arXiv:2512.14140v2 Announce Type: replace 
Abstract: Sketch editing requires jointly handling high-level semantic changes and precise local redrawing, a combination that is particularly challenging for sparse, style-sensitive line art. Unlike natural images, sketches rely on minimal visual cues, making it difficult for existing methods to reconcile global semantic modifications with fine-grained structural control while preserving overall coherence. We present SketchAssist, an interactive sketch assistant that unifies instruction-guided editing with line-guided region redrawing, enabling efficient and controllable sketch manipulation while preserving overall composition. To support this task, we introduce a controllable data generation pipeline that constructs structured edit sequences with precise attribute variations and maintains structural alignment across multi-step modifications, while expanding stylistic diversity via style-preserving transformations. Building on this data, SketchAssist adopts a unified framework based on DiT, using a multi-channel input representation to encode sketches, masks, and guidance signals within a single interface. To further handle different editing modes, we integrate a Task-guided Mixture-of-Experts (T-MoE) into LoRA layers, enabling adaptive control over semantic and structural guidance. Extensive experiments demonstrate state-of-the-art performance on both tasks, achieving strong instruction adherence and improved structural and style consistency compared to recent methods. Together, our method provide a practical and controllable solution for sketch editing.

يمثل الإطلاق الأخير لـ SketchAssist تقدمًا كبيرًا في مجال تحرير الرسومات، حيث يتناول التحديات المتعلقة بدمج التغييرات الدلالية عالية المستوى مع إعادة الرسم المحلي الدقيق، خاصة في فن الخطوط النادرة. يعزز هذا المساعد التفاعلي الكفاءة والتحكم في معالجة الرسومات مع الحفاظ على التركيب العام.

La reciente introducción de SketchAssist representa un avance significativo en el campo de la edición de bocetos, abordando los desafíos de combinar cambios semánticos de alto nivel con redibujos locales precisos, especialmente en el arte lineal escaso. Este asistente interactivo mejora la eficiencia y el control de la manipulación de bocetos mientras mantiene la composición general.

La récente introduction de SketchAssist marque une avancée significative dans le domaine de l'édition de croquis, en abordant les défis de la combinaison des modifications sémantiques de haut niveau avec le redessin local précis, en particulier dans l'art linéaire sparse. Cet assistant interactif améliore l'efficacité et le contrôle de la manipulation des croquis tout en maintenant la composition globale.

The recent introduction of SketchAssist marks a significant advancement in the field of sketch editing, addressing the challenges of combining high-level semantic changes with precise local redrawing, particularly in sparse line art. This interactive assistant enhances the efficiency and control of sketch manipulation while maintaining overall composition.