data_processing/01_deidentification/deidentify_batch.py

"""
================================================================================
脚本名称 (Script Name): deidentify_batch.py
原本用途 (Original Purpose): 
    高通量多进程眼底相片批量隐私脱敏流水线。自动提取视网膜有效圆形视场掩模（FOV Mask），抹黑外围边框与非眼球区域（Frame Blackout），并结合 EasyOCR 扫描角部敏感字符进行正则遮蔽。
适用数据集 (Target Dataset): 
    多中心大规模原始彩色眼底相片（CFP），包括北京同仁医院、浙二眼科、河北邯郸眼科等积累的数百万张未脱敏眼底图像。
作者与归属 (Author/Provenance): 
    李思成 (Lisicheng), 浙江大学多模态眼科团队
输入要求 (Input): 
    多中心未脱敏的原始 JPG/PNG 彩色眼底图像及目录路径
输出结果 (Output): 
    已剥离患者姓名、病历号、检查时间等隐私信息的脱敏眼底图像
依赖环境 (Dependencies): 
    opencv-python, easyocr, numpy, pillow, tqdm
================================================================================
"""

"""Batch de-identification for cohorts with confirmed pixel-level PII.

Original images are read-only. Processed images are written as opaque-ID JPEGs
under /data/team/lisicheng/new_data_deid and the manifest is updated to use
train_path for the affected cohorts.
"""

from __future__ import annotations

import argparse
import json
import math
import os
import tarfile
from pathlib import Path
from typing import Any

import cv2
import numpy as np

from deidentify_trial import (
    blackout_frame,
    deidentify_fundus_circle,
    deidentify_fundus_left_outside_circle,
    load_easyocr_reader,
    maybe_ocr_metadata,
    make_sheet,
    read_image,
    write_image,
)


DEFAULT_MANIFEST = Path(
    "/data/team/lisicheng/new_data_manifest/"
    "new_data_manifest_dedup_split_labeled_with_wds.parquet"
)
DEFAULT_OUT_ROOT = Path("/data/team/lisicheng/new_data_deid")
DEFAULT_TONGREN_METADATA = Path("/data/team/lisicheng/Dataser/tongren_metadata.csv")
DEID_COHORTS = (
    "tongren_95disease_fundus",
    "fundus90wer",
    "eryuan_fundus",
    "xiangya_bscan",
    "tongren_fundus",
    "tongren_external_fundus",
    "fq_testfundus",
    "fq_rawfundus",
    "fq_validfundus",
)
LEFT_ONLY_FUNDUS_COHORTS = {
    "tongren_fundus",
    "tongren_external_fundus",
    "fq_testfundus",
    "fq_rawfundus",
    "fq_validfundus",
}
FULL_CIRCLE_FUNDUS_COHORTS = {
    "tongren_95disease_fundus",
    "fundus90wer",
    "eryuan_fundus",
}


def main() -> None:
    args = parse_args()
    if args.command == "prepare":
        prepare_inputs(args)
    elif args.command == "process":
        process_inputs(args)
    elif args.command == "finalize":
        finalize_manifest(args)
    elif args.command == "qc":
        build_qc(args)
    else:
        raise ValueError(f"unknown command: {args.command}")


def prepare_inputs(args: argparse.Namespace) -> None:
    import pandas as pd

    args.out_root.mkdir(parents=True, exist_ok=True)
    meta_dir = args.out_root / "metadata"
    meta_dir.mkdir(parents=True, exist_ok=True)
    out_jsonl = args.input_jsonl or meta_dir / "deid_inputs.jsonl"

    df = pd.read_parquet(args.manifest)
    cohorts = tuple(args.cohorts or DEID_COHORTS)
    subset = df[df["cohort"].isin(cohorts)].copy()
    if args.limit:
        subset = subset.groupby("cohort", group_keys=False).head(args.limit)

    fields = ["image_id", "cohort", "file_path", "train_path", "rel_path", "modality"]
    missing = [field for field in fields if field not in subset.columns]
    if missing:
        raise KeyError(f"manifest missing columns: {missing}")

