CN113884187A - Screen detection method based on color difference value calculation - Google Patents
Screen detection method based on color difference value calculation Download PDFInfo
- Publication number
- CN113884187A CN113884187A CN202111262800.7A CN202111262800A CN113884187A CN 113884187 A CN113884187 A CN 113884187A CN 202111262800 A CN202111262800 A CN 202111262800A CN 113884187 A CN113884187 A CN 113884187A
- Authority
- CN
- China
- Prior art keywords
- screen
- color difference
- difference value
- colorimeter
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 238000007689 inspection Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003086 colorant Substances 0.000 claims description 8
- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 235000009566 rice Nutrition 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 4
- 230000004075 alteration Effects 0.000 description 8
- 241000209094 Oryza Species 0.000 description 3
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001040 synthetic pigment Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J2003/467—Colour computing
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention belongs to the technical field of screen detection, in particular to a screen detection method based on color difference value calculation, which utilizes a linear module to drive a colorimeter to move and carries out color difference detection on a screen to be detected placed on a screen detection table, and specifically comprises the following steps: selecting a standard sample image; step two: placing a screen to be detected on the top surface of a screen detection table, and ensuring that the display surface of the screen faces upwards; step three: driving the colorimeter to move by using the linear module, and shooting a display surface of the screen by using the colorimeter; step four: and calculating the color difference value of the screen by using the model. The inspection method of the invention utilizes the model to calculate the color difference value of the screen, the detection precision is greatly improved, and the visual consistency of the color difference value detection is improved; the operation is convenient and fast, the detection efficiency is high, and the screens with various specifications can be detected, and meanwhile, a plurality of groups of screens can be simultaneously detected on line; the degree of automation is high, can satisfy the detection requirement of present overwhelming majority of screens.
Description
Technical Field
The invention belongs to the technical field of screen detection, and particularly relates to a screen detection method based on color difference value calculation, which is used for detecting a mobile phone screen.
Background
When white light is used for imaging, besides five monochromatic aberrations generated by each monochromatic light, chromatic dispersion caused by different refractive indexes of different colored lights can cause different transmission light paths of different colored lights, so that the aberration caused by the difference of the light paths of different colored lights is presented, and the aberration is called chromatic aberration (chromatic aberration for short), and the chromatic aberration is divided into two types of chromatic aberration of position and chromatic aberration of magnification due to different properties.
Color difference values generally evaluate color differences, with a colorimeter, which is a laboratory instrument that measures or specifies color by comparison with synthetic pigments, typically a colorimeter having a standard light source, three colored filters, photocells, and a standard reflective panel, and more advanced colorimeters have photocells and electronic circuitry instead of the human eye as the receptor, thus speeding up the acquisition of results. The result of colorimeter detection is called chroma.
Colorimeters are a common device for screen testing.
When the traditional screen detects the color difference value, the detection efficiency is low, and the detection precision is difficult to ensure.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a screen detection method based on color difference value calculation, which has the characteristics of high detection efficiency and high detection precision.
In order to achieve the purpose, the invention provides the following technical scheme: a screen detection method based on color difference value calculation utilizes a linear module to drive a colorimeter to move, and performs color difference detection on a screen to be detected placed on a screen detection table, and specifically comprises the following steps:
the method comprises the following steps: selecting a standard sample image;
step two: placing a screen to be detected on the top surface of a screen detection table, and ensuring that the display surface of the screen faces upwards;
step three: driving the colorimeter to move by using the linear module, and shooting a display surface of the screen by using the colorimeter;
step four: by means of L*a*b*The model calculates the color difference value of the screen.
As a preferable technical scheme, the screen inspection device further comprises a rack, the screen inspection table is fixed in the rack, and the linear module is installed on the rack and is located right above the screen inspection table.
As a preferred technical solution of the present invention, the linear module is a three-axis linear module.
As a preferable technical scheme of the invention, in the third step, L is utilized*a*b*The method for calculating the color difference value of the screen by the model specifically comprises the following steps:
step 1: the vertical distance between the colorimeter and the screen shooting surface is L, and the lightness is L*Shooting by making the colorimeter vertical to the screen display surface;
step 2: calculating the minimum area of the screen display surface;
step 3: calculating L over minimum area*、a*And b*Value and according to the calculated L*、a*And b*The value calculates the color difference value deltae value of the screen.
As a preferred technical scheme of the invention, the calculation formula of the screen color difference value delta E is as follows:
wherein L is*Is the lightness of a*、b*Is a product of the color of rice,
and
the lightness difference of the two colors is:
the chromaticity difference is:
and
as a preferred technical scheme of the invention, two groups of limit sensors which are symmetrically distributed are arranged on the rack.
Compared with the prior art, the invention has the beneficial effects that:
1. the inspection method of the present invention utilizes L*a*b*The color difference value of the screen is calculated by the model, so that the detection precision is greatly improved, and the visual consistency of color difference value detection is improved;
2. the inspection method is convenient to operate and high in detection efficiency, and can be used for detecting screens of various specifications and simultaneously detecting a plurality of groups of screens on line;
3. the inspection method has high automation degree, and can meet the detection requirements of most current screens.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the detection of the present invention;
FIG. 2 is a schematic diagram of a detection system framework of the present invention;
in the figure: 1. a frame; 2. a screen detection table; 3. a linear module; 4. a colorimeter; 5. and a limit sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present invention provides the following technical solutions: a screen detection method based on color difference value calculation utilizes a linear module 3 to drive a colorimeter 4 to move, and carries out color difference detection on a screen to be detected placed on a screen detection table 2, and specifically comprises the following steps:
the method comprises the following steps: selecting a standard sample image;
step two: placing a screen to be detected on the top surface of the screen detection table 2, and ensuring that the display surface of the screen faces upwards;
step three: the linear module 3 is used for driving the colorimeter 4 to move, and the display surface of the screen is shot through the colorimeter 4;
step four: by means of L*a*b*The model calculates the color difference value of the screen.
Specifically, as shown in fig. 1 and fig. 2, in this embodiment, the apparatus further includes a frame 1, the screen inspection table 2 is fixed in the frame 1, the linear module 3 is installed on the frame 1 and located right above the screen inspection table 2, and the linear module 3 provides power for movement of the colorimeter 4, so as to realize shooting of the screen.
Specifically, according to fig. 1 and fig. 2, in this embodiment, the linear module 3 is a three-axis linear module, and can move along X, Y and the Z direction, so as to ensure the reliability of detection, and make the device suitable for most current screens.
Specifically, referring to fig. 1 and 2, in the present embodiment, L is utilized in the third step*a*b*The method for calculating the color difference value of the screen by the model specifically comprises the following steps:
step 1: the vertical distance between the colorimeter 4 and the screen shooting surface is L, and the lightness is L*Shooting by making the colorimeter 4 vertical to the screen display surface;
step 2: calculating the minimum area of the screen display surface;
step 3: calculating L over minimum area*、a*And b*Value and according to the calculated L*、a*And b*The value calculates the color difference value deltae value of the screen.
Specifically, according to fig. 1 and fig. 2, in this embodiment, the calculation formula of the screen color difference value Δ E is as follows:
wherein L is*Is the lightness of a*、b*Is a product of the color of rice,
and
the lightness difference of the two colors is:
the chromaticity difference is:
and
L*represents black/white, a*Represents red/green, b*Represents yellow/blue, wherein, + a*Represents red, -a*Represents green; + b*Represents yellow, -b*Indicating blue.
When Δ L*When the color is more than 0, the color of the sample is lighter than the standard color, the lightness is higher, otherwise, the lightness is lower; when Δ a*When the color is more than 0, the color of the sample is more red than the standard color, otherwise, the color is more green; when Δ b*When the color is more than 0, the color of the sample is more yellow than the standard color, and the color is more blue.
Furthermore, L*a*b*The model is converted from an RGB model, the RGB model is a hardware-oriented model, is derived from three visual languages, namely three single colors of red, green and blue, and can be synthesized into all colors existing in the nature, and the model is as follows:
C(C)＝R(R)+G(G)+B(B)
the conversion formula from the RGB model to the XYZ model is as follows:
in the formula, the gamma function is used for carrying out nonlinear tone editing on an image, and the aim is to improve the contrast of the image.
XYZ model to L*a*b*The transformation formula of the model is as follows:
in the formula (I);
in the formula (I); x, Y and Z are tristimulus values of the color sample; xn，Yn，ZnIs the tristimulus value of a white stimulus which is illuminated by the CIE standard illuminant onto the fully diffuse reflector and reflected by the fully diffuse reflector into the observer's eye.
