Yellowfin hind · fish1

Cephalopholis hemistiktos · Serranidae · 68% · medium reconstructed model: fair
Reviewer: plain dark body, fins smeared; aligns with the crops

Where it comes from

Original video (longest visit, 48:45-49:05), the selected fish boxed
Tracking: real frame + crop + 3D render at the estimated pose, species overlay

3D and 4D model

loading 3D gaussians…
Interactive canonical 3D gaussians (drag to orbit, scroll to zoom). This is the rest pose shared by every frame; the 4D part is the per-frame bending / tail motion shown on the right.
4D: canonical model replaying the learned body bending and tail beat
3D turntable of the canonical model

Poster

poster

Species

Yellowfin hind Cephalopholis hemistiktos Serranidae
68.3%
Redmouth grouper Aethaloperca rogaa Serranidae
13.2%
Slingjaw wrasse Epibulus insidiator Labridae
3.0%
Viridescent parrotfish Calotomus viridescens Scaridae
2.6%
Broom filefish Amanses scopas Monacanthidae
1.6%

Family: Serranidae 84%, Labridae 5%, Scaridae 4% · agreement across crops 72% · 64 crops · bioclip-2.5 (hf-hub:imageomics/bioclip-2.5-vith14, open_clip, zero-shot)

Crops used for the species vote

Data and reconstruction

window48:00 – 58:00
visits10: 48:17-49:20, 49:58-50:47, 50:49-50:50, 50:55-51:05, 52:54-52:57, 53:00-53:02, 53:35-54:06, 54:10-54:19, 57:00-57:35, 57:48-58:00
frames (10 fps) detected / kept2044 / 1728
valid poses (10 fps)1911
frames with background plate1350
median size140.0 px
30 fps frames / valid poses721 / 715
method4D GS, fins + bending + tail (30 fps)
model shownv1 (gs_final)
iterations4000
gaussians24353
training time23 min
trainer validation PSNR full / masked25.3 / 24.3 dB
trainer validation IoU vs SAM mask0.926
near-fish band PSNR (fins)24.5 dB
production statusdone
visual note (curation)grouper-like (brown)

Diagnostics

Tracklet contact sheet (selection)
Held-out frames: real crop vs 4D render (composited over the plate)
Held-out frames: render on black
Estimated pose: fitted ellipsoid + axes on crops
Frame cleaning: identity / occlusion over time
Frames down-weighted / dropped by the robust trainer

Downloads

point_cloud.ply (canonical 3D gaussians) · poses_refined.json · model.pt (incl. per-frame 4D params) · species.json

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