A Spatial Consistency Correction Method for Multispectral Imaging System

Abstract

The invention discloses a spatial consistency correcting method of a multi-spectral imaging system. The method comprises the following steps: measuring response values of a series of gray paper at different positions of the objective table of the multi-spectral imaging system, meanwhile, measuring a color block response value used for reflectivity reconstruction in the multi-spectral imaging system, and by means of a polynomial regression model, mapping the response values of the different gray paper at different positions to the response values of the central position by using the position information as independent variables, and meanwhile, mapping the response values of the color block used for reflectivity reconstruction to the target value by taking the position information as an independent variable. The spatial consistency precision requirement and the reflectivity reconstruction precision requirement in the multi-spectral imaging system are met at the same time, so that after spatial consistency correction is carried out, the spatial consistency chromatic aberration of the system is greatly reduced, and meanwhile, the chromatic aberration mean value of the reflectivity reconstruction is also reduced.

Description

technical field [0001] The present invention relates to multi-spectral imaging technology, in particular to a spatial consistency correction method for a multi-spectral imaging system, which can reduce the average value of reflectance reconstruction color difference under the condition of greatly reducing the spatial consistency color difference of the system. Background technique [0002] When the same beam of visible light is irradiated on objects of different colors, the objects reflect different wavelengths of visible light in different degrees, which makes the stimulation of the retina of the human eye different, thus forming the subjective perception of different colors by the human eye. Therefore, the essence of object color measurement is to measure the spectral reflectance of the object. [0003] The multi-spectral imaging system is a device that can measure the color and reflectance of objects. Its working principle is to irradiate uniform light on the object on th...

AI Technical Summary

Problems solved by technology

Although this method can improve the spatial consistency of the system to a certain extent, after using the method to correct the multispectral imaging system, the improvement of the spatial consistency of the system is still limited, and this method will affect the reflectance reconstruction chromatic aberration to a certain extent , does not guarantee that the reflectance reconstruction chromatic aberration is reduced

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