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#21 | |
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Join Date: Jan 2004
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nelmr wrote:
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You probably could tell the difference - but if the original is sharp, detailed and crystal clear, we can easily print it out with marvelous results. Dave |
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#22 | |
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Join Date: Oct 2003
Location: Indian Rocks Beach, FL
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I'm a little surprised you saw no improvement over bicubic with SI. I occasionally prefer a Genuine Fractals upsample to SI, but I always prefer one or the other over bicubic. SI has a couple strikes against it from the gitgo because it is so non-intuitive. If any resample slightly deteriorates an image then a series of upsamples should look really crappy. Something nobody has mentioned is sharpening. There are much more sophisticated sharpening methods than unsharp mask, and it is worthwhile learning a little about sharpening if one is going to press resolution limits in a large prints. Another is noise reduction. Often images that need no noise reduction in a smaller print will need it for a large one. But noise reduction always softens the image slightly. Often just part of the image needs noise treatment and I select out those areas and sharpen only the parts that need it. It isn't that hard with a stand alone program but it is easier with a plug-in. |
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#23 |
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!!
Last edited by bernabeu; Jun 27, 2015 at 4:24 PM. |
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#24 |
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Join Date: May 2005
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When blowing one up what is the prefered sharpening method? High Pass?
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#25 | |
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RP33 wrote:
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This is as good an overview of sharpening as I've seen. Dr Mitchell occasionally posts on the board as gmitchel and always announces his new tools on the plug-in forum. He has two sharpening toolkits and I find the action set easier to use than the script version. You really have to read the PDF that comes with either. http://www.thelightsrightstudio.com/...ningSkills.pdf And the companion to his sharpening toolkit: http://www.thelightsrightstudio.com/...ng-toolkit.htm I find the little freeware SharpControl to be the best simple sharpener I have found. For a couple of years I had to e-mail it to people and I'm glad it is back online. It was part of a medical program someone with the handle of Vtie wrote. Unfortunately he stopped posting on dpreview because he was tired of all the Canon versus Nikon DSLR bickering. There is a larger program called PhotoControl that includes SharpControl, but I have only SharpControl on my computer. You might like PhotoControl but I found I could do as well in Photoshop and didn't have to export the image. SharpControl is a nuisance because you have to export the image as a tiff and re-import back to your image editor after sharpening. I haven't had much luck with the copy/paste it is supposed to support. I find it worth the effort if I want a quick and good sharpening. I have the NK Sharpener Pro plug-in for Photoshop and think SharpControl does a better job. Maybe I'm just not good enough with the NIK Sharpener. You can get the download link for SharpControl and PhotoControl here: http://www.valsphotography.co.uk/inf..._Software.html |
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#26 | |
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bernabeu wrote:
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Is there a link for this so I can preen my feathers? ( ![]() Dave |
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#27 |
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Join Date: May 2005
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now I have a chart to use to help me. Thank You it will help me and others a lot.
Now if I have a small image and I am upsizing it to meet the numbers on the chart, How do I know that I am pushing the image too much without printing it? What will I see or is there something to look for. Obviously I cant to a 640x480 picture and upsize it big enough to make a 20x30 picture. What do I watch for? |
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#28 | |
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RP33 wrote:
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Dave |
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