Bedienungsanleitung Adobe Photoshop 7 (Seite 457 von 549) (Englisch)

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Using Help | Contents | Index Back 457

Adobe Photoshop Help Saving and Exporting Images

Using Help | Contents | Index Back 457

Generic PDF ﬁles Are created using applications other than Photoshop, such as Adobe

Acrobat and Adobe Illustrator, and can contain multiple pages and images. When you

open a Generic PDF ﬁle, Photoshop rasterizes the image.

PICT File

PICT format is widely used among Mac OS graphics and page-layout applications as an

intermediary ﬁle format for transferring images between applications. PICT format

supports RGB images with a single alpha channel, and indexed-color, grayscale, and

Bitmap-mode images without alpha channels. PICT format is especially effective at

compressing images with large areas of solid color. This compression can be dramatic for

alpha channels with their large areas of white and black.

When saving an RGB image in PICT format, you can choose either a 16-bit or 32-bit pixel

resolution. For a grayscale image, you can choose from 2, 4, or 8 bits per pixel. In Mac OS

with QuickTime installed, four JPEG compression options are available.

Note: In ImageReady, PICT format is supported in Mac OS only.

PICT Resource

(Mac OS) A PICT resource is a PICT ﬁle contained in a Mac OS ﬁle’s resource fork—for

example, an application’s splash screen or the contents of the Scrapbook. PICT Resource

format supports RGB images with a single alpha channel, and indexed-color, grayscale,

and Bitmap-mode images without alpha channels.

You can use the Import command or the Open command to open a PICT resource. When

saving a ﬁle as a PICT resource, you can specify the resource ID and resource name. As with

other PICT ﬁles, you also specify bit depth and compression options.

Pixar

The Pixar format is designed speciﬁcally for high-end graphics applications, such as those

used for rendering three-dimensional images and animation. Pixar format supports RGB

and grayscale images with a single alpha channel.

PNG

Developed as a patent-free alternative to GIF, Portable Network Graphics (PNG) format is

used for lossless compression and for display of images on the World Wide Web. Unlike GIF,

PNG supports 24-bit images and produces background transparency without jagged

edges; however, some Web browsers do not support PNG images. PNG format supports

RGB, indexed-color, grayscale, and Bitmap-mode images without alpha channels. PNG

preserves transparency in grayscale and RGB images.

QuickTime Movie (ImageReady)

QuickTime Movie format is a cross-platform format used for time-based data, such as

video and audio. In ImageReady, you can save animations as QuickTime movies and open

existing QuickTime movies as animations in order to optimize them for the Web.

Note: In Windows, QuickTime Movie format is visible in the Files of Type pop-up menu only

when QuickTime is installed on your computer.

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Adobe Photoshop 7 Seite 457

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