lhk229
5ddf0cd392
Green spill bleeds into pixels ViTMatte marks as solid foreground (alpha~1), but despill was gated to the soft edge band (0.005<alpha<0.995) and weakened exactly there: the alpha tent peaked at 0.5 and bg_confidence (low on the character edge) further suppressed the correction. - (1) Apply despill to the whole foreground (alpha > edge_low) instead of the soft band only; neutral pixels stay untouched via the green-excess term. - (2) Weight by alpha at full strength across the opaque range (alpha>=0.5), easing off only where mostly transparent, instead of a tent peaking at 0.5. - (3) Drop bg_confidence as a despill gate; localise purely by green excess. Controlled comparison (same alpha, only despill changed), edge_green_excess: ViTMatte TestImage p95 0.239->0.176, mean 0.131->0.061 ViTMatte TestImage2 p95 0.231->0.165, mean 0.115->0.052 Removes now-unused DespillSettings fields edge_high and bg_confidence_weight. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
from __future__ import annotations
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from dataclasses import dataclass
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@dataclass(frozen=True)
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class ChromaSettings:
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green_margin: float = 0.08
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min_green_value: float = 0.22
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min_saturation: float = 0.20
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hue_low: float = 35.0
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hue_high: float = 95.0
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border_ratio: float = 0.04
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min_samples: int = 2048
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hue_sigma_min: float = 7.0
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lab_sigma_min: float = 10.0
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rgb_sigma_min: float = 0.08
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@dataclass(frozen=True)
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class TrimapSettings:
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sure_bg_threshold: float = 0.92
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sure_fg_threshold: float = 0.12
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unknown_radius_ratio: float = 0.012
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fg_safe_radius_ratio: float = 0.006
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min_unknown_radius: int = 4
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min_fg_safe_radius: int = 2
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@dataclass(frozen=True)
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class AlphaPostSettings:
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min_component_area_ratio: float = 0.00001
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fill_hole_area_ratio: float = 0.00002
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alpha_floor: float = 0.002
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alpha_ceil: float = 0.998
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@dataclass(frozen=True)
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class ForegroundSettings:
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enabled: bool = True
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edge_low: float = 0.005
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edge_high: float = 0.995
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min_unmix_alpha: float = 0.08
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unmix_strength: float = 0.70
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local_strength: float = 0.45
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local_blur_radius: int = 11
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local_alpha_threshold: float = 0.92
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local_bg_confidence_max: float = 0.20
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green_excess_margin: float = 0.015
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bg_confidence_weight: float = 0.70
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@dataclass(frozen=True)
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class DespillSettings:
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enabled: bool = True
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edge_low: float = 0.005
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strength: float = 0.92
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green_excess_margin: float = 0.015
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edge_expand_radius: int = 2
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alpha_weight_floor: float = 0.35
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@dataclass(frozen=True)
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class ModelSettings:
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model_name: str = "hustvl/vitmatte-small-composition-1k"
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device: str = "cuda"
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matting_method: str = "vitmatte"
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fallback_to_chroma_alpha: bool = False
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@dataclass(frozen=True)
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class PipelineSettings:
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chroma: ChromaSettings = ChromaSettings()
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trimap: TrimapSettings = TrimapSettings()
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alpha_post: AlphaPostSettings = AlphaPostSettings()
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foreground: ForegroundSettings = ForegroundSettings()
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despill: DespillSettings = DespillSettings()
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model: ModelSettings = ModelSettings()
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