I scanned a heap of documents to PDF format (I now realise if id originaly scanned to JPG I never would have encountered any problems, but anyway.... ).
I was using irfanview to quickly rotate and/or crop then save as. I found that because Ifranview will scroll through a directory I could get through a lot of documents very quickly.
I have now discovered that all those modified PDF files look terrible because they are now 96dpi instead of the original 200/300dpi (I originally thought they were bad because of wrong printer scan DPI settings).
Even though the PDF save as side box settings says it is lossless, it actually saves to the viewing DPI in the settings. Say a PDF is 300dpi and I want to rotate or crop, then I have to change the dpi settings to the same quality in Irfranview. Quality is good, but file size is now double the original. Plus doing it this way means I first need to check the dpi of the file to be changed then match it in Irfranview, then repeat for every file. This means that there is no point using Irfanview any more because that way is slow and increases file sizes.
I really liked being able to scroll through a directory of many files and crop/rotate the files that need it.
Is this just the way it is? So I should make sure printer scans to jpg or use acrobat for PDF (can acrobat scroll through a directory like Irfan?)
Or is something wrong with my installation/settings so I can continue to use irfanview for pdf files without losing a ton of quality ? (I tried both pdf.dll and ghostscript)
Thanks
I was using irfanview to quickly rotate and/or crop then save as. I found that because Ifranview will scroll through a directory I could get through a lot of documents very quickly.
I have now discovered that all those modified PDF files look terrible because they are now 96dpi instead of the original 200/300dpi (I originally thought they were bad because of wrong printer scan DPI settings).
Even though the PDF save as side box settings says it is lossless, it actually saves to the viewing DPI in the settings. Say a PDF is 300dpi and I want to rotate or crop, then I have to change the dpi settings to the same quality in Irfranview. Quality is good, but file size is now double the original. Plus doing it this way means I first need to check the dpi of the file to be changed then match it in Irfranview, then repeat for every file. This means that there is no point using Irfanview any more because that way is slow and increases file sizes.
I really liked being able to scroll through a directory of many files and crop/rotate the files that need it.
Is this just the way it is? So I should make sure printer scans to jpg or use acrobat for PDF (can acrobat scroll through a directory like Irfan?)
Or is something wrong with my installation/settings so I can continue to use irfanview for pdf files without losing a ton of quality ? (I tried both pdf.dll and ghostscript)
Thanks
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