Changeset 5530


Ignore:
Timestamp:
Apr 2, 2023 4:02:49 PM (2 years ago)
Author:
toby
Message:

add help for pixel masks

File:
1 edited

Legend:

Unmodified
Added
Removed
  • TabularUnified trunk/help/gsasII.html

    r5528 r5530  
    1015310153used due to detector irregularities, shadows of the beam stop, single-crystal
    1015410154peaks from a mounting, etc. Masks can be created with a menu command or with
    10155 keyboard/mouse shortcuts. There are five types of masks:<o:p></o:p></span></p>
     10155keyboard/mouse shortcuts. There are six types of masks:<o:p></o:p></span></p>
    1015610156
    1015710157<p class=MsoListParagraphCxSpFirst style='text-indent:-.25in;mso-list:l41 level1 lfo39;
     
    1020010200mask are used for integration. Only one frame mask can be defined. <o:p></o:p></span></p>
    1020110201
     10202<p class=MsoListParagraphCxSpLast style='text-indent:-.25in;mso-list:l41 level1 lfo39;
     10203tab-stops:list .5in'><![if !supportLists]><span style='font-family:Symbol;
     10204mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;color:#4A4A4A'><span
     10205style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     10206</span></span></span><![endif]><b><span style='color:#4A4A4A'>Pixel mask</span></b><span
     10207style='color:#4A4A4A'>: occludes individual pixels that are found in a
     10208pixel mask search, which looks for pixels that have intensities that
     10209are significantly higher or lower than the median intensity for all
     10210pixels in a ring having the same
     10211two-theta value. Controls for the pixel mask search are found here and
     10212include the threshold for exclusion, which is expressed as a multiple of the
     10213standard deviation for the two-theta ring; the minimum and maximum
     10214two-theta value to be used in the search; and if the search should
     10215replace any previous pixel map search(es) or should be added to the
     10216previous pixel mask search. Finally, a button allows a previous pixel
     10217mask to be cleared.<o:p></o:p></span></p>
     10218
    1020210219<h5><span style='mso-fareast-font-family:"Times New Roman"'>What can I do here?</span></h5>
    1020310220
     
    1022710244style='color:#4A4A4A'>: occludes inside a circular region of the image.<o:p></o:p></span></p>
    1022810245
     10246<blockquote>
    1022910247<p><b><span style='color:#4A4A4A'>Create Spot masks</span></b><span
    1023010248style='color:#4A4A4A'> after a menu command by clicking on the location on the
     
    1026310281style='color:#4A4A4A'> by <a href="#Mac_rightclick">right-clicking*</a> inside
    1026410282the mask and then dragging to change the mask size. <o:p></o:p></span></p>
     10283</blockquote>
    1026510284
    1026610285<p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto;
     
    1027510294calibration (e.g. a Bragg diffraction ring).<o:p></o:p></span></p>
    1027610295
     10296<blockquote>
    1027710297<p><b><span style='color:#4A4A4A'>Create Ring masks</span></b><span
    1027810298style='color:#4A4A4A'> with a menu command and then by left-clicking on the
     
    1029510315on the inner or outer circle and drag the the circle change spacing between the
    1029610316inner and outer circle. <o:p></o:p></span></p>
     10317</blockquote>
    1029710318
    1029810319<p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto;
     
    1030810329azimuthal angle. <o:p></o:p></span></p>
    1030910330
     10331<blockquote>
    1031010332<p><b><span style='color:#4A4A4A'>Create Arc masks</span></b><span
    1031110333style='color:#4A4A4A'> with a menu command and then by left-clicking on at the
     
    1033410356on the upper or lower arc limit (the straight lines) and drag them to change
    1033510357the arc azimuthal range. <o:p></o:p></span></p>
     10358</blockquote>
    1033610359
    1033710360<p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto;
     
    1034310366inside the polygon mask are not used for integration. <o:p></o:p></span></p>
    1034410367
     10368<blockquote>
    1034510369<p><b><span style='color:#4A4A4A'>Create Polygon masks</span></b><span
    1034610370style='color:#4A4A4A'> with a menu command and then by left-clicking
     
    1036110385vertex and dragging. A new point is added to the mask immediately after the
    1036210386selected point at the position where the mouse is released. <o:p></o:p></span></p>
     10387</blockquote>
    1036310388
    1036410389<p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto;
     
    1037110396the frame mask are used for integration. Only one frame mask can be defined. <o:p></o:p></span></p>
    1037210397
     10398<blockquote>
    1037310399<p><b><span style='color:#4A4A4A'>Create a Frame mask</span></b><span
    1037410400style='color:#4A4A4A'> with a menu command and then by left-clicking
     
    1039110417vertex and dragging. A new point is added to the mask immediately after the
    1039210418selected point at the position where the mouse is released. <o:p></o:p></span></p>
     10419</blockquote>
     10420
     10421<p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto;
     10422text-indent:-.25in;mso-list:l46 level1 lfo40;tab-stops:list .25in'><![if !supportLists]><span
     10423style='color:#4A4A4A'><span style='mso-list:Ignore'>6.<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     10424</span></span></span><![endif]><b><span style='color:#4A4A4A'>Pixel mask</span></b><span
     10425style='color:#4A4A4A'>: occludes individual pixels that are found in a
     10426pixel mask search, which looks for pixels that have intensities that
     10427are higher or lower by a threshhold than the median intensity for all
     10428pixels in a ring with the same
     10429two-theta value. By default this mask contains no pixels,
     10430but pixels are added using a search.<o:p></o:p></span></p>
     10431
     10432<blockquote>
     10433<p><b><span style='color:#4A4A4A'>Search to add to the pixel mask</span></b><span
     10434style='color:#4A4A4A'> using either the Operations->"Pixel mask
     10435search" or the Operations->"Multi-IMG pixel mask search" menu
     10436commands. This searches for pixels that have intensities that
     10437are significantly higher or lower than the median intensity for all
     10438pixels in a ring having the same two-theta value. The threshold for
     10439exclusion is determined by the standard deviation for the pixels in
     10440the ring multiplied by a user-supplied value.
     10441</span><span
     10442style='mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;
     10443color:#4A4A4A'><o:p></o:p></span></p>
     10444</blockquote>
    1039310445
    1039410446<p><a name="Mac_rightclick"><span style='color:#4A4A4A'>*</span></a><span
     
    1182411876</span></div>
    1182511877
    11826 <p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><!-- hhmts start -->Last modified: Thu Mar 30 17:03:04 CDT 2023 <!-- hhmts end -->
     11878<p class=MsoNormal style='tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><!-- hhmts start -->Last modified: Sun Apr  2 16:00:48 CDT 2023 <!-- hhmts end -->
    1182711879</body>
    1182811880
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