参考数据集INRIA Holidays dataset
很贴心，MATLAB访问代码：
% This function reads a siftgeo binary file
%
% Usage: [v, meta] = siftgeo_read (filename, maxdes)
% filename the input filename
% maxdes maximum number of descriptors to be loaded
% (default=unlimited)
%
% Returned values
% v the sift descriptors (1 descriptor per line)
% meta meta data for each descriptor, i.e., per line:
% x, y, scale, angle, mi11, mi12, mi21, mi22, cornerness
function [v, meta] = siftgeo_read (filename, maxdes)
if nargin < 2
m原文地址：https://blog.csdn.net/superdont/article/details/136016467
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