Yellowfin hind · w58_fish2

Cephalopholis hemistiktos · Serranidae · 61% · medium reconstructed model: fair
Reviewer: plain dark body with tail fan

Where it comes from

Original video (longest visit, 59:56-60:16), 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
61.4%
Redmouth grouper Aethaloperca rogaa Serranidae
12.3%
Striated surgeonfish Ctenochaetus striatus Acanthuridae
6.1%
Dark damsel Pomacentrus aquilus Pomacentridae
4.1%
Slingjaw wrasse Epibulus insidiator Labridae
4.0%

Family: Serranidae 76%, Acanthuridae 7%, Labridae 6% · agreement across crops 64% · 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

window58:00 – 68:00
visits2: 59:40-59:41, 59:45-60:06
frames (10 fps) detected / kept205 / 203
valid poses (10 fps)195
frames with background plate171
median size120.0 px
30 fps frames / valid poses658 / 566
method4D GS, fins + bending + tail (30 fps)
model shownv1 (gs_final)
iterations4000
gaussians23411
training time22 min
trainer validation PSNR full / masked23.5 / 22.3 dB
trainer validation IoU vs SAM mask0.887
near-fish band PSNR (fins)23.2 dB
production statusdone
visual note (curation)brown grouper (review: dark close-up tracklet t2727 with frame-cut partial masks removed)

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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