Add synthetic OCR data generator and baseline benchmark
This commit is contained in:
@@ -9,7 +9,7 @@ Eine lokale Testoberfläche für zwei unabhängige Wege auf **demselben Bild**:
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Die Oberfläche zeigt Rohtext, Feldvorschläge, Bildbelege und Laufzeiten nebeneinander. Die Ecken des Dokuments lassen sich per Maus oder Touch setzen; alternativ wird das ganze Bild verwendet. Besondere Feldcodes: C.1.1 (Name), C.1.2 (Vorname), C.1.3 (Anschrift), B (Erstzulassung), 2.1 (HSN) und 2.2 (TSN). **Jeden Vorschlag am Bild prüfen.** Unleserliche oder unbelegte Werte bleiben offen. Es werden keine künstlichen Konfidenzwerte angezeigt.
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Die Oberfläche zeigt Rohtext, Feldvorschläge, Bildbelege und Laufzeiten nebeneinander. Die Ecken des Dokuments lassen sich per Maus oder Touch setzen; alternativ wird das ganze Bild verwendet. Besondere Feldcodes: C.1.1 (Name), C.1.2 (Vorname), C.1.3 (Anschrift), B (Erstzulassung), 2.1 (HSN) und 2.2 (TSN). **Jeden Vorschlag am Bild prüfen.** Unleserliche oder unbelegte Werte bleiben offen. Es werden keine künstlichen Konfidenzwerte angezeigt.
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Dieses Repository enthält **keine Dokumentbilder, OCR-Ergebnisse, personenbezogenen Testdaten, Modellgewichte, privaten Hostnamen oder Zugangsdaten**. Die Tests nutzen erfundene Textzeilen und generierte Bilder. Es gibt kein Training und keine Datenübertragung an externe OCR- oder KI-APIs. Die offiziellen Modellgewichte werden beim Einrichten heruntergeladen; die Inferenz nutzt anschließend explizite lokale Modellverzeichnisse. Der optionale SSH-Modus überträgt das Bild ausschließlich an eine selbst verwaltete Maschine. Das Projekt ist für interne Tests gedacht und enthält keine öffentliche Lizenz.
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Dieses Repository enthält **keine Dokumentbilder, OCR-Ergebnisse, personenbezogenen Testdaten, Modellgewichte, privaten Hostnamen oder Zugangsdaten**. Die Tests nutzen erfundene Textzeilen und generierte Bilder. Ein Generator kann lokal synthetische Trainingsbeispiele erzeugen; dieses Repository startet selbst kein Training. Es gibt keine Datenübertragung an externe OCR- oder KI-APIs. Die offiziellen Modellgewichte werden beim Einrichten heruntergeladen; die Inferenz nutzt anschließend explizite lokale Modellverzeichnisse. Der optionale SSH-Modus überträgt das Bild ausschließlich an eine selbst verwaltete Maschine. Das Projekt ist für interne Tests gedacht und enthält keine öffentliche Lizenz.
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## Voraussetzungen
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## Voraussetzungen
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@@ -98,6 +98,21 @@ Die klassische OCR liefert präzisere Zeilenboxen, kann aber Text verlesen. Die
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Die App verarbeitet Uploads im Speicher und in kurzlebigen temporären Dateien. Sie schreibt weder Dokumente noch OCR-Ausgaben in ein dauerhaftes Verzeichnis. Browser und eigener Server sehen die Bilddaten; bei SSH-Betrieb auch der eigene SSH-Zielhost. Vor dem Einsatz mit echten Dokumenten sollten Modelle bereits eingerichtet sein. Ein fehlender Cache wird als Fehler angezeigt, statt beim Upload Modellgewichte nachzuladen.
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Die App verarbeitet Uploads im Speicher und in kurzlebigen temporären Dateien. Sie schreibt weder Dokumente noch OCR-Ausgaben in ein dauerhaftes Verzeichnis. Browser und eigener Server sehen die Bilddaten; bei SSH-Betrieb auch der eigene SSH-Zielhost. Vor dem Einsatz mit echten Dokumenten sollten Modelle bereits eingerichtet sein. Ein fehlender Cache wird als Fehler angezeigt, statt beim Upload Modellgewichte nachzuladen.
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## Synthetische Daten und Training
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Der Generator erzeugt **sichtbar ungültige, erfundene** Fahrzeugformulare mit variierter Feldreihenfolge, Schrift, Dichte und Bildstörung. Er liest keine Quelldokumente. Ausgabe und Modellartefakte liegen unter dem von Git ignorierten `data/`-Verzeichnis. Niemals echte Dokumente, daraus ausgeschnittene Texte oder OCR-Ausgaben in diesen Trainingssatz mischen.
