Quote:
Originally Posted by Garawa
My scanner can scan up to 16000 odd dpi.
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dpi = dots per inch - a term often used incorrectly by scanner manufacturers (as well as many others, including photographers) as this term
only applies to printers.
ppi = pixels per inch and refers to
resolution. Say for example your camera is capable of producing images at a resolution of 5184 x 3456 pixels. If at the printing stage you decided to print at a resolution of 240 ppi (pixels per inch) then you can see that by dividing both these figures by 240 you would be producing a print of 21.6 inches x 14.4 inches (using exact figurers). Increasing the resolution to 300 ppi and repeating the division exercise would give you a print size of 17.28 inches x 11.52 inches - agin exact figures.
In short then, your scanner is capable of scanning up to a
maximum resolution of 16000 ppi (pixels per inch)
not dpi (dots per inch) but here the manufacturers are to blame for using incorrect terminology probably part historical prior to the invention of digital imaging and partly an us - them thing. Who knows.
Not directly related to your initial question I know, but from the above you can see why people generally post low resolution images to the web......72ppi, because at this resolution attempting to steal and print out an image at a reasonable resolution of 240ppi would give you a print size of..........well nothing.