gimp uses 85% quality as a default one for a jpeg image, it might be
that your camera is using a 100% quality by default, try changing this
setting (use the Save As option). the DPI is just a way of telling
other application how big (in dimensions, not the filesize) the image
really should be (after printing for example)

On 7/19/07, Jeffery Small <[EMAIL PROTECTED]> wrote:
> I am using the 2.3.18 development version of gimp on a SPARC Solaris
> system, but I also see this with the 2.2.15 version as well.
> I have a 4MB jpeg file created with my Minolta 7D camera.  I load it into
> Gimp and then immediately save it.  The resulting file is now only 482kB
> in size!  When I use exiftool to examine the exif data, I see the following
> unexpected changes:
>                                Original Version        Saved Version
>                                ---------------------   ---------------------
>    File Size:                  4 MB                    482kB
>    X Resolution:               72                      300
>    Y Resolution:               72                      300
>    Minolta Image Size:         Large                   Medium
>    Focus Mode:                 Manual                  Single-Shot AF
>    ISO Setting:                Auto                    800
>    Free Mem. Card Images:      300                     1
>    Rotation:                   Horizontal (normal)     Unknown (0)
>    Image Number:               3                       4
>    Image Number 2:             5523                    3
> The saved version also reports:
>    Warning : [minor] Possibly incorrect maker notes offsets (fix by -94?)
> It appears that the development version of gimp is messing up the exif header
> in a number of ways.  But why is the file being truncated to such a degree?
> Is there something I have set incorrectly that is causing this?  Is there
> a preference setting for a default level of jpeg compression?  In both
> cases the image size is being reported as 3008x2000 but note the difference
> in the DPI resolution.  I feel as though I must be missing something
> obvious.  Thanks for any pointers you can offer.
> Regards,
> --
> Jeffery Small
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