Converting JP2 to PDF?

GrannyGrump · 04-16-2018, 03:43 AM

I have a set of 745 image scans in JP2 format (jpeg 2000) of a very large book. Obtained from archive.org. Unfortunately the PDF from that site is not downloadable due to enormous size of 1.8 GB --- it keeps timing out. (reported to site admin, and they say not working due to file size, so probably not going to get fixed)

I would like to convert the images to PDF, to use for proof-reading, so it does not have to be very high quality, but must be readable. It can be in sections, does not have to be one huge pdf file.

Does anyone have a recommendation for an online converter with no size limit, or a FREE easy-to-use standalone application available for download?

Doitsu · 04-16-2018, 11:56 AM

If you're familiar with running command line tools you could convert the .jp2 files with ImageMagick (freeware).

Install ImageMagick.
Open a command prompt window.
Use the cd command to change to the folder that contains the .jp2 files. E.g.
Code:
```
cd c:\images
```
Enter the following command:
Code:
```
convert *.jp2 book.pdf
```

However, since the conversion is very slow (about 1-2 minutes for 10 .jp2 files) and produces rather large .pdf files (about 40MB for 10 .jp2 files), you might want to convert the book in batches.

Marinolino · 04-16-2018, 12:20 PM

There are usually a fully functional 15-30 days free-trials for Adobe Acrobat, Abbyy Finereader, PDFelement 6 Pro, Foxit Editor etc. usually just with an applied watermark which could be stripped off later on, or as is still the case with Abbyy enforcing 100 pages total restriction that could e.g. be circumvented by using several computers or OS, reinstalled OS, virtual machines etc.

There are also free OCR solutions like Topocr, Freeocr ...

https://www.makeuseof.com/tag/top-5-...-into-text-nb/

https://windowsreport.com/ocr-software-windows-10/

Some Pdf conversion tips on Willus' k2pdfopt pages.

http://www.willus.com/k2pdfopt/pdf_conversion.shtml

Tex2002ans · 04-16-2018, 05:07 PM

Yep, I agree with Doitsu, ImageMagick is probably your best bet.

Could you attach some of these JP2s (maybe 10 pages) into a ZIP so we could fiddle around? (Or just link to the Archive.org page?)

Another potential workflow is to use ImageMagick to convert from JPG2000 -> TIFF, then import those into ScanTailor (which can do a lot of the Normalization/Cropping + B/W conversions).

doubleshuffle · 04-16-2018, 05:39 PM

IrfanView (Freeware) can batch convert jp2 to any image format you like quite fast. You can then use the free jpg to pdf converter to turn the images into a pdf. (The converter is misnamed: you can use png files just as well). I've done it that way quite a few times, and it works nice and quickly.

https://www.irfanview.com/

http://www.freepdfsolutions.com/free...converter.html

EDIT: For reference: after I posted this, I started a conversion the way I described. 230 pages, the pdf file was ready three minutes ago, so those 230 pages took under twenty minutes. So your 745 pages should be done in about an hour.

GrannyGrump · 04-17-2018, 04:51 AM

Whee! This is a nice handful of options. Thank you so much, guys!

I will be trying the FreePdfSolutions and ImageMagick. For this project, I don't need OCR or very high quality, it will only be needed as a basis for proof-reading, so whatever works fast will do this time.

Thanks again to all, it is always a good thing to have multiple tools in the chest.

gG

Tex2002ans · 04-17-2018, 06:24 PM

Quote:

Originally Posted by GrannyGrump

Whee! This is a nice handful of options. Thank you so much, guys!

Always willing to help you, GrannyGrump.

Well let us know how it goes or if you get stuck. I know some of that ImageMagick documentation/posts can be a beast.

Side Note: I also know that GIMP is finally introducing batch processing in GIMP v2.10 (coming soon, they released RC2 today).

PS. PM me all the deats... I miss you! :P

j.p.s · 04-20-2018, 11:27 AM

wget is a cross platform web download utility that can continue interrupted downloads.

Also, the ImageMagick utility display will display JPEG2000 images, so conversion might not be needed.

virtualking16 · 06-04-2018, 04:41 AM

I am personally using ImageMagick for such a purpose and it works best for me so I never tried others

grumbles · 06-27-2018, 11:03 AM

I've commented on this elsewhere but XnView and XnConvert are cross platform programs (Windows, Linux and Mac) that can convert to and from a large number of formats. There is also a command line converter, NConvert.

I use both XnView and XnConvert to prepare images for OCR. Usually cropping headers and page numbers after running the images through ScanTailor. It has always (almost always) worked well for me.

04-16-2018, 03:43 AM	#1
GrannyGrump Obsessively Dedicated... Posts: 3,200 Karma: 34977896 Join Date: May 2011 Location: JAPAN (US expatriate) Device: Sony PRS-T2, ADE on PC	Converting JP2 to PDF? I have a set of 745 image scans in JP2 format (jpeg 2000) of a very large book. Obtained from archive.org. Unfortunately the PDF from that site is not downloadable due to enormous size of 1.8 GB --- it keeps timing out. (reported to site admin, and they say not working due to file size, so probably not going to get fixed) I would like to convert the images to PDF, to use for proof-reading, so it does not have to be very high quality, but must be readable. It can be in sections, does not have to be one huge pdf file. Does anyone have a recommendation for an online converter with no size limit, or a FREE easy-to-use standalone application available for download?

