Grey balance adjusting in image processing using gradation trajectories

Grey balance adjusting is one of the key moments in digital image processing. In the work, an experimental attempt was made to adapt the ideas about the Maxwell color triangle (additive color synthesis) to the patterns of autotypic color synthesis. To adjust the grey balance, it is suggested not to use colorants of autotypic synthesis (CMYK), but their double overlays (RGB). As double overlays, it is proposed to use geodesic lines on the gradation surfaces of the corresponding double overlays. All geometric objects (points, lines, and surfaces) are considered in the CIE Lab space. The metric of the space is determined by the magnitude of the color difference CIE dE. Experimental verification of the approach and discussion of the results were carried out.