which is the dpi of this posters?

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eduguitar83

Number of posts: 0
Written on: 2012-12-11 23:11:50
Hi there, i m new in the site i already looked in the faq site and it doesn't say which is the resolution of this posters...
can somebody tell me if its 300 dpi or less?
thanks in advance,

Drarakel

Number of posts: 133
Written on: 2012-12-13 16:08:51
a) The term "resolution" alone can be ambiguous. Some people use this word for the pixel size (width x height), some people use it for the dpi value (dots or pixels per inch; or per centimeter).
b) The important figures - the pixel sizes - can be read at every poster page. Most people won't need a dpi value.

An automatic display of the dpi value (from the JPEG metadata) wouldn't be very useful anyway - there is often none or only a false (outdated) one.
If one really wants to know the dpi value and one has a certain real-life size in mind or takes the real-life size from the additional upload details (some uploaders do specify the original format like One Sheet or DIN A1 etc.), then one can quickly do the math: divide one pixel size by the size in inches (or centimeters with an additional factor). For example: An A1 poster (59.4x84.1 cm), stored in.. let's say 2119x3000px has a (vertical) dpi value of (3000/84.1)x2.54 = 91 (dpi). Now, the same digital image for an e.g. A5 size (14.8x21.0 cm) has (3000/21)x2.54 = 363 dpi. And so on.

eduguitar83

Number of posts: 0
Written on: 2012-12-14 02:50:09
thanks for reply , yep you are right about that it can be ambiguous, i was referring about the dots x pixels per inch.
it was useful your explanation

Martijn

Number of posts: 438
Written on: 2012-12-14 12:07:38
Hi,

check out this article about The Myth of DPI.

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