v0.5

• Add “LazyConfig” system, an alternative python-based config system with more flexible syntax and no predefined structures.
• Add improved Mask R-CNN baselines to model zoo using large scale jittering and longer training. See blog and configs.
• Add backbone wrapper and detector wrapper for models in mmdetection. This allows training and evaluation of these models in detectron2. See an example config that trains a mmdet’s Mask R-CNN
• Code release for Implicit PointRend & PointSup.
• Code release for Rethinking Batch in BatchNorm.
• Add support for RegNet backbones. Example.
• Integration of fvcore’s tracing-based advanced flop counter.
• New features in DensePose CSE: see its release notes for more details.

Pre-built Linux binaries are available for the following environment:

CUDA	torch 1.9	torch 1.8	torch 1.7
11.1	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu111/torch1.9/index.html	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu111/torch1.8/index.html
11.0			install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu110/torch1.7/index.html
10.2	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu102/torch1.9/index.html	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu102/torch1.8/index.html	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu102/torch1.7/index.html
10.1		install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/torch1.8/index.html	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/torch1.7/index.html
9.2			install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cu92/torch1.7/index.html
cpu	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.9/index.html	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.8/index.html	install python -m pip install detectron2==0.5 -f \ https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.7/index.html