Photographs Across Time: Studies in Urban Landscapes

Author(s): Mary J. Thornbush and Sylvia E. Thornbush

DOI: 10.2174/9781608059843115010007

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Quantitative Photography

Pp: 61-79 (19)

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Abstract

SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.

Abstract

A recent, and what seems like a natural evolution, of photography has been for quantification. With modern cameras that can more realistically depict what is visible, it is possible to measure change using (digital) photography. This chapter considers various examples of the application of photography in the measurements of surface colouration (soiling) and the decay of weathering forms. Techniques developed by the first author are presented, and a case study on the application of the O-IDIP method is presented to convey photographic surveys for the quantification of stone surface colouration associated with biological colonisation on a string course in central Oxford.

Keywords:

Calibration, CIE Lab, decay mapping, DMAP approach, histogrambased colour measurement, O-IDIP method, surface colouration.

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