Resolution on opening files

[StanLaurel]

I am using Paintshop Pro X2 (although the same applies to version X3 which I am currently trialling). My digital cameras (one an 8 year old pentax optio and the other a panasonic FZ50) save pictures in jpeg format. I have the default resolution in Preferences set to 300dpi. However, whenever I open a photo in Paintshop Pro for the first time, it always opens at a resolution of 72dpi. Is there a way of forcing the program always to open files from the camera at 300dpi?

[LeviFiction]

Yes there is a way to set a default resolution, but not for files that already define their own resolution.

Does anything else show a different DPI?

For example, if you right-click on the image and go to properties and under the Details tab you can see the DPI. Does that say 300?

I only ask because I've never had a problem with PSP not getting the DPI correct from my camera. So if the camera isn't recording the DPI properly then that's not PSP's fault. On the other hand if something is going wrong it's good to identify it as soon as possible and report it to Corel. If it's a known problem....then I've never heard of it so I can't say.

Now if you go to your general preferences dialog (File->Preferences->General Program Preferences) and select Units from along the side there. You'll see an area labeled Default Resolution. This number only applies when the file does not specify its own DPI setting. Mine is defaulted to 200dpi.

[Tadjio]

Under File Preferences > Units you can set the Default Resolution for images that do not contain resolution information.
I think the 72 dpi is set in the camera - look under Image Information.

[ronzie]

In your camera settings there should be a a selection of what kind of .jpg quality you want which affects dpi. Typical settings are large, large-fine, etc. This results in the camera storing a certain file size per image based on these settings and the image resolution of the sensor and the compressed image quality you chose.

The increased file size means less images on the camera storage media for each media capacity.

The actual file size will vary based on the detail in the image. As an example, solid areas will compress more than detailed textures.

Your camera manuals should give average resulting file size for each .jpg quality setting.

[StanLaurel]

Thank you very much for these replies. You are quite right that the cameras are both prescribing 72dpi, so its back to the camera manuals to try to sort it out.

[Tadjio]

The answer lies in the Pixels

(nb Dots per Inch (dpi) is really a printing term - you mean ppi

The more Pixels per Inch (ppi) you want, the more Pixels you need.
So if you increase the ppi from 72 to 300 you will need 4 times as many Pixels.

In the camera, you can do this by incresing the image quality / size.
In PSP you can do this using ReSize but you will get a smaller Print
unless you let PSP 'fill' the gaps for the missing Pixels.

This whole topic gets very complicated and confused but if you play with
ReSize in PSP you can get a better idea. Try changing the Resolution (ppi) but
resetting the pixel size to the original figures (ie 100%) - the Print Size will reduce.

[JONE5]

I too have a similar problem. If I save my images @ 400dpi the next time I open them they come in at 96dpi.
I work with TIFFs that have been converted in Digital Photo Professional to TIFF 400dpi from RAW taken on a Canon EOS 500D.
They open first time round at 400dpi, then when I have cropped, resized etc, then save and close, they reopen at 96dpi.
Same dpi info displayed if I right click on file properties in Explorer.
Tech support are looking at this as I've just finished talking to them.
Any one else get this?

Thanks