Detection Of Bars And Discs In Quantum Noise

A. E. Burgess; K. Humphrey; R. F. Wagner

doi:10.1117/12.957121

6 July 1979 Detection Of Bars And Discs In Quantum Noise

A. E. Burgess, K. Humphrey, R. F. Wagner

Proceedings Volume 0173, Application of Optical Instrumentation in Medicine VII; (1979) https://doi.org/10.1117/12.957121
Event: Application of Optical Instrumentation in Medicine VII, 1979, Toronto, Canada

Abstract

We present preliminary results for threshold detection of sharp-edged and "fuzzy" bars and discs superimposed on noiseless and noisy backgrounds. The luminance profiles for the "fuzzy" targets were approximately gaussian. The background quantum noise is optical density fluctuation in nominally uniformly exposed radiographs. The measurements were done using the method of adjustment. Our results for sharp-edged targets agreed with previously published work. Our "fuzzy" target results are novel and demonstrate minima in the contrast-target size curve. The minima were near S to 10 milliradians diameter for discs and 2 to 4 milli-radians width for bars. The increasing threshold slope for large targets suggests a gradient detection process.

Citation Download Citation

A. E. Burgess, K. Humphrey, and R. F. Wagner "Detection Of Bars And Discs In Quantum Noise", Proc. SPIE 0173, Application of Optical Instrumentation in Medicine VII, (6 July 1979); https://doi.org/10.1117/12.957121

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