output file much bigger (7x), because not original embedded image files copied

[alphablue52]

Hello,
first thanks for the great work with this script. It made me work with OCR again at all after 10 years of frustrated absence :-)
Only one negative thing: Most of my PDFs come from a Canon ImageRunner scan, and are very good in quality vs. size. OCR gives great results, but the output PDFs are 7-8x bigger than input. As far as I can see, the embedded images get recompressed to JPEG, while the original is /CCITTFaxDecode.
If this is because of PDF/A compatibility, I suggest to add an option for non-PDF/A output.

You can download input.pdf and output.pdf here:
https://www.dropbox.com/l/KYlpYRiSs6IjWVOmF1fX39

Here is the output of the script with -g option.

~/bin/OCRmyPDF-2.0-stable$ sh OCRmyPDF.sh -g -l deu input.pdf output.pdf
OCRmyPDF version: v2.0-stable
Arguments: -g -l deu input.pdf output.pdf

Checking if all dependencies are installed

ImageMagick version:
Version: ImageMagick 6.7.7-10 2013-09-10 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP

---

GNU Parallel version:
GNU parallel 20130622
Copyright (C) 2007,2008,2009,2010,2011,2012,2013 Ole Tange and Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
GNU parallel comes with no warranty.

Web site: http://www.gnu.org/software/parallel

When using GNU Parallel for a publication please cite:

O. Tange (2011): GNU Parallel - The Command-Line Power Tool,

;login: The USENIX Magazine, February 2011:42-47.

Poppler-utils version:
pdfimages version 0.24.1
Copyright 2005-2013 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC
pdftoppm version 0.24.1
Copyright 2005-2013 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC
pdffonts version 0.24.1
Copyright 2005-2013 The Poppler Developers - http://poppler.freedesktop.org

Copyright 1996-2011 Glyph & Cog, LLC

unpaper version:

OCRmyPDF.sh: 190: OCRmyPDF.sh: unpaper: not found

tesseract version:
tesseract 3.02.01
leptonica-1.69
libgif 4.1.6 : libjpeg 8d : libpng 1.2.49 : libtiff 4.0.2 : zlib 1.2.8

---

python2 version:

Python 2.7.5+

Ghostscript version:

9.10

Java version:
java version "1.7.0_51"
OpenJDK Runtime Environment (IcedTea 2.4.4) (7u51-2.4.4-0ubuntu0.13.10.1)

OpenJDK 64-Bit Server VM (build 24.45-b08, mixed mode)

Created temporary folder: "/tmp/tmp.X82OQourlI"
Input file: Extracting size of each page (in pt)
Processing page 0001 / 0014
Page 0001: Size 842x595 (h_w in pt)
Page 0001: Expecting exactly 1 image covering the whole page (found 3). Cannot compute dpi value.
Page 0001: Continuing anyway, assuming a default resolution of 300 dpi
Page 0001: Extracting image as ppm file (300 dpi)
Page 0001: Performing OCR
Page 0001: Embedding text in PDF
Page 0001: Embedding text in PDF (debug page)
Processing page 0002 / 0014
Page 0002: Size 842x595 (h_w in pt)
Page 0002: Expecting exactly 1 image covering the whole page (found 2). Cannot compute dpi value.
Page 0002: Continuing anyway, assuming a default resolution of 300 dpi
Page 0002: Extracting image as ppm file (300 dpi)
Page 0002: Performing OCR
Page 0002: Embedding text in PDF
Page 0002: Embedding text in PDF (debug page)
Processing page 0003 / 0014
Page 0003: Size 842x595 (h_w in pt)
Page 0003: Expecting exactly 1 image covering the whole page (found 3). Cannot compute dpi value.
Page 0003: Continuing anyway, assuming a default resolution of 300 dpi
Page 0003: Extracting image as ppm file (300 dpi)
Page 0003: Performing OCR
Page 0003: Embedding text in PDF
Page 0003: Embedding text in PDF (debug page)
Processing page 0004 / 0014
Page 0004: Size 842x595 (h_w in pt)
Page 0004: Expecting exactly 1 image covering the whole page (found 2). Cannot compute dpi value.
Page 0004: Continuing anyway, assuming a default resolution of 300 dpi
Page 0004: Extracting image as ppm file (300 dpi)
Page 0004: Performing OCR
Page 0004: Embedding text in PDF
Page 0004: Embedding text in PDF (debug page)
Processing page 0005 / 0014
Page 0005: Size 842x595 (h_w in pt)
Page 0005: Expecting exactly 1 image covering the whole page (found 2). Cannot compute dpi value.
Page 0005: Continuing anyway, assuming a default resolution of 300 dpi
Page 0005: Extracting image as ppm file (300 dpi)
Page 0005: Performing OCR
Page 0005: Embedding text in PDF
Page 0005: Embedding text in PDF (debug page)
Processing page 0006 / 0014
Page 0006: Size 842x595 (h_w in pt)
Page 0006: Expecting exactly 1 image covering the whole page (found 3). Cannot compute dpi value.
Page 0006: Continuing anyway, assuming a default resolution of 300 dpi
Page 0006: Extracting image as ppm file (300 dpi)
Page 0006: Performing OCR
Page 0006: Embedding text in PDF
Page 0006: Embedding text in PDF (debug page)
Processing page 0007 / 0014
Page 0007: Size 842x595 (h_w in pt)
Page 0007: Expecting exactly 1 image covering the whole page (found 3). Cannot compute dpi value.
Page 0007: Continuing anyway, assuming a default resolution of 300 dpi
Page 0007: Extracting image as ppm file (300 dpi)
Page 0007: Performing OCR
Page 0007: Embedding text in PDF
Page 0007: Embedding text in PDF (debug page)
Processing page 0008 / 0014
Page 0008: Size 842x595 (h_w in pt)
Page 0008: Expecting exactly 1 image covering the whole page (found 8). Cannot compute dpi value.
Page 0008: Continuing anyway, assuming a default resolution of 300 dpi
Page 0008: Extracting image as ppm file (300 dpi)
Page 0008: Performing OCR
Page 0008: Embedding text in PDF
Page 0008: Embedding text in PDF (debug page)
Processing page 0009 / 0014
Page 0009: Size 842x595 (h_w in pt)
Page 0009: Expecting exactly 1 image covering the whole page (found 5). Cannot compute dpi value.
Page 0009: Continuing anyway, assuming a default resolution of 300 dpi
Page 0009: Extracting image as ppm file (300 dpi)
Page 0009: Performing OCR
Page 0009: Embedding text in PDF
Page 0009: Embedding text in PDF (debug page)
Processing page 0010 / 0014
Page 0010: Size 842x595 (h_w in pt)
Page 0010: Expecting exactly 1 image covering the whole page (found 4). Cannot compute dpi value.
Page 0010: Continuing anyway, assuming a default resolution of 300 dpi
Page 0010: Extracting image as ppm file (300 dpi)
Page 0010: Performing OCR
Page 0010: Embedding text in PDF
Page 0010: Embedding text in PDF (debug page)
Processing page 0011 / 0014
Page 0011: Size 842x595 (h_w in pt)
Page 0011: Expecting exactly 1 image covering the whole page (found 4). Cannot compute dpi value.
Page 0011: Continuing anyway, assuming a default resolution of 300 dpi
Page 0011: Extracting image as ppm file (300 dpi)
Page 0011: Performing OCR
Page 0011: Embedding text in PDF
Page 0011: Embedding text in PDF (debug page)
Processing page 0012 / 0014
Page 0012: Size 842x595 (h_w in pt)
Page 0012: Expecting exactly 1 image covering the whole page (found 3). Cannot compute dpi value.
Page 0012: Continuing anyway, assuming a default resolution of 300 dpi
Page 0012: Extracting image as ppm file (300 dpi)
Page 0012: Performing OCR
Page 0012: Embedding text in PDF
Page 0012: Embedding text in PDF (debug page)
Processing page 0013 / 0014
Page 0013: Size 842x595 (h_w in pt)
Page 0013: Expecting exactly 1 image covering the whole page (found 4). Cannot compute dpi value.
Page 0013: Continuing anyway, assuming a default resolution of 300 dpi
Page 0013: Extracting image as ppm file (300 dpi)
Page 0013: Performing OCR
Page 0013: Embedding text in PDF
Page 0013: Embedding text in PDF (debug page)
Processing page 0014 / 0014
Page 0014: Size 842x595 (h_w in pt)
Page 0014: Size 1240x1753 (in pixel)
Page 0014: Low image resolution detected (150 dpi). If needed, please use the "-o" to try to get better OCR results.
Page 0014: Extracting image as pgm file (150 dpi)
Page 0014: Performing OCR
Page 0014: Embedding text in PDF
Page 0014: Embedding text in PDF (debug page)
Output file: Concatenating all pages to the final PDF/A file
Output file: Checking compliance to PDF/A standard
The full validation log is available here: "/tmp/tmp.X82OQourlI/pdf_validation.log"
Output file: The generated PDF/A file is VALID
Script took 20 seconds

[fritz-hh]

Thanks for your problem report. I will try to solve that in v3.x.
Please do not remove the files from dropbox !!! Thanks.

[gunnicom]

Is there a fast way to change the code here locally, to not reconvert the images? As example a 3MB pdf now grows to 25MB and thats really big for alle the pdf we would like to convert.