DPI = 3,600px / 12"DPI = 300. Now I know that if I wanted to use these 3,600 x 3,600 pixel textures in my print work, I could safely print them out up to 12" x 12" in size without seeing a loss in quality. If I printed them out at 6" x 6", I would get an even more detailed image at 600DPI.

For the purpose of android development: dp = dip dpi = ppi inch x dpi = pixels dp = 160 x inch dp = 160*pixels/dpi. So, on a 160dpi phone (mdpi): 2 inches = 320 dp 2 inches = 320 pixels. On a 180 dpi phone: 2 inches = 320 dp 2 inches = 360 pixels. Note that 2 inches is ALWAYS 320dp, independent of screen size.
To do that, scan and print just have to be the same dpi number, but 300 dpi will be a great number for a high quality print. Photos are preferably done on a photo quality printer and photo paper. File size is shown at The Four Sizes of a Digital Image below Printing photos at 250 or 300 dpi is considered very desirable and optimum.
So for a 300 dpi scanner, we should scan only at 300 or 150 or 100 or 75 or 60 or 50 dpi instead of "odd" fractional values like 80 or 120 dpi. A 600 dpi scanner offers more choices: 600, 300, 200, 150, 120, 100, 75, 60, 50 or 40 dpi.

A slight movement will make it fly into the sides of the screens. Now I do know of ONE reason to have a high DPI. In Battlefield 2142 there where these escape pods you could use on a vehicle or the titan itself. With high enough DPI you could change it's direction. That's the only reason I can ever see using high DPI.

For the best print quality there’s a desired correlation of an image’s pixels per inch (PPI) and the lines per inch (LPI). The PPI should always be more densely packed than the LPI of the halftone screen that is used. That brings us to the 2X rule. Our image resolution should be 2x the LPI. 2 X LPI = PPI. Some people may be satisfied with 100 dpi (about NEWSPAPER photoquality) 8x10 = 100x8 x 100x10 = 800x1000 = .8 meg/pixels. MOST people would be "satisfied" with 200 dpi 8x10 = 200x8 x 200x10 = 1600x2000 = 3.2 meg/pixels. The "ultimate" desirable (excellent photo) = 300 dpi 8x10 = 300x8 x 300x10 = 2400x3000 = 7.2 meg/pixels. Peter_pd
DPI stands for Dots Per Inch which means how many dots of printing you get per of inch. It is also known as resolution. A higher DPI printer will also be a higher resolution printer. In other words a 300 DPI printer has a higher resolution than a 200 DPI printer.
KcNEZH.
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    • 200 dpi vs 300 dpi