CN102818623B - Method and system for calibrating brightness and chrominance meter - Google Patents
Method and system for calibrating brightness and chrominance meter Download PDFInfo
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- CN102818623B CN102818623B CN201210319778.XA CN201210319778A CN102818623B CN 102818623 B CN102818623 B CN 102818623B CN 201210319778 A CN201210319778 A CN 201210319778A CN 102818623 B CN102818623 B CN 102818623B
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Abstract
The invention discloses a method for calibrating a brightness and chrominance meter. The method comprises the steps of measuring a preset auxiliary light source to obtain a measured brightness value and a measured chrominance value of the auxiliary light source, calculating brightness value conversion relation between the measured brightness value of the auxiliary light source and the measured chrominance value of the auxiliary light source and chrominance value conversion relation between the measured brightness value of the auxiliary light source and the measured chrominance value of the auxiliary light source, measuring a measured object to obtain a measured brightness value and a measured chrominance value of the measured object, calculating the brightness value of the measured object according to the measured brightness value of the measured object and the brightness value conversion relation, and calculating the chrominance value of the measured object according to the measured chrominance value of the measured object and the chrominance value conversion relation. Correspondingly, the invention further provides system for calibrating the brightness and chrominance meter. The brightness and chrominance meter is not required to be sent to an instrument calibration mechanism for special calibration, and the method and the system do not influence work progress and are high in measurement precision, quick and practical.
Description
Technical field
The present invention relates to light tone degree meter calibrating technical field, particularly relate to a kind of calibration steps of bright colorimeter, and a kind of calibration system of bright colorimeter.
Background technology
Along with the prolongation of service time, the measuring accuracy of bright colorimeter can decline thereupon, and therefore bright colorimeter needs periodic calibration, and its test parameter that standardizes makes it be operated in stable state, ensures measuring accuracy.The calibration of general bright colorimeter need regularly be delivered to special instrument calibration mechanism and carry out specialty calibration.
But in practical operation, due to need of work, bright colorimeter is generally all arranged on fixed support, when bright colorimeter is delivered to, specialized agency calibrates or timing signal, need to dismantle instrument, and the installation accuracy while again installation is difficult to ensure.
Further, bright colorimeter needs to use incessantly for a long time, or using quite frequently in situation, proofreaies and correct bright colorimeter if be regularly sent to special instrument calibration mechanism, can delay normal work; If but do not carry out regular calibration, the long-term use error of bright colorimeter is larger, can affect measuring accuracy.
Summary of the invention
Based on this, the invention provides a kind of calibration steps and system of bright colorimeter, carry out professional calibration and can realize accurate measurement without bright colorimeter regularly being delivered to instrument calibration mechanism, can not affect job schedule, work efficiency significantly improves, measuring accuracy is high, measuring process is simple and practical fast.
A calibration steps for bright colorimeter, comprises the steps:
Measure default secondary light source, obtain the measurement brightness value of described secondary light source and measure chromatic value;
Calculate the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of described secondary light source and described secondary light source;
Measure measured object, obtain the measurement brightness value of described measured object and measure chromatic value;
Calculate the brightness value of described measured object according to the measurement brightness value of described measured object and described brightness value transformational relation, calculate the chromatic value of described measured object according to the measurement chromatic value of described measured object and described chromatic value transformational relation;
Wherein, the step of the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of the brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of the described secondary light source of described calculating and described secondary light source is:
Calculate the ratio between measurement brightness value and the brightness value of described secondary light source of described secondary light source, obtain described brightness value transformational relation;
Calculate the ratio between measurement chromatic value and the chromatic value of described secondary light source of described secondary light source, obtain described chromatic value transformational relation.
A calibration system for bright colorimeter, comprises secondary light source measurement module, the first computing module, measured object measurement module and the second computing module;
Described secondary light source measurement module, for measuring default secondary light source, obtains the measurement brightness value of described secondary light source and measures chromatic value;
Described the first computing module is for calculating the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of described secondary light source and described secondary light source;
Described measured object measurement module is used for measuring measured object, obtains the measurement brightness value of described measured object and measures chromatic value;
Described the second computing module is for calculate the brightness value of described measured object according to the measurement brightness value of described measured object and described brightness value transformational relation, calculates the chromatic value of described measured object according to the measurement chromatic value of described measured object and described chromatic value transformational relation;
Wherein, described the first computing module comprises brightness value computing module and chromatic value computing module;
Described brightness value computing module, for calculating the ratio between measurement brightness value and the brightness value of described secondary light source of described secondary light source, obtains described brightness value transformational relation;
Described chromatic value computing module, for calculating the ratio between measurement chromatic value and the chromatic value of described secondary light source of described secondary light source, obtains described chromatic value transformational relation.
