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      <div xmlns:adobe="http://www.adobe.com/saxon" class="contentmap"><a href="index.html?topicId=WS5b3ccc516d4fbf351e63e3d117cbc98bab-7fbd.html">CONTENTS</a></div>
      
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<ul xmlns:adobe="http://www.adobe.com/saxon" class="navigation"><li class="prev"><a accesskey="p" class="prev" href="WS141BE20E-D113-4865-9F3A-C9FC08B1D793.html" title="Evaluating brightness and color with histograms"><img src="images/blank.gif" alt="Previous" width="17" height="17" /></a></li><li class="next"><a accesskey="n" class="next" href="WS5b3ccc516d4fbf351e63e3d117cbc98bab-7fc6.html" title="Maintaining consistent color for background keying"><img src="images/blank.gif" alt="Next" width="17" height="17" /></a></li></ul><div xmlns:adobe="http://www.adobe.com/saxon" class="hierarchy" id="hierarchy"><a href="index.html">Using Adobe OnLocation CS5</a> : <a href="WS5b3ccc516d4fbf351e63e3d117cbc98447-7fdf.html"><b>Analyzing lighting, exposure, and color</b></a> 
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        <h1>
          Analyzing color with the Vectorscope
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        <div xmlns:adobe="http://www.adobe.com/saxon" id="minitoc"><div class="t"><div class="b"><div><ul id="minitoc-links"><li><p><a href="#WS143652FA-F036-4470-B366-AB6A6F0F1E8A"><h1 class="topictitle1">Checking white balance, continuity, and key color with the Vectorscope</h1>
</a></p></li><li><p><a href="#WS5b3ccc516d4fbf351e63e3d117cbc98bab-7fd6"><h1 class="topictitle1">Configure the Vectorscope</h1>
</a></p></li></ul></div></div></div></div><div><p>The Vectorscope
represents pixel color in a circular graticule divided into sectors by
chrominance. A signal on or near the center of the graticule represent
pixels with little or no color—black, white, and grays. The greater
the distance from the center, the more saturated the color.</p>
<p>The outer circle of the Vectorscope represents the boundary for
legal color values in the broadcast industry. If the signal extends
outside the circle, television stations might not be able to broadcast
the video.</p>
<p>The Vectorscope can analyze either the full frame or a single
horizontal line. In Full mode, the scope is additive in nature;
a point is added to the signal for each pixel. The brightness of
the signal in any given region reflects the number pixels in that
region. Bright areas like those near the green and blue targets
in the following example indicate that the frame has many pixels
of similar colors. The Gain and Intensity settings also directly
affect the brightness of the signal.</p>
<div xmlns:fn="http://www.w3.org/2005/xpath-functions" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:xs="http://www.w3.org/2001/XMLSchema" class="fignone"><img alt="" id="al_3_ComponentScreenshot" src="images/al_3_ComponentScreenshot.png" /><dl><dt class="dlterm">A.</dt>
<dd>Red</dd><p class="dlseparator"></p><dt class="dlterm">B.</dt>
<dd>Magenta</dd><p class="dlseparator"></p><dt class="dlterm">C.</dt>
<dd>Yellow</dd><p class="dlseparator"></p><dt class="dlterm">D.</dt>
<dd>Green</dd><p class="dlseparator"></p><dt class="dlterm">E.</dt>
<dd>Cyan</dd><p class="dlseparator"></p><dt class="dlterm">F.</dt>
<dd>Blue</dd><p class="dlseparator"></p></dl>
</div><div class="tip"><img src="images/tip_help.png" />If you prefer a traditional, green vector display,
select Monochrome in the Appearance section of the Preferences dialog
box.</div><ul class="navlinklist"></ul>
</div>
<div id="WS143652FA-F036-4470-B366-AB6A6F0F1E8A" class="nochunk"><a name="WS143652FA-F036-4470-B366-AB6A6F0F1E8A"><!-- --></a><h2 class="topictitle2">Checking white balance, continuity, and key color with the Vectorscope</h2><div><p>The Vectorscope has several advantages, particularly if
the only alternative is the camera’s small LCD flip-out screen.
Flip-out screens often overemphasize saturation, especially of primary
colors. To check the white balance, place a sheet of blank white
paper in front of the camera. The Vectorscope indicates how far the
white balance is off, and in which direction. </p>
<p>If you toggle the Field Monitor between clips and cameras, the
Vectorscope can help you maintain color continuity between them.
For example, you can address a shift in skin tone from a subtle
lighting change or match the hue from two different camera angles.
Maintaining color continuity during a shoot prevents difficult color
correction in postproduction.</p>
<p>If you’re shooting against a greenscreen or bluescreen, the Vectorscope
helps ensure that the background color is sufficiently saturated
for easy and effective keying. For more information, see <a href="WS5b3ccc516d4fbf351e63e3d117cbc98bab-7fc6.html">Maintaining consistent color for background keying</a>.</p>
</div></div>
<div id="WS5b3ccc516d4fbf351e63e3d117cbc98bab-7fd6" class="nochunk"><a name="WS5b3ccc516d4fbf351e63e3d117cbc98bab-7fd6"><!-- --></a><h2 class="topictitle2">Configure the Vectorscope</h2><div><p>The following settings appear at the top of the Vectorscope:</p>
<dl><dt class="dlterm">Gain</dt>
<dd xmlns:fn="http://www.w3.org/2005/xpath-functions" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:xs="http://www.w3.org/2001/XMLSchema">Changes the brightness of the point painted for each pixel
in the image. By decreasing the gain, you emphasize only colors
that are common in the image. Conversely, increasing the gain accentuates
the display for colors that appear only sparsely in the image.</dd><p class="dlseparator"></p><dt class="dlterm">Intensity and Illumination</dt>
<dd xmlns:fn="http://www.w3.org/2005/xpath-functions" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:xs="http://www.w3.org/2001/XMLSchema">Control the brightness of the vector display and the brightness
of the graticule, respectively.</dd><p class="dlseparator"></p><dt class="dlterm">Line mode and Full mode</dt>
<dd xmlns:fn="http://www.w3.org/2005/xpath-functions" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:xs="http://www.w3.org/2001/XMLSchema">Switch between analyzing the full image and a single line
of video. In Line mode, drag across the value to scroll up and down
the frame; a white line appears in the Field Monitor indicating
the current line.<div class="tip"><img src="images/tip_help.png" /> To hide the line in the
Field Monitor, click a panel other than the Vectorscope.</div></dd><p class="dlseparator"></p></dl>
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