Pixel count & film grain
Mar 20, 2014 08:44:42 #
Do pixel counts equate to film speeds/ grain, i/e higher pixel count better definition in enlargments?
Mar 21, 2014 05:50:44 #
Yes, pixel count is one of the most important things determining how far you can enlarge an image, depending on WHAT you are using it for. For an image that will be on the web, 72 ppi (pixels per inch) is usually sufficient. If you are having your image printed, then 300 ppi (becomes dpi - dots per inch in print) is the standard used by most magazines for pre-press printing. So the more pixels you start with, the larger you can go. Once you exceed your pixel count any further enlargement will usually create noise in the image, or cause the computer making the enlargement to make decisions on how to fill in the blank space. (this is how 'digital' zoom works, as opposed to optical zoom)
As a general rule, film speed (ISO) will produce more grain (noise in digital) as the number gets higher. Some digital cameras handle that better than others.
Hope this helps
Bill
As a general rule, film speed (ISO) will produce more grain (noise in digital) as the number gets higher. Some digital cameras handle that better than others.
Hope this helps
Bill
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.