Detectron2 is Facebook AI Research's next generation library that provides state-of-the-art detection and segmentation algorithms. It supports a number of computer vision research projects and production applications in Facebook. Please find the details on its official link at https://github.com/facebookresearch/detectron2

I used LVIS dataset at https://www.lvisdataset.org/ that has already trained models for shirt and clothes images. Other datasets are also available at COCO. I used a pre-trained model named "X101-FPN". This model can segment different objects including fashion features such as shirt, jean, etc.

See Getting Started with Detectron2, and the Colab Notebook at https://colab.research.google.com/drive/16jcaJoc6bCFAQ96jDe2HwtXj7BMD_-m5 to learn about basic usage.