Experimental hologram reconstruction when the triplicator hologram ${\phi }_h\left(\mathbf{x}\right)$ is summed with the original phase function $\varphi \left(\mathbf{x}\right).$ (a, b) Result for the flower pattern with added random noise for (a) ${\phi }_h\left(\mathbf{x}\right)+\varphi \left(\mathbf{x}\right)$ and (b) ${\phi }_h\left(\mathbf{x}\right)-\varphi \left(\mathbf{x}\right)$. (c, d) Result for the circle pattern and ${\phi }_h\left(\mathbf{x}\right)+\varphi \left(\mathbf{x}\right)$ when (c) no random noise is added and (d) a random noise is added to the circle before calculating the hologram.