Converting JPG Documents to PDF using Linux Console
The query is about converting multiple JPEG files in a folder to a single PDF document. The solution involves using a concise one-liner command suggested in the comments to make the PDF. There is also an optional step of OCRing the output PDF. This approach is simpler than the original answer that required more commands and tools.
JPG (documents) to PDF (linux console)
I possess top-notch JPG files, which are essentially documents rather than photos or images, and predominantly consist of textual content.
Is it possible to transform, rotate, align, crop, solarize, and merge these documents before converting them into a PDF format?
It is common for scanned documents to appear slightly skewed or in a different perspective. There are software applications available, such as CamScanner, that can correct this issue.
Any way to do it in linux console ?
While there are numerous command line tools available for editing images, it seems that the real challenge lies in converting them to PDF format.
Here are the instructions to convert a JPEG to PDF, even if the parameters are unknown.
To install the imagemagick package in Ubuntu, use the command «sudo apt-get install imagemagick».
Check out the ScanTailor project as it is an excellent tool to prepare various scanned or photographed documents that are mostly text-based, like yours. It is perfect for getting your documents ready for OCR software, and for open source, tesseract-ocr is the best choice. If you require a CLI interface, you’ll have to modify the source code yourself, which is available on Github. Additionally, the tool supports batch processing, which is also quite powerful.
The GitHub repository for Scantailor can be found at the following URL: https://github.com/scantailor/scantailor/.
A short introduction for those who comprehend German is available at http://www.heise.de/open/artikel/Toolbox-Scan-Tailor-bringt-gescannte-Dokumente-in-Form-1787142.html.
Have you considered using imagemagick for scripted image processing? It’s commonly used as the standard and there may not be a comparable alternative available.
Merge multiple JPGs into single PDF in Linux, I used the following command to convert and merge all the JPG files in a directory to a single PDF file: convert *.jpg file.pdf The files in the directory are numbered from 1.jpg to 123.jpg. The conversion went fine but after converting
Linux Mint Cinnamon-Batch Convert .JPG to .PDF
Jpg to pdf without data loss
Trying to make such things:
Is there a way to convert images without losing data to avoid differences when comparing the source and extracted images in HEX?
To avoid using convert , you can opt for pdflatex .
An additional file, referred to as image.tex is required and can be found here.
\documentclass \usepackage[active,tightpage] \usepackage \PreviewMacro[>] <\includegraphics>\begin \includegraphics \end
Execute the command pdflatex image.tex to produce a PDF file named image.pdf.
Is there a complete JPEG file consisting of metadata and image data in JFIF/JPEG format embedded in the PDF? If not, extracting the image data exactly may not be sufficient as pdfimages would be required to rebuild the container, which may not be identical.
Changing the metadata can prevent sum comparisons with audio files and other tags, resulting in a comparable situation.
When facing such a circumstance, it is necessary to calculate hashes solely for the data component and not for the entire document.
Bash — How can I convert a series of images to a PDF, I have a scanning server I wrote in cgi/bash and want to be able to convert a bunch of images (all in one folder) to a pdf from the command line. How can that be done? img2pdf $(find . -iname ‘*.jpg’ | sort -V) -o ./document.pdf will give you document.pdf containing all images with jpg or JPG extension in the current dir — …
Convert jpg to pdf
While attempting to change .jpg to .pdf in Ubuntu 19.10.
joso@joso-Aspire-ES1-433:~$ convert ‘/home/joso/Desktop/Marticeva etaziranje/IMG_20200104_102541.jpg’ output.pdf convert: no decode delegate for this image format `JPG’ @ error/constitute.c/ReadImage/562. convert: no images defined `output.pdf’ @ error/convert.c/ConvertImageCommand/3273. I can open jpg file. In terminal:
joso@joso-Aspire-ES1-433:~$ file /home/joso/Desktop/Marticeva\ etaziranje/IMG_20200104_102541.jpg /home/joso/Desktop/Marticeva etaziranje/IMG_20200104_102541.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, manufacturer=HUAWEI, model=ATU-L21, xresolution=150, yresolution=158, resolutionunit=2, software=ATU-L21-user 8.0.0 HUAWEIATU-L21 156(C432) release-keys, datetime=2020:01:04 10:25:41, GPS-Data], baseline, precision 8, 3120x4160, components 3 joso@joso-Aspire-ES1-433:~$ joso@joso-Aspire-ES1-433:~$ cp /home/joso/Desktop/Marticeva\ etaziranje/IMG_20200104_102541.jpg foo.jpg; convert foo.jpg foo.pdf convert: no decode delegate for this image format JPG' @ error/constitute.c/ReadImage/562. convert: no images definedfoo.pdf' @ error/convert.c/ConvertImageCommand/3273. joso@joso-Aspire-ES1-433:~$ still the same, no success.
