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DrawingProcess

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[์„ธ๋ฏธ๋‚˜] AIํ”„๋ Œ์ฆˆ: NeRF(Neural Radiance Field) ํŠธ๋žœ๋“œ์™€ ์†๋„ ๋ฐœ์ „ ๋™ํ–ฅ (LG์ „์ž ๊น€๋„์—ฐ)
IT Trends/Conference, Faire (Experience)

[์„ธ๋ฏธ๋‚˜] AIํ”„๋ Œ์ฆˆ: NeRF(Neural Radiance Field) ํŠธ๋žœ๋“œ์™€ ์†๋„ ๋ฐœ์ „ ๋™ํ–ฅ (LG์ „์ž ๊น€๋„์—ฐ)

2024. 1. 8. 15:11
๋ฐ˜์‘ํ˜•
๐Ÿ’ก ๋ณธ ๋ฌธ์„œ๋Š” 'NeRF(Neural Radiance Field) ํŠธ๋žœ๋“œ์™€ ์†๋„ ๋ฐœ์ „ ๋™ํ–ฅ (LG์ „์ž ๊น€๋„์—ฐ)' ๊ฐ•์—ฐ์„ ๋“ฃ๊ณ  ์ •๋ฆฌํ•ด๋†“์€ ๊ธ€์ž…๋‹ˆ๋‹ค.

1. NeRF & ์‘์šฉ ์—ฐ๊ตฌ ๋ถ„์•ผ

NeRF

  • Radiance Field: ๋ฐ”๋ผ๋ณด๋Š” ๊ฐ๋„๋งˆ๋‹ค ๋‹ค๋ฅธ ๋น›์„ ๋‚ด๋Š” Field
  • Neural Radiance Field: ๋ฐ”๋ผ๋ณด๋Š” ๊ฐ๋„๋งˆ๋‹ค ๋‹ค๋ฅธ ๋น›์„ ๋‚ด๋Š” Field๋ฅผ Neural Network๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ƒ์„ฑ ๋ชจ๋ธ
  • ํ•ด๊ฒฐํ•˜๋ ค๋Š” ๋ฌธ์ œ: Novel View Systhesis -> ๋‹ค์–‘ํ•œ ์นด๋ฉ”๋ผ ํฌ์ฆˆ์—์„œ ํ•™์Šต๋˜์ง€ ์•Š์€ Pose์—์„œ์˜ ์ด๋ฏธ์ง€ ํ•ฉ์„ฑ
  • https://www.matthewtancik.com/nerf

์—ฐ๊ตฌ ๋ถ„์•ผ

Base ์—ฐ๊ตฌ ๋ถ„์•ผ

  • Image Quality ํ–ฅ์ƒ: ํ•ด์ƒ๋„, ์นด๋ฉ”๋ผ ๊ฑฐ๋ฆฌ
  • Time ๋‹จ์ถ•: Train & Randering ์†๋„
  • Input ์ œ์•ฝ ์ œ๊ฑฐ: ์ ์€ Image ์ˆ˜, Camera Pose ์œ ๋ฌด

