CN103308173A - Color difference measuring method and device - Google Patents
Color difference measuring method and device Download PDFInfo
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- CN103308173A CN103308173A CN2013101885050A CN201310188505A CN103308173A CN 103308173 A CN103308173 A CN 103308173A CN 2013101885050 A CN2013101885050 A CN 2013101885050A CN 201310188505 A CN201310188505 A CN 201310188505A CN 103308173 A CN103308173 A CN 103308173A
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Abstract
The invention provides a color difference measuring method and device. The color difference measuring method and device not only can be used for measuring the color difference of a specimen of which the surface color is uniform but also can be used for measuring the color difference of a specimen of which the surface color is not uniform. The method comprises the following steps: acquiring images, selecting areas, performing Lab conversion and calculating deltaE values. The device mainly comprises the following parts: an objective table (1), a light source (2), photographing equipment (3), a universal serial bus (USB) data line (4), a computer (5) and the like. The color difference measuring device provided by the invention is simple in structure, is easy to operate and is rapid and direct. The color difference measuring method and device provided by the invention are suitable for practical application.
Description
Technical field
The present invention relates to a kind of chromatism measurement method and device.
Background technology
All relate to the detection of surface chromatic aberration in conglomeraties such as research work or plastic cement, printing, paint, printing ink, textile garments.For example, in research work, study certain catalyzer decolouring situation to sample surfaces under different condition, according to the aberration that detects sample surfaces under the different condition, just can the better condition of optimization.
At present, dissimilar color difference meter has been arranged, such as color colour difference meter, portable spectrophotometric color measurement instrument and desk-top spectral photometric colour measuring color matching instrument etc.But they all require the color of sample surfaces is more uniform, then has no way out for the sample that surface color is inhomogeneous, even adopt various average mode to measure, the error of test result is also quite large.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and device of chromatism measurement, can measure the sample aberration of surface color homogeneous, can measure again the inhomogenous sample aberration of surface color.
To achieve these goals, the invention provides a kind of method of chromatism measurement, comprise the steps:
A) testing sample is placed on the objective table;
B) light source irradiation of illuminance and color temperature constant is at sample surfaces;
C) photographing device is taken pictures to sample surfaces;
D) Computer Analysis goes out L, a, the b mean value in the whole zone of sample surfaces;
E) all testing samples are all finished a) to d) step;
F) specifying a certain sample is reference substance, and Computer Analysis goes out other sample surfaces with respect to the aberration on reference substance surface.
Implement the device of this chromatism measurement method, comprising: objective table, light source, photographing device, usb data line and computing machine etc.
Preferably, described objective table is inner at whole device.
Preferably, described light source is the D65 standard sources, and source of parallel light is placed in the objective table both sides.
Preferably, described photographing device is high-definition camera.
Preferably, described device connects special purpose computer, and the supporting image processing software of described computing machine is automatically converted to the Lab pattern with image by the RGB pattern, and calculates value of chromatism Δ E according to reference substance.
Preferably, described photographing device is high-definition camera.
Description of drawings
Fig. 1 is a preferred structure schematic diagram of color difference measuring device of the present invention.
Fig. 2 is a preferred flow charts of chromatism measurement method of the present invention.
Fig. 3 is the sample image that utilizes method of the present invention to take among the embodiment 1.
Fig. 4 is L, a, b value and the Δ E value of utilizing each sample that method of the present invention records among the embodiment 1.
Fig. 5 is the sample image that utilizes method of the present invention to take among the embodiment 2.
Fig. 6 is L, a, b value and the Δ E value of utilizing each sample that method of the present invention records among the embodiment 2.
Embodiment
Following examples are to further specify of the present invention.
Embodiment 1
The present embodiment is the embodiment of sample surfaces color homogeneous.Testing sample is the rose card of 6 kinds of color continuous gradations.Each sample is placed respectively on the objective table of described color difference measuring device, open light source, taking pictures respectively obtains the image of each sample, such as Fig. 3.L, a, the b value of each imaging surface of Computer Analysis that use device connects, take No. 1 as reference substance, calculate the Δ E value of other sample according to the Lab value, result such as Fig. 4.
Embodiment 2
The present embodiment is the embodiment of sample surfaces irregular colour one.Testing sample has dye decolored function, drips rhdamine B on its surface, and with the prolongation of standing time, the color of sample surfaces dyestuff is more and more shallow.Fig. 5 is the sample surfaces image that utilizes the different time sections that the method for the invention obtains, and numbers respectively No. 1 to No. 6.Each regional L, a, b mean value are analyzed in the dyestuff overlay area of selected each image of the computing machine that use device connects, take No. 1 as reference substance, go out Δ E value, result such as Fig. 6 according to the Lab mean value calculation.
