Inside Photoshop® CS

Bitmap and Vector Graphics

Okay, we've tossed the word resolution into the discussion of pixels twice so far, and it's time now to provide an explanation of the term…

In Photoshop, the term resolution refers to the number of pixels-per-inch used to portray an image; a high-resolution image contains a lot of pixels, whereas a low-resolution image carries relatively few. Typically, the more pixels in an image, the finer the level of detail the image conveys.

Bitmap Graphics

Raster graphics are commonly called bitmap graphics, and so shall we, because a graphic of this type is literally a map of bits of information. The identifying characteristics of a bitmap are photographic quality, occasional visible jaggy edges due to insufficient viewing resolution, ...