A Color Measurement Benchmark Determination Method
A technology for measuring benchmarks and determining methods, which can be used in color/spectral property measurement, measuring devices, optical testing flaws/defects, etc., and can solve problems such as sacrificing local accuracy
Active Publication Date: 2022-03-01
BEIJING LUSTER LIGHTTECH
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[0004] In order to solve the above technical problems, an embodiment of the present invention provides a method for determining a color measurement reference, which is used to solve the problem in the prior art that the local accuracy is sacrificed in order to take into account the overall color, so that the accuracy measurement of a specific color area can be significantly improved question
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[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0054] In some processes described in the specification and claims of the present invention and the above-mentioned drawings, a plurality of operations appearing in a specific order are contained, but it should be clearly understood that these operations may not be performed in the order in which they appear herein Execution or parallel execution, the serial numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. Additionally, these processes can include more or fewer operations, and these operations can be performed sequentially or in parallel. It should be n...
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An embodiment of the present invention provides a method for determining a color measurement benchmark, comprising the following steps: traversing each color block in the preset color gamut area, so that each of the first lab values is consistent with all color gamut lookup tables. Comparing any second lab value, when the two satisfy the first preset formula, determine the second rgb value corresponding to the second lab value in the entire color gamut lookup table at this time; based on the second rgb value, according to the first mapping relationship, the first lab value corresponding to the second rgb value is obtained; the first lab value corresponding to the second rgb value is used to replace the described all color gamut lookup tables The second lab value corresponding to the second rgb value. It is used to solve the problem of sacrificing local precision in order to take into account the overall color in the prior art, so that the precision measurement problem of a specific color area can be significantly improved.
Description
technical field [0001] The invention relates to the field of color measurement, in particular to a method for determining a color measurement reference. Background technique [0002] In the packaging and printing industry, color is an important part of product quality. Inaccurate product color measurement or inaccurate measurement of color difference at different positions will cause defective or waste products and bring economic losses to the enterprise. Therefore, a fast and effective color measurement method is needed to accurately measure the color of products and avoid unnecessary economic losses for enterprises. [0003] In the current color measurement method, the mapping relationship between the RGB color space and the Lab color space is established by using the polynomial regression method, and the color can be converted to the Lab color space that has nothing to do with the device, so as to effectively measure the color. The mapping relationship established by thi...
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IPC IPC(8): G01N21/25G01N21/93
CPCG01N21/255G01N21/93G01N2201/13
Inventor 杨柳青姚毅张腾飞
Owner BEIJING LUSTER LIGHTTECH