Median Filter Analysis

Here we analyze the efficacy of the median filter for the All-sky camera analysis.

We begin with an unfiltered image:

fits.png

We seek to remove the point sources while minimizing the filter size (to maximize efficiency and minimize loss)

fits_15.png

fits_10.png

fits_5.png

We determine that a filter size of 10 pixels (10x10) does a reasonable job. A plot of the time of execution vs. filter order is below.

filter_time.png

The code used to generate the above plots is here: calc_median.py