Mr. Lizhi Wang Profile

Lizhi Wang

at Xidian Univ

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 31 October 2014 Paper

A flexible design for coded aperture snapshot spectral imager

Lizhi Wang, Huan Li, Dahua Gao, Chao Li, Danhua Liu, Guangming Shi

Proceedings Volume 9273, 92732K (2014) https://doi.org/10.1117/12.2071420

KEYWORDS: Sensors, Coded apertures, Imaging systems, Binary data, Data modeling, Prisms, Imaging spectroscopy, Superposition, Optical components, 3D metrology

Read Abstract +

By the success of compressive sensing (CS), coded aperture snapshot spectral imager (CASSI) computationally obtains 3D spectral images from 2D compressive measurement. In CASSI, each pixel of the detector captures spectral information only from one voxel in each band with binary weights (i.e., 0 or 1), which limits the variety of superposition relationship among the 3D voxels in the underlying scene. Moreover, the correspondence of each pixel of detector to each pixel of coded aperture cannot be readily achieved in the presence of dispersive prism, due to the small pixel sizes of these elements (often in micrometer). In this paper, we propose a flexible design to improve the performance of CASSI with currently employed optical elements in CASSI. Specifically, the proposed design integrates a kind of flexible alignment relationship along the coded aperture, the dispersive prism and the detector. Each measurement of the detector is manifested as the summation of several voxels in each band with random decimal weights and different measurements corresponds to overlapped voxels, which provides more sufficient superposition relationship of the scene information. This flexible design favors the sensing mechanism better satisfy the requirement of CS theory. Furthermore, the proposed design greatly reduces the alignment complexity and burden of system construction. Preliminary result achieves improved image quality, including higher PSNR and better perceptual effect, compared to the traditional design.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

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.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years