Created
July 11, 2019 23:49
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Extracts the JPG image from a PDF *scan* and saves to a file; adapted for Python3 from Ned Batchelder's py2 code
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| #!/usr/bin/env python3 | |
| # Extract jpg's from pdf's. Quick and dirty. | |
| # Adapted from https://nedbatchelder.com/blog/200712/extracting_jpgs_from_pdfs.html | |
| import sys | |
| pdf = open(sys.argv[1], "rb").read() | |
| startmark = b"\xff\xd8" | |
| startfix = 0 | |
| endmark = b"\xff\xd9" | |
| endfix = 2 | |
| i = 0 | |
| njpg = 0 | |
| while True: | |
| istream = pdf.find(b"stream", i) | |
| if istream < 0: | |
| break | |
| istart = pdf.find(startmark, istream, istream + 20) | |
| if istart < 0: | |
| i = istream + 20 | |
| continue | |
| iend = pdf.find(b"endstream", istart) | |
| if iend < 0: | |
| raise Exception("Did not find end of stream!") | |
| iend = pdf.find(endmark, iend - 20) | |
| if iend < 0: | |
| raise Exception("Did not find end of JPG!") | |
| istart += startfix | |
| iend += endfix | |
| print("JPG %d from %d to %d" % (njpg, istart, iend)) | |
| jpg = pdf[istart:iend] | |
| jpgfile = open("jpg%d.jpg" % njpg, "wb") | |
| jpgfile.write(jpg) | |
| jpgfile.close() | |
| njpg += 1 | |
| i = iend |
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