CN104457598B - Filament diameter detection means and method - Google Patents
Filament diameter detection means and method Download PDFInfo
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- CN104457598B CN104457598B CN201410816240.9A CN201410816240A CN104457598B CN 104457598 B CN104457598 B CN 104457598B CN 201410816240 A CN201410816240 A CN 201410816240A CN 104457598 B CN104457598 B CN 104457598B
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Abstract
The invention discloses a kind of filament diameter detection means, including：Liquid crystal display, micro imaging system, imaging sensor, image processing system；Micro imaging system is directed at liquid crystal display, and micro imaging system is connected with imaging sensor, and microscopy imaging system imaging is passed to image processing system by imaging sensor.The filament diameter detection method of the present invention, comprises the following steps：1）, the image pixel distance that is calculated between upper each liquid crystal pixel point of liquid crystal display；2）, according to the pixel actual interval of liquid crystal display, calculate the ratio of the image pixel distance and actual range in image；3）, calculate filament pixel diameter in a liquid crystal display；4）, according to step 2）Obtained ratio calculates the actual diameter of filament.The present invention is advantageous in that：The uniformity and accuracy of each pixel in liquid crystal display are taken full advantage of, measures filament diameter in a non-contact manner, and system and device is simple, it is easy to operate.
Description
Technical field
The present invention relates to a kind of method of testing and device, and in particular to a kind of filament diameter detection based on liquid crystal display
Device and method.
Background technology
Increasingly consummate with modern manufacturing technique, the single pixel of liquid crystal display can more do smaller, and pixel
The uniformity can reach exactly accurate level.In addition to promoting the rapid development of modern display technology, liquid crystal is so
The development that a kind of excellent characteristic can also measure for precise measure provides certain space.
The measurement of filament diameter is all an important research direction in linear measure longimetry all the time, current measurement side
Method mainly has contact type measurement and non-contact measurement.The measuring method of contact mainly has slide calliper rule method, miking method, chi
Method, bow supreme people's court and the methods of coordinate measuring machine mensuration, although contact type measurement method using than wide, due to this kind of method
Easily measured piece surface is caused to damage, and be unable to on-line measurement, measurement efficiency is low.Contactless measuring method mainly has title
Weigh method, photovoltaic measurement and be measured microscopically method；Weight method can only measure the equal diameter of product of filament, can not determine each position of filament
Put the accurate size at place；Photovoltaic measurement mainly includes sciagraphy, interferometric method and diffraction approach, and they are respectively provided with measurement inconvenience, no
The shortcomings that stable.Conventional microscope uses visible reading, and efficiency is low, and measurement intensity is big, and human factor has a great influence during measurement,
Measurement result is unstable.
The content of the invention
To solve the deficiencies in the prior art, it is an object of the present invention to provide a kind of filament based on liquid crystal display is straight
Footpath measuring system, in the case where ensureing measurement accuracy, reduce the complexity of system, improve the convenience of measurement.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that：
Filament diameter detection means, it is characterised in that including：Liquid crystal display, micro imaging system, imaging sensor,
Image processing system；The micro imaging system is directed at liquid crystal display, and the micro imaging system is connected with imaging sensor,
Microscopy imaging system imaging is passed to image processing system by described image sensor.
Foregoing filament diameter detection means, it is characterised in that the liquid crystal display is perpendicular to micro imaging system
Optical axis.
Foregoing filament diameter detection means, it is characterised in that the object lens of the micro imaging system are replaceable thing
Mirror.
Foregoing filament diameter detection means, it is characterised in that described image sensor is CCD or CMOS.
Foregoing filament diameter detection means, it is characterised in that described image processing system is computer, single-chip microcomputer, number
Word signal processor or field programmable gate array.
Filament diameter detection method based on foregoing filament diameter detection means, it is characterised in that comprise the following steps：
1) micro imaging system, is adjusted so that each liquid crystal pixel point is clear on the liquid crystal display after amplification
The image is passed to described image processing system by clear imaging, described image sensor, and the upper every of liquid crystal display is calculated
Image pixel distance between individual liquid crystal pixel point；
2), according to the pixel actual interval of liquid crystal display, the image pixel distance and actual range in image are calculated
Ratio；
3), filament to be detected is placed on the liquid crystal display, adjusts the micro imaging system again so that put
The image is passed to described image processing system by the filament blur-free imaging after big, described image sensor, described in calculating
Pixel diameter of the filament in the liquid crystal display；
4), the ratio obtained according to step 2) calculates the actual diameter of filament.
