hdr
代码说明：
hdr图片合成，四幅不同曝光的图片合成一张hdr图片(HDR picture synthesis, four pictures of different exposures synthesize an HDR picture)
文件列表：
house, 0 , 2007-08-23
house\A.jpg, 128392 , 2007-05-06
house\B.jpg, 230903 , 2007-05-06
house\C.jpg, 265826 , 2007-05-06
house\D.jpg, 167969 , 2007-05-06
house\readme.txt, 29 , 2007-08-23
display_pyramid.m, 607 , 2007-08-23
downsample.m, 657 , 2007-08-23
example.m, 307 , 2007-08-24
exposure_fusion.m, 2689 , 2007-08-23
gaussian_pyramid.m, 573 , 2007-08-24
laplacian_pyramid.m, 1083 , 2007-08-24
load_images.m, 1280 , 2007-08-23
pyramid_filter.m, 259 , 2007-08-23
reconstruct_laplacian_pyramid.m, 702 , 2007-08-23
upsample.m, 877 , 2007-08-23
readme.txt, 748 , 2007-08-24
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