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Technical Note: Pseudo natural colour aerial imagery for urban and suburban mapping

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Abstract:

Due to their near‐infrared data channel, digital airborne four‐channel imagers provide a potentially good discrimination between vegetation and human‐made materials, which is very useful in automated mapping. Due to their red, green and blue data channels, they also provide natural colour images, which are very useful in traditional (manual) mapping. In this paper, an algorithm is described which provides an approximation to the spectral capabilities of the four‐channel imagers by using a colour‐infrared aerial photo as input. The algorithm is tailored to urban/suburban surroundings, where the quality of the generated (pseudo) natural colour images are fully acceptable for manual mapping. This brings the combined availability of near‐infrared and (pseudo) natural colours within reach for mapping projects based on traditional photogrammetry, which is valuable since traditional analytical cameras still by far outnumber the relatively new family of digital airborne four‐channel imagers.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01431160500057020

Affiliations: Danish National Space Center, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark

Publication date: June 20, 2005

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