Method, system and device for improving image feature matching accuracy and medium

According to the method for improving the image feature matching accuracy, the image cutting technology is introduced, the influence of an area with the too large or too small gradient value on feature point matching is eliminated, and the feature point matching accuracy of the area with the normal gradient value is improved; a contrast enhancement technology is also introduced, so that the feature point detection number is increased, and the feature point matching accuracy is further improved; a feature point deduplication technology is further introduced, repeated feature points are removed, the accuracy of feature point matching is improved, the technical problems that an existing image splicing and superposition technology is either simple in operation but poor in effect or good in effect but complex in operation and large in calculation amount are solved, and while simplification is achieved, the image splicing and superposition efficiency is improved. And good splicing and overlapping effects are achiev