Foregoing filament diameter detection method, it is characterised in that in the step 1), image pixel distance refers to by micro-
The distance in units of image pixel between two targets in the digital picture obtained after imaging system and imaging sensor,
Calculating the image pixel distance method in liquid crystal display between two adjacent pixels is：It is any to take liquid crystal pixel point
A color in RGB sub-pixs point is handled, the center using the sub-pix dot center of the color as the liquid crystal pixel point,
And the liquid crystal display sub-pix point position in the method detection image of use LPF, Threshold segmentation, target detection, then
Using the pixel distance in multiple liquid crystal displays take the method for average be calculated pixel adjacent in liquid crystal display it
Between image pixel distance.
Foregoing filament diameter detection method, it is characterised in that in the step 2), between the pixel reality of liquid crystal display
Every referring to the actual range in liquid crystal display between two adjacent pixels.
Foregoing filament diameter detection method, it is characterised in that in the step 2), in liquid crystal display two it is adjacent
Actual range between pixel is calculated by following formula：
In formula, x represents the actual range between two adjacent pixels of the k inch displays that resolution ratio is m × n.
Foregoing filament diameter detection method, it is characterised in that in the step 3), calculate the filament in the liquid crystal
Pixel diameter in display, is the edge that two sides of filament are detected by the method for rim detection, then calculate two edges
Between pixel distance.
The present invention is advantageous in that：Take full advantage of in liquid crystal display the uniformity of each pixel and accurate
Property, filament diameter is measured in a non-contact manner, so both convenience and high-efficiency, measurement result are again stable for measurement, and system and device is simple,
It is easy to operate.
Brief description of the drawings
Fig. 1 is the structural representation of filament diameter detection means of the present invention.
The implication of reference in figure：
1- filaments, 2- liquid crystal displays, 3- micro imaging systems, 4- imaging sensors, 5- image processing systems.
Embodiment
Make specific introduce to the present invention below in conjunction with the drawings and specific embodiments.
Filament diameter detection means as shown in Figure 1, including：Liquid crystal display 2, micro imaging system 3, imaging sensor
4th, image processing system 5；Micro imaging system 3 is directed at liquid crystal display 2, and micro imaging system 3 is connected with imaging sensor 4,
Microscopy imaging system imaging is passed to image processing system 5 by imaging sensor 4.
Liquid crystal display 2 perpendicular to micro imaging system 3 optical axis so that each pixel of liquid crystal display 2
It is uniformly distributed in the visual field of micro imaging system 3.
Micro imaging system 3 is optical system, and photo electric imaging system is formed by optical element, micro imaging system 3
Object lens are replaceable object lens.The multiplication factor of the object lens of micro imaging system 3 is replaceable, and the small occasion of filament diameter uses amplification
The big object lens of multiple, the big occasion of filament diameter cause the filament after imaging in image as far as possible using the small object lens of multiplication factor
On pixel distance be not less than picture pixels width 5%, so as to image procossing.
As a kind of preferred scheme, imaging sensor is CCD or CMOS, preferably face battle array CCD or CMOS.Image procossing system
Unite as computer, single-chip microcomputer, digital signal processor or field programmable gate array.
Filament diameter detection method based on filament diameter detection means, comprises the following steps：
1), adjust micro imaging system first so that on the liquid crystal display after amplification each liquid crystal pixel point clearly into
The image is passed to image processing system 5 by picture, imaging sensor 4, and liquid crystal display 2 is calculated in image processing system 5
Image pixel distance between upper each liquid crystal pixel point.
Wherein, image pixel distance refers in the digital picture by being obtained after micro imaging system 3 and imaging sensor 4
The distance in units of image pixel between two targets (i.e. determinand).Calculate two adjacent pictures in liquid crystal display 2
Image pixel distance method between element is：Arbitrarily a color in the RGB sub-pixs point of a liquid crystal pixel point is taken to carry out
Processing, the center using the sub-pix dot center of the color as the liquid crystal pixel point, and use LPF, Threshold segmentation, mesh
The liquid crystal display sub-pix point position in the method detection image of detection is marked, then using the pixel in multiple liquid crystal displays
Distance takes the image pixel distance that the method for average is calculated between pixel adjacent in liquid crystal display.
2), according to the pixel actual interval of liquid crystal display 2, the image pixel distance and actual range in image are calculated
Ratio.The pixel actual interval of liquid crystal display 2 refers to the actual range between two adjacent pixels in liquid crystal display, for
The liquid crystal display of known parameters, the value can be calculated according to its resolution ratio (m × n) and size (k inches), by formula (mx
)2+(nx)2=(k × 25.4)2Derive25.4 switching proportion between inch and mm in formula, such as
5 inch displays that one resolution ratio is 1920 × 1080, its pixel actual interval can be by formula (1920x)2+(1080x)2=
(5×25.4)2Calculate x=57.7 μm.
