“CLIPasso: Semantically-Aware Abstract Object Sketching” by Vinker, Pajouheshgar, Bo, Bachmann, Bermano, et al. …
Conference:
- SIGGRAPH 2022
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More from SIGGRAPH 2022:
Type(s):
Title:
- CLIPasso: Semantically-Aware Abstract Object Sketching
Program Title:
- Labs Demo
Presenter(s):
Description:
Abstraction is at the heart of sketching due to the simple and minimal nature of line drawings. Abstraction entails identifying the essential visual properties of an object or scene, which requires semantic understanding and prior knowledge of high-level concepts. Abstract depictions are therefore challenging for artists, and even more so for machines. We present CLIPasso, an object sketching method that can achieve different levels of abstraction, guided by geometric and semantic simplifications. While sketch generation methods often rely on explicit sketch datasets for training, we utilize the remarkable ability of CLIP (Contrastive-Language-Image-Pretraining) to distill semantic concepts from sketches and images alike. We define a sketch as a set of Bézier curves and use a differentiable rasterizer to optimize the parameters of the curves directly with respect to a CLIP-based perceptual loss. The abstraction degree is controlled by varying the number of strokes. The generated sketches demonstrate multiple levels of abstraction while maintaining recognizability, underlying structure, and essential visual components of the subject drawn.
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