IBM Journal of Research and Development
IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
Journal of Research
and Development
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Search/Index  
    Orders  
    Description  
    Patents  
    Recent publications  
    Author's Guide  
  Staff  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 9, Number 2, Page 100 (1965)
Nontopical Issue
  Full article: arrowPDF   arrowCopyright info





   

Coincidence Counter Models with Applications to Photographic Detection Theory

by H. J. Zweig, D. P. Gaver
Various types of counter models have been treated in the literature over the past twenty years. In all these models the counter mechanism involves a fixed or random dead time following a registered event. In this paper a different type of counter mechanism is introduced in which the occurrence of two or more input events within a relatively short time is required to produce a registered (output) event. This model of an "R-fold coincidence counter" is applied to the development of grains in a photographic emulsion for both low-intensity and high-intensity reciprocity failure.
Related Subjects: Counters; Photography