Yellowfin hind · w40_fish7

Cephalopholis hemistiktos · Serranidae · 73% · medium reconstructed model: poor

Reviewer: featureless blob: soft-coral occlusion and many head-on poses (one individual, not mixed)

Where it comes from

Original video (longest visit, 42:09-42:26), 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

Species

Yellowfin hind Cephalopholis hemistiktos Serranidae

72.7%

Redmouth grouper Aethaloperca rogaa Serranidae

8.4%

Peacock hind Cephalopholis argus Serranidae

5.0%

African coris Coris cuvieri Labridae

2.9%

Brown-spotted spinefoot Siganus stellatus Siganidae

2.4%

Family: Serranidae 88%, Labridae 5%, Acanthuridae 3% · agreement across crops 80% · 64 crops · bioclip-2.5 (hf-hub:imageomics/bioclip-2.5-vith14, open_clip, zero-shot)

Data and reconstruction

window	40:00 – 48:00
visits	3: 40:27-40:36, 40:38-40:41, 42:10-42:31
frames (10 fps) detected / kept	295 / 263
valid poses (10 fps)	291
frames with background plate	186
median size	102.0 px
30 fps frames / valid poses	723 / 684
method	4D GS, fins + bending + tail (30 fps)
model shown	v1 (gs_final)
iterations	4000
gaussians	18485
training time	23 min
trainer validation PSNR full / masked	19.7 / 22.4 dB
trainer validation IoU vs SAM mask	0.834
near-fish band PSNR (fins)	18.2 dB
production status	done
visual note (curation)	brown grouper

Diagnostics

Held-out frames: real crop vs 4D render (composited over the plate)

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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