Techniques And Applications Of Nonlinear Processing With Halftones

T. C. Strand

doi:10.1117/12.954907

12 January 1977 Techniques And Applications Of Nonlinear Processing With Halftones

T. C. Strand

Proceedings Volume 0083, Optical Information Processing: Real Time Devices & Novel Techniques; (1977) https://doi.org/10.1117/12.954907
Event: 20th Annual Technical Symposium, 1976, San Diego, United States

Abstract

Optical analog systems which are capable of doing nonlinear processing have potential application in several areas including equidensitometry and analog-to-digital conversion. One approach to nonlinear optical processing is derived from the idea of halftone printing. This approach to nonlinear processing requires custommade halftone screens. It is important to be able to produce such screens accurately and reproducibly. This paper describes a technique of making a binary-coded halftone screen. The desired continuous-tone screen is obtained as an aerial image by spatial filtering the binary mask. Techniques of microlithography have been advanced to such a state that it is possible to produce binary masks which cannot be adequately imaged by lenses. This paper discusses a method of circumventing this limitation. This is done by a means of self-imaging which incorporates the equivalent of low-pass spatial filtering.

Citation Download Citation

T. C. Strand "Techniques And Applications Of Nonlinear Processing With Halftones", Proc. SPIE 0083, Optical Information Processing: Real Time Devices & Novel Techniques, (12 January 1977); https://doi.org/10.1117/12.954907

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