Adobe illustrator 10 Manuale Utente

You can do the following with bitmap images:

Place an image into a file. (See 

.)

Use the Links palette to see information about the image. (See 

.)

Trace images using the auto trace tool. (See 

Create bitmap artwork with a transparent background using the Rasterize filter. By 

using the Transparent option in the Rasterize filter, you create an alpha channel (as in 
the Adobe Photoshop application). The transparent background also provides superior 
anti-aliasing of the rasterized artwork than does using a clipping mask to mask the 
background.

Create a clipping mask in the Rasterize filter to make the background appear trans-

parent. (See 

.)

Use the Rasterize dialog box to convert vector objects (including paths and text 

objects) into an image, and choose other options for the image. You can also change 
the color model for the image by reselecting Rasterize and changing the color. 
(See 

Colorize 1-bit images. (See 

.)

Use bitmap filters and filter effects. (See 

Use the Object Mosaic filter to convert the pixels to a collection of colored squares. 

Then you can use Illustrator tools. (See 

Apply the Photo Crosshatch filter, which gives a photographic image the appearance of 

a pen drawing. (See 

The process of changing a vector graphic to a bitmap image is called rasterization. During 
rasterization, Illustrator converts the graphic’s paths into pixels. The rasterization options 
you set determine the size and other characteristics of the resulting pixels.

There are two ways to rasterize vector graphics:

The Object > Rasterize command permanently converts the graphic to a bitmap image 

using the specified rasterization settings. Once you apply the Object > Rasterize 
command, you cannot modify the image’s rasterization settings.

The Effect > Rasterize command changes only the appearance of the graphic without 

changing the graphic’s underlying structure. You can modify the rasterization settings 
of the bitmap image or revert the bitmap image to a vector graphic at any time.