I'm using a Mac with the Canon and Epson printers.įor me, whether to upsample a file or not depends on the size of the file, what the quality and character of the file is,and often even what kind of camera was used.Ī lot of files I see when large prints are desired, just can't handle upsizing to 300 ppi, or 360 ppi without fringing badly that may require a lot of post retouching if they are even fixable that way. I've found QImage works very well in regard to upsampling and I use it on my HP z printers with a pc.īut with my Canon large format, which is a faster printer I don't use Q Image, I use the Canon plugin for Photoshop which I have found to work very well in regard to output sharpening. March 2017 update, 750+ inkjet media white spectral plots In practice it means that I try going up all the time but when it fails I select the path down but with precaution. That anti-aliased downsampling in QU is also a slow process, actually going for upsampling where possible goes faster. Then going for a lower print quality is often the only choice remaining, I do not rely on the downsampling of the driver then but rely on the anti-aliased downsampling of Qimage Ultimate, not available in all programs. On the other hand with very large prints and always going for upsampling, to 600/720 or beyond, the time on processing and printing becomes very long and/or the process may go belly up in that process. In general if the paper/printer combination can yield a better print quality with that 600/720 PPI or higher input request then use it. Depends on the subject but fabrics can already cause that on glossy papers. Well you may see a nice moiré appearing in your prints if you rely on the downsampling of the printer driver loading a 500 PPI image at 1:1 print scale and having print quality setting ask for a 300 PPI input.
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