The ISO 21227-3:2007 standard "Paints and varnishes - Evaluation of defects on coating surfaces using Optical inspection imagery, Part 3: Evaluation of delamination and corrosion around the scribe" describes a method for evaluating the degree of delamination and corrosion around the coating scribe area through digital Optical inspection imagery technology. This method provides a more objective, accurate, quantitative and repeability evaluation result for surface damage, overcoming the subjectivity of traditional artificial vision assessments. This standard is suitable for scribed corrosion testing according to standards such as ISO 9227, ISO 11997-1 or ISO 11997-2 and is an important tool for surface coating mass control.