Method and system for verifying bank user identity based on image

The invention relates to an image-based bank user identity verification method and system, and the method comprises the steps: obtaining an initial face image, collected by image collection equipment, of a target user, and employing a designated dark channel prior algorithm to estimate and obtain a first transmittance of the initial face image, a brightness image is used in the specified dark channel prior algorithm to replace a dark channel image in the traditional dark channel prior algorithm, and the brightness image is a brightness image of a negation image obtained by performing negation operation after performing normalization processing on the initial face image; determining the ambient light intensity corresponding to the initial face image based on the brightness map, and substituting the ambient light intensity, the first transmittance and the initial face image into an atmospheric scattering model to obtain a first target face image; and performing negation operation on the first target face image