Visual small block-based power transmission line defect picture classification method

The invention belongs to the technical field of picture classification, and discloses a visual small block-based power transmission line defect picture classification method, which comprises the following steps of: filling a power transmission line defect test image, cutting into small blocks, and carrying out feature and position encoding on the power transmission line defect image small blocks by using a defect-free image encoder, obtaining a small block coding result of the test image; performing similarity calculation on the test image small block coding result and the defect-free image coding result, judging whether the power transmission line defect image small blocks have defect small blocks or not according to the test image small block similarity comparison result, if so, classifying the defect small blocks, and if not, determining whether the defect small blocks exist in the defect-free image small blocks. And according to the classification types of the defect small blocks, determining the types of