React: Reference-Based Anime Colorization Transformer

The animation industry is expanding, yet coloring frames, particularly sketch coloring, remains labor-intensive. Automating anime sketch colorization is challenging due to sparse details and frame variations. Existing methods struggle with color bleeding and misapplication. We present the Reference-based Anime Colorization Transformer (ReACT), which uses two reference images to transfer color to sketches. ReACT incorporates a density-aware distance field map to improve sketch semantics and preserve details, while a Transformer leverages multi-source attention for accurate color alignment. Experimental results demonstrate that ReACT delivers high-quality, continuous colorization, outperforming existing methods.