Shadows exist in almost all aerial and outdoor images, and they can be useful for estimating Sun position estimation or measuring object size. On the other hand, they represent a problem in processes such as object ...

A technique to automatically locate Ground Control Points (GCPs) in large aerial images is presented considering the availability of low accuracy direct georeferencing data. The approach is based on image chips of GCPs ...

A integração de plataformas aéreas e terrestres representa uma solução promissora para diversas aplicações de mapeamento, como projetos rodoviários e ferroviários. Estes sistemas possuem características complementares que ...

This paper presents an automatic workflow for measuring natural ground control points (GCPs) in aerial images. The approach is based on the acquisition of multi-scale fisheye vertical terrestrial images over distinguishable ...

This paper presents an experimental assessment of photogrammetric targets and subpixel location techniques to be used with low contrast images such as images acquired by hyperspectral frame cameras. Eight different target ...

The advent of digital cameras heralded many possibilities of structure and shape recovery from imagery that are quickly and inexpensively acquired by such devices. Throughout the years numerous techniques have emerged, and ...

The objective of the proposed approach is to locate and measure ground control points in aerial images when large image search spaces are defined due to the use of inaccurate initial exterior orientation parameters, such ...