Image Processing Reference
In-Depth Information
Fig. 5.3 Comparison of urban objects and land uses in Enschede, The Netherlands, by sensor and
spatial resolution (each window represents a 400 × 400 m area on the ground)
However, due to several factors, the required spatial resolution is not sufficient to
detect urban objects. First, the radiation measured for one pixel is affected by the
radiation of its neighboring pixels (scattering), causing a “blurring” effect that
complicates land cover classification (Baudot 2001 ). Second, an object can only be
positively identified if it is represented by several pixels. If accurate measurements
of an object's spatial properties are required, this must also be considered when
selecting an appropriate spatial resolution (Laurini and Thompson 1996 ).
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