CN104438125B - Mobile phone screen defective product removing method - Google Patents
Mobile phone screen defective product removing method Download PDFInfo
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- CN104438125B CN104438125B CN201410763766.5A CN201410763766A CN104438125B CN 104438125 B CN104438125 B CN 104438125B CN 201410763766 A CN201410763766 A CN 201410763766A CN 104438125 B CN104438125 B CN 104438125B
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- copper sheet
- line
- mobile phone
- phone screen
- point
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention provides a mobile phone screen defective product removing method. The mobile phone screen defective product removing method comprises the following steps of determining an intrinsic horizontal reference line A and an intrinsic longitudinal reference line B on a mobile phone screen; determining a research region according to the position of a copper plate; collecting a mobile phone screen image, wherein in the mobile phone screen image, the copper plate is white, and the background is black; researching edge lines of the left side and the right side of the copper plate; comparing the inclination angles of the left side edge line and the right side edge line of the copper plate according to the horizontal reference line A, and judging whether the copper plate has folds from a distance; searching left and right angular points of the copper plate, and judging whether the poor pasting phenomenon of the copper plate occurs or not; and alarming and removing an unqualified pasted copper plate. The method can be used for rapidly and accurately detecting the poor pasting position fault of the mobile phone screen copper plate, and removing defective products.
Description
Art
The invention belongs to image procossing, it is related to a kind of mobile phone screen image detecting method.
Background technology
Certain brand mobile phone screen in the fabrication process, has one procedure to be stickup copper sheet on mobile phone screen, to cover magnetic
Bar.This procedure is artificial operation, and the bad phenomenon such as copper sheet paste position skew or copper sheet fold therefore occurs.If copper
Piece stickup is bad, and this mobile phone screen is waste product.At present quality monitoring is carried out using the method for artificial sampling observation.But this method by
Subjective factorss in people occur that standard differs phenomenon and inspects by random samples and can not accomplish that each product is detected.The therefore present invention
A kind of mobile phone screen copper sheet paste position automatic testing method is proposed.
Content of the invention
It is an object of the invention to provide one kind can be accurate, rapidly carry out the inspection of certain brand mobile phone screen copper sheet paste position
Survey method, and then defective products is rejected.Technical scheme is as follows:
A kind of mobile phone screen defective products elimination method, in producing 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) gather a width mobile phone screen image, in mobile phone screen image, copper sheet is white, and background is black；
(4) when searching for copper sheet left side edge line, search for brightness trip point to the left to find on the left of copper sheet by region of search
Marginal point, now setting threshold value is ts, goes out copper sheet left side edge by the copper sheet marginal point detecting using least square fitting
Linear function；Find copper sheet right hand edge line after the same method, and obtain 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, by angle of inclination relatively
Little obtain the midpoint p of the larger edge line in angle of inclination as datum line, ask for point p to the vertical dimension of datum line, as
Whether copper sheet left side edge line and right side edge linear distance, fold by this Distance Judgment copper sheet；
(6) when searching for copper sheet left comer point, using the method for line and the intersection point of line, left comer point and transverse reference line a are detected
Distance, judge whether copper sheet longitudinally shifts；Detection left comer point and the distance of longitudinal datum line b, judge that copper sheet is laterally
No shift；If the side-play amount of two kinds of skews exceedes 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 attaches unfavorable condition；
(7) testing result according to (5) and (6), judges whether that copper sheet pastes underproof phenomenon, if existing,
Give to report to the police and reject.
The method can rapidly and accurately detect mobile phone screen copper sheet paste position bad error, and defective products is picked
Remove.
Brief description
Fig. 1 copper sheet detects schematic diagram.
Fig. 2 left hand edge line.
Fig. 3 left hand edge line and right hand edge linear distance.
Angle point on the left of Fig. 4.
Angle point and x wire a on the left of Fig. 5.
Specific embodiment
The present invention mainly carries out copper sheet paste position inspection by measuring copper sheet with the relative position of the intrinsic element of mobile phone screen
Survey (Fig. 1 middle white 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, longitudinal datum line b carries out the measurement of relative distance, relative angle, and then whether judges copper sheet
At the qualified position of mobile phone screen.Carry out the explanation of concrete steps below:
(1) line and line position judge
When finding the line segments such as left hand edge line, right hand edge line, we design one kind and look for line method.Taking left hand edge line as a example
(Fig. 2) cu is white in the picture, and background is black, and therefore we select to search for brightness trip point to the left to find a cu left side by cu
Lateral edges point, now setting threshold value is ts.Cu left side edge is gone out using least square fitting by the cu marginal point detecting
The function of straight line.
Compare cu left hand edge line and cu right hand edge line angle of inclination according to transverse reference line a, angle of inclination smaller is made
On the basis of line, obtain angle of inclination larger line segment midpoint p, ask for point p to datum line vertical dimension, as cu left hand edge line and the right side
Edge line distance (Fig. 3).Thus distance may determine that whether cu fold fault.
(2) point and line position judge
When searching for cu left comer point and right corner point, using the method (Fig. 4) of line and the intersection point of line.Detection left comer point with laterally
Whether the Distance Judgment cu of datum line a longitudinally shifts.Detect that left comer point with the Distance Judgment cu of longitudinal datum line b is laterally
No shift (Fig. 5).If side-play amount exceedes decision threshold t2 then it is assumed that cu note is attached bad.
(3) defective products is rejected, method is as follows:
Mobile phone screen sequentially passes through photoelectric sensor, industrial camera on a moving belt and rejects electromagnetic valve.Photoelectric sensor
It is 50cm with the distance between industrial camera d1, rejecting electromagnetic valve and the distance between industrial camera d2 is 400cm,
Light source distance screen 1cm, camera distance screen 10m about.
When certain brand mobile phone screen is through photoelectric sensor, when photoelectric sensor sends a signal to plc and records current
Between t, with t as starting point, time delay is for a period of time after t1, and plc notifies camera to take pictures and detected.With t as starting point, during one section of time delay
Between after t2, reach when rejecting position, plc notifies electromagnetic valve to reject bad screen.Wherein, t1=d1/s, t2=d2/s, s are
The movement velocity of conveyer belt.
Claims (1)
1. a kind of mobile phone screen defective products elimination method, in producing 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) gather a width mobile phone screen image, in mobile phone screen image, copper sheet is white, and background is black；
(4) when searching for copper sheet left side edge line, search for brightness trip point to the left to find copper sheet left side edge by region of search
Point, now setting threshold value is ts, goes out copper sheet left side edge straight line by the copper sheet marginal point detecting using least square fitting
Function；Find copper sheet right hand edge line after the same method, and obtain 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, obtain the midpoint p of the larger edge line in angle of inclination, ask for point p to the vertical dimension of datum line, as copper sheet
Whether left side edge line and right side edge linear distance, fold by this Distance Judgment copper sheet；
(6) when searching for copper sheet left comer point, using the method for line and the intersection point of line, detect left comer point and transverse reference line a away from
From judging whether copper sheet longitudinally shifts；Detection left comer point and the distance of longitudinal datum line b, judge whether copper sheet is laterally sent out
Raw skew；If the side-play amount of two kinds of skews exceedes decision threshold t2 then it is assumed that copper sheet attaching is bad；Using same method search
Copper sheet right corner point, and judge whether that copper sheet attaches unfavorable condition；
(7) testing result according to (5) and (6), judging whether that copper sheet attaches underproof phenomenon, if existing, giving
Report to the police and reject.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763766.5A CN104438125B (en) | 2014-12-11 | 2014-12-11 | Mobile phone screen defective product removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763766.5A CN104438125B (en) | 2014-12-11 | 2014-12-11 | Mobile phone screen defective product removing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104438125A CN104438125A (en) | 2015-03-25 |
| CN104438125B true CN104438125B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410763766.5A Expired - Fee Related CN104438125B (en) | 2014-12-11 | 2014-12-11 | Mobile phone screen defective product removing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN104438125B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113976452B (en) * | 2021-07-30 | 2024-07-12 | 广东省威汇智能科技有限公司 | Failure detection method and device based on flexible flat cable |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351039C (en) * | 2004-04-08 | 2007-11-28 | 电子科技大学 | Precisive measurement of static knife profile |
| US20100222917A1 (en) * | 2008-09-25 | 2010-09-02 | Bohlig James W | System and Method for Tagging Products for Use in Identification of the Components Therein |
| KR101032446B1 (en) * | 2009-11-26 | 2011-05-03 | 광주과학기술원 | Apparatus and method for detecting a vertex on the screen of a mobile terminal |
| CN101936708B (en) * | 2010-08-13 | 2012-05-23 | 河海大学常州校区 | Method for positioning and detecting QFP (Quad Flat Package) chip |
| CN102305793A (en) * | 2011-05-11 | 2012-01-04 | 苏州天准精密技术有限公司 | Method and equipment for detecting appearance quality of product |
| CN102708368B (en) * | 2012-05-04 | 2014-01-15 | 湖南大学 | Method for positioning bottle bodies on production line based on machine vision |
| CN103295420B (en) * | 2013-01-30 | 2015-12-02 | 吉林大学 | A kind of method of Lane detection |
| CN203750867U (en) * | 2013-08-27 | 2014-08-06 | 汉滨灯饰(东莞)有限公司 | Copper sheet position detection device for lamp sockets |
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| CN104438125A (en) | 2015-03-25 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 Termination date: 20171211 |