Bedienungsanleitung HP scanjet 7490c (Seite 52 von 132) (Englisch)

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Saving to a file

Save scanned images as files when you want to use the images again

later. For help deciding on which file type to use, see "List of file types"

on page 52, or see "Tips for best image quality" on page 59. For

definitions of File types, see the "Glossary" on page 109.

To save to a file

1 Do one of the following:

● On the Scan menu, click Save As.

● On the toolbar, click .

2 Select a file type. See "List of file types" on page 52.

3 Select a name and location for the file and click OK.

4 If the Options button is available, more options are available for

this file type. Click Options, change any options you want, and

click OK.

The file type you need depends on how you will use the file. And, some

file types are not available when certain output types are selected.

To save a scan for future processing in OCR software

If you plan to process a scanned document with your optical character

recognition (OCR) software, use the following settings:

● Resolution: 300

● Output type: Black & White Bitmap

● Format: TIFF

Note: Selecting higher resolutions than 300 dpi will not

increase OCR accuracy.

List of file types

Image file formats

● GIF. GIF is a compressed file format suitable for an image that will

be used on the Web or on multiple platforms. Cannot be used with

True Color output type.

● JPEG. JPEG is a compressed file format for images. Its strengths

are small file sizes and speed. The trade-off for these advantages,

though, is reduced image quality. Because each time an image is

compressed with JPEG it loses a little of the image data, avoid

compressing a file with JPEG more than once. JPEG is an

appropriate file format for an image that will be used on the Web or

on multiple platforms.

You can save your JPEG file as a progressive JPEG. When used

on a Web page, a progressive JPEG is initially sent as just every

other line, with the remaining lines sent immediately after. This

allows a (somewhat blurry) image to display sooner. Most people

prefer this. JPEG can be used only with True Color and Grayscale

output types.

● PNG. A compressed image file format that might replace GIF. Like

GIF, PNG uses non-lossy compression, which means all the visual

data is saved and restored when the file is decompressed. Unlike

GIF, PNG can be used with True Color and Grayscale output

types.

● PICT. Apple's proprietary image file format that is used by the

Macintosh operating system. Designed for the screen, this format

is best used for color images that will not be printed. Images saved

as PICT files are smaller in size than images saved as a TIFF files.

● PDF. PDF is a format useful for text, photos, and drawings. Use

Adobe Acrobat

Reader to view PDF files. If no changes need to

be made to the file, this file type is useful for sharing (as through e-

mail) and filing because of its generally small file size. When using

the Macintosh version of the scanning software, you can only

create image-only PDF files; you cannot copy text from these files.

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