In-flight refocusing of the SPOT-1 HRV cameras

Aime Meygret; Dominique Leger

doi:10.1117/12.243225

17 June 1996 In-flight refocusing of the SPOT1 HRV cameras

Aime Meygret, Dominique Leger

Proceedings Volume 2758, Algorithms for Multispectral and Hyperspectral Imagery II; (1996) https://doi.org/10.1117/12.243225
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

A successful in-flight refocusing experiment based on image processing is described. Each of the two SPOT1 HRV cameras was refocused with respect to the other by analyzing the image spectrum taken simultaneously by both cameras. The experiment was carried out during the autumn of 1994 and its results are also presented: (1) the estimated optimal position for the rear corrective lens of the camera, (2) MTF improvement and its relative quality in the field of view in terms of homogeneity and astigmatism, (3) the validation of a theoretical geometric defocusing model that gives the changes in MTF as a function of corrective lens position. We conclude with the high accuracy of our method (2%) and its sensitivity to the spectral content of the viewed landscapes.

Citation Download Citation

Aime Meygret and Dominique Leger "In-flight refocusing of the SPOT1 HRV cameras", Proc. SPIE 2758, Algorithms for Multispectral and Hyperspectral Imagery II, (17 June 1996); https://doi.org/10.1117/12.243225

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