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SUMMARY:Undersampling Raster Scans in Spectromicroscopy for reduced dose a
 nd faster measurements - Oliver Townsend (University of Bath)
DTSTART:20230331T101000Z
DTEND:20230331T104000Z
UID:TALK198286@talks.cam.ac.uk
DESCRIPTION:X-ray spectromicroscopy is a powerful tool for studying materi
 al distributions\, which is extracted from the data using a combination of
  PCA and cluster analysis. However\, the traditional data collection setti
 ng has some significant weaknesses (e.g.\, long scanning times and materia
 l degradation due to x-ray radiation).In this talk\, we present a novel ap
 proach for undersampling\, reconstructing\, and analysing X-ray spectromic
 roscopic measurements based on low-rank matrix completion. The new method 
 allows the selection of robust sampling pattern\, matrix rank and undersam
 pling ratio\, while minimising the impact of undersampling on the cluster 
 analysis. Results obtained on real data will be illustrated.
LOCATION:Seminar Room 1\, Newton Institute
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