for for this you have to do it for each pageĢ) Select Image>Mode>Indexed>Use black and white 1 bit paletteĪny number of pages your pdf may have this will convert all to 1 bit Black and White.Įdit on : As per query raised by cipiricus Select Colour>Thresold and it is done your image will be black and white. Just install Gimp(preferably use appimage). (Extracting and processing images, as well as 'printing as pdf' removes OCR, but reducing size with ghostscript as above does not, so the "shrinking" can be applied before or after the OCR.) X-KDE-Submenu=PDF action: EXTRACT ALL pagesĮxec=bash -c 'pdf=$(pdftk "%u" burst) kdialog -title "Extract pages" -msgbox "Extracted! $pdf" ' Įxec=bash -c 'f="%u" pdf=$(pdftoppm "$f" "$_ocr.pdf" -l ron ' See here a set of Dolphin service menu actions for the various extraction options: Other variables can be used instead of tiff (which gives tif files), for example png or jpeg. What I prefer after a few trials is a CLI reliable albeit slower method, with a command like: pdftoppm MY_PDF.pdf NAME -tiff - as said here. But it can still be used by setting a new batch/range of pages to be extracted. Master PDF Editor can do this but on my machine it crashes after extracting about 80 images.
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