Title: Users’ Assessment of Orthoimage Photometric Quality for Visual Interpretation of Agricultural Fields
Authors: TARKO AGNIESZKA JÓZEFADE BRUIN SytzeFASBENDER DOMINIQUEDEVOS WimBREGT Arnold
Citation: REMOTE SENSING vol. 7 no. 4 p. 4919-4936
Publisher: MDPI AG
Publication Year: 2015
JRC N°: JRC93752
ISSN: 2072-4292
URI: http://www.mdpi.com/2072-4292/7/4/4919/pdf
http://publications.jrc.ec.europa.eu/repository/handle/JRC93752
DOI: 10.3390/rs70404919
Type: Articles in periodicals and books
Abstract: Land cover identification and area quantification are key aspects of implementing the European Common Agriculture Policy. Rightfulness of support provided to farmers is monitored using the Land Parcel Identification System (LPIS), with land cover identification performed by photointerpretation. While the geometric orthoimage quality required for correct photointerpretation is well understood, little is known about the photometric quality needed for LPIS applications. This paper analyzes the orthoimage quality characteristics chosen by authors as being most suitable for visual identification of agricultural fields. We designed a survey to assess users’ preferred brightness and contrast ranges for orthoimages used for LPIS purposes. Survey questions also tested the influence of a background color on the preferred orthoimage brightness and contrast, the preferred orthoimage format and color composite, assessments of orthoimages with shadowed areas, appreciation of image enhancements and, finally, consistency of individuals’ preferred brightness and contrast settings across multiple sample images. We find that image appreciation is stable at the individual level, but preferences do vary across respondents. We therefore recommend that LPIS operators be enabled to personalize photometric settings, such as brightness and contrast values, and to choose the displayed band combination from at least four spectral bands.
JRC Directorate:Sustainable Resources

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