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                <h1>
                    About bitmap images
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                <div><p>Bitmap
images—technically called <dfn class="term">raster images</dfn>—use a rectangular
grid of picture elements (pixels) to represent images. Each pixel
is assigned a specific location and color value. When working with
bitmap images, you edit pixels rather than objects or shapes. Bitmap
images are the most common electronic medium for continuous-tone
images, such as photographs or digital paintings, because they can
more efficiently represent subtle gradations of shades and color. </p>
<p>Bitmap images are resolution-dependent—that is, they contain
a fixed number of pixels. As a result, they can lose detail and
appear jagged if they are scaled to high magnifications on‑screen
or if they are printed at a lower resolution than they were created
for. </p>
<div class="fignone"><img alt="" id="sdw_bike_bitmap" src="images/sdw_bike_bitmap.png" /><div class="figdesc">Example of a bitmap image at different levels of magnification</div><br /></div><p>Bitmap images sometimes require large amounts of storage space,
and often need to be compressed to keep file sizes down when used
in certain Creative Suite components. For instance, you compress
an image file in its original application before you import it into
a layout.</p>
<div class="note"><span class="notetitle">Note:  </span>In Adobe Illustrator, you can create bitmap effects in your
artwork using filters, effects, and graphic styles.</div>
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