by: luis fuentes-montero (luiso) esmeralda, program for treating laue images
TRANSCRIPT
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By: Luis Fuentes-Montero(Luiso)
Esmeralda,Esmeralda,program for treating Laue imagesprogram for treating Laue images
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What does ESMERALDA do?
• Image Visualizations• Algorithms for finding peaks• Tools for crystal orientation• Intensity integration• Saves files to be used at next stages
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Image HandlingDifferent colour Palettes
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Image HandlingAdjustable contrast
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Image Handling• 3D view
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Image Handling
Peak finding Tool
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Image Handling
Peak finding Tool
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Image Handling Peak finding Tool
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Image Handling Peak finding Tool
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Three algorithms for orienting the crystal automatically
Angular comparison
• The fastest one• Almost completely
automatic• No need of starting
point• Almost always finds
a solution
All Possible rotations
• The Slowest one• Completely automatic• If there is a starting
point becomes not so slow
• Always finds a solution
• Almost as fast as angular comparison
• Almost completely automatic
• No need of starting point
• Always finds a solution
Scanning and successive approaches (Renninger rotations)
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Orienting with Esmeralda
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orienting the crystal
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orienting the crystal
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Evolution and improvement in the peak integration algorithm
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Peak integration Background subtraction
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Peak integration
Background Treatment
I1
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Peak integration Background subtraction
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Peak integration Pixel treatment
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Peak integration Pixel treatment
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Peak integration Pixel treatment
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Peak integration
d1
d2
Pixel treatment
P
I1
I2(-312.6782 , -50.82541 ) I= 373636.9 (-307.6769 , -49.22461 ) I= 145032.8
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Integration along a curve
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Steps to follow (time to run Esmerlada)
• Edit cfl file with new cell• Open cfl file• Open image(s)• Adjust contrast• Find peaks• Select nodal peaks• View calculated spots and compare with the experimental
ones (in quantity)• Adjust wavelength parameters• Try to orient a few times with automatic algorithms.• Try to orient manually.• Have a look at the symmetry and compare calculated-
experimental
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peculiarities of stereographic projection
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peculiarities of stereographic projection
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peculiarities of stereographic projection
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peculiarities of stereographic projection
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