for h{
   for w{
         for i in range 3{
             for j in range 3{
                 new_tensor(i,j) = m_tensor(h+i,w+j)
             }
         }
         out = sess->run(out_node, in:new_tensor)
         m_tensor(h,w) = out.xxx
   }
}

std::copy_n(vec.begin(), vec.size(), input.flat<float>().data())

std::memcpy(input.flat<float>().data(), vec.data(), input.NumElements() * sizeof(float))

for i in range 3{
             for j in range 3{
                 new_tensor(i,j) = m_tensor(h+i,w+j)
             }
         }