zone line of data analysiss image, calculates
Obtain the definition values of current data analysis image zone line；
Step 5, electric cylinders are further to set step-length step, and by projection module projection next width resolution chart picture is obtained；
Step 6, next width resolution chart picture is carried out gray processing process, homogenization operation, by original resolution chart picture
It is converted into that next width data analysiss image of Data Analysis Services state can be carried out, in obtaining next width data analysiss image
Between region, be calculated the definition values of next width data analysiss image zone line；
Step 7, by the definition values of next width data analysiss image zone line and current data analysis image mesozone
The definition values in domain compare, and the relation curve obtained according to step 1 sets the steering of electric cylinders so as to adjust focus adjustment bar
Position；
Step 8, return to step 3 are re-executed, until the definition values of data analysiss image zone line become from small to large
Diminish again after change；
Step 9, by electric cylinders current location adjust back a step, by projection module projection obtain resolution chart picture, to current
Resolution chart picture carries out gray processing process, homogenization operation, and original resolution chart picture is converted into carry out data analysiss
The data analysiss image of process state, obtains four angular regions of data analysiss image, and four angular regions are calculated respectively
Definition values, it is compared with the qualified threshold value of respective regions set in advance, if exceeding or falling below qualified threshold value, is returned
Step 2 is re-executed, otherwise, into step 10；
Step 10, defect inspection, including point-like inspection of foreign substance, strip inspection of foreign substance or ghost inspection：
Point-like inspection of foreign substance：Obtaining resolution chart picture to projection module projection first carries out gray processing process, then to ash
Degree image carries out angle point calculating, and calculates the gray value around angle point according to the coordinate of angle point, if angle point is compared with gray scale around
Low, there is point-like foreign body in identification, otherwise, then it is assumed that there is bright spot；
Strip inspection of foreign substance：Obtaining resolution chart picture to projection module projection carries out gray processing process, then to gray-scale maps
As carrying out rim detection, and determined whether to scratch according to the edge for detecting；
Ghost is checked：Standard definition image is divided into into different regions, each region is according to its brightness and color
The threshold value of different set R, G, B component and brightness value, during inspection, according to projection module projection each pixel in resolution chart picture is obtained
The coordinate of point finds its corresponding region, then the R of each pixel, G, B component and brightness value are carried out with the threshold value being previously set
Relatively, if the value that the same area has multiple pixels exceeds or falls below threshold value, it is determined that ghost.
Present invention contrast artificial judgment has following beneficial effect：The tune that equipment camera lens can be completed of the invention fast accurate
Jiaozhuo industry.For the theoretical value of the image sampling frame number of dynamic video image can reach 15 frames/second, step motion control precision reaches
0.2mm, meanwhile, focusing definition concordance is high, and (easily producing error due to manually comparing same width picture for a long time) exists
Follow-up machine is used as benchmark.By the present invention, the precision of video equipment focusing adjustment is improve, be automatically obtained projection and lack
Sunken inspection, while reducing the human cost of the station.
Description of the drawings
Fig. 1 is the relation curve of the adjusting lever position of the projection module used in embodiment and projection definition.
Specific embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
The invention provides a kind of projected picture automatic check method of projection module, in the present embodiment, projection module is
PICO projection modules, electric cylinders adopt SMC electric cylinders, and as 0.2mm, its step is the step-length that SMC electric cylinders set：
Step 1, the relation curve that focus adjustment bar position and projection definition are obtained by multigroup test, in the present embodiment
In the relation curve as shown in figure 1, wherein focus adjustment bar high order end is used as original position, be set as X-axis, unit is mm, clearly
Clear degree is set as Y-axis, and focus adjustment bar is moved from left to right, definition be one from obscuring to clear, then from clearly to fuzzy
Process, most clearly projected image is obtained by the movement of focus adjustment bar.
Step 2, the focus adjustment bar of projection module is connected with electric cylinders, focus adjustment bar is located at initial position.
Step 3, by projection module projection obtain resolution chart picture.
