Contours
This guide shows a few different ways to measure and visualize contours of images.
Using Plots
The most basic way to create a contour plot is simply to use Plots.jl contour
and contourf
functions on your image.
Let's see how that works:
using AstroImages, Plots
# First load a FITS file of interest
fname = download(
"http://www.astro.uvic.ca/~wthompson/astroimages/fits/herca/herca_radio.fits",
"herca-radio.fits"
)
herca = load("herca-radio.fits")
Create a contour plot
contour(herca)