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<head><title>Tasks</title>
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<h3 class="sectionHead"><span class="titlemark">5.8 </span> <a
id="x30-520005.8"></a>Tasks</h3>
<!--l. 491--><p class="noindent" ><a name="nip_label_sec:menu-tasks"></a>
<!--l. 493--><p class="indent" > This menu repeats many items from other menus, but
tries to group them by tasks they are useful for, rather than
by function.
<!--l. 496--><p class="noindent" >
<h4 class="subsectionHead"><span class="titlemark">5.8.1 </span> <a
id="x30-530005.8.1"></a>Capture</h4>
<!--l. 497--><p class="noindent" ><a name="nip_label_sec:menu-capture"></a>
<!--l. 499--><p class="indent" > This menu groups operations which are useful in
capturing images, or for the initial processing you might
want to do to an image captured from another program.
<dl class="description"><dt class="description">
<span
class="phvb7t-x-x-80">CSV Import</span> </dt><dd
class="description">Import an image from a CSV file, with a
few controls.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Interpret Analyze 7 Header</span> </dt><dd
class="description">Read the meta fields for
volume layout and calibration from the Analyze
header and reformat the image appropriately.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Capture Video Frame</span> </dt><dd
class="description">This menu item will currently
only work on Linux machines with a compatible
video4linux capture card. See <span
class="cmsy-10"></span><a
href="nipguidese4.html#x11-130003.1.1">3.1.1<!--tex4ht:ref: sec:vidpref --></a> for notes on
how it works.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Smooth</span> </dt><dd
class="description">Use this to remove texture from images. It’s
handy in conjunction with <span
class="phvr7t-x-x-80">Flatfield</span>.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Flatfield</span> </dt><dd
class="description">Use this to correct homogeneity. Select an
image of a piece of white (or mid-grey) card, then
select the image to correct, then click <span
class="phvr7t-x-x-80">Flatfield</span>. Use
<span
class="phvr7t-x-x-80">Smooth </span>to renmove texture from the white card if
necessary.
<!--l. 527--><p class="noindent" >You can select a single white and a group of images
to correct a large set in one step </dd><dt class="description">
<span
class="phvb7t-x-x-80">White Balance</span> </dt><dd
class="description">Use this to move the white point to make
an area of the image you know to be white, white.
Mark a region on an image, enclosing a patch you
know to be white. Select the region and the image
and click on <span
class="phvr7t-x-x-80">White Balance</span>.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Find Colour Calibration</span> </dt><dd
class="description">Use this to colour calibrate an
image. Drag a region enclosing an image of a
Macbeth Color Checker Chart and click <span
class="phvr7t-x-x-80">Find Colour</span>
<span
class="phvr7t-x-x-80">Calibration</span>.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Apply Colour Calibration</span> </dt><dd
class="description">Use this to apply the transform
calculated by the previous item to another image.
Select the calibration object, select the RGB
image you want calibrated, and click <span
class="phvr7t-x-x-80">Apply Colour</span>
<span
class="phvr7t-x-x-80">Calibration</span>.
</dd></dl>
<!--l. 548--><p class="noindent" >
<h4 class="subsectionHead"><span class="titlemark">5.8.2 </span> <a
id="x30-540005.8.2"></a>Mosaic</h4>
<!--l. 549--><p class="noindent" ><a name="nip_label_sec:menu-mosaic"></a>
<!--l. 551--><p class="indent" > The items in this menu are discussed in appalling detail in
Chapter <a
href="nipguidech3.html#x10-90003">3<!--tex4ht:ref: sec:ir --></a>.
<dl class="description"><dt class="description">
<span
class="phvb7t-x-x-80">One Point</span> </dt><dd
class="description">Join two images left-right or top-bottom
with a simple translation. Mark a point on each
image to be joined (open image view window,
Ctrl-left-click, drag to position), then click on the
mosaic button. The operation performs elaborate
tie-point adjustment, so your selection of a
common feature does not have to be exact.
<!--l. 564--><p class="noindent" >The <span
class="phvr7t-x-x-80">Manual </span>versions do not perform automatic
tie-point correction and are useful when joing very
difficult images.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Two Point</span> </dt><dd
class="description">Do a join, but allow the right-hand (or
bottom) image to rotate and scale if it will improve
the match. You need to pick two points on each
image.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Balance</span> </dt><dd
class="description">Break a mosaic apart, examine average pixel
value in the overlap regions, adjust brightness to
match, and reassemble. This only works for images
which have been produced just by mosaic joins!
If you’ve done anything else to the image since
loading it, the balance will fail with a mysterious
message.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Manual Balance</span> </dt><dd
class="description">Adjust the brightness in a set of masked
areas to match. Useful for removing shadows.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Rebuild</span> </dt><dd
class="description">Use this to mosaic up one set of files based on
joins you made in another. Breaks a mosaic part to
component files, performs a string substitution on
the file names, and reassembles.
</dd><dt class="description">
<span
class="phvb7t-x-x-80">Clone Area</span> </dt><dd
class="description">Select over- or under-exposed pixels in one
image and replace them with the corresponding
pixels from another image. Useful for removing
lead numbers used to identify X-ray plates.
<!--l. 593--><p class="noindent" >The function operates on two 8-bit mono images.
Move and resize the region on the first image to
define the area around the white number. Move
the region on the second to overlapping area. A
section of the area on the second image is cloned
and blended into the first image. The amount of
the defined area to be cloned in defined by a slider
within the output image.
</dd></dl>
<!--l. 603--><p class="noindent" >
<h4 class="subsectionHead"><span class="titlemark">5.8.3 </span> <a
id="x30-550005.8.3"></a>Picture Frame</h4>
<!--l. 604--><p class="noindent" ><a name="nip_label_sec:menu-picture-frame"></a>
<!--l. 606--><p class="indent" > Items useful for mocking up painting frames.
<!--l. 608--><p class="noindent" >
<h4 class="subsectionHead"><span class="titlemark">5.8.4 </span> <a
id="x30-560005.8.4"></a>Print</h4>
<!--l. 609--><p class="noindent" ><a name="nip_label_sec:menu-print"></a>
<!--l. 611--><p class="indent" > Items useful while preparing an image for printing.
<dl class="description"><dt class="description">
<span
class="phvb7t-x-x-80">Sharpen</span> </dt><dd
class="description">Sharpen an image for printing. This is a
version of <span
class="phvr7t-x-x-80">Filter </span>/ <span
class="phvr7t-x-x-80">Convolution </span>/ <span
class="phvr7t-x-x-80">Unsharp Mask </span>tuned
for typical inkjet printers. </dd><dt class="description">
<span
class="phvb7t-x-x-80">Adjust Tone Curve</span> </dt><dd
class="description">Adjust the reproduction tone curve in
LAB. Most useful for offset work, especially from
transparencies.
</dd></dl>
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