Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: LVIS Challenge Track Technical Report 1st Place Solution: Distribution
  Balanced and Boundary Refinement for Large Vocabulary Instance Segmentation   This report introduces the technical details of the team FuXi-Fresher for
LVIS Challenge 2021. Our method focuses on the problem in following two
aspects: the long-tail distribution and the segmentation quality of mask and
boundary. Based on the advanced HTC instance segmentation algorithm, we connect
transformer backbone(Swin-L) through composite connections inspired by CBNetv2
to enhance the baseline results. To alleviate the problem of long-tail
distribution, we design a Distribution Balanced method which includes dataset
balanced and loss function balaced modules. Further, we use a Mask and Boundary
Refinement method composed with mask scoring and refine-mask algorithms to
improve the segmentation quality. In addition, we are pleasantly surprised to
find that early stopping combined with EMA method can achieve a great
improvement. Finally, by using multi-scale testing and increasing the upper
limit of the number of objects detected per image, we achieved more than 45.4%
boundary AP on the val set of LVIS Challenge 2021. On the test data of LVIS
Challenge 2021, we rank 1st and achieve 48.1% AP. Notably, our APr 47.5% is
very closed to the APf 48.0%.

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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: stat