View source for SRGS 2022


== General Info ==
* [[Media:Mini_research_projects_v2.pdf | Potential Projects Summaries]]
* [[https://jeffersonlab.sharepoint.com/:f:/r/sites/SciEdStudents/Shared%20Documents/2022_Summer/David%20Lawrence,%20Nathan%20Brei,%20Carl%20Timmer?csf=1&web=1&e=btBNDn Sharepoint Link]]

== AI Feature Recognition: Extract Spectrometer Angle from Image ==

Students:
* Anna Rosner
* William Savage

=== Useful links/info: ===
* [[Media:angle-cam-image-recognition.pdf]]
* Location of images: '''/work/hallc/shms/spring17_angle_snaps/'''
** Time image was acquired is embedded in the image file
** The numbers in the snapshot filenames are the run numbers
* The value of the encoders are stored in the MYA EPICS archive
** PV names are:
***''ecSHMS_Angle''
***''ecHMS_Angle''

=== 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.