3) and then by filament 1 to be detected it is placed on liquid crystal display 2, adjusts micro imaging system 3 again so that put
The image is passed to image processing system 5 by the filament blur-free imaging after big, imaging sensor 4, and image processing system 5 calculates carefully
The pixel diameter of silk in a liquid crystal display.Image processing system 5 detects 1 two sides of filament by the method for rim detection
Edge, then the pixel distance between two edges is calculated, so as to obtain pixel diameter of the filament 1 in liquid crystal display 2.
4), the ratio obtained according to step 2) calculates the actual diameter of filament.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way for above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical scheme, all fall within protection scope of the present invention.
Claims (5)
1. the filament diameter detection method of filament diameter detection means, the device include：Liquid crystal display, micro imaging system,
Imaging sensor, image processing system；The micro imaging system is directed at liquid crystal display, the micro imaging system and image
Sensor is connected, and microscopy imaging system imaging is passed to image processing system by described image sensor, and its feature exists
In the filament diameter detection method of the device comprises the following steps：
1), adjust the micro imaging system so that on the liquid crystal display after amplification each liquid crystal pixel point clearly into
The image is passed to described image processing system by picture, described image sensor, and upper each liquid of liquid crystal display is calculated
Image pixel distance between brilliant pixel；
2), according to the pixel actual interval of liquid crystal display, the ratio of the image pixel distance and actual range in image is calculated；
3), filament to be detected is placed on the liquid crystal display, adjusts the micro imaging system again so that after amplification
The filament blur-free imaging, the image passes to described image processing system, calculates the filament by described image sensor
Pixel diameter in the liquid crystal display；
4), the ratio obtained according to step 2) calculates the actual diameter of filament.
2. filament diameter detection method according to claim 1, it is characterised in that in the step 1), image pixel away from
From refer to by between two targets in the digital picture that is obtained after micro imaging system and imaging sensor with image pixel
For the distance of unit, calculating the image pixel distance method in liquid crystal display between two adjacent pixels is：Arbitrarily take one
A color in the RGB sub-pixs point of individual liquid crystal pixel point is handled, using the sub-pix dot center of the color as the liquid
The center of brilliant pixel, and the liquid crystal display in the method detection image of use LPF, Threshold segmentation, target detection is sub-
Pixel position, the method for then taking average using the pixel distance in multiple liquid crystal displays are calculated in liquid crystal display
Image pixel distance between adjacent pixel.
3. filament diameter detection method according to claim 1, it is characterised in that in the step 2), liquid crystal display
Pixel actual interval refer to actual range in liquid crystal display between two adjacent pixels.
4. filament diameter detection method according to claim 3, it is characterised in that in the step 2), liquid crystal display
In actual range between two adjacent pixels be calculated by following formula：
<mrow>
<mi>x</mi>
<mo>=</mo>
<msqrt>
<mfrac>
<msup>
<mrow>
<mo>(</mo>
<mn>25.4</mn>
<mi>k</mi>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mrow>
<msup>
<mi>m</mi>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mi>n</mi>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</msqrt>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula, x represents the actual range between two adjacent pixels of the k inch displays that resolution ratio is m × n.
5. filament diameter detection method according to claim 3, it is characterised in that in the step 3), calculate described thin
Pixel diameter of the silk in the liquid crystal display, is the edge that two sides of filament are detected by the method for rim detection, then
Calculate the pixel distance between two edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410816240.9A CN104457598B (en) | 2014-12-24 | 2014-12-24 | Filament diameter detection means and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410816240.9A CN104457598B (en) | 2014-12-24 | 2014-12-24 | Filament diameter detection means and method |
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| CN104457598A CN104457598A (en) | 2015-03-25 |
| CN104457598B true CN104457598B (en) | 2017-12-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2072364T3 (en) * | 1990-01-31 | 1995-07-16 | Fraunhofer Ges Forschung | DEVICE FOR THE SIMULTANEOUS MEASUREMENT OF THE POSITIONS AND DIAMETERS OF THE FILAMENTS OF A BEAM OF FILAMENTS. |
| CN101177912B (en) * | 2007-11-29 | 2010-11-03 | 吉林大学 | Viscose rayon root number filament diameter detecting instrument |
| KR20100026240A (en) * | 2008-08-29 | 2010-03-10 | 김상국 | 3d hair style simulation system and method using augmented reality |
| CN201867174U (en) * | 2010-11-26 | 2011-06-15 | 四川辉煌测控设备有限公司 | Filament diameter admeasuring apparatus |
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Address after: Room 101, Floor 1, Building 1, No. 15, Jiuzhou Road, Shangcheng District, Hangzhou, Zhejiang Patentee after: Zhejiang Jiangao Photoelectric Technology Co.,Ltd. Address before: 215300 No.232 Yuanfeng Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: SUZHOU JIANG'AO OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |