OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 47, Iss. 4 — Apr. 1, 1957
  • pp: 312–318

Photographic Granularity and Graininess. IX. Techniques and Equipment for the Objective Measurement of Graininess

L. A. JONES, G. C. HIGGINS, K. F. STULTZ, and H. F. HOESTEREY  »View Author Affiliations


JOSA, Vol. 47, Issue 4, pp. 312-318 (1957)
http://dx.doi.org/10.1364/JOSA.47.000312


View Full Text Article

Acrobat PDF (1300 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A photoelectric scanning instrument is described which gives granularity values in terms that can be converted into the graininess values that would be obtained by an observer viewing a magnified image of the sample under standard conditions. The procedure is to determine the critical scanning aperture that results in a signal corresponding to the threshold-gradient sensitivity of the eye for the density of the sample. The techniques for making two types of routine graininess measurements are described in detail. Class I measurements give the graininess of samples at a density of 0.8. Class II measurements give granularity numbers that indicate the relative graininess to be expected of matched prints made from the negatives.

Citation
L. A. JONES, G. C. HIGGINS, K. F. STULTZ, and H. F. HOESTEREY, "Photographic Granularity and Graininess. IX. Techniques and Equipment for the Objective Measurement of Graininess," J. Opt. Soc. Am. 47, 312-318 (1957)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-47-4-312

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited