The issue when converting a PDF to true grayscale. At the (change shape SVG after processing through ghostscript command of. A bit late in the day, but the top answer doesn’t work for me with a different file. The underlying problem appears to be old code in Ghostscript, for which there is a. ?id= Bug ID: Summary: Command line print in silent producing grayscale output.

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It strikes me as funny, since gfayscale should also handle PDFs! BowPark 1, 8 25 It doesn’t look like it, could you post the whole script? Panda 85 1 1 7. Convert PDF image into true grayscale? Home Questions Tags Users Unanswered. It then applies the threshold filtering to produce a 1-bit image and uses ghostscript again to create a PDF.

Making a PDF grayscale with ghostscript | handyfloss

Sign up or log in Sign up using Google. However, running identify -verbose file. Is it possible to modify the pearl script that I can use it for a bunch of pdf files and don’t have to type in every single pdf file in a folder maybe including subfolders? This hint was very usefull to me, thanx a lot!


The GEX Model – http: Following the answers to this post I get the following script:. Unable to convert color space to Gray, reverting strategy to LeaveColorUnchanged.

Making a PDF grayscale with ghostscript

The gray-scale pdf file comes from scanning with gray-scale option, and the black-white scale pdf is required by OCR. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your ghostscriptt use of the website is subject to these policies.

Well, this is the link: And experiment with the threshold setting.

Don’t know if that will make your desired change possible or easy tho. I also had some scanned color pdfs and grayscale pdfs that Ghhostscript wanted to convert to bw.

Salvi Pascual 1, 12 The GEX Model – http: Actually I find it very flattering and undeserved. Could any of you gurus help me and provide a proper ghostscript command line that does the desired job? Now it works like a charm, thank you!! It is not flattering nor undeserved: Install pdftk apt-get install pdftk Once you have installed pdftk, save the script as ghostscri;t. Reuben Thomas 4 8. Something definitely doesn’t seem right with that script though.

I have a PDF obtained from scanning a paper doc. By using our site, you acknowledge that you have read and graysfale our Cookie PolicyPrivacy Policyand our Terms of Service. Post as a guest Name. Please don’t use the same answer for two different questions.


This appears to not be real grayscale. I am going to add the whole tutorial to Goggle Knol, obviously citing this webpage: Tim 26k 74 The following Python script will convert all PDF graysccale in a directory into grayscale, if called from within that directory: I am including the whole script here to avoid link rot: I still haven’t found a way to convert that file to grayscale without resorting to manual, single-image conversion.

Tim That’s not uncommon. However, that gs code only converts to grayscale as asked in the question and still has large file gyostscript. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.