The calibration steps of above-mentioned bright colorimeter and system, obtain the measurement brightness value of described secondary light source and measure chromatic value by measuring secondary light source, then comparing with brightness value and the chromatic value of this standard sources, obtains both transformational relations; Obtaining the measurement brightness value of measured object and measuring after chromatic value, can calculate by described transformational relation brightness value and the chromatic value of measured object;
The present invention obtains the transformational relation of bright colorimeter between error amount and actual value by a secondary light source, and the measured value of this bright colorimeter can be revised according to this transformational relation, thereby greatly improves measuring accuracy;
Implementation procedure of the present invention is quick and convenient, and bright colorimeter carries out professional calibration and can realize high-precision measurement without delivering to correcting mechanism, and work efficiency significantly improves.
Brief description of the drawings
Fig. 1 is the schematic flow sheet in one embodiment of calibration steps of the bright colorimeter of the present invention.
Fig. 2 is the structural representation in one embodiment of calibration system of the bright colorimeter of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, be the calibration steps of the bright colorimeter of the present invention schematic flow sheet in a preferred embodiment, comprise the steps:
S11, measure default secondary light source, obtain the measurement brightness value of described secondary light source and measure chromatic value;
Select arbitrarily a light source as secondary light source, with this light source of light tone degree instrumentation amount, obtain the measurement brightness value of this secondary light source and measure chromatic value; Bright colorimeter may be longer due to service time, precise decreasing, and may there is error in the bright chromatic value of reality of the brightness value now measuring and chromatic value and this light source, the not necessarily actual value of this secondary light source.
S12, calculate the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of described secondary light source and described secondary light source;
The reference light source that described secondary light source calibrates for error as this bright colorimeter, its brightness value and chromatic value are known; Bright colorimeter, measuring the measurement data obtaining after this secondary light source, calculates with the bright chromatic value of this secondary light source, can obtain transformational relation;
The brightness value of above-mentioned secondary light source and chromatic value, in a preferred embodiment, described secondary light source can adopt standard light source capsule, because standard light source capsule can provide standard sources, brightness value and chromatic value that this standard sources is dispatched from the factory are known, carry out Measurement and calibration with it as secondary light source, and the calculating of transformational relation is to adopt the error amount of light tone degree instrumentation amount and the actual value of standard sources, therefore result of calculation is accurate, can effectively improve measuring accuracy;
If do not adopt standard light source capsule, also can use any light source, light tone degree meter measures the measurement brightness value of this light source and measures chromatic value; And the true brightness value of this light source and chromatic value can select the bright colorimeter that a known precision is higher else and measure, the bright chromatic value that light tone degree meter higher known precision is measured, as benchmark, can calculate transformational relation equally;
The acquisition of transformational relation between measured value and actual value, can adopt multiple account form, sets up accurate transformational relation such as taking multiple measurements both relevance functions of acquisition;
In a preferred embodiment, step S12 specifically can be:
Calculate the ratio between measurement brightness value and the brightness value of described secondary light source of described secondary light source, obtain described brightness value transformational relation;
Calculate the ratio between measurement chromatic value and the chromatic value of described secondary light source of described secondary light source, obtain described chromatic value transformational relation;
The computing method of above-mentioned employing ratio realize simple, and measurement numerical value and the actual numerical value of bright colorimeter are divided by, and can obtain fast brightness value transformational relation and chromatic value transformational relation;
Therefore, as long as adopt the known light source of a true bright chromatic value as auxiliary reference light source, use this secondary light source of light tone degree instrumentation amount, the transformational relation between measured value and the actual value calculating, can realize calibrating for error of this bright colorimeter.
