Two-stage intelligent detection system of pixel-level classification and damage type recognition for membrane materials

•A deep learning dataset of normal and damaged membrane images was established through test platform of plane bidirectional tensile membrane structure.•A two-stage intelligent detection system of pixel-level classification and damage type recognition for membrane materials was proposed.•The normal and damaged membrane images classification method is developed based on pixel difference for the reason that there are many useless redundant data due to the monotonicity of membrane images and the diversity of damage types.