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Paper · 1906.04423 · 2019

NAS-FCOS: Fast Neural Architecture Search for Object Detection

arXiv · PDF · Open in the Atlas

Code that ran

We lifted 7 functions out of this paper's own repositories and ran 6 of them in a sandbox. "Ran" means the function executed on a synthesized input and returned a value. It is not a reproduction of the paper's results.

RepositoryRoleRan
Lausannen/NAS-FCOS pwc_unofficial 6 of 7
FunctionStatusWhere it lives
compute_params Ran Lausannen/NAS-FCOS/maskrcnn_benchmark/nas/helpers/utils.py
code served (permissive licence) · get_code("4b7b9c0a067a58b6")
conv1x1 Ran Lausannen/NAS-FCOS/maskrcnn_benchmark/nas/modeling/layer_factory.py
code served (permissive licence) · get_code("91a91c0edd5005d4")
conv3x3 Ran Lausannen/NAS-FCOS/maskrcnn_benchmark/nas/modeling/layer_factory.py
code served (permissive licence) · get_code("44528dc0396b98a2")
conv_bn Ran Lausannen/NAS-FCOS/maskrcnn_benchmark/nas/modeling/layer_factory.py
code served (permissive licence) · get_code("cfd0138367178ace")
deprocess_img Ran Lausannen/NAS-FCOS/maskrcnn_benchmark/nas/helpers/utils.py
code served (permissive licence) · get_code("cf7a8fe1ae8b87b8")
load_ckpt Ran Lausannen/NAS-FCOS/maskrcnn_benchmark/nas/helpers/utils.py
code served (permissive licence) · get_code("2d70cc16e9c12926")
interpolate Not yet run Lausannen/NAS-FCOS/maskrcnn_benchmark/layers/misc.py
code served (permissive licence) · get_code("2902bf4410253ff7")

Repositories linked to this paper

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Abstract

The success of deep neural networks relies on significant architecture engineering. Recently neural architecture search (NAS) has emerged as a promise to greatly reduce manual effort in network design by automatically searching for optimal architectures, although typically such algorithms need an excessive amount of computational resources, e.g., a few thousand GPU-days. To date, on challenging vision tasks such as object detection, NAS, especially fast versions of NAS, is less studied. Here we propose to search for the decoder structure of object detectors with search efficiency being taken into consideration. To be more specific, we aim to efficiently search for the feature pyramid network (FPN) as well as the prediction head of a simple anchor-free object detector, namely FCOS, using a tailored reinforcement learning paradigm. With carefully designed search space, search algorithms and strategies for evaluating network quality, we are able to efficiently search a top-performing detection architecture within 4 days using 8 V100 GPUs. The discovered architecture surpasses state-of-the-art object detection models (such as Faster R-CNN, RetinaNet and FCOS) by 1.5 to 3.5 points in AP on the COCO dataset, with comparable computation complexity and memory footprint, demonstrating the efficacy of the proposed NAS for object detection.

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