CN103905762A - Method for automatically detecting projection picture for projection module - Google Patents

Method for automatically detecting projection picture for projection module Download PDF

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Publication number
CN103905762A
CN103905762A CN201410146507.8A CN201410146507A CN103905762A CN 103905762 A CN103905762 A CN 103905762A CN 201410146507 A CN201410146507 A CN 201410146507A CN 103905762 A CN103905762 A CN 103905762A
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China
Prior art keywords
data analysis
projection
resolution chart
projection module
analysis image
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CN201410146507.8A
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Chinese (zh)
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CN103905762B (en
Inventor
朱亚军
王智玮
叶佳倩
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上海索广电子有限公司
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Publication of CN103905762A publication Critical patent/CN103905762A/en
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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

The projected picture automatic check method of projection module

Technical field

The present invention relates to a kind for the treatment of technology of the automatic adjustment camera lens definition based on image processing techniques, and judge according to projected image whether its quality meets the requirements, the high accuracy adjustment that is applicable to projection video checks application.

Background technology

At present, adjust the focus adjustment bar that needs manually constantly to regulate in engineering on PICO projection module to projected image is focused in projection, obtain the most clearly after image, rely on manually the picture quality focusing on is judged again, then send different order control PICO projection module projections by program and go out different images, last resort is manually to color, grey point, and the quality of the pictures such as ghost judges.

Summary of the invention

The object of this invention is to provide a kind of method that can carry out to the projected picture of projection module automatic inspection.

In order to achieve the above object, technical scheme of the present invention has been to provide a kind of projected picture automatic check method of projection module, it is characterized in that, step is:

Step 1, obtain the relation curve of focus adjustment bar position and projection definition by test;

Step 2, the focus adjustment bar of projection module is connected with electric cylinder, focus adjustment bar is positioned at initial position;

Step 3, obtain resolution chart picture by projection module projection;

Step 4, current resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to the data analysis image that can carry out data analysis treatment state, obtain the zone line of data analysis image, calculate the definition values of current data analysis image zone line;

Step 5, electric cylinder, to set step-length step further, obtain next width resolution chart picture by projection module projection;

Step 6, next width resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to next width data analysis image that can carry out data analysis treatment state, obtain the zone line of next width data analysis image, calculate the definition values of next width data analysis image zone line;

Step 7, the definition values of next width data analysis image zone line is compared with the definition values of current data analysis image zone line, thereby the relation curve obtaining according to step 1 is set the position of adjusting focus adjustment bar that turns to of electric cylinder;

Step 8, return to step 3 and re-execute, until the definition values of data analysis image zone line diminishes again after changing from small to large;

Step 9, electric cylinder is adjusted back to a step in current location, obtain resolution chart picture by projection module projection, current resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to the data analysis image that can carry out data analysis treatment state, obtain four angular regions of data analysis image, calculate respectively the definition values of four angular regions, by the qualified threshold of itself and predefined respective regions, if exceed or lower than qualified threshold value, returning to step 2 re-executes, otherwise, enter step 10;

Step 10, defect inspection, comprise point-like inspection of foreign substance, strip inspection of foreign substance or ghost inspection:

Point-like inspection of foreign substance: first projection obtains resolution chart and looks like to carry out gray processing processing to projection module, then gray level image is carried out to angle point calculating, and calculate angle point gray value around according to the coordinate of angle point, if angle point, compared with around gray scale is low, is assert and is had point-like foreign matter, otherwise, think and have bright spot;

Strip inspection of foreign substance: projection obtains resolution chart and looks like to carry out gray processing processing to projection module, then gray level image is carried out to rim detection, and determine whether to scratch according to the edge detecting;

Ghost checks: single-definition image is divided into different regions, each region is according to the threshold value of the different set R of its brightness and color, G, B component and brightness value, when inspection, the coordinate that projection obtains each pixel in resolution chart picture according to projection module finds its corresponding region, again the threshold value of the R of each pixel, G, B component and brightness value and setting is in advance compared, if the same area exists the value of multiple pixels to exceed or lower than threshold value, is judged to be to exist ghost.

