Information about raster images In raster images, a rectangular grid of image elements (pixels) is used to represent them. Each pixel corresponds to a specific location and color value.
When working with raster images, pixels are edited, not objects or shapes. Raster images are the most common way to transfer such unwritten images, such as photographs or digital drawings, because it allows the most efficient transfer of subtle gradations of color and tones.
Raster images depend on resolution, that is, they contain a fixed number of pixels.
With a strong increase on the screen or when printing with a resolution lower than the original, details are lost, and the edges become uneven.
Sample bitmap images with varying degrees of magnification Sometimes bitmap storage requires a lot of disk space, so these images often require compression to reduce the size of files when used in some components of Creative Suite.
For example, before importing an image into a layout, it is compressed in the application where it was created.
Note. In Adobe Illustrator, you can create graphic raster effects for drawings using effects and graphic styles.
Additional Help topics “About vector images” on the page About vector images Vector images (sometimes called vector shapes or vector objects) consist of lines and curves defined by vectors — mathematical objects that describe the image according to its geometric characteristics.
Vector images can be freely moved and modified without loss of detail and clarity, since such images do not depend on resolution.
Their edges remain clear when resizing, printing on a PostScript printer, saving to PDF-file, as well as when importing into an application for working with vector graphics.
Thus, vector images are the best choice for illustrations that are displayed on various media and whose size has to be changed frequently, such as logos.
Examples of vector images are objects that are created in Adobe Photoshop Creative Suite with drawing tools and shape tools.
Copies of vector images in various components of the Creative Suite can be created using the Copy and Paste commands.
