Method and device for correcting image color deviation

Abstract

The invention discloses a method and a device for correcting an image color deviation. The method comprises the following steps of: constructing an initial color correction matrix based on image measurement data and a standard color card; comparing the corrected color value with a standard color value to obtain a color difference value and a color deviation angle after performing color space conversion on the image measurement data to obtain a corrected color value; according to the color difference weight and the color deviation angle weight of the standard color value, using the initial color correction matrix to calculate the plurality of color difference values and the plurality of color deviation angles, obtaining the minimum value of the color difference value and the maximum value of the color deviation angle, forming the optimal color correction matrix, and multiplying the optimal color correction matrix by the image data to obtain corrected image data. Compared to the method of performing color calibration by calculating the deviation in the distance between the measured color and the standard color, the method for correcting an image color deviation performs the image color correction more accurately by obtaining the deviation in color distance and orientation.

Description

Technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for correcting image color deviation. Background technique [0002] In order to make the color design and reproduction more accurate, allow the color conversion and correction to formulate appropriate adjustment scales or ratios, and reduce the reproduction error caused by the uneven space, in the prior art, CIE1976LAB is usually used to evaluate the color. So as to correct the color deviation of the image. However, in the LAB color space described by CIE1976LAB, the brightness difference, chromaticity difference, and total color difference between the measured color and the standard color are only calculated for the deviation in distance, and the deviation of the color orientation of the measured color and the standard color is not calculated, so , When the existing technology is used for color calibration, the result obtained is still not accura...

AI Technical Summary

Problems solved by technology

However, in the LAB color space described by CIE1976LAB, the lightness difference, chromaticity difference, and total color difference between the measured color and the standard color only calculate the distance deviation, and do not calculate the color orientation deviation between the measured color and the standard color, so , when using existing technology for color calibration, the results obtained are still not accurate enough

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