#157 gscan2pdf generates large file size pdfs

pdf size (1)
André S

Congratulations for the software, It's so much easier to use than the other softwares in ubuntu and has a lot of more funcionalities. I like it a lot.
On the other hand, I noted that the pdf generated in gscan2pdf are a lot larger than simple-scan. The same document that occupies 1.7mb in gray-scale with 150dpi in simple-scan, in gscan2pdf, with the same resolution, occupies 5.5mb (that is a media using all the compression options). I know that that is a jpg quality option that can decrease even more the size file, but than the document becomes useless.
Am I the only one noting that?

thank you


  • Jeffrey Ratcliffe

    Which compression option are you using when saving the PDF?

    Can you attach test PDFs from simplescan and gscan2pdf so that I can see better what sort of image you are scanning?

  • André S

    André S - 2013-04-07

    Sure, i tried all the file compression options and the files generated are in the zi file. All the files were created with the option to reduce to 90 ppi, except one, marked in the zip file.



  • Jeffrey Ratcliffe

    The reason that the PDF from simple scan is smaller is that simple scan has save the images as black & white, rather than greyscale. If I import the PNG compressed PDF, threshold the pages and save, I get a PDF of 500kb - less than a third of the size of that from simple scan.

  • Jeffrey Ratcliffe

    • status: open --> closed-works-for-me

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