Opening and Scanning Files

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To open a document in Imaging, simply use the File menu's Open command. You can do this from either the preview program or the full program. The only point to note here is that the Files Of Type list, at the bottom of the File Open dialog box, always defaults to the last file type you used. If the file you opened or saved most recently used the .tif format, for example, the File Open dialog box initially shows only .tif files. To see another file type—or all supported file types—make your selection from the Files Of Type list.

To acquire an image from your scanner, you must be in the full program, and you must have a TWAIN-compliant scanner installed. If you have more than one such scanner, use the File menu's Select Device command to choose the one you want to use. Then choose Acquire Image from the File menu. This command activates your scanner driver, which might ask you for further information—such as the nature of the source image and the resolution at which you want to scan. Once your scanner has finished its work, the image you scanned appears in Imaging's main window.

NOTE
The Acquire Image command creates a new document from the scanned image. You can also append or insert a scanned image as a new page in an existing document. See "Adding Pages to a Document."

Setting Compression Options

The Tools menu's Scan Options command, depicted in Figure 37-2, lets you specify the kind of compression that Imaging will apply to your scanned data. The default option, Best Display Quality, applies loss-less compression, which means that your scanned image retains as much color and resolution detail as the scanning operation supplies. The resulting file can be quite large, however. The Smallest File Size option performs a lossy compression, which generates a dramatically smaller file, but one that may lack perfect fidelity to the source image. The Good Display Quality And Small File Size option is a compromise between these two extremes.

Figure 37-2. The Scan Options dialog box lets you change the mode of compression that Imaging applies to data supplied by your scanner.

If you select Custom and click the Settings button, Imaging displays a second dialog box, shown in Figure 37-3. The various tabs in this dialog box show the method of compression that Imaging is currently set to apply to each of six document types—black and white, 16 shades of gray, 256 shades of gray, 16 colors, 256 colors, and true color. You can select alternative compression methods from the Compression boxes on each of these tabs.

Figure 37-3. In the Custom Scan Settings dialog box, you can change the default compression method used for any of six document types.

Transfer Mode Options

By clicking the Advanced button in the Scan Options dialog box (see Figure 37-2), you can specify the manner in which Imaging allocates memory to a scan operation. In the default mode, called Memory, Imaging allocates one block of memory at a time. In the alternative mode, called Native, Imaging allocates one large block of memory at the beginning of the scan. Native makes for a quicker scan but can cause Imaging to allocate more memory than is actually needed. If memory isn't abundant on your system, you'll probably want to stick with the Memory option.



Running Microsoft Windows 2000 Professional
Running Microsoft Windows 2000 Professional
ISBN: 1572318384
EAN: 2147483647
Year: 2000
Pages: 317

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