Yellowfin hind · w40_fish3

Cephalopholis hemistiktos · Serranidae · 74% · medium reconstructed model: fair
Reviewer: very dark model; outline right

Where it comes from

Original video (longest visit, 40:24-40:44), 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
74.1%
Vermilion hind Cephalopholis oligosticta Serranidae
7.2%
Redmouth grouper Aethaloperca rogaa Serranidae
6.9%
Peacock hind Cephalopholis argus Serranidae
3.6%
Viridescent parrotfish Calotomus viridescens Scaridae
1.5%

Family: Serranidae 94%, Labridae 3%, Scaridae 2% · agreement across crops 84% · 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

window40:00 – 48:00
visits4: 40:00-40:02, 40:20-40:42, 40:44-40:50, 42:37-42:48
frames (10 fps) detected / kept421 / 341
valid poses (10 fps)408
frames with background plate406
median size160.0 px
30 fps frames / valid poses722 / 654
method4D GS, fins + bending + tail (30 fps)
model shownv1 (gs_final)
iterations4000
gaussians14709
training time23 min
trainer validation PSNR full / masked32.4 / 30.5 dB
trainer validation IoU vs SAM mask0.842
near-fish band PSNR (fins)32.6 dB
production statusdone
visual note (curation)brown grouper in shadow (+ a few mid-water frames)

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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