Re: converting image to 600 or 1200 DPI

Posted by Michael Schmid on Sep 15, 2014; 1:58pm
URL: http://imagej.273.s1.nabble.com/converting-image-to-600-or-1200-DPI-tp5009617p5009619.html

Hi anonymous,

you get the image resolution via Analyze>Set Scale. ImageJ has no default resolution. If no resolution is given in the file, many programs assume a default resolution of 72 dpi, ImageJ assumes that the length unit is simply given as '1 pixel', not in mm, cm or inch.

You can change the resolution in Analyze>Set Scale, but that makes the image larger or smaller (the size in pixels remains the same). To change the image size in pixels, use Image>Adjust>Size.

Note that ImageJ does not read or write the resolution for JPG files, only that of TIFFs.

Michael
________________________________________________________________
On Sep 15, 2014, at 13:24, csadangi wrote:

> Hello everyone,
>
> I would like to know how can i convert an existing image to 600 or 1200 dpi?
> And how to find what is the default image DPI?

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