How do I calculate the right image resolution?
For your printed matter, DPI (dots per inch, inch = 2,54 cm) is often specified as a quality requirement.
If you want to use DPI as
For what medium will the image be used and in what size?
We will use the following formula:
(21 : 2,54) x 150 DPI = 1240 px
(14,8 : 2,54) x 150 DPI = 874 px
Render the image in resolution 1240 x 874 to meet the 150 DPI requirement.
Under output in ViSoft
Default print DPI resolutions:
Billboard = 15 dpi
Magazine= 150 dpi
Fine art print = 240 DPI
Formula size in cm to pixels
(width in cm : 2,54) x 300 DPI = pixel size
(height in cm : 2,54) x 300 DPI = pixel size
Formula pixel to width or height in cm
(width pixels : 300 DPI) x 2,54 = imagesize in cm
(height pixels : 300 DPI) x 2,54 = imagesize in cm
Note: this formula is only a theoretical resolution and does not always apply. It also depends on the quality of the image.