quantize::laplacian

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Classes

	Name
class	quantize::laplacian::LaplacianWeightedError

Detailed Description

Encode-side Laplacian pyramid error analysis for weight quantization.

Per D-07: Laplacian pyramid analysis is encode-side only -- NOT decoded at runtime.
Separates low-frequency structure from high-frequency residual error,
preventing outliers from dominating per-block scale and making T158 more
viable on residuals near zero.

Adapts pyramid levels to block size (per RESEARCH.md Pitfall 2):
- 4x4 and 8x8 blocks: skip Laplacian entirely, use plain L2 (MSE)
- 16x16 blocks: 1 level
- 32x32 blocks: 2 levels
- 64x64 blocks: 3 levels

Uses scipy.ndimage.gaussian_filter for Gaussian smoothing with
configurable sigma and mode parameters.

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Updated on 2026-07-25 at 22:56:57 +0000