VOIDthe CENTER
A disagreement instrument for images.
Literal sameness is not structural kinship.
Literal sameness is not structural kinship.
A
Drop / click image A
B
Drop / click image B
The witnesses disagree. Inspect the gap.
Anchored NCD × VTL form fieldmidlines are visual guides · not calibrated cutoffs
shared substrate
changed form
changed form
different substrate
different form
different form
shared substrate
shared form
shared form
different substrate
shared form
anchored substrate distance →form difference →shared form
Raw LZ-NCD estimate
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Symmetric compression-distance estimate. Not clamped.
Anchored substrate
—
Pair distance corrected by the mean A/B self floor and scaled toward their scramble/noise anchors.
VTL form delta
—
Mean absolute delta over nine canonical spatial metrics.
Witness divergence
—
Descriptive coordinate gap between two normalized witnesses; not a calibrated statistic.
Substrate anchors
Raw compression distance means little without reference. These anchors are computed from image A under the same normalization and LZ estimator.
Self floor A / B
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Estimator-specific identity baselines; may be nonzero for highly compressible fields.
Shuffle A / B
—
Same bytes with sequence structure destroyed.
Noise A / B
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Independent far references for each image.
Tone delta
—
Cosine distance between luminance histograms.
Center dependence
Center behavior is reported as separate observables rather than collapsed into a “refusal” score. Structural mass is the canonical Sobel-mask mass, not dark-pixel occupancy.
A centroid displacement
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Distance of structural centroid from frame center, normalized by farthest corner.
B centroid displacement
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Same measurement for B.
A center enrichment
—
Central structural-mass share divided by central disk area share. 1 = uniform expectation.
B center enrichment
—
Below 1 = center depleted; above 1 = center concentrated.
RCA-2 radial compliance
Radial profiles are fit independently around frame center and structural-mass centroid to an exponential falloff family using Jensen–Shannon divergence in base 2.
A RC frame / mass
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—
B RC frame / mass
—
—
A ΔRC
—
Positive favors mass-centered radial order.
B ΔRC
—
Negative favors frame-centered radial order.
Canonical VTL spatial fingerprint delta
Browser port of the Color Kernel v0.4.8 definitions: Sobel structural mask, centroid offsets, void ratio, convex-hull packing, connected-component cohesion, peripheral pull, orientation stability, structural thickness, and spatial dispersion. No per-axis scale hacks are applied because all nine canonical deltas naturally lie in [0,1].
The browser port is intended to reproduce the notebook definitions, but numerical equality across SciPy/scikit-image and browser implementations should still be validated on a fixed corpus before publication-grade claims.
Structural mass field
A · black = structural mask · red cross = weighted structural centroid · gray cross = frame center
B · same conventions. Aspect ratio is preserved for VTL analysis; no square letterbox is imposed.
Raw measurement