def make_intermediate_images(
page_context: PageContext, orientation_correction: int
) -> Tuple[Path, Optional[Path]]:
options = page_context.options
ocr_image = preprocess_out = None
rasterize_out = rasterize(
page_context.origin,
page_context,
correction=orientation_correction,
remove_vectors=False,
)
if not any([options.clean, options.clean_final, options.remove_vectors]):
ocr_image = preprocess_out = preprocess(
page_context,
rasterize_out,
options.remove_background,
options.deskew,
clean=False,
)
else:
if not options.lossless_reconstruction:
preprocess_out = preprocess(
page_context,
rasterize_out,
options.remove_background,
options.deskew,
clean=options.clean_final,
)
if options.remove_vectors:
rasterize_ocr_out = rasterize(
page_context.origin,
page_context,
correction=orientation_correction,
remove_vectors=True,
output_tag='_ocr',
)
else:
rasterize_ocr_out = rasterize_out
if (
preprocess_out
and rasterize_ocr_out == rasterize_out
and options.clean == options.clean_final
):
# Optimization: image for OCR is identical to presentation image
ocr_image = preprocess_out
else:
ocr_image = preprocess(
page_context,
rasterize_ocr_out,
options.remove_background,
options.deskew,
clean=options.clean,
)
return ocr_image, preprocess_out
def exec_page_sync(page_context):
options = page_context.options
tls.pageno = page_context.pageno + 1
orientation_correction = 0
pdf_page_from_image_out = None
ocr_out = None
text_out = None
if is_ocr_required(page_context):
if options.rotate_pages:
# Rasterize
rasterize_preview_out = rasterize_preview(page_context.origin,
page_context)
orientation_correction = get_orientation_correction(
rasterize_preview_out, page_context)
rasterize_out = rasterize(
page_context.origin,
page_context,
correction=orientation_correction,
remove_vectors=False,
)
if not any(
[options.clean, options.clean_final, options.remove_vectors]):
ocr_image = preprocess_out = preprocess(
page_context,
rasterize_out,
options.remove_background,
options.deskew,
clean=False,
)
else:
if not options.lossless_reconstruction:
preprocess_out = preprocess(
page_context,
rasterize_out,
options.remove_background,
options.deskew,
clean=options.clean_final,
)
if options.remove_vectors:
rasterize_ocr_out = rasterize(
page_context.origin,
page_context,
correction=orientation_correction,
remove_vectors=True,
output_tag='_ocr',
)
else:
rasterize_ocr_out = rasterize_out
ocr_image = preprocess(
page_context,
rasterize_ocr_out,
options.remove_background,
options.deskew,
clean=options.clean,
)
ocr_image_out = create_ocr_image(ocr_image, page_context)
pdf_page_from_image_out = None
if not options.lossless_reconstruction:
visible_image_out = preprocess_out
if should_visible_page_image_use_jpg(page_context.pageinfo):
visible_image_out = create_visible_page_jpg(
visible_image_out, page_context)
visible_image_out = (
page_context.plugin_manager.hook.filter_page_image(
page=page_context, image_filename=Path(visible_image_out))
or visible_image_out)
pdf_page_from_image_out = create_pdf_page_from_image(
visible_image_out, page_context)
if options.pdf_renderer == 'hocr':
(hocr_out, text_out) = ocr_engine_hocr(ocr_image_out, page_context)
ocr_out = render_hocr_page(hocr_out, page_context)
if options.pdf_renderer == 'sandwich':
(ocr_out,
text_out) = ocr_engine_textonly_pdf(ocr_image_out, page_context)
return PageResult(
pageno=page_context.pageno,
pdf_page_from_image=pdf_page_from_image_out,
ocr=ocr_out,
text=text_out,
orientation_correction=orientation_correction,
)