DPI

Dots in a printing see over 300 dots per inch make the image look sharper,
more dots, more large the printing (in memory - file size)
larger the image the longer photoshop takes to edit it
RAM- 2-4G,
we shall be using 150 DPI, Digital print
normal screen 72 DPI ,
Main one we use is RGB,
CMYK prints in four colour,- industrial printers
don't want pixelated image, example black circle black then grey then white
Vector image- looks the same differences is this is one isn't done with pixels just a smooth circle
even from the first ever console was made by vector graphics image
pixel is now main stream, but now every one is going back vector graphics,

DPI- Dots Per Image