Difference: 20161014_MSciSpectroscopyMeeting (1 vs. 6)

• plot_figures.zip: James' plots

• Plot for clad for grating of 10mm:
  

• Calib_cd_0.00.txt: All of the local peaks and its location in the x axis for cad_plt_0.00 plot

• Calib_cd_6.50.txt: All of the local peaks and its location in the x axis for cad_plt_6.50 plot

• Calib_cd_10.0.txt: All of the local peaks and its location in the x axis for cad_plt_10.00 plot

• This figure shows a plot of the number of photoelectrons as a function of pixel position, the plots on the top are with the original values, the plots on the bottom are where the average is taken for the 10 adjacent values.
• Plot for Cd calibration for grating of 0.00mm:
  

• Plot for Cd calibration for grating of 6.50mm:
  

• Plot for Cd calibration for grating of 10.00mm:
  

• Plot for Cd calibration with the shutters closed:
  

• This Figure shows the plot of the pixal value against the number of photoelectrons, the plots on the top are with the original values, the plots on the bottom are where the average is taken for the 10 adjacent values.
• Plot for cadmium calibration for grating of 0mm:
  

• Plot for cadmium calibration for grating of 6.5mm:
  

• Plot for cadmium calibration for grating of 10.0mm:
  

• Plot for cadmium calibration with the shutters closed:
  

• Median filter test on the Cd spectrum image at 1.50mm with size=4:
  
• Top images are pre filter, bottom are post filter.
• Spectrums are the number of photoelectrons as a function of the pixel position
• Adjusting the size to 1 yields no removal, size = 2 gives mediocre removal and increasing the size past 4 gives no further improvement.

• Median blur test on the Cd spectrum image at 1.50mm with ksize=3:
  
• Adjusting the ksize to 1 yields no removal and increasing the ksize past 3 gives no further improvement.

• Both scipy.ndimage.filters.median_filter and cv2.medianBlur remove hot pixels from this test image with mostly the same result.

• Median filter test on the 20s dark frame with median_filter size 4:
  

• Median blur test on the 20s dark frame with ksize=3:
  

• Reducing the size and ksize below 4 and 3 respectively yields minimal noise reduction.
• If removing the hot pixels from the spectrum images works, is processing the dark frames a requirement?

• Median filter test on the Cd spectrum image at 6.50mm with size 4:
  

• Median blur test on the Cd spectrum image at 6.50mm with ksize=3:
  

• Testing code on a much brighter section of the spectrum (6.50mm) also shows hot pixel reduction

• hot_pixel.py.txt: Hot pixel removal test code - python - 20161013

-- WillBurrows - 13 Oct 2016