    tongren_meta = load_tongren_metadata(args.tongren_metadata)
    with out_jsonl.open("w", encoding="utf-8") as f:
        for row in subset[fields].to_dict("records"):
            meta = metadata_for_row(row, tongren_meta)
            row.update({f"ocr_{key}": value for key, value in meta.items()})
            f.write(json.dumps(row, ensure_ascii=False) + "\n")

    counts = subset.groupby("cohort").size().to_dict()
    print(json.dumps({"input_jsonl": str(out_jsonl), "counts": counts}, ensure_ascii=False))


def process_inputs(args: argparse.Namespace) -> None:
    meta_dir = args.out_root / "metadata"
    meta_dir.mkdir(parents=True, exist_ok=True)
    shard_name = f"{args.run_name}_shard{args.shard_index:03d}-of-{args.num_shards:03d}.jsonl"
    metadata_path = args.metadata_jsonl or meta_dir / shard_name
    if metadata_path.exists() and not args.overwrite_metadata:
        raise FileExistsError(f"metadata exists; use --overwrite-metadata: {metadata_path}")

    done_ids = load_done_ids(args.skip_done_metadata_dir, args.skip_done_metadata_glob)
    if done_ids:
        print(f"[resume] loaded {len(done_ids)} completed image_ids")

    reader = load_easyocr_reader(args.ocr)
    n_seen = 0
    n_skip = 0
    n_done = 0
    n_error = 0
    with args.input_jsonl.open("r", encoding="utf-8") as src, metadata_path.open(
        "w", encoding="utf-8"
    ) as meta_out:
        for idx, line in enumerate(src):
            if idx % args.num_shards != args.shard_index:
                continue
            if args.limit and n_seen >= args.limit:
                break
            n_seen += 1
            row = json.loads(line)
            if row.get("image_id") in done_ids:
                n_skip += 1
                continue
            try:
                result = process_one(row, args, reader)
                n_done += 1
            except Exception as exc:
                n_error += 1
                result = {
                    "image_id": row.get("image_id"),
                    "cohort": row.get("cohort"),
                    "ok": False,
                    "error": repr(exc),
                }
            meta_out.write(json.dumps(result, ensure_ascii=False) + "\n")
            if n_seen % args.log_every == 0:
                print(
                    f"[{args.shard_index}/{args.num_shards}] "
                    f"seen={n_seen} skip={n_skip} done={n_done} err={n_error}"
                )
    print(
        json.dumps(
            {
                "metadata_jsonl": str(metadata_path),
                "seen": n_seen,
                "skip": n_skip,
                "done": n_done,
                "error": n_error,
            },
            ensure_ascii=False,
        )
    )


def process_one(row: dict[str, Any], args: argparse.Namespace, reader: object | None) -> dict[str, Any]:
    cohort = row["cohort"]
    src_path = str(row.get("train_path") or row["file_path"])
    image_id = row["image_id"]
    out_path = args.out_root / "images" / cohort / f"{image_id}.jpg"
    out_path.parent.mkdir(parents=True, exist_ok=True)

    img = read_image_any(src_path)
    ocr_meta: dict[str, int | str] = existing_ocr_meta(row)
    circle_ok: bool | None = None
    circle_info: dict[str, Any] | None = None

    if cohort in FULL_CIRCLE_FUNDUS_COHORTS:
        if reader is not None and not ocr_meta:
            ocr_meta = maybe_ocr_metadata(img, reader)
        out_img, circle_ok, circle_info = deidentify_fundus_circle(
            img,
            radius_ratio=args.fundus_radius_ratio,
            threshold=args.fundus_threshold,
            open_kernel=args.fundus_open_kernel,
        )
        method = "fundus_circle_mask"
    elif cohort in LEFT_ONLY_FUNDUS_COHORTS:
        if reader is not None and not ocr_meta:
            ocr_meta = maybe_ocr_metadata(img, reader)
        out_img, circle_ok, circle_info = deidentify_fundus_left_outside_circle(
            img,
            radius_ratio=args.left_fundus_radius_ratio,
            left_ratio=args.left_fundus_ratio,
            threshold=args.fundus_threshold,
            open_kernel=args.fundus_open_kernel,
        )
        method = "fundus_left_outside_circle_mask_r0985_l055"
    elif cohort == "xiangya_bscan":
        out_img = blackout_frame(
            img,
            top=args.bscan_top,
            bottom=args.bscan_bottom,
            right=args.bscan_right,
        )
        method = "bscan_blackout_top10_bottom5_right2"
    else:
        raise ValueError(f"unsupported cohort: {cohort}")

