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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I imagine there is a more elegant solution. Please don’t use the same answer for two different questions. Instead answer one question and flag the second one add duplicate.
[gs-bugs] [Bug 697411] – Ghostscript – Command line print in silent producing grayscale output
Sign up using Email and Password. However, that gs code only converts to grayscale as asked in the question and still has large file size. More on that here: I tried using gs with the code listed hereand image quality is good with pdf text still there.
The following link refers to similar ideas: This code works fine for major cases see http: Post as a guest Name. Post as a guest Name. It requires gs which you seem to have but also pdftk. Handy if you don’t want to grayscale grayscal entire pdf.
Moreover, I would like to keep the text as text, without transforming the pages elements in pictures. However, it a PDF without a.
Making a PDF grayscale with ghostscript
Actually, if it comes from a scan, the only reasonable way is to use pdfimages and convert the underlying graphics. Dec 14 ’17 at Reuben Thomas 4 8. And experiment with the threshold setting. I tryed a lot of ghostecript things: Post as a guest Name.
bash – How to convert a color pdf to black-white? – Unix & Linux Stack Exchange
May be more efficient to handle them with ImageMagick in the first place. Or is it possible to normalize the PDF or fix the issue to prevent the Ghostscript message “Unable to convert color space Caution when using some of the superuser approaches, they convert the PDF to a rasterized version, so it’s no longer vector graphics.
Sign up or log in Sign up using Google. Email Required, but never shown. It gives you the option to choose the specific page numbers that you want to convert to grayscale. I am including the whole script here to avoid link rot:.
Well, this is the link: My shell script uses gs, convert, and img2pdf. I still haven’t found a way to convert that file to grayscale without resorting to manual, single-image conversion. GS does the magic that corel and cs5 denied to me due to a obscure “host application error. However, my method produces results with very good image quality and much smaller file size. Sign up using Facebook.
Sign up or log in Sign up using Google. Post as a guest Name.
I was eager to try this Google Knol. The GEX Model – http: If you crack into the file, you’ll find that most of the colors are determined through an RGB ICC based color ghostsctipt look for 8 0 R to find all the references to this colorspace. How to convert a color pdf to black-white? Are there other ways, for example, print to B-W pdf file? Great post and it grascale works in Windows with Ghostview http: Sign up using Facebook.