Difference between revisions of "SRGS 2022"
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| − | * Project slides | + | * Project slides |
| − | * | + | * [[SciML curriculum]] |
| − | * PHASM repository: | + | * PHASM repository: [https://github.com/nathanwbrei/phasm] |
== AI Feature Recognition: Extract Spectrometer Angle from Image == | == AI Feature Recognition: Extract Spectrometer Angle from Image == | ||
Revision as of 19:12, 27 June 2022
General Info
PHASM: neural net models of PDE solvers
Students:
- Dhruv Bejugam
- Hari Gopal
- Colin Wolfe
Useful links:
- Project slides
- SciML curriculum
- PHASM repository: [1]
AI Feature Recognition: Extract Spectrometer Angle from Image
Students:
- Anna Rosner
- William Savage
Useful links/info:
- angle-cam-image-recognition.pdf
- Location of example images: /work/hallc/shms/spring17_angle_snaps/
- Time the image was acquired is embedded in the image file
- The numbers in the snapshot filenames are the run numbers
- 4,265 images ; ~92kB/file ; 391MB total
- The value of the encoders are stored in the MYA EPICS archive
- PV names are:
- ecSHMS_Angle
- ecHMS_Angle
- PV names are:
- Example logbook entry
Initial thoughts from Brad
I had been imagining splitting the photos into two regions: one with the digits, and a second with the vernier scale. Each region would be evaluated/interpreted separately with some 'optimized' algorithms. 'Real' errors/discrepancies would be best indicated by a scanning for a mismatch between MYA and the analysis database record and/or the value flagged in the logbook which has generally been vetted and updated by a human. The simplest way to test 'bad' angles would be just to (randomly) shift the truth angle by a small amount -- that would be indistinguishable from an observed drift in the EPICS encoder system. I (or the students) can also look for angle shifts in the 'real' data, but that will take some poking around. It should be indicated by a sharp (small) jump in the MYA value as an offset is changed to bring the EPICS value in agreement with the camera readback. One other dataset that I could obtain is a movie of the angle changing over a range (the movie is just a compilation of frame grabs). The individual frames could be pulled out of the mp4 and evaluated individually over a continuously varying range of angles.