    if not out_path.exists() or args.overwrite_images:
        write_image(out_path, out_img, quality=args.jpeg_quality)

    return {
        "image_id": image_id,
        "cohort": cohort,
        "ok": True,
        "source_path": src_path,
        "deid_path": str(out_path),
        "deid_method": method,
        "pii_masked": True,
        "ocr_age": ocr_meta.get("age"),
        "ocr_sex": ocr_meta.get("sex"),
        "ocr_eye": ocr_meta.get("eye"),
        "circle_ok": circle_ok,
        "circle_info": circle_info,
    }


def finalize_manifest(args: argparse.Namespace) -> None:
    import pandas as pd

    meta_files = sorted(args.metadata_dir.glob(args.metadata_glob))
    if not meta_files:
        raise FileNotFoundError(f"no metadata files match {args.metadata_dir}/{args.metadata_glob}")

    rows: list[dict[str, Any]] = []
    failed_rows: list[dict[str, Any]] = []
    for path in meta_files:
        with path.open("r", encoding="utf-8") as f:
            for line in f:
                try:
                    row = json.loads(line)
                except json.JSONDecodeError:
                    continue
                if row.get("ok"):
                    rows.append(row)
                elif row.get("image_id"):
                    failed_rows.append(row)
    meta = pd.DataFrame(rows)
    if meta.empty:
        raise ValueError("no successful deid metadata rows found")
    meta = meta.drop_duplicates("image_id", keep="last")

    df = pd.read_parquet(args.manifest)
    df = df.copy()
    if "train_path" not in df.columns:
        df["train_path"] = df["file_path"]
    else:
        df["train_path"] = df["train_path"].where(df["train_path"].notna(), df["file_path"])
    for col, default in [
        ("deid_path", None),
        ("pii_masked", False),
        ("deid_method", None),
        ("ocr_age", None),
        ("ocr_sex", None),
        ("ocr_eye", None),
    ]:
        if col not in df.columns:
            df[col] = default

    cols = ["image_id", "deid_path", "deid_method", "ocr_age", "ocr_sex", "ocr_eye"]
    merged = df.merge(meta[cols], on="image_id", how="left", suffixes=("", "_new"))
    has_deid = merged["deid_path_new"].notna()
    nullable_cols = [
        "deid_path",
        "deid_path_new",
        "deid_method",
        "deid_method_new",
        "ocr_age",
        "ocr_age_new",
        "ocr_sex",
        "ocr_sex_new",
        "ocr_eye",
        "ocr_eye_new",
    ]
    for col in nullable_cols:
        if col in merged.columns:
            merged[col] = merged[col].astype("object")
    merged.loc[has_deid, "train_path"] = merged.loc[has_deid, "deid_path_new"]
    merged.loc[has_deid, "deid_path"] = merged.loc[has_deid, "deid_path_new"]
    merged.loc[has_deid, "pii_masked"] = True
    for col in ["deid_method", "ocr_age", "ocr_sex", "ocr_eye"]:
        merged.loc[has_deid, col] = merged.loc[has_deid, f"{col}_new"]
    merged = merged.drop(columns=[f"{col}_new" for col in cols if col != "image_id"])

