Remote sensing image blind watermark scheme capable of effectively resisting affine transformation

The invention discloses a remote sensing image blind watermark scheme capable of effectively resisting affine transformation, which comprises the following steps: firstly, extracting feature points with affine invariance in an image through an ASIFT algorithm, screening a proper amount of stable feature points according to a feature scale, and constructing a corresponding feature region; then, performing normalization processing on the feature region by using an affine invariant moment; then performing Arnold transformation on the watermark image to obtain scrambled watermark information; and finally, embedding the watermark into a sub-region positioned by the centroid of the feature region according to a quantization rule, carrying out reverse normalization on a difference image of the feature region before and after the watermark is embedded, and finally, superposing the reverse normalization difference image on the feature region of the original image to complete embedding of the watermark. The watermark s