Resolution of EMF images

[Vic]

Hello,

I am trying to figure out an issue I have with the resolution of EMF images
generated with Save As EMF option. I noticed that when different users save
the same PowerPoint slide in EMF format the resulting files has different
resolutions. For instance User #1 would have ~300 DPI and User #2 would have
~4000 DPI. Additionally I noticed that recreating user profile would reset
the EMF resolution to ~300 DPI.
Does anyone know where these settings are set and if I can change them?

Thank You

 

[Echo S]

EMF is vector format. Does it even *have* a "resolution"?

 

[Steve Rindsberg]

EMF is a vector format (although it can contain raster images). In short, it
has no DPI as such.

It may be that the program you're using to determine the DPI is giving you
misleading information. How are you finding the (alleged) DPI of the EMF
files?


--
PowerPoint FAQ
http://www.pptfaq.com/
==
PPTools - Add-ins for PowerPoint
http://www.pptools.com/

 

[Vic]

Generate EMF file just by saving a PPT slide as EMF. Go to the properties of
the file click summary tab and go to advanced mode.

 

[Vic]

Digging through the local user registry I found following that the EMF
resolution is set by default printer. Basically one user had default printer
with 'Graphics print quality' set to 300 dpi the other one 4000 dpi. I did
verify that this indeed the case by setting print quality to different values
and producing different EMF file.

I still do not understand why this is so!!!

I thought that EMFs should be device independent.

Am I wrong thinking that?

Thank You

 

[Vic]

I am afraid I was not very clear on the registry part. The only thing I
found in registry was that this problem is somehow related to the setting of
the default printer.
It is the settings of the default printer that apparently tells Power Point
what resolution should be used to generate EMFs.

In any case setting the default printer in registry:
[HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows]
under 'Device' key

I should also point out that the default printer was a PDF PstScript
printer. The settings that affects resolution of EMFs is:
Printer Properties->General->Printing Preferences->Advanced->Graphics Print
Quality. Although I believe that this setting could be changed on other
printers as well.

Thank You

 

[Vic]

Yes there actually is a difference in data and the slight difference in the
file size.

 

[Vic]

Files with 4000 DPI are 712kb and 300 DPI 718kb.

This creates a lot inconvenience for us as we process these EMF files
programmatically converting them to bitmaps. So the scaling does not work
the same and I think that converting large DPI files generates enormous
bitmaps that just very costly to process.