์‘์šฉ ์—ฐ๊ตฌ ๋ถ„์•ผ

  • 3D Reconstruction
    • NeRF in the Wild(CVPR 2021): ๊ด€๊ด‘์ง€์—์„œ ์ฐ์€ ์‚ฌ์ง„๋“ค์„ ๋ฐ”ํƒ•์œผ๋กœ 3D Reconstruction
    • PF LRM: Pose Free Large Reconstruction Model(arXiv 2023): Pose๊ฐ€ ์ฃผ์–ด์ง€์ง€ ์•Š๋”๋ผ๋„ ์„ธ์žฅ์˜ ์‚ฌ์ง„๋งŒ์œผ๋กœ 3D Reconstruction
    • SMERF: Streamable Memory Efficiant Radiance Fields(arXiv 2023): ์ง‘์„ 3D Reconstructionํ•˜์—ฌ ์›€์ง์ด๋ฉฐ ๊ตฌ๊ฒฝํ•  ์ˆ˜ ์žˆ๋„๋ก ๊ตฌ์„ฑ
  • 3D Reconstruction(Large Scene)
    • F2-NeRF (CVPR 2023): ๋“œ๋ก ์œผ๋กœ ๋„์‹œ๋ฅผ 3D Reconstruction
    • MatrixCity (ICCV 2023): ์ฐจ๋Ÿ‰์˜ ๋ธ”๋ž™๋ฐ•์Šค ์˜์ƒ์œผ๋กœ 3D Reconstruction
  • Relighting
    • ShadowNeus (CVPR 2023)
    • Relightable Gaussian Codec Avatars (arXiv 2023): VR ๊ธฐ๊ธฐ ์œ„์—์„œ ์–ผ๊ตด์„ ๋ชจ๋ธ๋ง ํ›„ Relightingํ•˜์—ฌ ์กฐ๋ช… ๋ณ€ํ™”
  • Scene Editing
    • NeRFShop (I3D 2023): Scene์„ 3d Reconstructionํ•œ ํ›„ ์‚ฌ๋ฌผ์„ ์„ ํƒํ•˜์—ฌ ์ด๋™ & ํฌ๊ธฐ ์กฐ์ •ํ•  ์ˆ˜ ์žˆ๋„๋ก
    • NeRF-Art (TVCG 2023), Blending-NeRF (ICCV 2023): ๋น„๋””์˜ค๋ฅผ ํŠน์ • ๋ช…ํ™” style๋กœ renderingํ•˜๋Š” ๋ชจ๋ธ
  • Camera Pose Estimation
  • Dynamic Scene Randering
  • Text to 3D: DreamFusion -> Magic3D -> Fantasia3D -> ProlificDreamer -> DreamCraft3D
  • Image to 3D: Zero-1-to-3 -> Shap-E -> One-2-3-45 -> Dream Gaussian -> One-2-3-45++ 

๊ธฐํƒ€ ์—ฐ๊ตฌ

  • ๊ฐ€์ƒ์˜ Mirror ๋ฐฐ์น˜: Mirror-NeRF(ACM Multimedia 2023)
  • 3D Segmentation Anything: Segment Anything in 3D with NeRFs (NeurIPS 2023)
  • ๋™๊ณต์— ๋น„์นœ ์‚ฌ๋ฌผ ๋ Œ๋”๋ง: Seeing the World through Your Eyes (arXiv 2023)

์ฐธ๊ณ 

  • [๋…ผ๋ฌธ ์ •๋ฆฌ] NeRF ๊ฐœ์„  ๋ฐฉํ–ฅ ๋ฐ ๊ธฐ์ˆ  ๋™ํ–ฅ: https://xoft.tistory.com/5

2. NeRF ๊ธฐ์ˆ  

Algorithm Key Words?

Positional Encoding / Neural Network / Volume Randering

problem? ํ€„๋ฆฌํ‹ฐ / ์†๋„/ ์ž…๋ ฅ ์กฐ๊ฑด

์—ฐ์‚ฐ ์†๋„์˜ ๋ฐœ์ „

1) SH-based NeRF

2) Grid-based NeRF

  • Trilinear interpolation(์ƒ‰์ƒ ๊ฒฐ์ •): Scene์„ ๊ณ ์ •๋œ Voxel ์ˆ˜์˜ Grid๋กœ ๊ตฌ์„ฑํ•˜๊ณ , ์ฃผ๋ณ€ Voxel์˜ ๊ฐ’๋“ค๋กœ ๋ณด๊ฐ„
  • Total Variance(TV) Loss: ์ธ์ ‘ํ•œ voxel๋“ค ๊ฐ’์˜ ๋ณ€ํ™”๋Ÿ‰ ํฌ๊ธฐ๋กœ Loss๋ฅผ ์„ค๊ณ„ํ•ด์„œ Regularization

Multi-resolution Hash Table: ์—ฌ๋Ÿฌ ์Šค์ผ€์ผ์˜ ๊ทธ๋ฆฌ๋“œ๋ฅผ ๊ตฌ์„ฑํ•˜๊ณ , Voxel๊ฐ’์„ Hash Table๋กœ ๊ตฌ์„ฑ

3) Tensor-based NeRF

4) 3D Gaussian Splatting

๋ฐ˜์‘ํ˜•
์ €์ž‘์žํ‘œ์‹œ ๋น„์˜๋ฆฌ ๋ณ€๊ฒฝ๊ธˆ์ง€ (์ƒˆ์ฐฝ์—ด๋ฆผ)

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