Suppressing moiré with lateral dispersion

Bruce M Radl

doi:10.1117/12.526778

7 June 2004 Suppressing moire with lateral dispersion

Bruce M Radl

Proceedings Volume 5301, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications V; (2004) https://doi.org/10.1117/12.526778
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

Color aliasing, in its most visible and objectionable form, colored moire, persists as a drawback to digital imaging of periodic objects, particularly fabrics. Sensors with mosaic color filters typically measure only 1/3 of the color information for each pixel. With an optical modification, a single subject point can be measured by laterally displaced red, green, and blue pixels. This is done by a shift of the color planes laterally using a dispersive optical element. The element creates an optical effect similar to chromatic aberration but uniform in magnitude and direction over the image. Light from a subject point passes through the optical system but is not focused to a point in the image plane. Instead the red component is focused to a different point than the green and blue components and all are arranged in a line. This element, or filter, causes one subject point to be measured by three sensor pixels, one red, one green and one blue. This in fact may result in an image having more useful information: fewer pixels of color-registered, error free data, rather than a larger number of pixels with color errors.

Citation Download Citation

Bruce M Radl "Suppressing moire with lateral dispersion", Proc. SPIE 5301, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications V, (7 June 2004); https://doi.org/10.1117/12.526778

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