    required_cohorts = tuple(args.cohorts or DEID_COHORTS)
    missing_deid = merged["cohort"].isin(required_cohorts) & ~merged["pii_masked"]
    dropped_missing_deid = int(missing_deid.sum())
    if dropped_missing_deid:
        missing_path = args.out_manifest.with_suffix(".missing_deid.jsonl")
        missing_records = merged.loc[
            missing_deid, ["image_id", "cohort", "file_path", "rel_path"]
        ].to_dict("records")
        failure_by_id = {row.get("image_id"): row for row in failed_rows}
        with missing_path.open("w", encoding="utf-8") as f:
            for row in missing_records:
                failure = failure_by_id.get(row["image_id"])
                if failure:
                    row["error"] = failure.get("error")
                f.write(json.dumps(row, ensure_ascii=False) + "\n")
        if args.drop_missing_deid:
            merged = merged.loc[~missing_deid].copy()

    args.out_manifest.parent.mkdir(parents=True, exist_ok=True)
    merged.to_parquet(args.out_manifest, index=False)
    print(
        json.dumps(
            {
                "out_manifest": str(args.out_manifest),
                "rows": int(len(merged)),
                "pii_masked": int(merged["pii_masked"].sum()),
                "by_cohort": merged[merged["pii_masked"]].groupby("cohort").size().to_dict(),
                "dropped_missing_deid": dropped_missing_deid if args.drop_missing_deid else 0,
            },
            ensure_ascii=False,
        )
    )


def build_qc(args: argparse.Namespace) -> None:
    rows = []
    with args.metadata_jsonl.open("r", encoding="utf-8") as f:
        for line in f:
            row = json.loads(line)
            if args.cohort and row.get("cohort") != args.cohort:
                continue
            if row.get("ok"):
                rows.append(row)
    rows = rows[: args.n]
    groups = []
    for row in rows:
        src = read_image_any(str(row["source_path"]))
        deid = read_image(Path(row["deid_path"]))
        groups.append([src, deid])
    make_sheet(groups, ["source", "deid"], args.out, cell=args.cell)
    print(f"DONE -> {args.out}")


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    sub = parser.add_subparsers(dest="command", required=True)

    p = sub.add_parser("prepare")
    p.add_argument("--manifest", type=Path, default=DEFAULT_MANIFEST)
    p.add_argument("--out-root", type=Path, default=DEFAULT_OUT_ROOT)
    p.add_argument("--input-jsonl", type=Path, default=None)
    p.add_argument("--cohorts", nargs="+", default=list(DEID_COHORTS))
    p.add_argument("--tongren-metadata", type=Path, default=DEFAULT_TONGREN_METADATA)
    p.add_argument("--limit", type=int, default=None)

    p = sub.add_parser("process")
    p.add_argument("--input-jsonl", type=Path, required=True)
    p.add_argument("--out-root", type=Path, default=DEFAULT_OUT_ROOT)
    p.add_argument("--run-name", default="deid")
    p.add_argument("--metadata-jsonl", type=Path, default=None)
    p.add_argument("--overwrite-metadata", action="store_true")
    p.add_argument("--overwrite-images", action="store_true")
    p.add_argument("--skip-done-metadata-dir", type=Path, default=None)
    p.add_argument("--skip-done-metadata-glob", default="*.jsonl")
    p.add_argument("--num-shards", type=int, default=1)
    p.add_argument("--shard-index", type=int, default=0)
    p.add_argument("--limit", type=int, default=None)
    p.add_argument("--log-every", type=int, default=1000)
    p.add_argument("--ocr", action=argparse.BooleanOptionalAction, default=True)
    p.add_argument("--jpeg-quality", type=int, default=95)
    p.add_argument("--fundus-radius-ratio", type=float, default=0.97)
    p.add_argument("--left-fundus-radius-ratio", type=float, default=0.985)
    p.add_argument("--left-fundus-ratio", type=float, default=0.55)
    p.add_argument("--fundus-threshold", type=int, default=25)
    p.add_argument("--fundus-open-kernel", type=int, default=25)
    p.add_argument("--bscan-top", type=float, default=0.10)
    p.add_argument("--bscan-bottom", type=float, default=0.05)
    p.add_argument("--bscan-right", type=float, default=0.02)