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```sh
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python -m ocr_compare.synthetic --out data/synthetic-v1 --count 100 --seed 20261007
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python -m ocr_compare.benchmark_synthetic --dataset data/synthetic-v1
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```
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Vor dem Benchmark die **klassischen** Modelle mit `python -m ocr_compare.setup_models --classic` lokal einrichten. Der Benchmark verarbeitet standardmäßig nur den nach ganzen Dokumenten getrennten Validierungsteil; `--split train` und `--split all` sind für die Fehlersuche gedacht. Er gibt ausschließlich Summen aus: an Wertboxen überlappende OCR-Zeilen, dort vollständig gelesene Werte und korrekt, falsch oder gar nicht zugeordnete Zielfelder. Für eine neue Stichprobe ein neues Ausgabeverzeichnis und einen anderen Seed nehmen. Der Generator überschreibt nichts.
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Der Satz enthält `rec_train.txt`/`rec_val.txt` mit Bildpfad und Text für die PaddleOCR-Texterkennung sowie `det_train.txt`/`det_val.txt` mit Seitenpfad und Zeilenpolygonen für die Texterkennung auf der Seite. `ground_truth.jsonl` enthält die exakten synthetischen Sollwerte für C.1.1, C.1.2, C.1.3, B, 2.1 und 2.2. Eine Validierung der Labels und des Auswertungscodes ist in den lokalen Tests enthalten; **ein Modelltraining und dessen Export sind hier noch nicht getestet**.
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Für einen Trainingsexperiment zuerst den Fehler nach Stufe messen: Fehlende Textboxen sprechen für den [Detektor](https://www.paddleocr.ai/main/en/version3.x/module_usage/text_detection.html), falsch gelesene vorhandene Boxen für den [Recognizer](https://www.paddleocr.ai/main/en/version3.x/module_usage/text_recognition.html). Korrekt gelesene Werte mit falschem Feldcode sind ein Zuordnungs- oder Layoutproblem. PaddleOCR-VL ist eine Pipeline aus Layoutanalyse und VLM. Die [offizielle SFT-Anleitung](https://www.paddleocr.ai/main/en/version3.x/pipeline_usage/PaddleOCR-VL.html#5-model-fine-tuning) unterstützt zurzeit nur das VLM; die [ERNIEKit-Beispielkonfiguration](https://github.com/PaddlePaddle/ERNIE/blob/release/v1.4/docs/paddleocr_vl_sft.md) wurde auf einer 80-GB-GPU demonstriert. Das ist keine belastbare Zusage für Training auf einer kleineren lokalen GPU. Synthetische Validierung allein beweist keine Verbesserung bei echten Dokumenten: Diese ausschließlich als unveränderten, lokalen **Test-Holdout** verwenden, nie zum Training.
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## Prüfen und Fehler eingrenzen
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## Prüfen und Fehler eingrenzen
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```sh
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```sh
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@@ -0,0 +1,105 @@
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"""Measure detection/readability and field assignment on generated pages only.
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Set OCR_MODEL_HOME to a local cache with official classic model weights first.
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This script never loads personal documents and prints aggregate counts only.
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"""
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from __future__ import annotations
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import argparse
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import json
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from pathlib import Path
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import re
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import tempfile
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from . import server
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from .synthetic import TARGET_CODES
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def _norm(value: str) -> str:
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return re.sub(r"\s+", " ", value.upper()).strip()
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def _box(polygon: list[list[int]]) -> tuple[float, float, float, float]:
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xs, ys = zip(*polygon)
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return min(xs), min(ys), max(xs), max(ys)
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def _coverage(reference: tuple[float, float, float, float],
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candidate: list[float]) -> float:
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x1, y1, x2, y2 = reference
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a, b, c, d = candidate
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overlap = max(0, min(x2, c) - max(x1, a)) * max(0, min(y2, d) - max(y1, b))
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return overlap / max(1, (x2 - x1) * (y2 - y1))