The present invention contrasts artificial judgment following beneficial effect: the focusing operation of energy fast accurate of the present invention ground finishing equipment camera lens.Theoretical value for the image sampling frame number of dynamic video image can reach for 15 frame/seconds, stepping control precision reaches 0.2mm, meanwhile, focusing definition consistency is high, and (due to manually for a long time more same width picture easily produce error) using as benchmark at follow-up machine.By the present invention, improve the precision that video equipment focusing is adjusted, automatically realize the inspection of projecting flaws, cut down the human cost of this station simultaneously.

Accompanying drawing explanation

Fig. 1 is the adjusting lever position of projection module and the relation curve of projection definition using in embodiment.

Embodiment

For the present invention is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing 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 module, and electric cylinder adopts SMC electricity cylinder, and the step-length that SMC electricity cylinder is set is 0.2mm, the steps include:

Step 1, obtain the relation curve of focus adjustment bar position and projection definition by many groups of tests, this relation curve as shown in Figure 1 in the present embodiment, wherein focus adjustment bar high order end is as original position, be set as X-axis, unit is mm, and definition is set as Y-axis, focus adjustment bar moves from left to right, definition be one from fuzzy to clear, then process from clear to fuzzy, obtains projected image the most clearly by the movement of focus adjustment bar.

Step 2, the focus adjustment bar of projection module is connected with electric cylinder, focus adjustment bar is positioned at initial position.

Step 3, obtain resolution chart picture by projection module projection.

Step 4, current resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to the data analysis image that can carry out data analysis treatment state, in the present embodiment data analysis image is carried out to 9 region divisions, 9 regions comprise center zone line and are positioned at the folding corner region in four bights of image, can calculate respectively the definition in all 9 regions, also can calculate the definition of zone line and four folding corner regions, also can only calculate the definition of zone line;

Step 5, electric cylinder are to set step-length step further, and the step-length that SMC electricity cylinder is set is in the present embodiment 0.2mm, obtains next width resolution chart picture by projection module projection;

Step 6, the employing method identical with step 4 look like to carry out gray processing processing, homogenization operation to next width resolution chart, original resolution chart is looked like to convert to next width data analysis image that can carry out data analysis treatment state, next width data analysis image is carried out to 9 region divisions, calculate respectively the definition in all 9 regions of next width data, also can calculate the definition of zone line and four folding corner regions, also can only calculate the definition of zone line;

Step 7, the definition values of the zone line of next width data analysis image is compared with the definition values of current data analysis image zone line, thereby the relation curve obtaining according to step 1 is set the position of adjusting focus adjustment bar that turns to of electric cylinder;

Step 8, return to step 3 and re-execute, until the definition values of data analysis image zone line diminishes again after changing from small to large, when definition values one occurs that, after variation from large to small, end step 3, to the circulation of step 8, enters step 9 immediately;

Step 9, electric cylinder is adjusted back to a step in current location, obtain resolution chart picture by projection module projection, current resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to the data analysis image that can carry out data analysis treatment state, obtain four angular regions of data analysis image, calculate respectively the definition values of four angular regions, by the qualified threshold of itself and predefined respective regions, if exceed or lower than qualified threshold value, returning to step 2 re-executes, otherwise, enter step 10;

Step 10, defect inspection, comprise point-like inspection of foreign substance, strip inspection of foreign substance or ghost inspection:

Point-like inspection of foreign substance: first projection obtains resolution chart and looks like to carry out gray processing processing to projection module, then gray level image is carried out to angle point calculating, and calculate angle point gray value around according to the coordinate of angle point, if angle point, compared with around gray scale is low, is assert and is had point-like foreign matter, otherwise, think and have bright spot;

Strip inspection of foreign substance: projection obtains resolution chart and looks like to carry out gray processing processing to projection module, then gray level image is carried out to rim detection, and determine whether to scratch according to the edge detecting;

Ghost checks: single-definition image is divided into different regions, each region is according to the threshold value of the different set R of its brightness and color, G, B component and brightness value, when inspection, the coordinate that projection obtains each pixel in resolution chart picture according to projection module finds its corresponding region, again the threshold value of the R of each pixel, G, B component and brightness value and setting is in advance compared, if the same area exists the value of multiple pixels to exceed or lower than threshold value, is judged to be to exist ghost.

