# SketchyGAN: Towards Diverse and Realistic Sketch to Image Synthesis

**Authors:** Wengling Chen, James Hays  
**arXiv:** [1801.02753](https://arxiv.org/abs/1801.02753)  
**Date:** 2018-01-09  
**Summary page:** https://www.summarizepaper.com/fr/paper/1801.02753v2/

## Abstract

Synthesizing realistic images from human drawn sketches is a challenging problem in computer graphics and vision. Existing approaches either need exact edge maps, or rely on retrieval of existing photographs. In this work, we propose a novel Generative Adversarial Network (GAN) approach that synthesizes plausible images from 50 categories including motorcycles, horses and couches. We demonstrate a data augmentation technique for sketches which is fully automatic, and we show that the augmented data is helpful to our task. We introduce a new network building block suitable for both the generator and discriminator which improves the information flow by injecting the input image at multiple scales. Compared to state-of-the-art image translation methods, our approach generates more realistic images and achieves significantly higher Inception Scores.