AUTOMATED GEOSPATIAL IMAGE MOSAIC GENERATION WITH MULTIPLE ZOOM LEVEL SUPPORT

摘要

Generation of a plurality of orthomosaic image layers for a geographical area, wherein the layers comprise different spatial resolutions and are radiometrically normalized to facilitate improved radiometric consistency when zooming relative to the geographic area. In applications that facilitate zooming with respect to a geographic area imaged by the orthomosaic layers, radiometric normalization of the orthomosaic image layers may reduce radiometric discontinuities when zooming in, zooming out, and/or panning a displayed portion that is output to the user. The orthomosaic layers may be generated based on one or more orthomosaic image layer or may be developed independently using a source images. In any regard, the radiometric normalization may include generating a normalization function based on image metadata that is calculated and may be independent of the spatial resolution of the image.

主权项

1. A method for radiometric normalization of a plurality of mosaic image layers having different spatial resolutions, comprising:
first calculating first image metadata for at least a first image portion of a first mosaic image layer having a first spatial resolution, wherein the first image metadata is independent of the first spatial resolution;second calculating second image metadata for at least a second image portion of a second mosaic image layer having a second spatial resolution different than the first spatial resolution, wherein the second image data is independent of the second spatial resolution;
determining a normalization function based on a comparison of the first image metadata for the first image layer and the second image metadata for the second image layer; applying the normalization function to the second image layer to normalize at least a portion of the second image layer relative to the first image layer.