S13, measurement measured object, obtain the measurement brightness value of described measured object and measure chromatic value;
Use light tone degree instrumentation amount testee, bright colorimeter automatically shows the measurement brightness value of described measured object and measures chromatic value.
S14, calculate the brightness value of described measured object according to the measurement brightness value of described measured object and described brightness value transformational relation, calculate the chromatic value of described measured object according to the measurement chromatic value of described measured object and described chromatic value transformational relation;
Measuring measured object, obtain the measurement brightness value of described measured object and measure after chromatic value, can be according to the brightness value transformational relation obtaining in step S12 and chromatic value transformational relation, calculate intrinsic brilliance value and the actual chromatic value of described measured object, thereby realize the accurate measurement of bright colorimeter.
Accordingly, the present invention also provides a kind of calibration system of bright colorimeter, as shown in Figure 2, be the structural representation of this calibration system in a preferred embodiment, comprise secondary light source measurement module 21, the first computing module 22, measured object measurement module 23 and the second computing module 24;
Described secondary light source measurement module 21, for measuring default secondary light source, obtains the measurement brightness value of described secondary light source and measures chromatic value;
Select arbitrarily a light source as secondary light source, with this light source of light tone degree instrumentation amount, obtain the measurement brightness value of this secondary light source and measure chromatic value; Bright colorimeter may be longer due to service time, precise decreasing, and may there is error in the bright chromatic value of reality of the brightness value now measuring and chromatic value and this light source, the not necessarily actual value of this secondary light source.
Described the first computing module 22 is for calculating the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of described secondary light source and described secondary light source;
The reference light source that described secondary light source calibrates for error as this bright colorimeter, its brightness value and chromatic value are known; Bright colorimeter, measuring the measurement data obtaining after this secondary light source, calculates with the bright chromatic value of this secondary light source, can obtain transformational relation;
The brightness value of above-mentioned secondary light source and chromatic value, in a preferred embodiment, described secondary light source can adopt standard light source capsule, because standard light source capsule can provide standard sources, brightness value and chromatic value that this standard sources is dispatched from the factory are known, carry out Measurement and calibration with it as secondary light source, and the calculating of transformational relation is to adopt the error amount of light tone degree instrumentation amount and the actual value of standard sources, therefore result of calculation is accurate, can effectively improve measuring accuracy;
If do not adopt standard light source capsule, also can use any light source, light tone degree meter measures the measurement brightness value of this light source and measures chromatic value; And the true brightness value of this light source and chromatic value can select the bright colorimeter that a known precision is higher else and measure, the bright chromatic value that light tone degree meter higher known precision is measured, as benchmark, can calculate transformational relation equally;
The acquisition of transformational relation between measured value and actual value, can adopt multiple account form, sets up accurate transformational relation such as taking multiple measurements both relevance functions of acquisition;
In a preferred embodiment, described the first computing module 22 can comprise brightness value computing module and chromatic value computing module;
Described brightness value computing module, for calculating the ratio between measurement brightness value and the brightness value of described secondary light source of described secondary light source, obtains described brightness value transformational relation;
Described chromatic value computing module, for calculating the ratio between measurement chromatic value and the chromatic value of described secondary light source of described secondary light source, obtains described chromatic value transformational relation;
The computing method of above-mentioned employing ratio realize simple, and measurement numerical value and the actual numerical value of bright colorimeter are divided by, and can obtain fast brightness value transformational relation and chromatic value transformational relation;
Therefore, as long as adopt the known light source of a true bright chromatic value as auxiliary reference light source, use this secondary light source of light tone degree instrumentation amount, the transformational relation between measured value and the actual value calculating, can realize calibrating for error of this bright colorimeter.
Described measured object measurement module 23, for measuring measured object, obtains the measurement brightness value of described measured object and measures chromatic value;
Use light tone degree instrumentation amount testee, bright colorimeter automatically shows the measurement brightness value of described measured object and measures chromatic value.
Described the second computing module 24 is for calculate the brightness value of described measured object according to the measurement brightness value of described measured object and described brightness value transformational relation, calculates the chromatic value of described measured object according to the measurement chromatic value of described measured object and described chromatic value transformational relation;
Measuring measured object, obtain the measurement brightness value of described measured object and measure after chromatic value, can be according to the brightness value transformational relation and the chromatic value transformational relation that obtain in the first computing module 22, calculate intrinsic brilliance value and the actual chromatic value of described measured object, thereby realize the accurate measurement of bright colorimeter.
