Making 300 dpi images from powerpoint slides

Publication quality images are usually high resolution images with 300 dpi density. For those using screen shots, copy pasting images on powerpoint slides and later saving them into JPEG or any other file format, usually get the image saved as a 96 dpi. I use gimp(GNU Image manipulating program) as an image editing software for my papers. Gimp has options to increase the resolution. You can go to file -> open -> <your image>

Once the image file opened,   go to Image and select scaleImage. Change resolution with more pixel density and then say 'scale'. Finally save the image. Now you will notice, the image file is bigger with more pixel density, but it has not made the image any clearer. When you open the file, you may see unwanted black dots here and there, making the image looks more messy. There is a very cool way to this by editing the windows registry. NOTE: before you start doing this, make sure, you have windows service pack-2 installed.


For that open a command line option in windows something like this:




 Then from the left menu, click on HKEY_CURRENT_USER -> Software -> microsoft -> office -> 12.0 -> powerpoint -> options . At this stage there will be some binary values already on the right pane. Then go to Edit -> new -> DWORD (32 bit value) and type in any name such as ExportBitMapResolution. Once created, this will appear on your right hand side binary lists. Then click on the ExportBitMatResolution and then set the value as 300 and select decimal. Then come out of it.

Now whenever you try to save an image from a powerpoint slide, it will by default save it as 300 dpi
as against 96 dpi.