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Jaggies
A slang term, maybe, but 'jaggies' refers to jagged diagonal lines that appear in a low resolution image. Pixels are square, so if large pixels are being used to represent a diagonal, you'll be able to see the corners of each, creating a saw-like edge. Anti-aliasing is used to soften jaggies, whereby the software will attempt to calculate 'in-between' shades to blur the line a little and make it look smoother. read more…
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JPEG
This file type stands for Joint Photographic Expert Group, and is the most commonly used system of image compression. Using a sliding scale between file size and picture quality, it enables digital cameras and computers to squash a large picture file into a small amount of memory. Be careful when compressing files, though, because too much compression will reduce the quality of your image. read more…