The calibration steps of above-mentioned bright colorimeter and system, obtain the measurement brightness value of described secondary light source and measure chromatic value by measuring secondary light source, then comparing with brightness value and the chromatic value of this standard sources, obtains both transformational relations; Obtaining the measurement brightness value of measured object and measuring after chromatic value, can calculate by described transformational relation brightness value and the chromatic value of measured object;
The present invention, by a secondary light source, obtains the transformational relation of bright colorimeter between error amount and actual value, and the measured value of this bright colorimeter can be revised according to this transformational relation, thereby greatly improves measuring accuracy;
Implementation procedure of the present invention is quick and convenient, and bright colorimeter carries out professional calibration and can realize high-precision measurement without delivering to correcting mechanism, has greatly improved work efficiency.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (4)
1. a calibration steps for bright colorimeter, is characterized in that, comprises the steps:
Measure default secondary light source, obtain the measurement brightness value of described secondary light source and measure chromatic value;
Calculate the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of described secondary light source and described secondary light source;
Measure measured object, obtain the measurement brightness value of described measured object and measure chromatic value;
Calculate the brightness value of described measured object according to the measurement brightness value of described measured object and described brightness value transformational relation, calculate the chromatic value of described measured object according to the measurement chromatic value of described measured object and described chromatic value transformational relation;
Wherein, the step of the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of the brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of the described secondary light source of described calculating and described secondary light source is:
Calculate the ratio between measurement brightness value and the brightness value of described secondary light source of described secondary light source, obtain described brightness value transformational relation;
Calculate the ratio between measurement chromatic value and the chromatic value of described secondary light source of described secondary light source, obtain described chromatic value transformational relation.
2. the calibration steps of bright colorimeter according to claim 1, is characterized in that, described secondary light source comprises standard light source capsule.
3. a calibration system for bright colorimeter, is characterized in that, comprises secondary light source measurement module, the first computing module, measured object measurement module and the second computing module;
Described secondary light source measurement module, for measuring default secondary light source, obtains the measurement brightness value of described secondary light source and measures chromatic value;
Described the first computing module is for calculating the chromatic value transformational relation between measurement chromatic value and the chromatic value of described secondary light source of brightness value transformational relation between measurement brightness value and the brightness value of described secondary light source of described secondary light source and described secondary light source;
Described measured object measurement module is used for measuring measured object, obtains the measurement brightness value of described measured object and measures chromatic value;
Described the second computing module is for calculate the brightness value of described measured object according to the measurement brightness value of described measured object and described brightness value transformational relation, calculates the chromatic value of described measured object according to the measurement chromatic value of described measured object and described chromatic value transformational relation;
Wherein, described the first computing module comprises brightness value computing module and chromatic value computing module;
Described brightness value computing module, for calculating the ratio between measurement brightness value and the brightness value of described secondary light source of described secondary light source, obtains described brightness value transformational relation;
Described chromatic value computing module, for calculating the ratio between measurement chromatic value and the chromatic value of described secondary light source of described secondary light source, obtains described chromatic value transformational relation.
4. the calibration system of bright colorimeter according to claim 3, is characterized in that, the described secondary light source in described secondary light source measurement module comprises standard light source capsule.
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| EP3021096B1 (en) * | 2014-11-11 | 2017-04-05 | Instrument Systems Optische Messtechnik Gmbh | Colorimeter calibration |
| CN104483017B (en) * | 2014-12-02 | 2018-07-10 | 科世达（上海）管理有限公司 | The error calibration modification method and device of optical sensors |
| CN111504465A (en) * | 2020-04-22 | 2020-08-07 | 上海精测半导体技术有限公司 | Colorimeter matching method, colorimeter correction method and system |
| CN111614916B (en) * | 2020-05-25 | 2022-11-25 | 上海精测半导体技术有限公司 | Colorimeter dark noise signal processing method and system |
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| CN101726361A (en) * | 2008-10-15 | 2010-06-09 | 大�电子株式会社 | Apparatus and method for measuring optical characteristics suitable for spectrum measurement |
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