Building in debug or release, x64, in vs2010, registerPageLocked and unregisterPageLocked are not being exported. Believe issue is missing namespace specifier in function definition. Changing

<pre><code class="cpp">
void registerPageLocked(Mat& m)
{
cudaSafeCall( cudaHostRegister(m.ptr(), m.step * m.rows, cudaHostRegisterPortable) );
}

void unregisterPageLocked(Mat& m)
{
cudaSafeCall( cudaHostUnregister(m.ptr()) );
}
</code></pre>

to

<pre><code class="cpp">
void cv::gpu::registerPageLocked(Mat& m)
{
cudaSafeCall( cudaHostRegister(m.ptr(), m.step * m.rows, cudaHostRegisterPortable) );
}

void cv::gpu::unregisterPageLocked(Mat& m)
{
cudaSafeCall( cudaHostUnregister(m.ptr()) );
}
</code></pre>

solved this issue for me.