Accuracy computation

[nboyd]

Hi,

It seems to me that the line
pred[w,h,int(label[w,h,1,n])+1,n] >= maximum(pred[w, h, 1:channels, n])
contains a potential bug if the prediction scores are, for instance, identically zero.

Note that this is very unlikely to happen after training starts, but it might be nice to fix just in case.

It might be better to compute an argmax of pred and then check that it is equal to the correct label.

-Nick

[pluskid]

@nboyd Thanks for reporting this! For the case of all-zero, or all the predictions are equal or some predictions are equal to the true prediction, then my original code will compute an over optimistic accuracy. However, that happens rarely and that case has intrinsic ambiguity -- now it will depends on how indmax is defined when given an array with non-unique elements. But anyway, I just fixed this. Thanks again for reporting and opening the first issue! :D