Example 2
Referring to fig. 1-2, the present invention provides the following technical solutions: a screen detection method based on color difference value calculation utilizes a linear module 3 to drive a colorimeter 4 to move, and carries out color difference detection on a screen to be detected placed on a screen detection table 2, and specifically comprises the following steps:
the method comprises the following steps: selecting a standard sample image;
step two: placing a screen to be detected on the top surface of the screen detection table 2, and ensuring that the display surface of the screen faces upwards;
step three: the linear module 3 is used for driving the colorimeter 4 to move, and the display surface of the screen is shot through the colorimeter 4;
step four: by means of L*a*b*The model calculates the color difference value of the screen.
Specifically, as shown in fig. 1 and fig. 2, in this embodiment, the apparatus further includes a frame 1, the screen inspection table 2 is fixed in the frame 1, the linear module 3 is installed on the frame 1 and located right above the screen inspection table 2, and the linear module 3 provides power for movement of the colorimeter 4, so as to realize shooting of the screen.
Specifically, according to fig. 1 and fig. 2, in this embodiment, the linear module 3 is a three-axis linear module, and can move along X, Y and the Z direction, so as to ensure the reliability of detection, and make the device suitable for most current screens.
Specifically, referring to fig. 1 and 2, in the present embodiment, L is utilized in the third step*a*b*The method for calculating the color difference value of the screen by the model specifically comprises the following steps:
step 1: the vertical distance between the colorimeter 4 and the screen shooting surface is L, and the lightness is L*Shooting by making the colorimeter 4 vertical to the screen display surface;
step 2: calculating the minimum area of the screen display surface;
step 3: calculating L over minimum area*、a*And b*Value and according to the calculated L*、a*And b*The value calculates the color difference value deltae value of the screen.
Specifically, according to fig. 1 and fig. 2, in this embodiment, the calculation formula of the screen color difference value Δ E is as follows:
wherein L is*Is the lightness of a*、b*Is a product of the color of rice,
and
the lightness difference of the two colors is:
the chromaticity difference is:
and
L*represents black/white, a*Represents red/green, b*Represents yellow/blue, wherein, + a*Represents red, -a*Represents green; + b*Represents yellow, -b*Indicating blue.
When Δ L*When the color is more than 0, the color of the sample is lighter than the standard color, the lightness is higher, otherwise, the lightness is lower; when Δ a*When the color is more than 0, the color of the sample is more red than the standard color, otherwise, the color is more green; when Δ b*When the color is more than 0, the color of the sample is more yellow than the standard color, and the color is more blue.
Furthermore, L*a*b*The model is converted from an RGB model, the RGB model is a hardware-oriented model, is derived from three visual languages, namely three single colors of red, green and blue, and can be synthesized into all colors existing in the nature, and the model is as follows:
C(C)＝R(R)+G(G)+B(B)
the conversion formula from the RGB model to the XYZ model is as follows:
in the formula, the gamma function is used for carrying out nonlinear tone editing on an image, and the aim is to improve the contrast of the image.
XYZ model to L*a*b*The transformation formula of the model is as follows:
in the formula (I);
in the formula (I); x, Y and Z are tristimulus values of the color sample; xn，Yn，ZnIs the tristimulus value of a white stimulus which is illuminated by the CIE standard illuminant onto the fully diffuse reflector and reflected by the fully diffuse reflector into the observer's eye.
Specifically, as shown in fig. 1 and fig. 2, in this embodiment, two sets of limit sensors 5 are mounted on the frame 1, which are symmetrically distributed, so as to ensure the safety of the operation of the device and limit the moving range of the device colorimeter 4.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A screen detection method based on color difference value calculation is characterized in that a linear module (3) is used for driving a colorimeter (4) to move, and color difference detection is carried out on a screen to be detected placed on a screen detection table (2), and the method specifically comprises the following steps:
the method comprises the following steps: selecting a standard sample image;
step two: placing a screen to be detected on the top surface of the screen detection table (2) to ensure that the display surface of the screen faces upwards;
step three: the linear module (3) is used for driving the colorimeter (4) to move, and the display surface of the screen is shot through the colorimeter (4);
step four: by means of L*a*b*The model calculates the color difference value of the screen.
2. The screen detection method based on color difference value calculation according to claim 1, characterized in that: still include frame (1), screen inspection platform (2) are fixed in frame (1), straight line module (3) are installed just above screen inspection platform (2) on frame (1).
3. The screen detection method based on color difference value calculation according to claim 1, characterized in that: the straight line module (3) is a three-axis straight line module.
4. The screen detection method based on color difference value calculation according to claim 1, characterized in that: in the third step, L is utilized*a*b*The method for calculating the color difference value of the screen by the model specifically comprises the following steps:
step 1: colorimeter (4) to screen shot surfaceA vertical distance therebetween is L, and lightness thereof is L*Shooting by making the colorimeter (4) vertical to the screen display surface;
step 2: calculating the minimum area of the screen display surface;
step 3: calculating L over minimum area*、a*And b*Value and according to the calculated L*、a*And b*The value calculates the color difference value deltae value of the screen.