Claims (1)

1. a projected picture automatic check method for projection module, is characterized in that, step is:
Step 1, obtain the relation curve of focus adjustment bar position and projection definition by test;
Step 2, the focus adjustment bar of projection module is connected with electric cylinder, focus adjustment bar is positioned at initial position;
Step 3, obtain resolution chart picture by projection module projection;
Step 4, current resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to the data analysis image that can carry out data analysis treatment state, obtain the zone line of data analysis image, calculate the definition values of current data analysis image zone line;
Step 5, electric cylinder, to set step-length step further, obtain next width resolution chart picture by projection module projection;
Step 6, next width resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to next width data analysis image that can carry out data analysis treatment state, obtain the zone line of next width data analysis image, calculate the definition values of next width data analysis image zone line;
Step 7, the definition values of next width data analysis image zone line is compared with the definition values of current data analysis image zone line, thereby the relation curve obtaining according to step 1 is set the position of adjusting focus adjustment bar that turns to of electric cylinder;
Step 8, return to step 3 and re-execute, until the definition values of data analysis image zone line diminishes again after changing from small to large;
Step 9, electric cylinder is adjusted back to a step in current location, obtain resolution chart picture by projection module projection, current resolution chart is looked like to carry out gray processing processing, homogenization operation, original resolution chart is looked like to convert to the data analysis image that can carry out data analysis treatment state, obtain four angular regions of data analysis image, calculate respectively the definition values of four angular regions, by the qualified threshold of itself and predefined respective regions, if exceed or lower than qualified threshold value, returning to step 2 re-executes, otherwise, enter step 10;
Step 10, defect inspection, comprise point-like inspection of foreign substance, strip inspection of foreign substance or ghost inspection:
Point-like inspection of foreign substance: first projection obtains resolution chart and looks like to carry out gray processing processing to projection module, then gray level image is carried out to angle point calculating, and calculate angle point gray value around according to the coordinate of angle point, if angle point, compared with around gray scale is low, is assert and is had point-like foreign matter, otherwise, think and have bright spot;
Strip inspection of foreign substance: projection obtains resolution chart and looks like to carry out gray processing processing to projection module, then gray level image is carried out to rim detection, and determine whether to scratch according to the edge detecting;
Ghost checks: single-definition image is divided into different regions, each region is according to the threshold value of the different set R of its brightness and color, G, B component and brightness value, when inspection, the coordinate that projection obtains each pixel in resolution chart picture according to projection module finds its corresponding region, again the threshold value of the R of each pixel, G, B component and brightness value and setting is in advance compared, if the same area exists the value of multiple pixels to exceed or lower than threshold value, is judged to be to exist ghost.
CN201410146507.8A 2014-04-14 2014-04-14 Method for automatically detecting projection picture for projection module CN103905762B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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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
US20050213821A1 (en) * 2004-03-29 2005-09-29 Seiko Epson Corporation Image processing system, projector, program, information storage medium, and image processing method
US20050265713A1 (en) * 2004-05-26 2005-12-01 Seiko Epson Corporation Image processing system, projector, program, information storage medium, and image processing method
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
US20120154547A1 (en) * 2010-07-23 2012-06-21 Hidekuni Aizawa Imaging device, control method thereof, and program
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
US20050213821A1 (en) * 2004-03-29 2005-09-29 Seiko Epson Corporation Image processing system, projector, program, information storage medium, and image processing method
US20050265713A1 (en) * 2004-05-26 2005-12-01 Seiko Epson Corporation Image processing system, projector, program, information storage medium, and image processing method
US20120154547A1 (en) * 2010-07-23 2012-06-21 Hidekuni Aizawa Imaging device, control method thereof, and program
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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Inventor after: Zhao Tianjun

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Inventor after: Zhu Yamin

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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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