CN104501716B - Method for detecting poor adhesion position of mobile phone screen copper plate - Google Patents
Method for detecting poor adhesion position of mobile phone screen copper plate Download PDFInfo
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- CN104501716B CN104501716B CN201410766969.XA CN201410766969A CN104501716B CN 104501716 B CN104501716 B CN 104501716B CN 201410766969 A CN201410766969 A CN 201410766969A CN 104501716 B CN104501716 B CN 104501716B
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- phone screen
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Image Analysis (AREA)
Abstract
The invention provides a method for detecting a poor adhesion position of a mobile phone screen copper plate. The method comprises the following steps: determining an inherent horizontal standard line A and a longitudinal standard line B on a mobile phone screen; determining a searching region according to the position of a copper plate; acquiring a mobile phone screen image in which the copper plate is white and the background is black; searching the edge lines of the left side and the right side of the copper plate; judging whether the copper plate has winkles by comparing the inclination angle of the left side edge line and the right side edge line according to the horizontal standard line A; searching left and right corner points of the copper plate, and judging whether the copper plate is poorly adhered. The method can be used for rapidly and accurately solving the fault of poor adhesion position of the mobile phone screen copper plate.
Description
Art
The invention belongs to image procossing, it is related to a kind of mobile phone screen image detecting method.
Background technology
In the fabrication process, it is that copper sheet is pasted on mobile phone screen to have a procedure to certain brand mobile phone screen, to cover magnetic
Bar.This procedure is artificial operation, therefore the bad phenomenons such as the skew of copper sheet paste position or copper sheet fold occur.If copper
Piece pastes bad, and this mobile phone screen is waste product.Quality monitoring is carried out using the method for artificial sampling observation at present.But this method by
In the subjective factor of people occur standard differ phenomenon and also sampling observation can not accomplish that each product is detected.Therefore it is of the invention
Propose a kind of mobile phone screen copper sheet paste position automatic testing method.
The content of the invention
Can be accurate it is an object of the invention to provide one kind, rapidly carry out mobile phone screen copper sheet paste position detection side
Method.Technical scheme is as follows：
A kind of method of the bad detection of mobile phone screen copper sheet paste position, in being produced for mobile phone, comprises the following steps：
(1) intrinsic transverse reference line A, longitudinal datum line B on mobile phone screen are determined；
(2) region of search is determined according to copper sheet position；
(3) a width mobile phone screen image is gathered, in mobile phone screen image, copper sheet is white, and background is black；
(4) when copper sheet left side edge line is searched for, search for brightness trip point to the left by region of search to find copper sheet left side
Marginal point, it is Ts now to set threshold value, and copper sheet left side edge is gone out using least square fitting by the copper sheet marginal point for detecting
Linear function；Copper sheet right hand edge line is found after the same method, and obtains right side edge linear function；
(5) according to transverse reference line A, compare copper sheet left side edge line and right hand edge line angle of inclination, by angle of inclination compared with
It is small to obtain the midpoint P of the larger edge line in angle of inclination as datum line, point P to the vertical range of datum line is asked for, as
Copper sheet left side edge line and right side edge linear distance, thus Distance Judgment copper sheet whether there is fold；
(6) when copper sheet left comer point is searched for, using line and the method for the intersection point of line, left comer point and transverse reference line A are detected
Distance, judge copper sheet longitudinally whether shift；Detection left comer point and the distance of longitudinal datum line B, judge that copper sheet is laterally
It is no to shift；If two kinds of side-play amounts of skew exceed decision threshold T2, then it is assumed that copper sheet note is attached bad；Using same method
Search copper sheet right corner point, and judge whether that copper sheet occur attaches unfavorable condition；
The method can rapidly and accurately detect mobile phone screen copper sheet paste position bad error.
Brief description of the drawings
Fig. 1 copper sheet detects schematic diagrams.
Fig. 2 left hand edge lines.
Fig. 3 left hand edges line and right hand edge linear distance.
Fig. 4 left sides angle point.
Fig. 5 left side angle points and x wire A.
Specific embodiment
It is of the invention mainly to carry out copper sheet paste position inspection with the relative position of the intrinsic element of mobile phone screen by measuring copper sheet
Survey (Fig. 1 middle whites region is copper sheet).Find lower-left angle point, bottom right angle point, left hand edge line, right hand edge line and the mobile phone of copper sheet
Intrinsic transverse reference line A on screen, whether longitudinal datum line B carries out the measurement of relative distance, relative angle, and then judges copper sheet
At the qualified position of mobile phone screen.The explanation of specific steps is carried out below：
(1) line judges with line position
When the line segments such as left hand edge line, right hand edge line are found, we design one kind and look for line method.By taking left hand edge line as an example
(Fig. 2) CU is white in the picture, and background is black, therefore we select to search for brightness trip point to the left by CU to find a CU left sides
Lateral edges point, it is Ts now to set threshold value.CU left side edges are gone out using least square fitting by the CU marginal points for detecting
The function of straight line.
Compare CU left hand edges line and CU right hand edge lines angle of inclination according to transverse reference line A, angle of inclination smaller is made
On the basis of line, obtain the larger line segment midpoint P in angle of inclination, ask for point P to datum line vertical range, as CU left hand edges line and the right side
Edge line distance (Fig. 3).Thus distance may determine that whether CU fold failure occurs.
