Neutron Imaging
Oak Ridge National Laboratory

IPTS-34718 data analysis – part 2

In this second tutorial, we want to produce something like this plot.

 

 

Register images

First we need to register the images to make sure there is any movment of the sample during the full acquisition. For this, we need to use the registration notebook.

Normalization

We need to normalize the  data by dividing all the images by the first image of the stack
For this, we need to use the normalization notebook (https://neutronimaging.ornl.gov/tutorials/imaging-notebooks/normalization/manual-normalization/) where the ob will be the first image of the stack
Select all the OCV_#### runs as open beam. The program will take the average of them to normalize the rest of the data.

 

Crop the data

Time to use the crop feature of imageJ to only keep the data of interest (you may need to use the slider at the bottom to have enough contrast to select the right region).

Profile

Now we will use the profile notebook again to get the profile over the entire stack. I recommend working with a subset of the data at a time as it takes a long time to load the data into the profile UI. Here is the notebook to use (https://neutronimaging.ornl.gov/tutorials/imaging-notebooks/profile/linear-profile/) .

 

Custome notebook

At this point, run the second notebook called data_analysis_from_mean_region_to_plots.ipynb and load the data exported in the profile notebook.