The phobos image contains three neighbouring columns, which are
brighter than their surroundings. Find them and correct them by
scaling them with an approprate factor.
Create and plot a large image made up of the following four
images:
- -
- phobos with bad spots,
- -
- bad spots,
- -
- phobos without bad spots,
- -
- phobos with corrected line.
Start with the original image.