Step 4, current resolution chart picture is carried out gray processing process, homogenization operation, by original resolution chart picture
It is converted into that the data analysiss image of Data Analysis Services state can be carried out, in the present embodiment data analysiss image is carried out into 9
Region division, 9 regions include center zone line and the folding corner region positioned at four corners of image, can count respectively
Calculate the definition in all 9 regions, it is also possible to calculate the definition of zone line and four folding corner regions, it is also possible in only calculating
Between region definition；
Step 5, electric cylinders are further to set step-length step, i.e., the step-length that in the present embodiment SMC electric cylinders set as 0.2mm,
Next width resolution chart picture is obtained by projection module projection；
Step 6, employing and step 4 identical method carry out gray processing process, homogenization behaviour to next width resolution chart picture
Make, original resolution chart picture is converted into carry out next width data analysiss image of Data Analysis Services state, under
One width data analysiss image carries out 9 region divisions, and the definition in all 9 regions of next width data is calculated respectively, it is also possible to
Calculate the definition of zone line and four folding corner regions, it is also possible to only calculate the definition of zone line；
Step 7, by the middle of the definition values and current data analysis image of the zone line of next width data analysiss image
The definition values in region compare, and the relation curve obtained according to step 1 sets the steering of electric cylinders so as to adjust focus adjustment bar
Position；
Step 8, return to step 3 are re-executed, until the definition values of data analysiss image zone line become from small to large
Diminish again after change, after change from large to small occur in definition values one, the circulation of step 3 to step 8 is immediately finished, into step
Rapid 9；
Step 9, by electric cylinders current location adjust back a step, by projection module projection obtain resolution chart picture, to current
Resolution chart picture carries out gray processing process, homogenization operation, and original resolution chart picture is converted into carry out data analysiss
The data analysiss image of process state, obtains four angular regions of data analysiss image, and four angular regions are calculated respectively
Definition values, it is compared with the qualified threshold value of respective regions set in advance, if exceeding or falling below qualified threshold value, is returned
Step 2 is re-executed, otherwise, into step 10；
Step 10, defect inspection, including point-like inspection of foreign substance, strip inspection of foreign substance or ghost inspection：
Point-like inspection of foreign substance：Obtaining resolution chart picture to projection module projection first carries out gray processing process, then to ash
Degree image carries out angle point calculating, and calculates the gray value around angle point according to the coordinate of angle point, if angle point is compared with gray scale around
Low, there is point-like foreign body in identification, otherwise, then it is assumed that there is bright spot；
Strip inspection of foreign substance：Obtaining resolution chart picture to projection module projection carries out gray processing process, then to gray-scale maps
As carrying out rim detection, and determined whether to scratch according to the edge for detecting；
Ghost is checked：Standard definition image is divided into into different regions, each region is according to its brightness and color
The threshold value of different set R, G, B component and brightness value, during inspection, according to projection module projection each pixel in resolution chart picture is obtained
The coordinate of point finds its corresponding region, then the R of each pixel, G, B component and brightness value are carried out with the threshold value being previously set
Relatively, if the value that the same area has multiple pixels exceeds or falls below threshold value, it is determined that ghost.
Claims (1)
1. the projected picture automatic check method of a kind of projection module, it is characterised in that step is：
Step 1, the relation curve that focus adjustment bar position and projection definition are obtained by test；
Step 2, the focus adjustment bar of projection module is connected with electric cylinders, focus adjustment bar is located at initial position；
Step 3, by projection module projection obtain resolution chart picture；
Step 4, gray processing process, homogenization operation are carried out to current resolution chart picture, current resolution chart picture is changed
Into the data analysiss image that can carry out Data Analysis Services state, the zone line of data analysiss image is obtained, be calculated
The definition values of current data analysis image zone line；
Step 5, electric cylinders are further to set step-length step, and by projection module projection next width resolution chart picture is obtained；
Step 6, next width resolution chart picture is carried out gray processing process, homogenization operation, by next width resolution chart picture conversion
Into the next width data analysiss image that can carry out Data Analysis Services state, the mesozone of next width data analysiss image is obtained
Domain, is calculated the definition values of next width data analysiss image zone line；
