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Some puzzles on the cost volume

See original GitHub issue

for i in range(self.maxdisp/4):
            if i > 0 :
             cost[:, :refimg_fea.size()[1], i, :,i:]   = refimg_fea[:,:,:,i:]
             cost[:, refimg_fea.size()[1]:, i, :,i:] = targetimg_fea[:,:,:,:-i]
            else:
             cost[:, :refimg_fea.size()[1], i, :,:]   = refimg_fea
             cost[:, refimg_fea.size()[1]:, i, :,:]   = targetimg_fea

This piece of codes has puzzled me. I am wondering why there would be negtive numbers, if using range() ,should all the iteration be positive? Besides, I am also wondering the way to concat two feature maps. How to understand the last dimension where in code “if i > 0”, how to understand the index i: and :-i？

Issue Analytics

State:
Created 5 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

1reaction

JiaRenChangcommented, May 23, 2018

@kingsleyluoxin Hi, you may read this https://stackoverflow.com/questions/14419206/what-does-1-mean-in-python .

0reactions

JiaRenChangcommented, May 23, 2018

@kingsleyluoxin The region that we can not concatenate both left and right feature will be cut, and replace with 0.

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