Adobe Illustrator CS3 Manual de usuario descargar pdf (Pagina 358)

ILLUSTRATOR CS3

User Guide

352

All of the commands in the top section of the Filter menu (Colors, Create, Distort, and Stylize) can be applied to

vector objects (with the exception of Object Mosaic), but only some commands in the Create and Colors submenus

can also be applied to bitmap objects. All of the commands in the bottom section of the Filter menu are raster filters

and can be applied to bitmap objects, but not to vector objects or 1-bit (black-and-white) bitmap objects.

About raster effects

Raster effects are effects that generate pixels, rather than vector data. Raster effects include SVG Filters, all of the

effects in the bottom section of the Effect menu, and the Drop Shadow, Inner Glow, Outer Glow, and Feather

commands in the Effect

> Stylize submenu.

Whenever you apply a raster effect, Illustrator uses the document’s raster effects settings to determine the resolution

of the resulting image. These settings have a large impact on the resulting artwork; therefore, it’s important to check

the document raster effects settings before you start working with filters and effects.

You set rasterization options for a document by choosing Effect > Document Raster Effects Settings. (See “Raster-

ization options” on page 352.)

If an effect looks good on-screen, but loses detail or appears jagged when printed, you need to increase the document

raster effects resolution.

Rasterization options

You can set the following options for all raster effects in a document or when you rasterize a vector object.

Color Model Determines the color model that is used during rasterization. You can generate an RGB or CMYK color

image (depending on the color mode of your document), a grayscale image, or a 1-bit image (which may be black

and white or black and transparent, depending on the background option selected).

Resolution Determines the number of pixels per inch (ppi) in the rasterized image. When rasterizing a vector object,

select Use Document Raster Effects Resolution to use global resolution settings.

Background Determines how transparent areas of the vector graphic are converted to pixels. Select White to fill

transparent areas with white pixels, or select Transparent to make the background transparent. If you select Trans-

parent, you create an alpha channel (for all images except 1-bit images). The alpha channel is retained if the artwork

is exported into Photoshop. (This option anti-aliases better than the Create Clipping Mask option.)

Anti-alias Applies anti-aliasing to reduce the appearance of jagged edges in the rasterized image. When setting

rasterization options for a document, deselect this option to maintain the crispness of fine lines and small text.

When rasterizing a vector object, select None to apply no anti-aliasing and maintain the hard edges of line art when

it is rasterized. Select Art Optimized to apply anti-aliasing that is best suited to artwork without type. Select Type

Optimized to apply anti-aliasing that is best suited to type.

Create Clipping Mask Creates a mask that makes the background of the rasterized image appear transparent. You do

not need to create a clipping mask if you selected Transparent for Background.

Add Around Object Adds the specified number of pixels around the rasterized image.

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Adobe Illustrator CS3 Manual de usuario Pagina 358