Cited by 1393D Shape Modeling and AnalysisHuman Pose and Action RecognitionFace recognition and analysis

Three-D Safari: Learning to Estimate Zebra Pose, Shape, and Texture From Images “In the Wild”

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Zuffi, Silvia, Kanazawa, Angjoo, Berger-Wolf, Tanya, Black, Michael·2019·2019 IEEE/CVF International Conference on Computer Vision (ICCV)

Abstract

We present the first method to perform automatic 3D pose, shape and texture capture of animals from images acquired in-the-wild. In particular, we focus on the problem of capturing 3D information about Grevy's zebras from a collection of images. The Grevy's zebra is one of the most endangered species in Africa, with only a few thousand individuals left. Capturing the shape and pose of these animals can provide biologists and conservationists with information about animal health and behavior. In contrast to research on human pose, shape and texture estimation, training data for endangered species is limited, the animals are in complex natural scenes with occlusion, they are naturally camouflaged, travel in herds, and look similar to each other. To overcome these challenges, we integrate the recent SMAL animal model into a network-based regression pipeline, which we train end-to-end on synthetically generated images with pose, shape, and background variation. Going beyond state-of-the-art methods for human shape and pose estimation, our method learns a shape space for zebras during training. Learning such a shape space from images using only a photometric loss is novel, and the approach can be used to learn shape in other settings with limited 3D supervision. Moreover, we couple 3D pose and shape prediction with the task of texture synthesis, obtaining a full texture map of the animal from a single image. We show that the predicted texture map allows a novel per-instance unsupervised optimization over the network features. This method, SMALST (SMAL with learned Shape and Texture) goes beyond previous work, which assumed manual keypoints and/or segmentation, to regress directly from pixels to 3D animal shape, pose and texture.

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Crossref · 10.1109/iccv.2019.00546

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  • In ref. 110, the SMAL model was used in a DL approach to predict 3D shape and pose of the Grevy's zebra from images.

    “In ref. 110, the SMAL model has been used in a DL approach to predict 3D shape and pose of the Grevy’s zebra from images.”

    From Perspectives in machine learning for wildlife conservation (2022) · cites this paper as [110]

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Research works printed but not linked: 2

  1. Kaiming He, Georgia Gkioxari, Piotr Dollár, and Ross Gir- shick. Mask R-CNN. In Proceedings of the International Conference on Computer Vision (ICCV), 2017. 3
  2. Hiroharu Kato, Yoshitaka Ushiku, and Tatsuya Harada. Neu- ral 3d mesh renderer. In 2018 IEEE Conference on Computer Vision and Pattern Recognition, CVPR 2018, Salt Lake City, UT, USA, June 18-22, 2018, 2018. 5

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Authors
Zuffi, S., Kanazawa, A., Berger-Wolf, T., & Black, M.
Affiliations
  • Istituto di Matematica Applicata e Tecnologie Informatiche (IT)
  • University of California, Berkeley (US)
  • University of Illinois Chicago (US)
  • Max Planck Society (DE)
Venue
2019 IEEE/CVF International Conference on Computer Vision (ICCV)
Publisher
IEEE
Published
2019-10
Pages
5358-5367
OpenAlex
W2969812964
Cited by
139
References
36
Citations by year
2026: 9 · 2025: 10 · 2024: 25 · 2023: 23 · 2022: 22 · 2021: 29 · 2020: 19 · 2019: 2
FWCI
20.93
Type
conference paper
Language
en
Open access
Locations
  • IEEE/CVF International Conference on Computer Vision (ICCV) (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (1514126)
  • Nvidia
Topics
  • Physical Sciences › Engineering › Computational Mechanics › 3D Shape Modeling and Analysis
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Human Pose and Action Recognition
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Face recognition and analysis
Keywords
Grevy's zebra, in-the-wild images, threatened species, occlusion, camouflage, photometric loss

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