Importance

Loading Importance Indicators...

Abstract

A surface model may be created from aerial photographs, while mitigating the staircase effect, by interpolating sub-pixel values in the photographs and using those sub-pixel values to calculate the offset between overlapping photographs. Aerial photographs are taken, which include overlapping regions. For a pair of photographs, the photographs are rectified to create coordinate systems in which the photographs have x-axes that coincide and y-axes that are parallel to each other, so that overlapping regions in one photograph are a fixed offset along the x-axis from the other photograph. Analytic functions are used to interpolate values between pixels, and the offset distance is calculated by finding the offset that maximizes a similarity function over the analytically interpolated values. The calculated offset may then be used to calculate the height of a point on the photographed surface. A surface model may be built by calculating the heights of many points.

Loading the Abstract Image...

First Claim