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High precision color correction processing method and high precision color correction processing device
High precision color correction processing method and high precision color correction processing device
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机译：高精度色彩校正处理方法和高精度色彩校正处理装置
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摘要
PROBLEM TO BE SOLVED: To select and determine a color correction model having an appropriate degree of freedom of parameters while taking into consideration noise caused by image pickup of a camera and image compression, and color matching processing in consideration of white balance using the color correction model It is an object of the present invention to propose a high precision color correction processing method and a high precision color correction processing apparatus for performing the above. A three-dimensional geometric transformation in a three-dimensional RGB color space is estimated by a statistically optimal method in consideration of a covariance matrix of errors with respect to RGB data extracted from an image obtained by capturing a color chart. Also, in order to realize exact white balance correction, post correction is performed on the estimation result of the geometrical transformation so that the color chart white level becomes an ideal specified white level. From the estimation results of geometric transformation models with different degrees of freedom, geometric model selection determines the best model that balances the complexity and fit of the models. Then, color correction processing by the selected three-dimensional geometric transformation is calculated by three-dimensional lookup table (3DLUT) interpolation. [Selected figure] Figure 1
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