In sum, above embodiment is not for limiting protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the method for a chromatism measurement is characterized in that, comprising:
Testing sample is placed on the objective table;
The light source irradiation of illuminance and color temperature constant is at sample surfaces;
Photographing device is taken pictures to sample surfaces;
Computer Analysis goes out L, a, the b mean value in the whole zone of sample surfaces;
All testing samples are all finished front 4 steps;
Specifying a certain sample is reference substance, and Computer Analysis goes out other sample surfaces with respect to the aberration on reference substance surface.
2. implement the device of chromatism measurement method as claimed in claim 1, it is characterized in that: this device comprises the parts such as objective table (1), light source (2), photographing device (3), usb data line (4) and computing machine (5).
3. color difference measuring device as claimed in claim 2 is characterized in that: described objective table (1) is inner at whole device.
4. color difference measuring device as claimed in claim 2 is characterized in that: described light source (2) is the D65 standard sources, and source of parallel light is placed in objective table (1) both sides.
5. color difference measuring device as claimed in claim 2, it is characterized in that: described photographing device (3) is high-definition camera.
6. color difference measuring device as claimed in claim 2 is characterized in that: described device connects special purpose computer, and the supporting image processing software of described computing machine (5) is automatically converted to the Lab pattern with image by the RGB pattern, and calculates value of chromatism Δ E according to reference substance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101885050A CN103308173A (en) | 2013-05-21 | 2013-05-21 | Color difference measuring method and device |
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| CN2013101885050A CN103308173A (en) | 2013-05-21 | 2013-05-21 | Color difference measuring method and device |
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| CN103308173A true CN103308173A (en) | 2013-09-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542937A (en) * | 2013-10-08 | 2014-01-29 | 杭州慕锐网络技术有限公司 | Digital printing color difference inspecting method |
| CN105092041A (en) * | 2015-08-26 | 2015-11-25 | 中国第一汽车股份有限公司 | Method for controlling color aberration of paint coating of diesel engine by use of color difference meter |
| CN106546540A (en) * | 2016-11-03 | 2017-03-29 | 江苏鑫源烟草薄片有限公司 | The method that chromatism method measures reconstituted tobacco spreading rate |
| CN110987836A (en) * | 2019-12-10 | 2020-04-10 | 深圳市能源环保有限公司 | Method for rapidly measuring and calculating sludge heat value based on CIELAB color space |
| CN112051232A (en) * | 2020-09-25 | 2020-12-08 | 重庆长安汽车股份有限公司 | Method for evaluating color change of gradient color sample |
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| CN101799329A (en) * | 2010-03-04 | 2010-08-11 | 江西中医学院 | Method for detecting color of Chinese herbal tablet |
| JP2011002336A (en) * | 2009-06-18 | 2011-01-06 | Iwasaki Electric Co Ltd | Device and program for generating conspicuous image |
| GB2474701A (en) * | 2009-10-26 | 2011-04-27 | Richard Frank Lawn | A handheld device for measuring the colour properties of objects |
| CN103063310A (en) * | 2013-01-18 | 2013-04-24 | 岑夏凤 | Non-contact type color measurement method and non-contact type color measurement device based on digital technology |
| CN202916012U (en) * | 2012-12-10 | 2013-05-01 | 屈建华 | Device for automatically detecting colour difference of plane figures |
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2013
- 2013-05-21 CN CN2013101885050A patent/CN103308173A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011002336A (en) * | 2009-06-18 | 2011-01-06 | Iwasaki Electric Co Ltd | Device and program for generating conspicuous image |
| GB2474701A (en) * | 2009-10-26 | 2011-04-27 | Richard Frank Lawn | A handheld device for measuring the colour properties of objects |
| CN101799329A (en) * | 2010-03-04 | 2010-08-11 | 江西中医学院 | Method for detecting color of Chinese herbal tablet |
| CN202916012U (en) * | 2012-12-10 | 2013-05-01 | 屈建华 | Device for automatically detecting colour difference of plane figures |
| CN103063310A (en) * | 2013-01-18 | 2013-04-24 | 岑夏凤 | Non-contact type color measurement method and non-contact type color measurement device based on digital technology |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542937A (en) * | 2013-10-08 | 2014-01-29 | 杭州慕锐网络技术有限公司 | Digital printing color difference inspecting method |
| CN103542937B (en) * | 2013-10-08 | 2015-05-20 | 杭州慕锐网络技术有限公司 | Digital printing color difference inspecting method |
| CN105092041A (en) * | 2015-08-26 | 2015-11-25 | 中国第一汽车股份有限公司 | Method for controlling color aberration of paint coating of diesel engine by use of color difference meter |
| CN106546540A (en) * | 2016-11-03 | 2017-03-29 | 江苏鑫源烟草薄片有限公司 | The method that chromatism method measures reconstituted tobacco spreading rate |
| CN110987836A (en) * | 2019-12-10 | 2020-04-10 | 深圳市能源环保有限公司 | Method for rapidly measuring and calculating sludge heat value based on CIELAB color space |
| CN112051232A (en) * | 2020-09-25 | 2020-12-08 | 重庆长安汽车股份有限公司 | Method for evaluating color change of gradient color sample |
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Application publication date: 20130918 |