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def evaluate(dataset: Path, *, split: str = "val", limit: int | None = None) -> dict:
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if split not in ("train", "val", "all"):
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raise ValueError("split must be train, val or all")
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dataset = dataset.resolve()
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manifest = json.loads((dataset / "manifest.json").read_text(encoding="utf-8"))
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if manifest.get("source") != "fully synthetic" or manifest.get("training_on_real_documents") is not False:
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raise ValueError("this benchmark accepts generated datasets only")
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rows = [json.loads(line) for line in (dataset / "ground_truth.jsonl").read_text(encoding="utf-8").splitlines()]
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if split != "all":
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rows = [row for row in rows if row["split"] == split]
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if limit is not None:
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if limit < 1:
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raise ValueError("limit must be positive")
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rows = rows[:limit]
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counts = {"split": split, "documents": 0, "failed_documents": 0, "value_lines": 0,
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"value_boxes_covered": 0, "value_text_read": 0,
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"fields": 0, "fields_exact": 0, "fields_wrong": 0,
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"fields_missing": 0,
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"per_code": {code: {"value_lines": 0, "read": 0, "assigned": 0}
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for code in TARGET_CODES}}
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for row in rows:
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if row.get("source") != "fully synthetic":
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raise ValueError("non-synthetic row")
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image = (dataset / row["image"]).resolve()
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if not image.is_relative_to(dataset / "pages"):
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raise ValueError("image outside generated pages")
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with tempfile.TemporaryDirectory(prefix="ocr-synthetic-benchmark-") as directory:
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result = server._classic(image.read_bytes(), Path(directory))
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counts["documents"] += 1
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if result["status"] != "ok":
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counts["failed_documents"] += 1
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readings = result.get("lines", []) if result["status"] == "ok" else []
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for item in row["lines"]:
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code = item["code"]
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if item["part"] != "value" or code not in TARGET_CODES:
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continue
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counts["value_lines"] += 1
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counts["per_code"][code]["value_lines"] += 1
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overlaps = [line for line in readings
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if line.get("box") and _coverage(_box(item["polygon"]), line["box"]) >= .45]
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if overlaps:
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counts["value_boxes_covered"] += 1
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if any(_norm(item["text"]) in _norm(line["text"]) for line in overlaps):
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counts["value_text_read"] += 1
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counts["per_code"][code]["read"] += 1
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assigned = ({item["code"]: _norm(item["value"]) for item in result["fields"]}
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if result["status"] == "ok" else {})
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for code, reference in row["fields"].items():
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counts["fields"] += 1
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if assigned.get(code) == _norm(reference):
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counts["fields_exact"] += 1
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counts["per_code"][code]["assigned"] += 1
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elif code in assigned:
