이미지 재조명 기반 빛바랜 색상을 이용한 회화적 렌더링 = Painterly Rendering with Image Relighting-Based Faded Color

다국어 초록 (Multilingual Abstract)

This paper proposes a painterly rendering method that reflects 2D image relighting and color variation to visualize the effects of light on oil paintings. The proposed method relights a 2D image and uses the resulting shading values as weights to reflect corresponding changes in color. For the relighting process, the 2D image is approximated as a 3D surface, and normals are estimated. The angle between these normals and the specified light source is used to compute shading values. Users can freely set the position of the light source, and the resulting color changes under varying lighting conditions are derived with reference to prior research. Unlike conventional local-based painterly rendering methods that produce flat and overly simplified results, the proposed approach effectively captures faded colors and a sense of depth through image relighting. This allows for vivid, three-dimensional representations that closely resemble real oil paintings. Ultimately, the method contributes to the expressive depiction, prediction, and restoration of color changes in cultural and artistic works.