Restoration of images captured by a staggered TDI camera in the presence of mechanical vibrations

Gadi Hochman; Yitzhak Yitzhaky; Norman S. Kopeika; Yair Z. Lauber; Meira Citroen; Adrian Stern

doi:10.1117/12.506715

19 November 2003 Restoration of images captured by a staggered TDI camera in the presence of mechanical vibrations

Gadi Hochman, Yitzhak Yitzhaky, Norman S. Kopeika, Yair Z. Lauber, Meira Citroen, Adrian Stern

Proceedings Volume 5203, Applications of Digital Image Processing XXVI; (2003) https://doi.org/10.1117/12.506715
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Time Delay and Integration (TDI) sensors scan the image in one dimensions using a rectangular sensor array that integrates multiple time-delayed exposures of the same object. Due to physical constraints the TDI sensor element may have a staggered structure, in which the odd and the even sensors are horizontally separated. TDI image acquisition systems are usually employed in low signal to noise situations such as low light conditions or thermal imaging, or when high-speed readout is required. This work deals with analysis and restoration of images acquired by thermal staggered TDI sensors in the presence of mechanical vibrations. Vibrations during such an image acquisition process cause space variant image distortions in the scanning direction. These distortions include geometric warps (such as interlace comb effects) and blur. This situation is different from common case where the image degradation caused by motion is modeled as space invariant and can be treated by de-convolution techniques. The relative motion at each location in the degraded image is identified from the image using a differential technique. This information is then used to reconstruct the image using projection onto convex stes (POCS) technique. A main novelty in this work is the implementation of such methods to scanned images (column-wise). Restorations are performed with simulated images and with real mechanically degraded thermal images.

Citation Download Citation

Gadi Hochman, Yitzhak Yitzhaky, Norman S. Kopeika, Yair Z. Lauber, Meira Citroen, and Adrian Stern "Restoration of images captured by a staggered TDI camera in the presence of mechanical vibrations", Proc. SPIE 5203, Applications of Digital Image Processing XXVI, (19 November 2003); https://doi.org/10.1117/12.506715

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