Identifying Typical Satoyama Coppice Trees by Analyzing Seasonal Color Change on Aerial Photographs

Identifying Landforms and Soils by Aerial Photographs

In the process of analyzing aerial photographs to obtain information on the engineering characteristics of soils, the first and perhaps the most important step is to identify the landform. The landform may consist of hills, valleys, plains, terraces, beaches, dunes, and other topo­ graphic features largely created by the forces of erosion. The im­ portance of the landform lies in its relation t...

Color Restoration of Aerial Photographs

Segmentation of Color Aerial Photographs Using HSV Color Models

Color aprial plioto~rapl~s I~ave beer1 witlely used Tor grwping most ~bptlatcrE land uses. As IIle firs: step towards t , l ~ r ! aul.omat,ic exlraction of sucl~ Features FIB roatls, Iiot~scs, etc. from color aerial photograplis, we report on tlre cvaluat.ion of several color nlorlels used ror region segmentmalion. We first transrormed the RGB color imagm into an IlSV space ljy wing one of seve...

investigation on poplar cultivated area change by aerial photographs and land control

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Optimizing templates for finding trees in aerial photographs

Positions of individual trees in high-resolution aerial photographs are estimated by use of templates derived from an optical tree crown model and the geometry at image acquisition. The template is bounded by an ellipse, for which we ®nd the optimal size, eccentricity and translation along one axis. Tree top positions are estimated as local maxima of the correlation function for the successivel...