Changeset 5530
- Timestamp:
- Apr 2, 2023 4:02:49 PM (2 years ago)
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- 1 edited
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TabularUnified trunk/help/gsasII.html ¶
r5528 r5530 10153 10153 used due to detector irregularities, shadows of the beam stop, single-crystal 10154 10154 peaks from a mounting, etc. Masks can be created with a menu command or with 10155 keyboard/mouse shortcuts. There are fivetypes of masks:<o:p></o:p></span></p>10155 keyboard/mouse shortcuts. There are six types of masks:<o:p></o:p></span></p> 10156 10156 10157 10157 <p class=MsoListParagraphCxSpFirst style='text-indent:-.25in;mso-list:l41 level1 lfo39; … … 10200 10200 mask are used for integration. Only one frame mask can be defined. <o:p></o:p></span></p> 10201 10201 10202 <p class=MsoListParagraphCxSpLast style='text-indent:-.25in;mso-list:l41 level1 lfo39; 10203 tab-stops:list .5in'><![if !supportLists]><span style='font-family:Symbol; 10204 mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;color:#4A4A4A'><span 10205 style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> 10206 </span></span></span><![endif]><b><span style='color:#4A4A4A'>Pixel mask</span></b><span 10207 style='color:#4A4A4A'>: occludes individual pixels that are found in a 10208 pixel mask search, which looks for pixels that have intensities that 10209 are significantly higher or lower than the median intensity for all 10210 pixels in a ring having the same 10211 two-theta value. Controls for the pixel mask search are found here and 10212 include the threshold for exclusion, which is expressed as a multiple of the 10213 standard deviation for the two-theta ring; the minimum and maximum 10214 two-theta value to be used in the search; and if the search should 10215 replace any previous pixel map search(es) or should be added to the 10216 previous pixel mask search. Finally, a button allows a previous pixel 10217 mask to be cleared.<o:p></o:p></span></p> 10218 10202 10219 <h5><span style='mso-fareast-font-family:"Times New Roman"'>What can I do here?</span></h5> 10203 10220 … … 10227 10244 style='color:#4A4A4A'>: occludes inside a circular region of the image.<o:p></o:p></span></p> 10228 10245 10246 <blockquote> 10229 10247 <p><b><span style='color:#4A4A4A'>Create Spot masks</span></b><span 10230 10248 style='color:#4A4A4A'> after a menu command by clicking on the location on the … … 10263 10281 style='color:#4A4A4A'> by <a href="#Mac_rightclick">right-clicking*</a> inside 10264 10282 the mask and then dragging to change the mask size. <o:p></o:p></span></p> 10283 </blockquote> 10265 10284 10266 10285 <p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto; … … 10275 10294 calibration (e.g. a Bragg diffraction ring).<o:p></o:p></span></p> 10276 10295 10296 <blockquote> 10277 10297 <p><b><span style='color:#4A4A4A'>Create Ring masks</span></b><span 10278 10298 style='color:#4A4A4A'> with a menu command and then by left-clicking on the … … 10295 10315 on the inner or outer circle and drag the the circle change spacing between the 10296 10316 inner and outer circle. <o:p></o:p></span></p> 10317 </blockquote> 10297 10318 10298 10319 <p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto; … … 10308 10329 azimuthal angle. <o:p></o:p></span></p> 10309 10330 10331 <blockquote> 10310 10332 <p><b><span style='color:#4A4A4A'>Create Arc masks</span></b><span 10311 10333 style='color:#4A4A4A'> with a menu command and then by left-clicking on at the … … 10334 10356 on the upper or lower arc limit (the straight lines) and drag them to change 10335 10357 the arc azimuthal range. <o:p></o:p></span></p> 10358 </blockquote> 10336 10359 10337 10360 <p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto; … … 10343 10366 inside the polygon mask are not used for integration. <o:p></o:p></span></p> 10344 10367 10368 <blockquote> 10345 10369 <p><b><span style='color:#4A4A4A'>Create Polygon masks</span></b><span 10346 10370 style='color:#4A4A4A'> with a menu command and then by left-clicking … … 10361 10385 vertex and dragging. A new point is added to the mask immediately after the 10362 10386 selected point at the position where the mouse is released. <o:p></o:p></span></p> 10387 </blockquote> 10363 10388 10364 10389 <p class=MsoListParagraph style='margin-left:.25in;mso-add-space:auto; … … 10371 10396 the frame mask are used for integration. Only one frame mask can be defined. <o:p></o:p></span></p> 10372 10397 10398 <blockquote> 10373 10399 <p><b><span style='color:#4A4A4A'>Create a Frame mask</span></b><span 10374 10400 style='color:#4A4A4A'> with a menu command and then by left-clicking … … 10391 10417 vertex and dragging. A new point is added to the mask immediately after the 10392 10418 selected 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; 10422 text-indent:-.25in;mso-list:l46 level1 lfo40;tab-stops:list .25in'><![if !supportLists]><span 10423 style='color:#4A4A4A'><span style='mso-list:Ignore'>6.<span style='font:7.0pt "Times New Roman"'> 10424 </span></span></span><![endif]><b><span style='color:#4A4A4A'>Pixel mask</span></b><span 10425 style='color:#4A4A4A'>: occludes individual pixels that are found in a 10426 pixel mask search, which looks for pixels that have intensities that 10427 are higher or lower by a threshhold than the median intensity for all 10428 pixels in a ring with the same 10429 two-theta value. By default this mask contains no pixels, 10430 but 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 10434 style='color:#4A4A4A'> using either the Operations->"Pixel mask 10435 search" or the Operations->"Multi-IMG pixel mask search" menu 10436 commands. This searches for pixels that have intensities that 10437 are significantly higher or lower than the median intensity for all 10438 pixels in a ring having the same two-theta value. The threshold for 10439 exclusion is determined by the standard deviation for the pixels in 10440 the ring multiplied by a user-supplied value. 10441 </span><span 10442 style='mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast; 10443 color:#4A4A4A'><o:p></o:p></span></p> 10444 </blockquote> 10393 10445 10394 10446 <p><a name="Mac_rightclick"><span style='color:#4A4A4A'>*</span></a><span … … 11824 11876 </span></div> 11825 11877 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 17:03:04CDT 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 --> 11827 11879 </body> 11828 11880
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