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1a12965 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 | """Orchestrates every configurable augmentation effect for one sample.
Two passes are performed:
1. :meth:`AugmentationEngine.apply_to_signature` -- effects that only make
sense applied to the ink itself (stroke geometry, ink density, localized
blur/jitter), run on the RGBA signature layer *before* blending.
2. :meth:`AugmentationEngine.apply_to_document` -- effects that simulate
physical document/scanner degradation, run on the fully blended page.
Every effect is gated independently by its own ``enabled`` flag, a
probability roll, and a strength value -- each resolved from a seed derived
deterministically from ``(sample_seed, augmentation_name)`` (or an explicit
per-effect ``seed`` override in config), guaranteeing reproducibility.
Every effect's resolved parameters are collected into an
:class:`AugmentationRecord` for full metadata traceability, even when the
effect was not applied.
"""
from __future__ import annotations
from dataclasses import dataclass, field
from typing import Any
import numpy as np
from src.augmentation import albumentations_effects as AE
from src.augmentation import document_effects as DE
from src.augmentation import signature_effects as SE
from src.config.schema import AugmentationParam, AugmentationsConfig
from src.utils.logging_utils import get_logger
from src.utils.random_utils import SeedManager, resolve_scalar_or_range
logger = get_logger(__name__)
@dataclass
class AugmentationRecord:
"""The resolved, applied-or-not state of a single augmentation effect."""
name: str
enabled: bool
applied: bool
strength: float
probability: float
seed: int
params: dict[str, Any] = field(default_factory=dict)
def _prepare(name: str, cfg: AugmentationParam, seed_manager: SeedManager) -> tuple[bool, np.random.Generator, int]:
seed = cfg.seed if cfg.seed is not None else seed_manager.seed_for(f"augmentation:{name}")
rng = np.random.default_rng(seed)
roll = float(rng.uniform(0.0, 1.0))
applied = bool(cfg.enabled and roll < cfg.probability)
return applied, rng, seed
def _record(name: str, cfg: AugmentationParam, applied: bool, seed: int,
strength: float = 0.0, params: "dict | None" = None) -> AugmentationRecord:
return AugmentationRecord(
name=name, enabled=cfg.enabled, applied=applied, strength=round(strength, 4),
probability=cfg.probability, seed=seed, params=params or {},
)
class AugmentationEngine:
"""Applies the full configurable augmentation suite to a signature layer and a document.
Example:
>>> engine = AugmentationEngine(cfg.augmentation)
>>> rgba, sig_records = engine.apply_to_signature(placed_rgba, seed_manager)
>>> doc, doc_records = engine.apply_to_document(blended_doc, seed_manager)
"""
def __init__(self, config: AugmentationsConfig) -> None:
self.config = config
# ------------------------------------------------------------------ #
# Signature-layer effects
# ------------------------------------------------------------------ #
def apply_to_signature(
self, rgba: np.ndarray, seed_manager: SeedManager,
) -> tuple[np.ndarray, dict[str, AugmentationRecord]]:
cfg = self.config
records: dict[str, AugmentationRecord] = {}
out = rgba
applied, rng, seed = _prepare("rotation", cfg.rotation, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.rotation.strength, rng)
extra_deg = float(rng.uniform(-1, 1)) * strength * 8.0
out = SE.jitter_rotation(out, extra_deg)
records["rotation"] = _record("rotation", cfg.rotation, True, seed, strength, {"extra_deg": round(extra_deg, 3)})
else:
records["rotation"] = _record("rotation", cfg.rotation, False, seed)
applied, rng, seed = _prepare("stroke_dilation", cfg.stroke_dilation, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.stroke_dilation.strength, rng)
out = SE.stroke_morphology(out, strength, thicken=True)
records["stroke_dilation"] = _record("stroke_dilation", cfg.stroke_dilation, True, seed, strength, {"thicken": True})
else:
records["stroke_dilation"] = _record("stroke_dilation", cfg.stroke_dilation, False, seed)
applied, rng, seed = _prepare("ink_fading", cfg.ink_fading, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.ink_fading.strength, rng)
out = SE.ink_fading(out, strength, rng)
records["ink_fading"] = _record("ink_fading", cfg.ink_fading, True, seed, strength)
else:
records["ink_fading"] = _record("ink_fading", cfg.ink_fading, False, seed)
applied, rng, seed = _prepare("ink_bleed", cfg.ink_bleed, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.ink_bleed.strength, rng)
out = SE.ink_bleed(out, strength)
records["ink_bleed"] = _record("ink_bleed", cfg.ink_bleed, True, seed, strength)
else:
records["ink_bleed"] = _record("ink_bleed", cfg.ink_bleed, False, seed)
applied, rng, seed = _prepare("motion_blur", cfg.motion_blur, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.motion_blur.strength, rng)
angle = float(rng.uniform(0, 180))
out = SE.motion_blur_signature(out, strength, angle)
records["motion_blur"] = _record("motion_blur", cfg.motion_blur, True, seed, strength, {"angle_deg": round(angle, 2)})
else:
records["motion_blur"] = _record("motion_blur", cfg.motion_blur, False, seed)
applied, rng, seed = _prepare("gaussian_blur", cfg.gaussian_blur, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.gaussian_blur.strength, rng)
sigma = 0.2 + strength * 2.2
out = SE.gaussian_blur_signature(out, sigma)
records["gaussian_blur"] = _record("gaussian_blur", cfg.gaussian_blur, True, seed, strength, {"sigma": round(sigma, 3)})
else:
records["gaussian_blur"] = _record("gaussian_blur", cfg.gaussian_blur, False, seed)
return out, records
# ------------------------------------------------------------------ #
# Document-level effects
# ------------------------------------------------------------------ #
def apply_to_document(
self, image: np.ndarray, seed_manager: SeedManager,
) -> tuple[np.ndarray, dict[str, AugmentationRecord]]:
cfg = self.config
records: dict[str, AugmentationRecord] = {}
out = image
applied, rng, seed = _prepare("perspective", cfg.perspective, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.perspective.strength, rng)
out = AE.perspective_warp(out, strength, seed)
records["perspective"] = _record("perspective", cfg.perspective, True, seed, strength)
else:
records["perspective"] = _record("perspective", cfg.perspective, False, seed)
applied, rng, seed = _prepare("contrast", cfg.contrast, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.contrast.strength, rng)
out = AE.contrast_shift(out, strength, seed)
records["contrast"] = _record("contrast", cfg.contrast, True, seed, strength)
else:
records["contrast"] = _record("contrast", cfg.contrast, False, seed)
applied, rng, seed = _prepare("gamma", cfg.gamma, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.gamma.strength, rng)
out, gamma_value = AE.gamma_shift(out, strength, seed)
records["gamma"] = _record("gamma", cfg.gamma, True, seed, strength, {"gamma": gamma_value})
else:
records["gamma"] = _record("gamma", cfg.gamma, False, seed)
applied, rng, seed = _prepare("coffee_stain", cfg.coffee_stain, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.coffee_stain.strength, rng)
out, params = DE.coffee_stain(out, strength, rng)
records["coffee_stain"] = _record("coffee_stain", cfg.coffee_stain, True, seed, strength, params)
else:
records["coffee_stain"] = _record("coffee_stain", cfg.coffee_stain, False, seed)
applied, rng, seed = _prepare("stain", cfg.stain, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.stain.strength, rng)
out, params = DE.stain(out, strength, cfg.stain.type, rng)
records["stain"] = _record("stain", cfg.stain, True, seed, strength, params)
else:
records["stain"] = _record("stain", cfg.stain, False, seed)
applied, rng, seed = _prepare("shadow", cfg.shadow, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.shadow.strength, rng)
out, params = DE.shadow(out, strength, cfg.shadow.type, rng)
records["shadow"] = _record("shadow", cfg.shadow, True, seed, strength, params)
else:
records["shadow"] = _record("shadow", cfg.shadow, False, seed)
applied, rng, seed = _prepare("crumple", cfg.crumple, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.crumple.strength, rng)
density = resolve_scalar_or_range(cfg.crumple.wrinkle_density, rng)
out, params = DE.crumple(out, strength, density, rng)
records["crumple"] = _record("crumple", cfg.crumple, True, seed, strength, {**params, "wrinkle_density": round(density, 3)})
else:
records["crumple"] = _record("crumple", cfg.crumple, False, seed)
applied, rng, seed = _prepare("discoloration", cfg.discoloration, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.discoloration.strength, rng)
out, params = DE.discoloration(out, strength, cfg.discoloration.tone, rng)
records["discoloration"] = _record("discoloration", cfg.discoloration, True, seed, strength, params)
else:
records["discoloration"] = _record("discoloration", cfg.discoloration, False, seed)
applied, rng, seed = _prepare("page_tilt", cfg.page_tilt, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.page_tilt.strength, rng)
out, params = DE.page_tilt(out, strength, rng)
records["page_tilt"] = _record("page_tilt", cfg.page_tilt, True, seed, strength, params)
else:
records["page_tilt"] = _record("page_tilt", cfg.page_tilt, False, seed)
applied, rng, seed = _prepare("dust", cfg.dust, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.dust.strength, rng)
out, params = DE.dust(out, strength, rng)
records["dust"] = _record("dust", cfg.dust, True, seed, strength, params)
else:
records["dust"] = _record("dust", cfg.dust, False, seed)
applied, rng, seed = _prepare("scanner_streaks", cfg.scanner_streaks, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.scanner_streaks.strength, rng)
out, params = DE.scanner_streaks(out, strength, rng)
records["scanner_streaks"] = _record("scanner_streaks", cfg.scanner_streaks, True, seed, strength, params)
else:
records["scanner_streaks"] = _record("scanner_streaks", cfg.scanner_streaks, False, seed)
applied, rng, seed = _prepare("scanner_noise", cfg.scanner_noise, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.scanner_noise.strength, rng)
out = AE.sensor_noise(out, strength, seed)
records["scanner_noise"] = _record("scanner_noise", cfg.scanner_noise, True, seed, strength)
else:
records["scanner_noise"] = _record("scanner_noise", cfg.scanner_noise, False, seed)
applied, rng, seed = _prepare("salt_pepper", cfg.salt_pepper, seed_manager)
if applied:
strength = resolve_scalar_or_range(cfg.salt_pepper.strength, rng)
out = AE.salt_and_pepper(out, strength, seed)
records["salt_pepper"] = _record("salt_pepper", cfg.salt_pepper, True, seed, strength)
else:
records["salt_pepper"] = _record("salt_pepper", cfg.salt_pepper, False, seed)
# JPEG compression must run last: it is a lossy re-encode and every
# subsequent pixel-level effect would otherwise mask its artifacts.
jpeg_cfg = cfg.jpeg_compression
applied, rng, seed = _prepare("jpeg_compression", jpeg_cfg, seed_manager)
if applied:
strength = resolve_scalar_or_range(jpeg_cfg.strength, rng)
out, quality = AE.jpeg_compression(out, jpeg_cfg.min_quality, jpeg_cfg.max_quality, seed)
records["jpeg_compression"] = _record("jpeg_compression", jpeg_cfg, True, seed, strength, {"quality": quality})
else:
records["jpeg_compression"] = _record("jpeg_compression", jpeg_cfg, False, seed)
return out, records
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