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counts["fields_wrong"] += 1
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else:
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counts["fields_missing"] += 1
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return counts
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def main() -> None:
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument("--dataset", type=Path, required=True)
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parser.add_argument("--split", choices=("train", "val", "all"), default="val")
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parser.add_argument("--limit", type=int)
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args = parser.parse_args()
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print(json.dumps(evaluate(args.dataset, split=args.split, limit=args.limit), indent=2))
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if __name__ == "__main__":
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main()
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"""Generate labeled, visibly invalid vehicle-form images without source documents.
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The output is ignored by Git. Each page has exact field/line ground truth,
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PaddleOCR detection labels, and recognition crops with page-level splits.
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"""
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from __future__ import annotations
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import argparse
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import json
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from pathlib import Path
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import random
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import cv2
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import numpy as np
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from PIL import Image, ImageDraw, ImageFont
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TARGET_CODES = ("C.1.1", "C.1.2", "C.1.3", "B", "2.1", "2.2")
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CAPTIONS = {
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"C.1.1": "Name", "C.1.2": "Vorname", "C.1.3": "Anschrift",
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"B": "Erstzulassung", "2.1": "HSN", "2.2": "TSN",
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"A": "Kennzeichen", "D.1": "Marke", "D.2": "Typ",
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"D.3": "Handelsname", "E": "Fahrzeug-ID", "P.3": "Kraftstoff",
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"F.1": "Masse", "F.2": "Gesamtmasse", "J": "Fahrzeugklasse",
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"P.1": "Hubraum", "P.2": "Leistung", "S.1": "Sitzplaetze",
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"V.7": "CO2", "G": "Leergewicht", "15.1": "Bereifung",
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"15.2": "Bereifung hinten",
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}
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EXTRA_CODES = ("A", "D.1", "D.2", "D.3", "E", "P.3", "F.1", "F.2",
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"J", "P.1", "P.2", "S.1", "V.7", "G", "15.1", "15.2")
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FONT_CANDIDATES = (
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"/System/Library/Fonts/Supplemental/Arial.ttf",
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"/System/Library/Fonts/Supplemental/Arial Narrow.ttf",
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"/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",
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"/usr/share/fonts/truetype/liberation2/LiberationSans-Regular.ttf",
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)
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SYLLABLES = ("VE", "NO", "RA", "TU", "ME", "LI", "SA", "KO", "DI", "FA",
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"ZEN", "BER", "LON", "FEL", "NAR", "TOV", "XEN", "MIR")
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def _fonts(font_path: Path | None, size: int) -> ImageFont.FreeTypeFont:
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candidates = ((str(font_path),) if font_path is not None else FONT_CANDIDATES)
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for path in candidates:
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try:
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return ImageFont.truetype(path, size)
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except OSError:
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continue
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if font_path is not None:
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raise ValueError("font unavailable")
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return ImageFont.load_default(size=size)
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def _word(rng: random.Random, *, syllables: int = 3) -> str:
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value = "".join(rng.choice(SYLLABLES) for _ in range(syllables))
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if rng.random() < .22:
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value = value.replace("A", "Ä", 1) if "A" in value else value.replace("O", "Ö", 1)
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return value
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def _values(rng: random.Random) -> dict[str, list[str]]:
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town = _word(rng, syllables=2) + "STADT"
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street = _word(rng, syllables=2) + rng.choice(("WEG", "STRASSE", "ALLEE"))
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date = f"{rng.randint(1, 28):02d}.{rng.randint(1, 12):02d}.{rng.randint(1995, 2024)}"
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return {
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"C.1.1": [_word(rng)],
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"C.1.2": [_word(rng, syllables=2)],
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"C.1.3": [f"{street} {rng.randint(1, 199)}",
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f"{rng.randint(10000, 99999)} {town}"],
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"B": [date],
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"2.1": [f"{rng.randint(1000, 9999)}"],
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"2.2": ["".join(rng.choices("ABCDEFGHJKLMNPRSTUVWXYZ", k=3)) +
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f"{rng.randint(0, 999):03d}"],
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"A": [f"TEST-{rng.randint(1000, 9999)}"],
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"D.1": [_word(rng, syllables=2)],
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"D.2": [f"TYP-{rng.randint(100, 999)}"],
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"D.3": [f"MODELL-{rng.randint(100, 999)}"],
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"E": [f"SYNTH-ID-{rng.randint(100000, 999999)}"],
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"P.3": [rng.choice(("BENZIN", "DIESEL", "ELEKTRO"))],
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"F.1": [f"{rng.randint(1300, 4200)} KG"],
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"F.2": [f"{rng.randint(1300, 4200)} KG"],
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"J": [rng.choice(("M1", "N1", "L3E"))],
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"P.1": [f"{rng.randint(100, 3000)} CCM"],
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"P.2": [f"{rng.randint(20, 250)} KW"],
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"S.1": [str(rng.randint(1, 7))],
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"V.7": [f"{rng.randint(30, 250)} G/KM"],
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"G": [f"{rng.randint(900, 2400)} KG"],
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"15.1": [f"{rng.randint(145, 265)}/55 R{rng.randint(14, 20)}"],
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"15.2": [f"{rng.randint(145, 265)}/55 R{rng.randint(14, 20)}"],
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}
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def _render(seed: int, font_path: Path | None):
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rng = random.Random(seed)
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if font_path is None:
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installed = [Path(path) for path in FONT_CANDIDATES if Path(path).is_file()]
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font_path = rng.choice(installed) if installed else None
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hardness = seed % 3
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dense = seed % 4 != 0
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width, height = rng.choice(((1800, 1180), (1680, 1260), (1500, 1450)))
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page = Image.new("RGB", (width, height), rng.choice(((248, 247, 243), (241, 244, 247))))
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draw = ImageDraw.Draw(page)
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value_font = _fonts(font_path, rng.randint(20, 25) if dense else rng.randint(30, 38))
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small_font = _fonts(font_path, rng.randint(15, 19) if dense else rng.randint(22, 27))
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header_font = _fonts(font_path, 27 if dense else 34)
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lines: list[dict] = []
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if hardness or dense:
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for y in range(115, height - 95, 17 if dense else 29):
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draw.line((35, y, width - 35, y + (y % 13) - 6),
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fill=(220, 225, 228), width=1)
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if hardness == 2:
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for _ in range(1400):
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||||||
|
x, y = rng.randrange(width), rng.randrange(height)
|
||||||
|
draw.point((x, y), fill=(209, 214, 216))
|
||||||
|
|
||||||
|
def line(text: str, x: int, y: int, font, *, code: str | None = None,
|
||||||
|
part: str = "decoration", max_width: int | None = None) -> None:
|
||||||
|
if len(text) > 25:
|
||||||
|
raise ValueError("recognition label exceeds 25 characters")
|
||||||
|
chosen = font
|
||||||
|
if max_width is not None:
|
||||||
|
while draw.textlength(text, font=chosen) > max_width and chosen.size > 19:
|
||||||
|
chosen = _fonts(font_path, chosen.size - 1)
|
||||||
|
ink = ((65, 70, 74), (76, 78, 80), (88, 85, 82)) if hardness == 2 else (
|
||||||
|
(28, 33, 40), (36, 39, 45), (52, 48, 47))
|
||||||
|
draw.text((x, y), text, font=chosen, fill=rng.choice(ink))
|
||||||
|
x1, y1, x2, y2 = draw.textbbox((x, y), text, font=chosen)
|
||||||
|
lines.append({"text": text, "code": code, "part": part,
|
||||||
|
"polygon": [[max(0, x1 - 5), max(0, y1 - 5)],
|
||||||
|
[min(width - 1, x2 + 5), max(0, y1 - 5)],
|
||||||
|
[min(width - 1, x2 + 5), min(height - 1, y2 + 5)],
|
||||||
|
[max(0, x1 - 5), min(height - 1, y2 + 5)]]})
|
||||||
|
|
||||||
|
margin = rng.randint(65, 90)
|
||||||
|
gap = rng.randint(24, 45)
|
||||||
|
cell_width = (width - 2 * margin - gap) // 2
|
||||||
|
top = 130 if dense else 155
|
||||||
|
rows = 8 if dense else 5
|
||||||
|
row_height = min(205, (height - top - 100) // rows)
|
||||||
|
draw.rectangle((margin - 15, 37, width - margin + 15, height - 35),
|
||||||
|
outline=(120, 127, 134), width=2)
|
||||||
|
line("SYNTHETISCHER TEST", margin, 54, header_font)
|
||||||
|
line("FAHRZEUGDATEN", width - margin - (240 if dense else 300), 60, small_font)
|
||||||
|
|
||||||
|
values = _values(rng)
|
||||||
|
codes = list(TARGET_CODES) + rng.sample(EXTRA_CODES, 10 if dense else 4)
|
||||||
|
rng.shuffle(codes)
|
||||||
|
for index, code in enumerate(codes):
|
||||||
|
column, row = index // rows, index % rows
|
||||||
|
x = margin + column * (cell_width + gap)
|
||||||
|
y = top + row * row_height
|
||||||
|
draw.rectangle((x, y, x + cell_width, y + row_height - 12),
|
||||||
|
outline=(138, 147, 151), width=rng.choice((1, 2)))
|
||||||
|
stacked = rng.random() < .65 or code == "C.1.3"
|
||||||
|
code_x, code_y = x + 14, y + 11
|
||||||
|
line(code, code_x, code_y, small_font, code=code, part="code")
|
||||||
|
caption_x = code_x + round(draw.textlength(code, font=small_font)) + 17
|
||||||
|
line(CAPTIONS[code], caption_x, code_y, small_font, code=code,
|
||||||
|
part="caption", max_width=max(90, cell_width - (caption_x - x) - 15))
|
||||||
|
value_x = x + (18 if stacked else round(cell_width * .43))
|
||||||
|
first_y = y + (39 if dense else 53) if stacked else y + 10
|
||||||
|
for offset, value in enumerate(values[code]):
|
||||||
|
if not stacked and offset == 0 and value_x < caption_x + (90 if dense else 175):
|
||||||
|
first_y = y + (43 if dense else 59)
|
||||||
|
line(value, value_x, first_y + (28 if dense else 40) * offset, value_font,
|
||||||
|
code=code, part="value", max_width=cell_width - (value_x - x) - 12)
|
||||||
|
|
||||||
|
line("UNGUELTIG / TESTDATEN", margin, height - 82, small_font)
|
||||||
|
src = np.float32([[0, 0], [width - 1, 0], [width - 1, height - 1], [0, height - 1]])
|
||||||
|
jitter = 20 if seed % 3 else 43
|
||||||
|
dst = np.float32([[rng.randint(0, jitter), rng.randint(0, jitter)],
|
||||||
|
[width - 1 - rng.randint(0, jitter), rng.randint(0, jitter)],
|
||||||
|
[width - 1 - rng.randint(0, jitter), height - 1 - rng.randint(0, jitter)],
|
||||||
|
[rng.randint(0, jitter), height - 1 - rng.randint(0, jitter)]])
|
||||||
|
transform = cv2.getPerspectiveTransform(src, dst)
|
||||||
|
image = cv2.warpPerspective(np.asarray(page), transform, (width, height),
|
||||||
|
flags=cv2.INTER_LINEAR, borderValue=(255, 255, 255))
|
||||||
|
for item in lines:
|
||||||
|
points = np.float32(item["polygon"]).reshape(-1, 1, 2)
|
||||||
|
transformed = cv2.perspectiveTransform(points, transform).reshape(4, 2)
|
||||||
|
item["polygon"] = [[round(float(np.clip(px, 0, width - 1))),
|
||||||
|
round(float(np.clip(py, 0, height - 1)))]
|
||||||
|
for px, py in transformed]
|
||||||
|
|
||||||
|
yy, xx = np.mgrid[0:height, 0:width]
|
||||||
|
gradient = 1 - (hardness * .07) * (xx / width) - (hardness * .04) * (yy / height)
|
||||||
|
image = np.uint8(np.clip(image.astype(np.float32) * gradient[:, :, None], 0, 255))
|
||||||
|
if hardness == 2:
|
||||||
|
image = cv2.GaussianBlur(image, (3, 3), .55)
|
||||||
|
noise = np.random.default_rng(seed).normal(0, 2.5, image.shape)
|
||||||
|
image = np.uint8(np.clip(image.astype(np.float32) + noise, 0, 255))
|
||||||
|
return image, lines, values, hardness
|
||||||
|
|
||||||
|
|
||||||
|
def _crop(image: np.ndarray, polygon: list[list[int]]) -> np.ndarray:
|
||||||
|
points = np.float32(polygon)
|
||||||
|
width = max(16, round(max(np.linalg.norm(points[1] - points[0]),
|
||||||
|
np.linalg.norm(points[2] - points[3]))))
|
