Appropriate description of image processing algorithm in engineering
Your paper should focus on your contribution to the field, not to the field of image processing (if I understand your question).  Your paper will likely have some form of &quot;approach&quot; or &quot;setup&quot; section or something to the effect.  If this is a novel algorithm, you may choose to describe it there.  A common thing to use is a LaTeX &quot;Algorithm&quot; environment, and provide pseudocode.  If the algorithm is very complex or detailed, consider breaking it into pieces.  If it is truly novel, consider publishing it!
An alternative would be to have some way to publicly access the code, say github or your institution's personal websites, with an explanation there.  Again, a pseudocode algorithm is probably sufficient.
If your paper is accepted but you are asked to revise the description of the code, do so according to the comments.  Otherwise, unless there is a lot missing from the main paper's description of its contribution, your paper will not be rejected or accepted based on this detail.