[magick-users] identify - wrong resolution

[Anthony Thyssen]

On Mon, 29 Jun 2009 16:37:28 -0400
John Culleton <john at wexfordpress.com> wrote:

| On Monday 29 June 2009 12:00:30 am Anthony Thyssen wrote:
| > On Sun, 28 Jun 2009 17:35:57 +0200
| >
| > Noel da Costa <noel at arc2.co.uk> wrote:
| > | Hi,
| > |
| > | Thanks...  what I did was open it into Photoshop, which reports
| > | the resolution as 300dpi.
| > | Perhaps Gimp would do the same?
| >
| > BOTH would be faking it!!!
| > Just as IM does.
| >
| >
| > All of them are raster image processors.
| 
| Therefore in Gimp one can increase or decrease the dpi figure and 
| run the dimensions up or down as you go.  The converse is not true 
| for some reason.  
| 
What do you mean the converse is not true.  Of course it is true.

   convert -density 300 file.ps  info:
   convert -density 600 file.ps  info:

would report that the 600 dpi image is twice the size (four times the
area) as the 300 dpi version!


  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
 -----------------------------------------------------------------------------
  UNIX is the spawn of the devil,
       why he even has his deamons running the thing!    -- Anthony Thyssen
 -----------------------------------------------------------------------------
     Anthony's Home is his Castle     http://www.cit.gu.edu.au/~anthony/