||||||
|
height = max(16, round(max(np.linalg.norm(points[3] - points[0]),
|
||||||
|
np.linalg.norm(points[2] - points[1]))))
|
||||||
|
target = np.float32([[0, 0], [width - 1, 0], [width - 1, height - 1],
|
||||||
|
[0, height - 1]])
|
||||||
|
matrix = cv2.getPerspectiveTransform(points, target)
|
||||||
|
return cv2.warpPerspective(image, matrix, (width, height),
|
||||||
|
flags=cv2.INTER_LINEAR, borderValue=(255, 255, 255))
|
||||||
|
|
||||||
|
|
||||||
|
def generate(output: Path, *, count: int, seed: int, font_path: Path | None = None) -> dict:
|
||||||
|
"""Create a new directory; never read source files or overwrite a dataset."""
|
||||||
|
if count < 2:
|
||||||
|
raise ValueError("count must be at least 2 for a document-level holdout")
|
||||||
|
if output.exists():
|
||||||
|
raise FileExistsError(f"output already exists: {output}")
|
||||||
|
(output / "pages").mkdir(parents=True)
|
||||||
|
(output / "crops").mkdir()
|
||||||
|
validation = set(range(count - max(1, count // 5), count))
|
||||||
|
rec = {"train": [], "val": []}
|
||||||
|
det = {"train": [], "val": []}
|
||||||
|
metadata = []
|
||||||
|
for index in range(count):
|
||||||
|
page_id = f"synthetic-{index:05d}"
|
||||||
|
split = "val" if index in validation else "train"
|
||||||
|
image, lines, values, hardness = _render(seed + index * 1009, font_path)
|
||||||
|
page_path = f"pages/{page_id}.jpg"
|
||||||
|
quality = (92, 82, 69)[hardness]
|
||||||
|
if not cv2.imwrite(str(output / page_path), cv2.cvtColor(image, cv2.COLOR_RGB2BGR),
|
||||||
|
[cv2.IMWRITE_JPEG_QUALITY, quality]):
|
||||||
|
raise OSError("could not write synthetic page")
|
||||||
|
image = cv2.cvtColor(cv2.imread(str(output / page_path)), cv2.COLOR_BGR2RGB)
|
||||||
|
labels = []
|
||||||
|
for number, item in enumerate(lines):
|
||||||
|
crop_path = f"crops/{page_id}-{number:02d}.jpg"
|
||||||
|
crop = _crop(image, item["polygon"])
|
||||||
|
if not cv2.imwrite(str(output / crop_path), cv2.cvtColor(crop, cv2.COLOR_RGB2BGR),
|
||||||
|
[cv2.IMWRITE_JPEG_QUALITY, quality]):
|
||||||
|
raise OSError("could not write synthetic crop")
|
||||||
|
rec[split].append(f"{crop_path}\t{item['text']}\n")
|
||||||
|
item["crop"] = crop_path
|
||||||
|
labels.append({"transcription": item["text"], "points": item["polygon"]})
|
||||||
|
det[split].append(page_path + "\t" + json.dumps(labels, ensure_ascii=False) + "\n")
|
||||||
|
metadata.append({"id": page_id, "split": split, "source": "fully synthetic",
|
||||||
|
"image": page_path, "width": image.shape[1], "height": image.shape[0],
|
||||||
|
"hardness": hardness,
|
||||||
|
"fields": {code: "\n".join(values[code]) for code in TARGET_CODES},
|
||||||
|
"lines": lines})
|
||||||
|
for split in ("train", "val"):
|
||||||
|
(output / f"rec_{split}.txt").write_text("".join(rec[split]), encoding="utf-8")
|
||||||
|
(output / f"det_{split}.txt").write_text("".join(det[split]), encoding="utf-8")
|
||||||
|
with (output / "ground_truth.jsonl").open("w", encoding="utf-8") as stream:
|
||||||
|
for row in metadata:
|
||||||
|
stream.write(json.dumps(row, ensure_ascii=False) + "\n")
|
||||||
|
manifest = {"source": "fully synthetic", "training_on_real_documents": False,
|
||||||
|
"seed": seed, "documents": count, "train_documents": count - len(validation),
|
||||||
|
"validation_documents": len(validation),
|
||||||
|
"recognition_crops": sum(len(items) for items in rec.values()),
|
||||||
|
"target_codes": list(TARGET_CODES)}
|
||||||
|
(output / "manifest.json").write_text(json.dumps(manifest, indent=2) + "\n", encoding="utf-8")
|
||||||
|
return manifest
|
||||||
|
|
||||||
|
|
||||||
|
def main() -> None:
|
||||||
|
parser = argparse.ArgumentParser(description=__doc__)
|
||||||
|
parser.add_argument("--out", type=Path, default=Path("data/synthetic-v1"))
|
||||||
|
parser.add_argument("--count", type=int, default=100)
|
||||||
|
parser.add_argument("--seed", type=int, default=20261007)
|
||||||
|
parser.add_argument("--font", type=Path)
|
||||||
|
args = parser.parse_args()
|
||||||
|
summary = generate(args.out, count=args.count, seed=args.seed, font_path=args.font)
|
||||||
|
print(f"Generated {summary['documents']} synthetic pages and "
|
||||||
|
f"{summary['recognition_crops']} labeled crops in {args.out}")
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
main()
|
||||||
@@ -0,0 +1,117 @@
|
|||||||
|
import json
|
||||||
|
from pathlib import Path
|
||||||
|
import tempfile
|
||||||
|
import unittest
|
||||||
|
from unittest.mock import patch
|
||||||
|
|
||||||
|
import cv2
|
||||||
|
import numpy as np
|
||||||
|
|
||||||
|
from ocr_compare.synthetic import TARGET_CODES, _render, generate
|
||||||
|
from ocr_compare.benchmark_synthetic import evaluate
|
||||||
|
|
||||||
|
|
||||||
|
class SyntheticDatasetTests(unittest.TestCase):
|
||||||
|
def test_document_level_split_and_exact_labels(self):
|
||||||
|
with tempfile.TemporaryDirectory() as directory:
|
||||||
|
output = Path(directory) / "dataset"
|
||||||
|
manifest = generate(output, count=6, seed=31415)
|
||||||
|
self.assertEqual(manifest["source"], "fully synthetic")
|
||||||
|
self.assertEqual(manifest["train_documents"], 5)