04-16-2018, 11:56 AM	#2
Doitsu Grand Sorcerer Posts: 5,584 Karma: 22735033 Join Date: Dec 2010 Device: Kindle PW2	If you're familiar with running command line tools you could convert the .jp2 files with ImageMagick (freeware). Install ImageMagick. Open a command prompt window. Use the cd command to change to the folder that contains the .jp2 files. E.g. Code: cd c:\images Enter the following command: Code: convert *.jp2 book.pdf However, since the conversion is very slow (about 1-2 minutes for 10 .jp2 files) and produces rather large .pdf files (about 40MB for 10 .jp2 files), you might want to convert the book in batches.

04-16-2018, 12:20 PM	#3
Marinolino Groupie Posts: 184 Karma: 2019866 Join Date: Feb 2018 Device: Kobo Aura-One (using KOReader app), Boox Note-3, iPad(s)	There are usually a fully functional 15-30 days free-trials for Adobe Acrobat, Abbyy Finereader, PDFelement 6 Pro, Foxit Editor etc. usually just with an applied watermark which could be stripped off later on, or as is still the case with Abbyy enforcing 100 pages total restriction that could e.g. be circumvented by using several computers or OS, reinstalled OS, virtual machines etc. There are also free OCR solutions like Topocr, Freeocr ... https://www.makeuseof.com/tag/top-5-...-into-text-nb/ https://windowsreport.com/ocr-software-windows-10/ Some Pdf conversion tips on Willus' k2pdfopt pages. http://www.willus.com/k2pdfopt/pdf_conversion.shtml Last edited by Marinolino; 04-16-2018 at 05:51 PM.

04-16-2018, 05:39 PM	#5
doubleshuffle Unicycle Daredevil Posts: 13,923 Karma: 185041098 Join Date: Jan 2011 Location: Planet of the Pudding Brains Device: Aura HD (R.I.P. After six years the USB socket died.) tolino shine 3	IrfanView (Freeware) can batch convert jp2 to any image format you like quite fast. You can then use the free jpg to pdf converter to turn the images into a pdf. (The converter is misnamed: you can use png files just as well). I've done it that way quite a few times, and it works nice and quickly. https://www.irfanview.com/ http://www.freepdfsolutions.com/free...converter.html EDIT: For reference: after I posted this, I started a conversion the way I described. 230 pages, the pdf file was ready three minutes ago, so those 230 pages took under twenty minutes. So your 745 pages should be done in about an hour. Last edited by doubleshuffle; 04-16-2018 at 06:02 PM.

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04-16-2018, 05:07 PM	#4
Tex2002ans Wizard Posts: 2,297 Karma: 12126329 Join Date: Jul 2012 Device: Kobo Forma, Nook	Yep, I agree with Doitsu, ImageMagick is probably your best bet. Could you attach some of these JP2s (maybe 10 pages) into a ZIP so we could fiddle around? (Or just link to the Archive.org page?) Another potential workflow is to use ImageMagick to convert from JPG2000 -> TIFF, then import those into ScanTailor (which can do a lot of the Normalization/Cropping + B/W conversions).

04-17-2018, 04:51 AM	#6
GrannyGrump Obsessively Dedicated... Posts: 3,200 Karma: 34977896 Join Date: May 2011 Location: JAPAN (US expatriate) Device: Sony PRS-T2, ADE on PC	Whee! This is a nice handful of options. Thank you so much, guys! I will be trying the FreePdfSolutions and ImageMagick. For this project, I don't need OCR or very high quality, it will only be needed as a basis for proof-reading, so whatever works fast will do this time. Thanks again to all, it is always a good thing to have multiple tools in the chest. gG

04-20-2018, 11:27 AM	#8
j.p.s Grand Sorcerer Posts: 5,278 Karma: 98804578 Join Date: Apr 2011 Device: pb360	wget is a cross platform web download utility that can continue interrupted downloads. Also, the ImageMagick utility display will display JPEG2000 images, so conversion might not be needed.

06-04-2018, 04:41 AM	#9
virtualking16 Junior Member Posts: 2 Karma: 10 Join Date: Jun 2018 Device: none	I am personally using ImageMagick for such a purpose and it works best for me so I never tried others

06-27-2018, 11:03 AM	#10
grumbles Addict Posts: 238 Karma: 1500000 Join Date: Nov 2009 Location: Toronto Device: Pandigital Novel (Black), T-2 and 3, Nexus 7	I've commented on this elsewhere but XnView and XnConvert are cross platform programs (Windows, Linux and Mac) that can convert to and from a large number of formats. There is also a command line converter, NConvert. I use both XnView and XnConvert to prepare images for OCR. Usually cropping headers and page numbers after running the images through ScanTailor. It has always (almost always) worked well for me.