5. The screen detection method based on color difference value calculation according to claim 4, characterized in that: the calculation formula of the screen color difference value Δ E is as follows:
wherein L is*Is the lightness of a*、b*Is a product of the color of rice,
and
the lightness difference of the two colors is:
the chromaticity difference is:
and
6. the screen detection method based on color difference value calculation according to claim 1, characterized in that: two groups of limit sensors (5) which are symmetrically distributed are arranged on the frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111262800.7A CN113884187A (en) | 2021-10-28 | 2021-10-28 | Screen detection method based on color difference value calculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111262800.7A CN113884187A (en) | 2021-10-28 | 2021-10-28 | Screen detection method based on color difference value calculation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113884187A true CN113884187A (en) | 2022-01-04 |
Family
ID=79013835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111262800.7A Pending CN113884187A (en) | 2021-10-28 | 2021-10-28 | Screen detection method based on color difference value calculation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113884187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117522792A (en) * | 2023-10-27 | 2024-02-06 | 神力视界(深圳)文化科技有限公司 | Color difference detection method and device, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104349159A (en) * | 2013-08-05 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Screen test system and method |
| CN104575344A (en) * | 2015-01-08 | 2015-04-29 | 深圳市雅视科技有限公司 | Screen quality detecting method and system based on brightness colorimeter |
| CN105678700A (en) * | 2016-01-11 | 2016-06-15 | 苏州大学 | Image interpolation method and system based on prediction gradient |
-
2021
- 2021-10-28 CN CN202111262800.7A patent/CN113884187A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104349159A (en) * | 2013-08-05 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Screen test system and method |
| CN104575344A (en) * | 2015-01-08 | 2015-04-29 | 深圳市雅视科技有限公司 | Screen quality detecting method and system based on brightness colorimeter |
| CN105678700A (en) * | 2016-01-11 | 2016-06-15 | 苏州大学 | Image interpolation method and system based on prediction gradient |
Non-Patent Citations (1)
| Title |
|---|
| 林茂海等: "颜色科学与技术", 31 May 2019, pages: 43 - 45 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117522792A (en) * | 2023-10-27 | 2024-02-06 | 神力视界(深圳)文化科技有限公司 | Color difference detection method and device, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107144353B (en) | A kind of textile chromatism measurement method based on digital camera | |
| CN100440983C (en) | Constitiution method and device used for flat plate TV light and colour automatic regulating and testing system | |
| CN109506781B (en) | Chrominance measuring method and device | |
| CN208155884U (en) | A kind of vision-based detection light source module group | |
| CN108020519A (en) | A kind of virtual multiple light courcess spectrum reconstruction method based on color constancy | |
| CN110644216B (en) | Automatic color fastness grading device of fabrics | |
| CN113884187A (en) | Screen detection method based on color difference value calculation | |
| CN106448525A (en) | System and method for measuring color uniformity of medical display | |
| CN103196559A (en) | Electronic Lovibond color measurement method and detection system thereof | |
| CN109459136B (en) | Method and device for measuring chromaticity | |
| CN108844632B (en) | Method for evaluating metamerism difference of observers among different display devices | |
| CN208459716U (en) | A kind of liquid crystal display detection device | |
| US7659982B2 (en) | Quantitative evaluation of a color filter | |
| Finlayson et al. | Root-polynomial colour correction | |
| CN1982953A (en) | Method for adjusting display device white balance and liquid-crystal display device | |
| JP2006333463A (en) | Color characteristic verification system for eye, light source and color reproducing apparatus | |
| CN110324476B (en) | Method for representing color generation performance of mobile phone screen | |
| CN101931822A (en) | Automatic white balance system and method thereof | |
| CN207197666U (en) | A kind of novel color luminance meter | |
| KR102411981B1 (en) | A viewer for color correction, and a color correction set using it | |
| CN115834872A (en) | Method for rapidly measuring three-dimensional color gamut of multi-primary color display system | |
| CN108844633B (en) | Experimental method for detecting observer metamerism difference between display devices | |
| JP2019049539A (en) | Transition type color calibration chart | |
| CN114046880A (en) | Color difference correction method for LED spliced display screen | |
| CN105572055A (en) | Non-contact type color detecting method based on digital image technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |