QUALITY CATEGORIZATION OF AERIAL RECONNAISSANCE PHOTOGRAPHY
Abstract
The derivation of a summary measure which would relate measurable photographic parameters to the information content which a photointerpreter could extract from the photograph was investigated. Four parameters of quality were chosen which describe image contrast, grain, and modulation curve (resolution and passband). Image modification methods and measuring techniques which could be used without recourse to test charts were developed for black and white photographs. A thousand photographs with a range of quality parameters were generated and used in interpretation tests. Standard statistical methods were employed in an attempt to obtain the correlation between the photointerprete scores and the measured variables of the photographs. However, these procedures did not permit a meaningful summary measure to be derived, primarily because of the low scores achieved by the photointerpreters who took the test. Conclusions have been drawn relating to image modification, measurement of quality parameters and planning of future tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1963
- Accession Number
- AD0420923
Entities
People
- Harry B. Hammill
- Paul G. Roetling
- Thomasm. Holladay
Organizations
- Calspan