![]() ![]() So you will inevitably need quite high dpi / large file sizes like this to keep it looking good. ![]() text or vector figures) will never be as sharp once converted to a bitmap format. What kind of content do the PDFs that you wish to convert contain? Any vector content (e.g. Note: A graphical front-end using nconvert is XnConvert. Converting to 600 DPI with PDF24 gave a 1.8 GB uncompressed tiff, and then finally a 95 MB compressed tiff by applying LZW compression with IrfanView. I have to convert DPI of more than 5k Tiff images on a monthly basis from 200×200 to 100×100. Xnconvert dpi pdf#As an example I started with a ~ 6 MB PDF research paper with text and figures. Use IrfanView just to compress the outputs from that to compressed tiffīoth can be done as batch runs. Use PDF24 to convert the PDFs to uncompressed tiff (output is sharper than IrfanView and is improved as you would expect by increasing the DPI)Ģ. I've managed to get much better results now by combining the two suggestions I gave above in a two step process:ġ. XnConvert also changes image dimensions, size, color depth, DPI. For actual conversions, the application can perform a huge multitude of editing tasks like applying filters, adjusting lighting, brightness, contrast, gamma, etc. I've just had a closer look at this, and I agree, the conversions from pdf in IrfanView do look a bit soft. XnConvert includes a number of useful details about photos including the type, size, modified date and EXIF meta data. Some other tools that might work as alternatives but I haven't tried myself include: Note that depending on the contents of you PDFs, PNG could be significantly more space efficient compared to even compressed TIFF if you don't care about creating multi-page files. It has an option to create multipage TIFFs, as well as bit depth and DPI, but doesn't seem to include TIFF compression options (though you could always add that as a second step with IrfanView if there are any other options here not available in that). Xnconvert dpi full#Select "Custom" output quality for full set of export options. ![]() It effectively works with batches in that you can open multiple files at once, and then you have the option to save them all in one operation. I have used this in the past for converting PDFs to PNG and it works well. Apparently there is a workaround to add dithering too:Ģ. Includes some different TIFF compression options, as well as bit depth and DPI in advanced settings. To create multipage TIFFs you need to tick advanced options and select the option near the end of that menu for "Apply changes to all pages (TIF/PDF saving)". The batch conversion option in IrfanView (shortcut "B"). Two options come to mind that I would use:ġ. ![]()
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