I have found a certain sequence of filters that cleans the image up quite well, but, while I can somewhat explain the logic behind each filter choice, the choice is dependent on how the image looked after it passed and not the general state of an image. If I explain how the image looked and why I decided to do each step, is that good enough for the question?
On a similar note, since I do a number of operations on the image, the process is quite slow (still less than a minute on my laptop). Will efficiency be taken into account, assuming it runs under 1-2 minutes?
In general from my experience image processing is considered a heavy task.