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fix(ocr): avoid to swallow tesseract errors causing orientation detection failures

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Signed-off-by: Clément Doumouro <clement.doumouro@gmail.com>
This commit is contained in:
Clément Doumouro 2025-04-09 11:31:44 +02:00
parent c1ac22947f
commit 1181338737
1 changed files with 21 additions and 5 deletions
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22
docling/models/tesseract_ocr_cli_model.py
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@ -2,6 +2,7 @@ import csv
import io
import logging
import os
import subprocess
import tempfile
from collections.abc import Iterable
from pathlib import Path
@ -150,9 +151,8 @@ class TesseractOcrCliModel(BaseOcrModel):
cmd = [self.options.tesseract_cmd]
cmd.extend(["--psm", "0", "-l", "osd", ifilename, "stdout"])
_log.info("command: {}".format(" ".join(cmd)))
proc = Popen(cmd, stdout=PIPE, stderr=DEVNULL)
output, _ = proc.communicate()
decoded_data = output.decode("utf-8")
output = subprocess.run(cmd, capture_output=True, check=True)
decoded_data = output.stdout.decode("utf-8")
df_detected = pd.read_csv(
io.StringIO(decoded_data), sep=":", header=None, names=["key", "value"]
)
@ -231,14 +231,30 @@ class TesseractOcrCliModel(BaseOcrModel):
) as image_file:
fname = image_file.name
high_res_image.save(image_file)
try:
df_osd = self._perform_osd(fname)
except subprocess.CalledProcessError as exc:
_log.error(
"OSD failed for: %s with error:\n %s",
image_file,
exc.stderr,
)
continue
doc_orientation = _parse_orientation(df_osd)
if doc_orientation != 0:
high_res_image = high_res_image.rotate(
-doc_orientation, expand=True
)
high_res_image.save(fname)
try:
df_result = self._run_tesseract(fname, df_osd)
except subprocess.CalledProcessError as exc:
_log.error(
"tesseract OCR failed for: %s with error:\n %s",
image_file,
exc.stderr,
)
continue
finally:
if os.path.exists(fname):
os.remove(fname)