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ColorfulCurves extracts a hue-chroma palette from your image and gives each palette color its own tone curve. You place constraints; it finds the sparsest change to the palette and curves that satisfies all of them. Constraints can be added and removed in any order.
Based on ColorfulCurves: Palette-Aware Lightness Control and Color Editing via Sparse Optimization (Chao, Klein, Tan, Echevarria, Gingold; ACM TOG / SIGGRAPH 2023).