Quantization-based face comparison method, device, equipment and medium

The invention provides a face comparison method and device based on quantization, equipment and a medium, and the method comprises the steps: carrying out the statistics of a maximum value and a minimum value according to all face feature vectors in a database, and determining a quantized floating point interval; setting a fixed point interval, and setting a quantization formula; quantifying the face feature vector in the database according to the fixed point interval and a quantification formula to obtain a local fixed point vector; quantizing the to-be-recognized face feature vector according to the fixed point interval and a quantization formula to obtain a to-be-recognized fixed point vector; performing similarity comparison on the to-be-identified fixed-point vector and the local fixed-point vectors to obtain a set number of local fixed-point vectors with the similarity from large to small; obtaining a corresponding face feature vector from a database according to the obtained set number of local fixed-p