ValueError: total size of new array must be unchanged

inds=np.reshape(inds,(-1,2))
因此有效的roidb需为偶数。
参考https://github.com/rbgirshick/py-faster-rcnn/issues/61可处理数据奇偶问题

#inds=np.reshape(inds,(-1,2))
#row_perm=np.random.permutation(np.arange(inds.shape[0]))
#inds=np.reshape(inds[row_perm,:],(-1,))

#considerthecasewhenlen(inds)isodd
isodd=len(inds)%2
ifnotisodd:
inds=np.reshape(inds,(-1,2))
else:
tail=inds[-1]
inds=np.reshape(inds[:-1],(-1,2))
row_perm=np.random.permutation(np.arange(inds.shape[0]))
inds=np.reshape(inds[row_perm,:],(-1,))
ifisodd:
inds=np.append(inds,tail)
self._perm=inds