Step 7, by the definition values of next width data analysiss image zone line and current data analysis image zone line
Definition values compare, and the relation curve obtained according to step 1 sets the steering of electric cylinders so as to adjust the position of focus adjustment bar；
Step 8, return to step 3 are re-executed, after the definition values of data analysiss image zone line change from small to large
Diminish again；
Step 9, electric cylinders are adjusted back into a step in current location, resolution chart picture is obtained by projection module projection, to current clear
Degree image carries out gray processing process, homogenization operation, and original resolution chart picture is converted into carry out Data Analysis Services
The data analysiss image of state, obtains four angular regions of data analysiss image, and respectively four angular regions of calculating is clear
Angle value, it is compared with the qualified threshold value of respective regions set in advance, if exceeding or falling below qualified threshold value, return to step
2 re-execute, otherwise, into step 10；
Step 10, defect inspection, including point-like inspection of foreign substance, strip inspection of foreign substance or ghost inspection：
Point-like inspection of foreign substance：Obtaining resolution chart picture to projection module projection first carries out gray processing process, then to gray-scale maps
As carrying out angle point calculating, and the gray value around angle point is calculated according to the coordinate of angle point, if angle point is low compared with gray scale around
There is point-like foreign body in identification, otherwise, then it is assumed that there is bright spot；
Strip inspection of foreign substance：Obtaining resolution chart picture to projection module projection carries out gray processing process, and then gray level image is entered
Row rim detection, and determined whether to scratch according to the edge for detecting；
Ghost is checked：Standard definition image is divided into into different regions, each region is according to its brightness and the difference of color
The threshold value of setting R, G, B component and brightness value, during inspection, according to projection module projection resolution chart each pixel as in is obtained
Coordinate finds its corresponding region, then the R of each pixel, G, B component and brightness value are compared with the threshold value being previously set,
If the value that the same area has multiple pixels exceeds or falls below threshold value, it is determined that ghost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410146507.8A CN103905762B (en) | 2014-04-14 | 2014-04-14 | Method for automatically detecting projection picture for projection module |
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| CN201410146507.8A CN103905762B (en) | 2014-04-14 | 2014-04-14 | Method for automatically detecting projection picture for projection module |
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| CN103905762B true CN103905762B (en) | 2017-04-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107942474A (en) * | 2017-12-11 | 2018-04-20 | 成都市极米科技有限公司 | Focusing method, device and projector equipment |
| CN114466173A (en) * | 2021-11-16 | 2022-05-10 | 海信视像科技股份有限公司 | Projection equipment and projection display control method for automatically throwing screen area |
| CN114785959B (en) * | 2022-06-16 | 2022-10-14 | 江苏美克医学技术有限公司 | Automatic focusing method and device for fluorescence microscope, storage medium and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065341A (en) * | 1991-02-19 | 1992-10-14 | 利诺泰普-赫尔有限公司 | The focus adjustment method of optical image system and device |
| CN102375316A (en) * | 2010-08-27 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Projector and automatic focusing method thereof |
| CN102749183A (en) * | 2012-05-25 | 2012-10-24 | 苏州佳世达光电有限公司 | System, method and device for detecting projection picture of projector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7517089B2 (en) * | 2004-03-29 | 2009-04-14 | Seiko Epson Corporation | Image processing system, projector, information storage medium, and image processing method |
| JP3888465B2 (en) * | 2004-05-26 | 2007-03-07 | セイコーエプソン株式会社 | Image processing system, projector, and image processing method |
| JP2012027263A (en) * | 2010-07-23 | 2012-02-09 | Sony Corp | Imaging apparatus, control method and program thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065341A (en) * | 1991-02-19 | 1992-10-14 | 利诺泰普-赫尔有限公司 | The focus adjustment method of optical image system and device |
| CN102375316A (en) * | 2010-08-27 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Projector and automatic focusing method thereof |
| CN102749183A (en) * | 2012-05-25 | 2012-10-24 | 苏州佳世达光电有限公司 | System, method and device for detecting projection picture of projector |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhao Tianjun Inventor after: Zhu Yajun Inventor after: Zhu Yamin Inventor before: Zhu Yajun Inventor before: Wang Zhiwei Inventor before: Ye Jiaqian |
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Free format text: CORRECT: INVENTOR; FROM: ZHU YAJUN WANG ZHIWEI YE JIAQIAN TO: ZHAO TIANJUN ZHU YAJUN ZHU YAMIN |
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Effective date of registration: 20210115 Address after: 201201 No. 3777, Chuansha Road, Shanghai, Pudong New Area Patentee after: SHANGHAI SUOGUANG VISUAL PRODUCTS Co.,Ltd. Address before: 200240 Shanghai city Minhang District Jianchuan Road No. 930 Patentee before: SHANGHAI SUOGUANG ELECTRONIC Co.,Ltd. |
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Granted publication date: 20170419 |