06-12-2016 12:27 PM - edited 06-12-2016 12:29 PM
What post processing software are you using? You can set a "DPI" value in an image file's metadata. See Resolution below.
06-12-2016 12:32 PM
I use Gimp and/or zoner
I am not familiar with either one of those. Perhaps someone who is can help. I posted an image of a screenshot from the freeware application PaintDOTNet.
06-12-2016 12:58 PM
So then when a gallery asks for images of my paintings at 300dpi what do I do.
Unless you are using a flatbed scanner large enough to scan the painting at 300 dpi, don't worry about it.
If you are giving them a photo of the work you are limited by the megapixels of the camera. And then the DPI doesn't matter.
06-12-2016 06:47 PM
06-12-2016 09:14 PM - edited 06-12-2016 09:17 PM
06-13-2016 08:47 AM - edited 06-13-2016 08:48 AM
DPI stands for Dots Per Inch. DPI is often misused. If someone says they want a photo that is 300 dpi what they really mean is they want 300 PPI.
A digital photo has no PPI (or DPI). PPI only happens when the photo is printed.
The resolution of a digital photo is in pixels or commonly MP. To further complicate this most modern software like PS and LR and Gimp use 300 DPI to refer as a high resolution photo. They all have a menu where this can be set. It is found in the Printer Settings.
06-13-2016 09:55 AM
Do the calculation. If the image is 10 x 12, then the image needs to be 3000 x 3600 pixels (the number of inches x the dpi).
If you have really large canvases you might have to take multiple pictures and mrege them for 300 dpi.