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- compression - How to reduce the size of a pdf file? - Ask Ubuntu
If the PDF file consists entirely of image data; pdftk inputFile pdf burst mogrify -density 300 -format jpg -quality 20 pg_* pdf convert * jpg -auto-orient outputFile pdf The density value can match the density of the source image (eg 300 dpi), but the jpeg quality should be lower than the source image (e g 20)
- How to convert PDF to image? - Ask Ubuntu
To get a single page from gm convert, add [N] (with N the page number starting at 0) to the PDF name, ie gm convert foo pdf[11] out png to get the 12th page from the PDF For pdftoppm use -f N -singlefile , where N is the page number starting at 1, ie pdftoppm -f 12 -singlefile foo pdf out for the same result
- Is there a command line tool to bulk extract images from a pdf?
Pdfimages reads the PDF file PDF-file, scans one or more pages, and writes one PPM, PBM, or JPEG file for each image On newer versions of poppler-utils there is an all switch to extract to jpg or png: pdfimages -all input pdf images prefix will output files in the form prefix-nnn [png|jpg] in the images folder
- How can I reduce the file size of a scanned PDF file?
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1 4 -dDownsampleColorImages=true \ -dColorImageResolution=150 -dNOPAUSE -dBATCH -sOutputFile=output pdf input pdf This reduced the image resolution to 150dpi, cutting my file size in half Looking at the document, there was almost no noticeable loss of image quality
- Is there a simple way to identify if a PDF is scanned?
If a pdf file contains an image (inserted in a document alongside text or as whole pages, 'scanned pdf'), the file often (maybe always) contains the string Image , which can be found with the command line grep --color -a 'Image' filename pdf This will separate files which contain only text from those containing images (full page images as
- imagemagick - convert images to pdf - Ask Ubuntu
However the combined pdf is not giving me expected results, not the combination of the two I also tried making individual pdf files, then combining them using pdftk, with no luck convert books png book1 pdf convert books jpeg book2 pdf pdftk book1 pdf book2 pdf cat output combined pdf
- How can I add text and images (for example, a signature) to a PDF?
Open the pdf in LibreOffice Draw and copy paste there any image, including that of a signature (or Insert -Picture - From File), which then can be easily adjusted resized to fit the purpose After that, under File - 'Export as PDF'
- Extracting embedded images from a PDF - Ask Ubuntu
pdfimages is a PDF image extractor tool which saves the images in a PDF file to PPM, PBM, JPEG or JPEG 2000 file(s) format It's a part of the poppler-utils package, which you'll need to install Usage: pdfimages [options] <PDF-file> <image-root> option -all will extract images in original format
- Convert a directory of JPEG files to a single PDF document
It allows you to guarantee a minimum space between image borders and PDF page borders, to allow printing the PDF without problems It does not change the image data (So image quality is unaffected, the PDF file has about the same file size as the image, and you can re-extract the original images later with pdfimages -j file pdf img ) At the
- pdf - Convert an image from grayscale to binary - Ask Ubuntu
Your eps pdf viewer is rasterising the vector source to your displays resolution at its zoom level, i e at 200% on a 75dpi screen the effective dpi for a rasterisation that your viewer is doing is 150 and so on, so pick the zoomlevel you want the image to look clear at for processing etc and then set your conversion tools dpi accordingly
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