Yellowfin hind · w32_fish5

Cephalopholis hemistiktos · Serranidae · 95% · high reconstructed model: poor
Reviewer: featureless oval without a readable tail; behind coral for its first ~9 s

Where it comes from

Original video (longest visit, 37:45-38:05), 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
95.0%
Redmouth grouper Aethaloperca rogaa Serranidae
3.3%
Peacock hind Cephalopholis argus Serranidae
0.9%
Vermilion hind Cephalopholis oligosticta Serranidae
0.3%
Broom filefish Amanses scopas Monacanthidae
0.1%

Family: Serranidae 100%, Labridae 0%, Monacanthidae 0% · agreement across crops 97% · 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

window32:00 – 40:00
visits1: 37:43-38:02
frames (10 fps) detected / kept192 / 189
valid poses (10 fps)188
frames with background plate166
median size116.0 px
30 fps frames / valid poses592 / 565
method4D GS, fins + bending + tail (30 fps)
model shownv1 (gs_final)
iterations4000
gaussians17880
training time22 min
trainer validation PSNR full / masked22.4 / 23.5 dB
trainer validation IoU vs SAM mask0.843
near-fish band PSNR (fins)21.2 dB
production statusdone
visual note (curation)brown grouper (partly behind coral)

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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