Further reading

The following are the various references from various sources:

• Lecture notes from http://fy.chalmers.se/~romeo/RRY025/notes/E1.pdf and http://web.pdx.edu/~jduh/courses/Archive/geog481w07/Students/Ludwig_ImageConvolution.pdf
• These slides (https://web.cs.wpi.edu/~emmanuel/courses/cs545/S14/slides/lecture10.pdf) by Prof. Emmanuel Agu
• This lecture from Oxford university: http://www.robots.ox.ac.uk/~az/lectures/ia/lect2.pdf