Computer-generated hologram of actual objects from arbitrary viewpoints with range sensors and digital cameras

Keigo Tai; Tsubasa Ichikawa; Yuji Sakamoto

doi:10.1117/12.2038940

27 February 2014 Computer-generated hologram of actual objects from arbitrary viewpoints with range sensors and digital cameras

Keigo Tai, Tsubasa Ichikawa, Yuji Sakamoto

Author Affiliations +

Proceedings Volume 9006, Practical Holography XXVIII: Materials and Applications; 90060S (2014) https://doi.org/10.1117/12.2038940
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

In computer-generated holograms (CGHs), various methods to generate holograms of actual objects have been proposed. One method uses the 3D information of actual objects obtained by one range sensor to generate a hologram. However, this method is unable to express occlusion because the 3D information is measured from only one viewpoint. Therefor, re-capturing 3D information is necessary to make CGHs from another viewpoint in this method. To overcome these problems, we have proposed a method that generates models of actual objects in a computer using two or more range sensors. In this method, CGHs are calculated by using multi-view images (MVIs) rendered from object models, which enables the occlusion to be expressed correctly. However, determination brightness values is unable to be performed on the whole object model because the luminance images are insufficient. This makes it difficult to generate CGHs from arbitrary viewpoints at one time. In this paper, we propose a method using additional digital cameras with range sensors to generate CGHs of actual objects from arbitrary viewpoints. This method determines the brightness values of the whole model using pictures taken by the additional cameras. The proposed method is advantageous in that re-capturing 3D information is unnecessary when CGHs are generated from another viewpoint. This method calculates CGHs with MVIs rendered from the model having brightness values. Results of computer simulations and optical reconstruction showed that it was possible to generate CGHs of actual objects with occlusion from arbitrary viewpoints.

Citation Download Citation

Keigo Tai, Tsubasa Ichikawa, and Yuji Sakamoto "Computer-generated hologram of actual objects from arbitrary viewpoints with range sensors and digital cameras", Proc. SPIE 9006, Practical Holography XXVIII: Materials and Applications, 90060S (27 February 2014); https://doi.org/10.1117/12.2038940

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available