Part 2: Image Size, Resolution, and Cropping - Photography with Imre - Episode 28
Let's get right into this, shall we? We'll start off with a quick discussion about where the resolution value comes from for those who aren't sure, then a segment on what you should keep in mind when shooting photos for print, ending off with suggestions in regard to what resolution could be used for particular print sizes. Resolution Value So how does Photoshop (and most other image editing software) come up with the resolution value for your image? It's actually quite simple; divide the pixel width by the document's width (or use the height values, the result is the same). So if your photo is 4032 pixels wide and the document width is set to 12.841, then you get: 4032 / 12.841 = 313.99423720894011369831010045947 to be exact, but you can't realistically have .994... of a pixel, thus the program rounds to 314 (these values are what you see in the episode ). By the way, pixels per inch and dots per inch are generally used interchangeably but there is a differe...