Adobe Photoshop CS4 Manual de usuario descargar pdf (Pagina 404)

397

USING PHOTOSHOP CS4

Filters

Last updated 1/10/2010

transitions (Edge Only and Overlay Edge). Where significant contrast occurs, Edge Only applies black-and-white

edges, and Overlay Edge applies white.

Surface Blur Blurs an image while preserving edges. This filter is useful for creating special effects and for removing

noise or graininess. The Radius option specifies the size of the area sampled for the blur. The Threshold option controls

how much the tonal values of neighboring pixels must diverge from the center pixel value before being part of the blur.

Pixels with tonal value differences less than the Threshold value are excluded from the blur.

Brush Stroke filters

Like the Artistic filters, the Brush Stroke filters give a painterly or fine-arts look using different brush and ink stroke

effects. Some of the filters add grain, paint, noise, edge detail, or texture. All the Brush Stroke filters can be applied

through the Filter Gallery.

Accented Edges Accentuates the edges of an image. When the edge brightness control is set to a high value, the accents

resemble white chalk; when set to a low value, the accents resemble black ink.

Angled Strokes Repaints an image using diagonal strokes, with lighter and darker areas painted in strokes going in

opposite directions.

Crosshatch Preserves the details and features of the original image while adding texture and roughening the edges of

the colored areas with simulated pencil hatching. The Strength option (with values from 1 to 3) determines the number

of hatching passes.

Dark Strokes Paints dark areas with short, tight, dark strokes, and lighter areas with long, white strokes.

Ink Outlines Redraws an image with fine narrow lines over the original details, in pen-and-ink style.

Spatter Replicates the effect of a spatter airbrush. Increasing the options simplifies the overall effect.

Sprayed Strokes Repaints an image, using its dominant colors, with angled, sprayed strokes of color.

Sumi-e Paints an image in Japanese style, as if with a fully saturated brush applied to rice paper. Sumi-e creates soft,

blurred edges with rich, inky blacks.

Distort filters

The Distort filters geometrically distort an image, creating 3D or other reshaping effects. Note that these filters can be

very memory-intensive. The Diffuse Glow, Glass, and Ocean Ripple filters can be applied through the Filter Gallery.

Diffuse Glow Renders an image as though it were viewed through a soft diffusion filter. The filter adds see-through

white noise, with the glow fading from the center of a selection.

Displace Uses an image, called a displacement map, to determine how to distort a selection. For example, using a

parabola-shaped displacement map, you can create an image that appears to be printed on a cloth held up by its

corners.

Glass Makes an image appear as if it were being viewed through different types of glass. You can choose a glass effect

or create your own glass surface as a Photoshop file and apply it. You can adjust scaling, distortion, and smoothness

settings. When using surface controls with a file, follow the instructions for the Displace filter.

Lens Correction The Lens Correction filter fixes common lens flaws such as barrel and pincushion distortion,

vignetting, and chromatic aberration.

Ocean Ripple Adds randomly spaced ripples to the surface of the image so that it appears to be underwater.

Pinch Squeezes a selection. A positive value up to 100% shifts a selection toward its center; a negative value up to –

100% shifts a selection outward.

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