volseq_synth_dividing — LIVE4D `synth` op

• Data kinds: none → volseq (an op determined by its arguments alone — it takes no image or data input)

• Call: import fullseye as fs; fs.ledger.volseq_synth_dividing(shape=(24, 32, 32), n_frames: 'int' = 24, split_frame: 'int' = 8, speed: 'float' = 0.5, sigma: 'float' = 2.5, axis: 'int' = 3, noise: 'float' = 0.0, seed: 'int' = 0) -> 'np.ndarray' (to call the implementation directly, import live4d; live4d.volseq_synth_dividing(shape=(24, 32, 32), n_frames: 'int' = 24, split_frame: 'int' = 8, speed: 'float' = 0.5, sigma: 'float' = 2.5, axis: 'int' = 3, noise: 'float' = 0.0, seed: 'int' = 0) -> 'np.ndarray'; from the registry, opslive4d.get("volseq_synth_dividing"))

Usage

Volume time series (T, Z, Y, X) of a blob splitting in two at a known speed (volseq).

Up to split_frame there is 1 Gaussian blob at the centre (standard deviation sigma); after that 2 blobs move apart along axis (1 = z, 2 = y, 3 = x) by ±speed · (t − split_frame) voxels each (a minimal model of cell division). Since ground truth = the positions of the centres, the flow (vol_flow_3d) should be a translation of ±speed and the trajectories straight lines.

>>> s = volseq_synth_dividing((16, 24, 24), n_frames=12, split_frame=4, speed=0.5)

>>> s.shape

(12, 16, 24, 24)

Detailed usage guide

• live4d family guide

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• poc_live4d — py -3.11 examples/poc_live4d.py

Ops the type connects to (they accept `volseq` as input)

volseq_mip_video · volseq_cut_video · volseq_speed · volseq_pathline_render · volseq_pathline_orbit · volseq_interpolate_flow · volseq_magnify_motion · volseq_render_orbit

Same category (`synth`)

volseq_synth_beating

*Provenance: live4d.py — LIVE4D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

volseq_synth_dividing — LIVE4D synth op