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LIMITATIONS OF RESOLVING POWER AS A MEASURE OF IMAGE QUALITY IN AERIAL PHOTOGRAPHY
Author(s) -
Brock G. C.
Publication year - 1968
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/j.1477-9730.1968.tb00911.x
Subject(s) - aerial photography , optical transfer function , photography , scale (ratio) , contrast (vision) , measure (data warehouse) , remote sensing , computer science , power (physics) , computer vision , image quality , artificial intelligence , optics , image (mathematics) , physics , geography , art , cartography , data mining , quantum mechanics , visual arts
Photography of models and modulation transfer function analysis have been used to investigate the common belief that in aerial photography large‐scale images are preferable to small‐scale images, even when the resolving power in terms of ground dimensions is the same. The belief was found to be justified for two extreme cases representing, respectively, a small scale, mainly grain‐limited system, and a large scale, wholly lens‐limited system, for which the ground resolutions were equal on three‐bar targets of 3 to 1 contrast (modulation 0–5). Resolving power tests would have been misleading for these two systems even at a target contrast of less than 2 to 1 (modulation less than 0–3).