I tried with 2 other files:
joso@joso-Aspire-ES1-433:~$ convert '/home/joso/Pictures/IMG_20191214_120216.jpg' output.pdf convert: no decode delegate for this image format `JPG' @ error/constitute.c/ReadImage/562. convert: no images defined `output.pdf' @ error/convert.c/ConvertImageCommand/3273. joso@joso-Aspire-ES1-433:~$ convert '/home/joso/Pictures/John Selman2.jpeg' output.pdf convert: no decode delegate for this image format `JPEG' @ error/constitute.c/ReadImage/562. convert: no images defined `output.pdf' @ error/convert.c/ConvertImageCommand/3273. joso@joso-Aspire-ES1-433:~$ convert /home/joso/Pictures/IMG_20191214_120216.jpg output.pdf convert: no decode delegate for this image format `JPG' @ error/constitute.c/ReadImage/562. convert: no images defined `output.pdf' @ error/convert.c/ConvertImageCommand/3273. joso@joso-Aspire-ES1-433:~$ joso@joso-Aspire-ES1-433:~$ convert -compress jpeg /home/joso/Pictures/IMG_20191214_120216.jpg /home/joso/Pictures/output.pdf convert: no decode delegate for this image format JPG' @ error/constitute.c/ReadImage/562. convert: no images defined/home/joso/Pictures/output.pdf' @ error/convert.c/ConvertImageCommand/3273. Upon opening the file in an image viewer, file indicates that it is a typical JPG file.
$ file /home/joso/Desktop/Marticeva\ etaziranje/IMG_20200104_102541.jpg /home/joso/Desktop/Marticeva etaziranje/IMG_20200104_102541.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, manufacturer=HUAWEI, model=ATU-L21, xresolution=150, yresolution=158, resolutionunit=2, software=ATU-L21-user 8.0.0 HUAWEIATU-L21 156(C432) release-keys, datetime=2020:01:04 10:25:41, GPS-Data], baseline, precision 8, 3120x4160, components 3 I attempted this approach as recommended in the comments.
$ convert -compress jpeg /home/joso/Pictures/IMG_20191214_120216.jpg /home/joso/Pictures/output.pdf convert: no decode delegate for this image format JPG' @ error/constitute.c/ReadImage/562. convert: no images defined/home/joso/Pictures/output.pdf' @ error/convert.c/ConvertImageCommand/3273. Simplify the process by using Libre Office Draw or Impress to open your JPG file. From the menu, select «File» and then choose «Export as PDF» to save the file in the desired format.
sudo apt-get install imagemagick Utilize a code such as cd /path/to/workingdirectory/ on the files located within the WORKINGDIRECTORY.
convert input.jpg output.pdf In case the conversion function is not working due to permission issues, you need to modify the configuration file to allow it. To do so, add sudo nano /etc/ImageMagick-6/policy.xml and then disable as well as the JPG line.
Storing jpg images into a pdf file in a «lossless» way, So ideally I would like to be able to extract the original jpg files (maybe minus the metadata) from the pdf file, using, e.g., a linux command line too like pdfimages. My ideas so far: imagemagick convert. However, I am confused by
Convert a directory of JPEG files to a single PDF document
In a specific directory, I possess a multitude of JPEG files that I intend to convert to PDF and then merge into a singular file.
Opting for the command line would be my preference due to its faster processing.
Employ the convert directive by means of the imagemagick bundle.
convert *.jpg -auto-orient pictures.pdf A consolidated pdf file, comprising all the jpg files in the present directory, will be provided. The -auto-orient choice employs image’s EXIF data for image rotation.
sudo apt-get install imagemagick Listed references include Stack Overflow and available options in ImageMagick.
Please note that if your images are not numbered, they may appear out of order. To avoid this, it is recommended to name them with a numerical sequence such as filename01.jpg, filename02.jpg, and so on. It’s important to include leading zeros to ensure proper ordering, especially if you have 10 or more images. In case you have 100 or more images, consider using a three-digit sequence such as 001. 999.
Regrettably, when «packing» an image into a PDF using convert , the quality is reduced. To minimize this loss, it is recommended to include the original jpg in the PDF using img2pdf . It is worth noting that img2pdf also supports .png .
An alternative solution, proposed in the comments, involves utilizing img2pdf and condensing it into a shorter one-liner.
-
Make PDF
img2pdf *.jp* --output combined.pdf -
(optional) OCR the output PDF
ocrmypdf combined.pdf combined_ocr.pdf
Here are the answer commands in their original form, which require additional tools and commands.
- The purpose of this instruction is to produce a
pdfdocument from eachjpgpicture, while maintaining both the resolution and quality of the image.ls -1 ./*jpg | xargs -L1 -I <> img2pdf <> -o <>.pdf - This instruction will merge all the pages with the
pdfinto a single document.pdftk *.pdf cat output combined.pdf - In conclusion, I append an OCR (Optical Character Recognition) text layer to the scanned pdfs without compromising their quality. This enables them to become searchable.
pypdfocr combined.pdf
A substitute for utilizing pypdfocr is available.
`ocrmypdf combined.pdf combined_ocr.pdf` - The command will display files in a sequential order (1, 2, 3. ) and perform the conversion process on each file individually.
This method worked for me, but please be cautious. Using the +compress options will disable compression, which will lead to a larger PDF file size.
convert page1.jpg page2.jpg +compress file.pdf convert -rotate 90 page\*.jpg +compress file.pdf The +compress from ubuntuforums.org is beneficial in preventing hang-ups. It’s important to note that compression is turned off with the +compress option. When working on a particular machine, it appeared to hang indefinitely without +compress (although I didn’t wait to confirm). It’s recommended to read the imagemagick.org option -compress thoroughly and experiment with -compress < type>if slow compression or hanging issues persist. Keep in mind that results may vary.