transformers pytorch upernet image-segmentation dataset:EduardoPacheco/FoodSeg103 arxiv:2105.05409 arxiv:1901.02446 arxiv:1811.11721 arxiv:2102.12122 arxiv:2012.15840 arxiv:2103.14030 arxiv:1807.10221 license:apache-2.0 endpoints_compatible region:us