also check whether PDFs have text alongside images
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@ -437,17 +437,21 @@ class Collator:
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return self.collate_from_paths(srcs_matching_language)
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def is_single_image(page):
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blocks = page.get_text('blocks')
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return len(blocks) == 1 and blocks[0][6] == 1
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def pdf_images(pdf, force=False):
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images_by_page = [page.get_images() for page in pdf]
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if all(len(images) == 1 for images in images_by_page):
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return (pdf.extract_image(images[0][0]) for images in images_by_page)
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images_by_page = [(page.get_images(), is_single_image(page)) for page in pdf]
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if all(len(images) == 1 and single for (images, single) in images_by_page):
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return (pdf.extract_image(images[0][0]) for (images, _) in images_by_page)
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print("Checking PDF images the quick way failed, trying the slow way")
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def xref_or_image_generator():
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xref_mode = not force
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for (idx, page) in enumerate(pdf):
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page_images = page.get_image_info(xrefs=True)
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if len(page_images) == 1 and page_images[0]['xref'] != 0:
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if len(page_images) == 1 and page_images[0]['xref'] != 0 and is_single_image(page):
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xref = page_images[0]['xref']
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if xref_mode:
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yield xref
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