Windows XP [Electronic resources] : Visual Quickstart Guide, Second Edition نسخه متنی

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Windows XP [Electronic resources] : Visual Quickstart Guide, Second Edition - نسخه متنی

Chris Fehily

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Using Scanners




Transferring Photos to Your Computer" earlier in this chapter, with these differences:


On the Choose Scanning Preferences page, specify black-and-white, color, or grayscale scanning and the part of the page you want scanned.


On the Picture Name and Destination page, select an image format listed in


Table 9.1 .





Table 9.1. Image-File Formats



FORMAT DESCRIPTION




Bitmap


Windows bitmap (.bmp) images tend to be large, because this format can't be compressed. BMP is almost always the wrong choice for scanned documents and photos.


JPEG


Joint Photographic Experts Group (.jpg/.jpeg) files are highly compressed and an excellent choice for scanning photos, particularly if you're going to post them on the web. But the JPEG process sacrifices image detail permanently during compression. In most cases, the loss is invisible for onscreen viewing.


PNG


Portable Network Graphics (.png) files, which all modern browsers support, is patent- and license-free, and retains all detail during compression.


TIFF


Tagged Image File Format (.tif) files are compatible with most image-editing programs, even ancient ones. TIFF is a good choice for scanning text documents and grayscale images. TIFF's compression, like PNG's, preserves detail but results in larger files than JPEG. You can scan multiple pages into a single TIFF file; the Windows Fax program does this to store faxes.



Tip


If you save an image in the wrong format, you can open it in Paint and save it in another format by choosing File > Save As. To open Paint, choose Start > All Programs > Accessories > Paint.




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