rename the database names in or_mnist.cpp #3040
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The files from http://yann.lecun.com/exdb/mnist/ are
train-images-idx3-ubyte.gz
train-labels-idx1-ubyte.gz
t10k-images-idx3-ubyte.gz
t10k-labels-idx1-ubyte.gz
after unpacking, ther default names are like xxxx-idxn-ubyte
but the names in the code are
train-images.idx3-ubyte
train-labels.idx1-ubyte
t10k-images.idx3-ubyte
t10k-labels.idx1-ubyte
'-' is replaced by '.' , this cause a segmentation fault when do as the instructions in dataset.hpp:
./opencv/build/bin/example_datasets_or_mnist -p=/home/user/path_to_unpacked_files/