|
||||||
|
self.assertEqual(manifest["validation_documents"], 1)
|
||||||
|
rows = [json.loads(line) for line in (output / "ground_truth.jsonl").read_text().splitlines()]
|
||||||
|
self.assertEqual(len(rows), 6)
|
||||||
|
self.assertEqual({row["id"] for row in rows if row["split"] == "val"},
|
||||||
|
{"synthetic-00005"})
|
||||||
|
self.assertEqual(len((output / "det_train.txt").read_text().splitlines()), 5)
|
||||||
|
self.assertEqual(len((output / "det_val.txt").read_text().splitlines()), 1)
|
||||||
|
crop_count = 0
|
||||||
|
for row in rows:
|
||||||
|
self.assertEqual(set(row["fields"]), set(TARGET_CODES))
|
||||||
|
page = cv2.imread(str(output / row["image"]))
|
||||||
|
self.assertIsNotNone(page)
|
||||||
|
self.assertEqual(page.shape[:2], (row["height"], row["width"]))
|
||||||
|
for item in row["lines"]:
|
||||||
|
self.assertLessEqual(len(item["text"]), 25)
|
||||||
|
self.assertTrue((output / item["crop"]).is_file())
|
||||||
|
self.assertTrue(all(0 <= x < row["width"] and 0 <= y < row["height"]
|
||||||
|
for x, y in item["polygon"]))
|
||||||
|
crop_count += 1
|
||||||
|
self.assertEqual(crop_count, manifest["recognition_crops"])
|
||||||
|
for split in ("train", "val"):
|
||||||
|
for entry in (output / f"rec_{split}.txt").read_text().splitlines():
|
||||||
|
path, label = entry.split("\t", 1)
|
||||||
|
self.assertTrue((output / path).is_file())
|
||||||
|
self.assertEqual("synthetic-00005" in path, split == "val")
|
||||||
|
self.assertTrue(label)
|
||||||
|
|
||||||
|
def test_seed_repeats_pixels_and_values(self):
|
||||||
|
first, lines_a, values_a, hardness_a = _render(12345, None)
|
||||||
|
second, lines_b, values_b, hardness_b = _render(12345, None)
|
||||||
|
self.assertTrue(np.array_equal(first, second))
|
||||||
|
self.assertEqual(lines_a, lines_b)
|
||||||
|
self.assertEqual(values_a, values_b)
|
||||||
|
self.assertEqual(hardness_a, hardness_b)
|
||||||
|
|
||||||
|
def test_requires_a_validation_document_and_never_overwrites(self):
|
||||||
|
with tempfile.TemporaryDirectory() as directory:
|
||||||
|
output = Path(directory) / "dataset"
|
||||||
|
with self.assertRaises(ValueError):
|
||||||
|
generate(output, count=1, seed=1)
|
||||||
|
self.assertFalse(output.exists())
|
||||||
|
generate(output, count=2, seed=1)
|
||||||
|
with self.assertRaises(FileExistsError):
|
||||||
|
generate(output, count=2, seed=2)
|
||||||
|
|
||||||
|
def test_benchmark_separates_reading_from_assignment(self):
|
||||||
|
with tempfile.TemporaryDirectory() as directory:
|
||||||
|
output = Path(directory) / "dataset"
|
||||||
|
generate(output, count=2, seed=31415)
|
||||||
|
row = json.loads((output / "ground_truth.jsonl").read_text().splitlines()[-1])
|
||||||
|
readings = []
|
||||||
|
for item in row["lines"]:
|
||||||
|
if item["part"] != "value" or item["code"] not in TARGET_CODES:
|
||||||
|
continue
|
||||||
|
xs, ys = zip(*item["polygon"])
|
||||||
|
readings.append({"text": item["text"],
|
||||||
|
"box": [min(xs), min(ys), max(xs), max(ys)]})
|
||||||
|
fields = [{"code": code, "value": value} for code, value in row["fields"].items()
|
||||||
|
if code not in ("B", "2.2")]
|
||||||
|
fields.append({"code": "B", "value": "wrong"})
|
||||||
|
result = {"status": "ok", "lines": readings, "fields": fields}
|
||||||
|
with patch("ocr_compare.benchmark_synthetic.server._classic", return_value=result):
|
||||||
|
counts = evaluate(output, limit=1)
|
||||||
|
self.assertEqual(counts["value_lines"], 7)
|
||||||
|
self.assertEqual(counts["value_text_read"], 7)
|
||||||
|
self.assertEqual(counts["fields_exact"], 4)
|
||||||
|
self.assertEqual(counts["fields_wrong"], 1)
|
||||||
|
self.assertEqual(counts["fields_missing"], 1)
|
||||||
|
|
||||||
|
def test_benchmark_rejects_non_synthetic_manifest(self):
|
||||||
|
with tempfile.TemporaryDirectory() as directory:
|
||||||
|
output = Path(directory) / "dataset"
|
||||||
|
generate(output, count=2, seed=31415)
|
||||||
|
manifest_path = output / "manifest.json"
|
||||||
|
manifest = json.loads(manifest_path.read_text())
|
||||||
|
manifest["training_on_real_documents"] = True
|
||||||
|
manifest_path.write_text(json.dumps(manifest))
|
||||||
|
with self.assertRaisesRegex(ValueError, "generated datasets only"):
|
||||||
|
evaluate(output, limit=1)
|
||||||
|
|
||||||
|
def test_benchmark_counts_failed_documents_in_denominator(self):
|
||||||
|
with tempfile.TemporaryDirectory() as directory:
|
||||||
|
output = Path(directory) / "dataset"
|
||||||
|
generate(output, count=2, seed=31415)
|
||||||
|
with patch("ocr_compare.benchmark_synthetic.server._classic",
|
||||||
|
return_value={"status": "error"}):
|
||||||
|
counts = evaluate(output, limit=1)
|
||||||
|
self.assertEqual(counts["documents"], 1)
|
||||||
|
self.assertEqual(counts["failed_documents"], 1)
|
||||||
|
self.assertEqual(counts["value_lines"], 7)
|
||||||
|
self.assertEqual(counts["value_text_read"], 0)
|
||||||
|
self.assertEqual(counts["fields"], 6)
|
||||||
|
self.assertEqual(counts["fields_missing"], 6)
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
unittest.main()
|
||||||
Reference in New Issue
Block a user