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- Data processing with Workflows
- Running scripts in the Python perspective
- Visualising multidimensional data in DExplore Hyperview
- Creating movies from HDF5 stacks
- Diffraction ring image calibration
This tutorial is not designed to be worked through in order! Pick the section you find most useful and go for it!
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- Open DAWN, go to the Help - > Cheatsheets and from the Cheat Sheet Selection go to Workflows and pipelines and open the Workflow and pipelines tutorials.
- Follow the tutorial Take a Tour of Workflows which will guide you through building a simple Workflow which displays a message box, as shown below:
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Experiment with writing scripts to analyse data (either the example data or your own), the instructors in the class will be happy to help with any questions/problems you might have.
DExplore Hyper3D
Hyper3D is a view added to DExplore for visualising 3 dimensional datasets. DAWN 1.2 contains the first version with this view, included for user feedback and collecting further requirements.
The Hyper3D view was specifically designed to work with hyperspectral image datasets (stacks of images where each images corresponds to a different wavelength and a single pixel traced down the stack is a spectrum), but it also works well for other stacks of images.
- Go the the DExplore perspective and open the example file 315029.dat.
- Select the Pilatus dataset, and in the dataset inspector select Hyper3D from the inspector tab
- What shape is this dataset?
- Select eta as the trace-coord, drag the Hyper3D view to a convenient place and double click the tab to maximise the view
The two plots in this view show different sections of the 3D pilatus dataset. The image shows the dimensions perpendicular to the dimension selected as the trace-coord. The actual image shown is an integration of the image stack over the window shown in the trace plot on the right.
- Move the region on the right hand plot, what happens to the image on the left hand plot?
The trace in the right hand plot shows the average of all the traces corresponding to the pixels selected by the box region on the image.
- Move the region on the left hand plot, what happens to the trace on the right hand plot?
- Add more regions to the image, using the Create New Profile toolbar action. Traces can be exported to a .dat file using the Export... toolbar action.
Experiment with your own 3D datasets (or ask for more exciting datasets), the instructors in the class will be happy to help with any questions/problems you might have.
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None of the example files shipped with DAWN are suitable for this section so please use your own data or ask the instructors for an appropriate file.Make
- Make sure the HDF5 file is in one of the data project folder, navigate to the file, right click and select Convert - Convert Wizard...
- Select the conversion type video from image stack and click Next
- Make sure the correct dataset is selected, the output file name is OK, then adjust the parameters in the advanced area to optimise the histogramming, downsampling (larger downsampling, smaller file) and frame rate.
- Finally select the orientation of the dataset to animate through using the slicing options and click Finish.
After clicking finish a progress bar will appear on the wizard, when the wizard is finished the avi movie file should appear in the chosen output folder.
The End?
Congratulations, you have reached the end of the DAWN training sessions! You should now be familiar with most of the general data visualisation and analysis features in the current version of DAWN.
Please keep in mind these sheets for future reference, it may also be worth checking periodically for updates and new features as new versions of DAWN are released.
Thank you for participating in this training series, if you have any feedback please use the feedback form in the DAWN help menu, giving the feedback the title "Dawn Training".
