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fixes for the parser.

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This commit is contained in:
jonaswinkler 2020-12-04 16:44:34 +01:00
parent 34bc4020c9
commit dab4b1253a
1 changed files with 25 additions and 4 deletions
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29
src/paperless_tesseract/parsers.py
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@ -83,13 +83,27 @@ class RasterisedDocumentParser(DocumentParser):
return None
def parse(self, document_path, mime_type):
mode = settings.OCR_MODE
text_original = get_text_from_pdf(document_path)
has_text = text_original and len(text_original) > 50
if settings.OCR_MODE == "skip_noarchive" and has_text:
if mode == "skip_noarchive" and has_text:
self.log("debug",
"Document has text, skipping OCRmyPDF entirely.")
self.text = text_original
return
if mode in ['skip', 'skip_noarchive'] and not has_text:
# upgrade to redo, since there appears to be no text in the
# document. This happens to some weird encrypted documents or
# documents with failed OCR attempts for which OCRmyPDF will
# still report that there actually is text in them.
self.log("debug",
"No text was found in the document and skip is "
"specified. Upgrading OCR mode to redo.")
mode = "redo"
archive_path = os.path.join(self.tempdir, "archive.pdf")
ocr_args = {
@ -108,12 +122,15 @@ class RasterisedDocumentParser(DocumentParser):
# Mode selection.
if settings.OCR_MODE in ['skip', 'skip_noarchive']:
if mode in ['skip', 'skip_noarchive']:
ocr_args['skip_text'] = True
elif settings.OCR_MODE == 'redo':
elif mode == 'redo':
ocr_args['redo_ocr'] = True
elif settings.OCR_MODE == 'force':
elif mode == 'force':
ocr_args['force_ocr'] = True
else:
raise ParseError(
f"Invalid ocr mode: {mode}")
if self.is_image(mime_type):
dpi = self.get_dpi(document_path)
@ -153,6 +170,10 @@ class RasterisedDocumentParser(DocumentParser):
self.text = get_text_from_pdf(archive_path)
except (InputFileError, EncryptedPdfError) as e:
self.log("debug",
f"Encountered an error: {e}. Trying to use text from "
f"original.")
# This happens with some PDFs when used with the redo_ocr option.
# This is not the end of the world, we'll just use what we already
# have in the document.