A Multitask Framework for Graffiti-to-Image Translation

Recently, image-to-image translation models have achieved great success in terms of content consistency and visual fidelity. However, in most of these tasks, the inaccuracy of sketches and the high cost of fine semantic masks acquisition limit the large-scale use of image translation models. Therefore, we propose to use graffiti that combines the advantages of sketches and semantic masks as model input. Graffiti reflects the general content of an image using lines and color distinctions, with some unlabeled regions. However, due to the large number of unknown areas in the graffiti, the generated results may be blurred, resulting in poor visual effects. To address these challenges, this paper proposes a multi-task framework that can predict unknown regions by learning semantic mask from graffiti, thereby improving the quality of generated real scene images. Furthermore, by introducing an edge activation module, which utilizes semantic and edge information to optimize the object boundaries of the generated images, the details of the generated images can be improved. Experiments on the Cityscapes dataset demonstrate that our multi-task framework achieves competitive performance on graffiti-based image generation task.