(2) point judges with line position
When CU left comer point and right corner point is searched for, using line and the method (Fig. 4) of the intersection point of line.Detection left comer point and transverse direction
Whether the Distance Judgment CU of datum line A longitudinally shifts.Detect left comer point is laterally with the Distance Judgment CU of longitudinal datum line B
It is no to shift (Fig. 5).If side-play amount exceedes decision threshold T2, then it is assumed that CU notes are attached bad.
(3) defective products is rejected, method is as follows：
Mobile phone screen sequentially passes through photoelectric sensor, industrial camera and rejects magnetic valve on a moving belt.Photoelectric sensor
It is 50cm or so with the distance between industrial camera d1, it is 400cm or so to reject the distance between magnetic valve and industrial camera d2,
Light source distance screen 1cm, camera distance screen 10m or so.
When mobile phone screen is by photoelectric sensor, photoelectric sensor sends a signal to PLC and records current time t, with t
It is starting point, for a period of time after t1, PLC notifies that camera is taken pictures and detected for time delay.With t as starting point, time delay is for a period of time after t2,
When reaching rejecting position, PLC notifies that magnetic valve rejects bad screen.Wherein, t1=d1/s, t2=d2/s, s are conveyer belt
Movement velocity.
Claims (1)
1. a kind of method of the bad detection of mobile phone screen copper sheet paste position, in being produced for mobile phone, comprises the following steps：
(1) intrinsic transverse reference line A, longitudinal datum line B on mobile phone screen are determined；
(2) region of search is determined according to copper sheet position；
(3) a width mobile phone screen image is gathered, in mobile phone screen image, copper sheet is white, and background is black；
(4) when copper sheet left side edge line is searched for, search for brightness trip point to the left by region of search to find copper sheet left side edge
Point, it is Ts now to set threshold value, and copper sheet left side edge straight line is gone out using least square fitting by the copper sheet marginal point for detecting
Function；Copper sheet right hand edge line is found after the same method, and obtains right side edge linear function；
(5) according to transverse reference line A, copper sheet left side edge line and right hand edge line angle of inclination are compared, angle of inclination is less
As datum line, the midpoint P of the larger edge line in angle of inclination is obtained, ask for point P to the vertical range of datum line, as copper sheet
Left side edge line and right side edge linear distance, thus Distance Judgment copper sheet whether there is fold；
(6) when copper sheet left comer point is searched for, using the method for line and the intersection point of line, detection left comer point and transverse reference line A away from
From, judge copper sheet longitudinally whether shift；Detection left comer point and the distance of longitudinal datum line B, judge whether copper sheet is laterally sent out
Raw skew；If two kinds of side-play amounts of skew exceed decision threshold T2, then it is assumed that copper sheet attaches bad；Searched for using same method
Copper sheet right corner point, and judge whether that copper sheet occur attaches unfavorable condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410766969.XA CN104501716B (en) | 2014-12-11 | 2014-12-11 | Method for detecting poor adhesion position of mobile phone screen copper plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410766969.XA CN104501716B (en) | 2014-12-11 | 2014-12-11 | Method for detecting poor adhesion position of mobile phone screen copper plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104501716A CN104501716A (en) | 2015-04-08 |
| CN104501716B true CN104501716B (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410766969.XA Expired - Fee Related CN104501716B (en) | 2014-12-11 | 2014-12-11 | Method for detecting poor adhesion position of mobile phone screen copper plate |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506564A (en) * | 2018-11-23 | 2019-03-22 | 苏州凯斯通机电科技有限公司 | HOOK position degree rapid detection method |
| CN111192250B (en) * | 2019-12-30 | 2022-02-08 | 合肥联宝信息技术有限公司 | Computer B-side frame detection method and device, computer storage medium and computer |
Citations (5)
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| JP2002303581A (en) * | 2001-01-15 | 2002-10-18 | Vtek:Kk | Panel inspection device and panel inspection method |
| JP2008180667A (en) * | 2007-01-26 | 2008-08-07 | Matsushita Electric Works Ltd | Method and apparatus for visually inspecting metal foil plated laminated plate |
| CN101398999A (en) * | 2007-09-28 | 2009-04-01 | 鹏智科技(深圳)有限公司 | Display equipment test device and method |
| CN101979751A (en) * | 2010-09-28 | 2011-02-23 | 中华人民共和国陕西出入境检验检疫局 | Method for detecting dimensional stability of fabric based on image analysis |
| CN103534552A (en) * | 2011-04-07 | 2014-01-22 | 日产自动车株式会社 | Wrinkle detection device and wrinkle detection method |
-
2014
- 2014-12-11 CN CN201410766969.XA patent/CN104501716B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002303581A (en) * | 2001-01-15 | 2002-10-18 | Vtek:Kk | Panel inspection device and panel inspection method |
| JP2008180667A (en) * | 2007-01-26 | 2008-08-07 | Matsushita Electric Works Ltd | Method and apparatus for visually inspecting metal foil plated laminated plate |
| CN101398999A (en) * | 2007-09-28 | 2009-04-01 | 鹏智科技(深圳)有限公司 | Display equipment test device and method |
| CN101979751A (en) * | 2010-09-28 | 2011-02-23 | 中华人民共和国陕西出入境检验检疫局 | Method for detecting dimensional stability of fabric based on image analysis |
| CN103534552A (en) * | 2011-04-07 | 2014-01-22 | 日产自动车株式会社 | Wrinkle detection device and wrinkle detection method |
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| CN104501716A (en) | 2015-04-08 |
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