Re: converting image to 600 or 1200 DPI

Posted by Kenton Arkill on Sep 15, 2014; 2:16pm
URL: http://imagej.273.s1.nabble.com/converting-image-to-600-or-1200-DPI-tp5009617p5009621.html

Hi
Michael is right about the flame war possibilities, and the other Michael
is also right.

So with Image>adjust>size make it the size you want

so if  you want it printed at 1200DPI in a 4inch wide figure

1600*4 = 6400 in the width (with aspect ratio locked).

Regards
Kenton







On 15 September 2014 15:04, Michael Schmid <[hidden email]> wrote:

> 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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>

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