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If an image is 72 ppi can it still be printed at 300 dpi? Or will it look bad?
If an image is 72 ppi can it still be printed at 300 dpi? Or is the 72 ppi image considered 72 dpi? If my portfolio is all 72ppi and I need 300 dpi do I need to reshoot everything?
You can resize the image to fool it into thinking it's 300dpi, but that means that it wont be as big as it currently is. Next time shoot and leave the pictures in a Raw. format.
PPI and DPI are two different things that do not translate directly back and forth. PPI is pixels-per-inch and refers to digital information density. DPI is dots-per-inch and refers to the ink output when an ink jet printer prints something.
72ppi images can be printed at 300dpi, but they won't look like professional-quality print photographs. They will either come out as large, grainy images or very tiny crisp images.
You want very high PPI images that are also printed at a high DPI if you are trying to make ink jet prints look like photographic prints.
You can resize an image through resampling. Some computer programs, like Powerpoint do this automatically, without you even noticing. When an image is resampled, the computer uses interpolation to create a brand new set of pixels with smoother edge transitions and smoother transitions through color and density gradients. You can actually get pretty nice results from some resampled images. The computer might not be able to reproduce blades of grass that were not captured in the original image, but it can reproduce the smooth curve of a hillside, or the round shape of the eye's iris.
In Photoshop, click image:resize:image size: and make sure that you have checked bicubic resampling and maintain proportions. The results can actually be very good. It is better not to make a single gigantic leap throught resampling, from 640x480 to 6400x4800, for example. Increase in steps equivalent to about 40% increase at a time until you get to the final image size you would like.
Try to use this picture resizing tool
It works well!
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