Recently, a very efficient mask-based technique for CGH, called the switch-back technique, has been proposed to perform silhouette light-shielding efficiently. In this algorithm, the fields behind polygons are shielded by binary mask patterns, called silhouette masks, which are generated by orthogonal projection of the polygon shape. Thus, the mask plane is parallel to the hologram but not parallel to the polygon. As a result, there are many small gaps between neighboring masks. Background fields that should be shielded by the masks sometimes leak out from the gaps. Viewers perceive the gaps as many cracks in the surfaces of the reconstructed object. To get over the problem, exacter algorithm than silhouette lightshielding, called surface light-shielding, has been proposed using rotational transform of wave-fields, but it was too timeconsuming to apply it for large-scale CGHs. In this report, we propose a novel occlusion processing technique using improved surface light-shielding to calculate large-scale CGHs without any cracks. Actual large-scale CGHs are demonstrated to confirm validity of the algorithm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.