15 October 1993 Evaluation of four-color negative aerial films
Author Affiliations +
Agfa Aviphot Color N200, Agfa Aviphot Color H100, Kodak Aerocolor Negative 2445, and Kodak RAS 686 were subjected to aerial and laboratory testing. The films were exposed at scales of 1:40,000, 1:20,000, and 1:5,000. A number of ground targets common to the four films were identified and measured densitometrically. The densitometric readings were converted to Munsell Color System designations to provide a comparative reference for color and saturation differences. Hue shifts of 5% (1:20,000) to 19% (1:5,000) were encountered between films. Color saturation levels were noted to be higher with the Agfa H100 film. Sensitometric tests using normal, one push, and two push processing were also performed to evaluate average gradients, film speeds, and color bias for the four films. Characteristic curve symmetry was most adversely affected by push processing the Kodak Aerocolor 2445 film and least adversely affected by pushing the Kodak RAS 686 film. EAFS values consistently increased with the Agfa emulsions but remained stable or decreased with the Kodak emulsions during push processing. Color bias generally tended to the red with the C-41 type films and blue-magenta with the Kodak 2445 film. Resolution characteristics were analyzed by photographing a bar ground target at the 1:5,000 scale. Best resolution performance (normal processing) was noted with the Agfa N200 and Kodak RAS 686 films.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Livio Fent, Livio Fent, Jan M. Brouwer, Jan M. Brouwer, "Evaluation of four-color negative aerial films", Proc. SPIE 1943, State-of-the-Art Mapping, (15 October 1993); doi: 10.1117/12.157144; https://doi.org/10.1117/12.157144


Why Quality Control?
Proceedings of SPIE (March 24 1976)
Generic criteria for vibration-sensitive equipment
Proceedings of SPIE (January 31 1992)
Memory preservation made prestigious but easy
Proceedings of SPIE (January 25 2011)
Resolution for color photography
Proceedings of SPIE (February 09 2006)
Graphic arts standards update: 1996
Proceedings of SPIE (March 28 1996)
Mobile phone color holography
Proceedings of SPIE (February 10 2010)

Back to Top