采用Gist算法提取图像特征，采用欧式距离进行相似度计算，返回相似性图像。完整的GUI界面，完整的图像库 注意；根据需要调整图像根目录。(Gist algorithm is used to extract image features, and Euclidean distance is used for similarity computation, and the similarity image is returned. Complete GUI interface, complete