BobHartung Loc: Bettendorf, IA

My question is why you would be saving your images at 72 dpi? Are you short of storage of is it that you never plan on doing anything with them?

TheDman Loc: USA

The dpi value doesn't affect file size or the ability to "do anything with them". It affects nothing.

pentaxion Loc: Daytona Beach

A 100 pixel wide pic printed at 10 inches on a 300 dpi printer will be 300 dpi. Printed at 1 inch it will be 300 dpi. In the first case each pixel will be 30 dots wide and in the second case 3.

BobHartung Loc: Bettendorf, IA

Depending on the overall size (wxh dimensions) of the image. I have just never heard of archiving images at 72 dpi. I presume these are in jpg format; if kept in RAW then there is no issue.

Changing the pixel density is a matter of resizing, however if they are stored at 72 dpi or ppi and are sized at 5x7" then you will have to interpolate pixels to increase pixel density.

TheDman Loc: USA

Yep, you can stop right there. That is ALL it depends on; the total number of pixels. People unnecessarily continue to state pixel dimensions in terms of inches in an attempt to give that dpi value some sort of relevance, which just serves to confuse them and everyone else. When someone asks me how tall I am, I don't say I'm 3 hours tall at 2.1 feet/hour. I say I'm 6'3". So why say an image is 5"x7" at 300 dpi? Why not just say it's 2100x1500?

rehess Loc: South Bend, Indiana, USA

No, No, No.

If kept in JPEG there is no issue.
If kept in raw, there is no issue.
Changing dpi by itself changes only a number in the file.
If you change size of picture in inches, but keep dpi the same, only then do you have to interpolate, because that would require that you change number of pixels, which is determinant of file size.

PHRubin Loc: Nashville TN USA

What has that to do with the 72 number in the EXIF data?

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Your image has to have a resolution of 1500x2100 pixels, or 3.15 mp. if the image is going to be printed at 5x7 (300x5) X 300x7). You can do this by cropping or resampling the image during exporting. But I am no longer familiar with Corel, so I can't tell you how to do that.

If you have an image that is 3000x4200 pixels, and you want your images to be 300 dpi (dpi and ppi are often interchanged in common usage) you can downsample (resize the image, in pixels, to a smaller number), by specifying a smaller size when you save the image as a jpeg.

Your images are not being saved at any specific resolution, other than the number of pixels in the original capture or fewer if you crop the image. the 72 dpi is a metadata tag, that is meaningless. If you save the image at 6000 dpi WITHOUT RESAMPLING, you will see that nothing has changed, the image is the same size, will display to the same size, and the file itself will be no different in kilobytes or megabytes. Resampling to a smaller size will reduce the image dimensions, in pixels, on the width and the height.

via the lens Loc: Northern California, near Yosemite NP

You can find the Corel PaintShop Pro user Guide under the Help menu as in most programs, this should should assist you in learning how to export at any size you want: try the Sharing section of the User Guide. When I read over the information quickly it looked much more complex than what I do in Lightroom. Here is something from the User Guide about saving photos (below). Just provide the printer with what he/she is asking for as they know what they want for this particular use and after that you can get into detailed discussions about 72ppi and 300 ppi or whatever other ppi people want to save or export at. The sharing of photos seemed fairly complex in this program and I could not find anything on just exporting them out, but you'll have to read much more carefully than me. The User Guide is over 800 pages long! Are you using this program to actually paint the photos somewho, thus changing the way they look? I'd be interested in seeing one if that is the case. I've downloaded the trial version to see if I want to use it, but I can say that Lightroom sure seems a lot easier. Good luck.

rmalarz Loc: Tempe, Arizona

A bit more specificity here might help in providing you an answer. Where does it appear in which exif data?
--Bob

BobHartung Loc: Bettendorf, IA

Which is what I tried to say. If you save at 72 dpi or ppi and have it sized at 5x7" you are dealing with a 360 x 514 pixel image. To enlarge this you have to manufacture information and that is unlikely to look as good as originally captured image data.

rehess Loc: South Bend, Indiana, USA

I've never known anyone to save by physical size; I'm more familiar with saving by pixel size.

PHRubin Loc: Nashville TN USA

Technically, in Windows, right click -> Properties -> details. See below"

rmalarz Loc: Tempe, Arizona

Paul, thanks for the clarification. That is the resolution of the .jpg image file on which you right clicked.

Similarly, I found an image of mine on one of my Windoze systems. Note the resolution.
--Bob

Wes Loc: Dallas

All these guys are more experienced than I am but in photoshop if you save a picture at 72 ppi then enlarge it to 300, it becomes pixilated. Enlarge one of your pictures and see what it looks like. Also, saving at 200 ppi is adequate to prevent that. On your computer screen 72 ppi is the resolution you will see.