Image denoising method on surface of steel strip based on partial differential equations

Affine morphological scale space (AMSS) arithmetic operators were obtained by adopting finite difference method to improve denoising performance of the filter in surface defect image of steel strip and maintaining the detail information of the defect image. The classical invariant property and affine invariant property were analyzed based on theory of partial differential equation. AMSS arithmetic operators were tested to eliminate noise in surface defect image of steel strip, and results show that the method can eliminate noise while maintaining detail informations.