I found Perfect Resize to be VERY slow in comparison with no benefit I could see on the print compared to using tools I already own. That produced the biggest differences in the tests I did. I did not see a compelling difference doing this or upsizing in Photoshop or using Step Interpolation there but there were tiny differences (and improvements) upsizing from the raw data and very important, with proper capture sharpening. You can set a higher than native resolution. Just before rendering (using the Export dialog). In that case, also because you do not need to store a huge intermediate file, it may be more efficient to let Qimage do its on-the-fly magic based on the original output. However, it does not add resolution, it just optimizes the use of what the original image data has to offer.Īt a modest doubling of the linear pixel resolution, there will not be too much difference in output regardless of which of these applications you use. It uses very good interpolation algorithms to match the required upsampling for the specific output device one wishes to use, and can automatically add smart output sharpening after the automatic upsampling to match the output device/medium/size. Qimage has a different purpose, it's intended for creating great (printed) output at just about any size you need without having to specify and specifics other than output size. The benefit is that it can actually add some detail to sharp edges beyond which is available in the source image. Perfect Resize can produce a great upsampled result, but you do need to use the proper settings for the particular image you are upsampling. You said no Lightroom, I get it, but just to explain where I'm coming from. I use Lightroom 6 for almost all photo printing, and IMO it does an excellent job of automatically rescaling as needed. I do not know whether it was ever thought to be comparably good for downscaling, or whether its technology has kept up, or whether On1 Resize 2018 in fact contains the core of Genuine Fractals (although apparently it does).Īnother software option that has been recommended on DPR and that has impressive examples on its website is PhotoZoom ( I cannot comment on the relative rescaling performance of Affinity Photo (which I do have), Faststone, or Raw Therapee. What I do not know is whether / how well Qimage chooses among the several resizing algorithms it can perform if you let it choose itself / accept the default settings, versus to what extent Qimage benefits from a knowledgeable user choosing the most appropriate one for the specific image and output size.īy many accounts, back in the day Genuine Fractals was at least among the best if not the best software methods to upscale images for printing. In any given case, that might be Lanczos or bicubic or something else.īy all accounts Qimage can do an excellent job resizing for printing. The best way to upscale or downscale an image for printing at a given size will depend on the image, whether you are upscaling or downscaling, and your taste / preferences. Should I use the On1 2018 resize module (genuine fractals), or something like lanczos or bicubic in affinity photo, faststone, raw therapee, etc., or just let Qimage One handle it? By most accounts, a well-chosen resizing algorithm will do visibly better than the simplistic techniques that most printer drivers use. Unless your image is exactly 300 ppi (or maybe 600 ppi if you're using a super-high-resolution mode), then you ought to resize it to exactly 300 ppi (or 600) before sending it to the printer. If my image is not between 300 or 600 ppi for the desired print size I want
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