Brightness of Fine Detail in Ground Photography
- 1 June 1959
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 49 (6) , 629-634
- https://doi.org/10.1364/josa.49.000629
Abstract
For a number of typical outdoor photographic scenes on cloudless days, a statistical study has been made of logarithmic brightnesses and of differences of log brightnesses on adjacent pieces of fine detail, as they would be seen by a representative camera. Values were obtained photographically on Super XX film and also by means of a photoelectric telephotometer corrected to Super XX spectral response. The results do not disagree seriously with accepted values for the photographic brightness range. However the uncertainty in the meaning of “brightness range” is illustrated and a definition is proposed for a “99% range.” For difference of log brightness on fine detail, low values are found to predominate, with two-thirds of the differences below the average value of 0.15.Keywords
This publication has 4 references indexed in Scilit:
- The Photometric Range of Outdoor ScenesJournal of the Society of Motion Picture and Television Engineers, 1954
- Measurements of Sky Luminance Distribution at StockholmJournal of the Optical Society of America, 1954
- Brightnesses of Fine Detail in Air Photography*Journal of the Optical Society of America, 1951
- A Photoelectric Method of Measuring the Atmospheric Attenuation of Brightness Contrast Along a Horizontal Path for the Visible Region of the Spectrum*Journal of the Optical Society of America, 1949