Abstract
Past research has demonstrated that digital Fresnel holograms can be
binarized in a non-iterative manner by downsampling the source image with a grid
lattice prior to the hologram generation process. The reconstructed image of a
hologram that is binarized with this approach is superior in quality compared with
that obtained with direct thresholding, half-toning, and error diffusion. Despite
the success, the downsampling mechanism results in a prominent texture of regularly
spaced voids in the shaded regions. To alleviate this problem, an enhanced
non-iterative method for the generation of binary Fresnel holograms is presented.
Our method is based on a multi-direction line-sampling formed by a combined grid and
cross lattice, which is capable of preserving a more solid texture in the shaded
regions and enhancing the visual quality of the reconstructed image. Computer
simulations and optical reconstructions are shown to demonstrate the effectiveness
of our proposed technique.
© 2011 Chinese Optics Letters
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription