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2. Re: when you're deciding what size to make each photo, there starts to be a point where there is a notic
Mike Gondek2 May 21, 2013 12:47 PM (in response to excessphotos)A popular rule is twice your printers linescreen is what you for your native resolution for your file (eg: 150lpi = 300 dpi). Softer less detailed areas of images like smoke or clouds can get away with less resoltuion.
I do not wish to spoil any hopes about software that can uprez your images—but have thoroughly tested the 3 most popular products, and they really do not make any significant improvement to the images. Photoshop bicubic interpolation optiosn along with a little hand shrapening can often get you better results, but if your native resoltuon is much lower than your line screen that you reaaly need to start with more pixels.
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3. Re: when you're deciding what size to make each photo, there starts to be a point where there is a notic
JJMack May 21, 2013 1:01 PM (in response to excessphotos)Every Time you resample an image interpolating it up or down in pixel size you loose some image quality. You wind up with a completely new image not a single pixel was created using optics and a sensor to capture the image. All pixels have been generated by computer algorithms to change an existing image's pixels size. It is always best to start with the best pixels you have for an image. The ones your camera gives you. So you should always preserve the image pixels you get from your camera. If you need a different pixel size image always start with the pixels you get from you camera. Do a single interpolation with those pixels and save the resulting image to a different file. If your unsure of the quality of the image pixels. For example some camera setting will over sharpen jpeg images in camera there will be sharpening artifacts. Then you should use a good general purpose interpolation method like "Bicubic". If you know your image have good quality you may want to choose and interpolation method that you know works well on you image when reizsing in a particular direction up or down in pixel size..
If you use Photoshop then Place in your Camera image. The full Pixel size image is embedded into the Smart Object Layer and the layers pixels are also the full pixel size image with an associate transform. The transform resample the full size image using your Photoshop's Preference Interpolations method. It is a good idea to change CS6 Adobe default "Bicubic Automatic' to plane "Bicubic".
Message was edited by: JJMack
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4. Re: when you're deciding what size to make each photo, there starts to be a point where there is a notic
excessphotos May 21, 2013 5:04 PM (in response to JJMack)best followup questions ever -- http://forums.adobe.com/message/5341165
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5. Re: when you're deciding what size to make each photo, there starts to be a point where there is a notic
Noel Carboni May 21, 2013 5:27 PM (in response to excessphotos)I did visual examinations of a highly detailed image of a candy shop once, printed at everything from low to high PPI. The printer was an HP Deskjet laying down ink dots at 1200 x 2400 dpi.
http://forums.adobe.com/message/4268103
Some folks say prints only need to be 300 ppi, but I saw differences in the output up to about 600 ppi, above which I could see no improvements. There was some good discussion in that thread as I recall.
That reminds me, I need to repeat the experiment now I have a better printer.
-Noel