    p = sub.add_parser("finalize")
    p.add_argument("--manifest", type=Path, default=DEFAULT_MANIFEST)
    p.add_argument("--metadata-dir", type=Path, default=DEFAULT_OUT_ROOT / "metadata")
    p.add_argument("--metadata-glob", default="deid_shard*.jsonl")
    p.add_argument("--cohorts", nargs="+", default=list(DEID_COHORTS))
    p.add_argument("--drop-missing-deid", action=argparse.BooleanOptionalAction, default=True)
    p.add_argument(
        "--out-manifest",
        type=Path,
        default=DEFAULT_MANIFEST.with_name(
            "new_data_manifest_dedup_split_labeled_with_wds_deid.parquet"
        ),
    )

    p = sub.add_parser("qc")
    p.add_argument("--metadata-jsonl", type=Path, required=True)
    p.add_argument("--out", type=Path, required=True)
    p.add_argument("--cohort", default=None)
    p.add_argument("--n", type=int, default=24)
    p.add_argument("--cell", type=int, default=256)

    return parser.parse_args()


def load_done_ids(metadata_dir: Path | None, metadata_glob: str) -> set[str]:
    if metadata_dir is None:
        return set()
    done: set[str] = set()
    for path in sorted(metadata_dir.glob(metadata_glob)):
        with path.open("r", encoding="utf-8") as f:
            for line in f:
                try:
                    row = json.loads(line)
                except json.JSONDecodeError:
                    continue
                if row.get("ok") and row.get("image_id"):
                    done.add(row["image_id"])
    return done


def read_image_any(path: str) -> Any:
    if "::" not in path:
        return read_image(Path(path))

    tar_path, member_name = path.split("::", 1)
    with tarfile.open(tar_path, "r:*") as tf:
        member = tf.getmember(member_name)
        fp = tf.extractfile(member)
        if fp is None:
            raise FileNotFoundError(path)
        data = fp.read()
    arr = np.frombuffer(data, dtype=np.uint8)
    img = cv2.imdecode(arr, cv2.IMREAD_COLOR)
    if img is None:
        raise ValueError(f"failed to decode image: {path}")
    return img


def load_tongren_metadata(path: Path) -> dict[str, dict[str, Any]]:
    if not path.exists():
        return {}
    import pandas as pd

    meta = pd.read_csv(path)
    out: dict[str, dict[str, Any]] = {}
    for row in meta.itertuples(index=False):
        filename = str(row.filename)
        sex = {"男": "M", "女": "F"}.get(str(row.sex), None)
        age = None if pd.isna(row.age) else int(row.age)
        eye = eye_from_seq(row.eye_seq)
        out[filename] = {k: v for k, v in {"age": age, "sex": sex, "eye": eye}.items() if v is not None}
    return out


def metadata_for_row(row: dict[str, Any], tongren_meta: dict[str, dict[str, Any]]) -> dict[str, Any]:
    if row.get("cohort") != "tongren_fundus":
        return {}
    name = str(row.get("rel_path") or "")
    if not name:
        path = str(row.get("train_path") or row.get("file_path") or "")
        name = path.split("::", 1)[1] if "::" in path else Path(path).name
    return tongren_meta.get(name, {})


def eye_from_seq(value: Any) -> str | None:
    if value is None or (isinstance(value, float) and math.isnan(value)):
        return None
    text = str(int(value)) if isinstance(value, float) else str(value)
    if text == "1":
        return "OD"
    if text == "2":
        return "OS"
    return None


def existing_ocr_meta(row: dict[str, Any]) -> dict[str, int | str]:
    meta: dict[str, int | str] = {}
    for src_key, dst_key in [("ocr_age", "age"), ("ocr_sex", "sex"), ("ocr_eye", "eye")]:
        value = row.get(src_key)
        if value is None:
            continue
        if isinstance(value, float) and math.isnan(value):
            continue
        if value == "":
            continue
        if dst_key == "age":
            value = int(value)
        meta[dst_key] = value
    return meta


if __name__ == "__main__":
    os.environ.setdefault("PYTHONIOENCODING", "utf-8")
    main()