vgg_example_scene.m

实现了几何多视的功能

function [view, Xi, X, Li, L] = vgg_example_scene(N)
% VGG_EXAMPLE_SCENE - 
%
%	[view, Xi, X, Li, L] = vgg_example_scene
%
%	view - Struct array with fields:
%               I - Grayscale image (uint8)
%               x - 2xK list of 2d point matches [x;y]
%               l - 4xN list of 2d line segments [x0;y0;x1;y1]
%               P - 3x4 camera projection matrix
%       Xi - 4x737 List of point matches. Xi(j,i)=n if the j'th view has
%               the i'th 3D	point X(:,i) as its n'th 2D point.
%	X - 3x737 Recovered 3D points