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UP-NeRF: Unconstrained Pose-Prior-Free

Neural Radiance Fields

Injae Kim*, Minhyuk Choi*, Hyunwoo J. Kim

Korea University

MLV Lab

Korea University

MLV Lab

NeurIPS 2023

2 of 20

Neural Radiance Field

Korea University

MLV Lab

NeurIPS 2023

3 of 20

Unposed-NeRF

BARF (ICCV23)

NoPe-NeRF (CVPR23)

Korea University

MLV Lab

NeurIPS 2023

4 of 20

Unconstrained Images

Phototourism dataset

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

5 of 20

Unconstrained Images

Phototourism dataset

LLFF dataset

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

6 of 20

Unconstrained Images

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

7 of 20

Unconstrained Images

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

8 of 20

UP-NeRF

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Candidate Head

Korea University

MLV Lab

NeurIPS 2023

9 of 20

Candidate Head

Given image

Red frustum: estimated pose

Black frustum: ground-truth poses

Given image

Entire scene

Korea University

MLV Lab

NeurIPS 2023

10 of 20

Candidate Head

Korea University

MLV Lab

NeurIPS 2023

11 of 20

Candidate Head

Candidate representation

Shared representation

Korea University

MLV Lab

NeurIPS 2023

12 of 20

Candidate Head

Feature & Image

Pose

GT Image

GT feature

Without candidate

UP-NeRF

Korea University

MLV Lab

NeurIPS 2023

13 of 20

Feature Surrogate

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Feature Surrogate

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

14 of 20

Feature Surrogate

Korea University

MLV Lab

NeurIPS 2023

15 of 20

UP-NeRF

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

16 of 20

Transient-aware Depth Prior

Korea University

MLV Lab

NeurIPS 2023

17 of 20

Isolated Transient Network

The gradient of transient occluder does not flow into learnable camera pose parameters.

Korea University

MLV Lab

NeurIPS 2023

18 of 20

Conclusion

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

  1. Complex Camera Poses
  2. Difference appearances
  3. Transient Occluders

Challenges

Korea University

MLV Lab

NeurIPS 2023

19 of 20

Conclusion

Feature & Image

Pose

GT Image

GT feature

BARF

UP-NeRF

Colored frustum: estimated pose

Black frustum: ground-truth poses

Korea University

MLV Lab

NeurIPS 2023

20 of 20

https://mlvlab.github.io/upnerf

Korea University

MLV Lab

NeurIPS 2023