Catching Common Image Processing Programming Errors with Generic Unit Tests

crash test dummy

When implementing image algorithms, I am prone to make these mistakes:

  • swapping x and y;
  • working on the wrong channel;
  • making off-by-one errors, especially in window algorithms;
  • making division-by-zero errors;
  • handling borders incorrectly; and
  • handling non-power-of-two sized images incorrectly.

Since these types of errors are prevalent in many image-processing algorithms, it would be useful to develop, once and for all, general tests that will catch these errors quickly for any algorithm.

This post is about such tests.

Continue reading “Catching Common Image Processing Programming Errors with Generic Unit Tests”