US 2009/0154793 A1 · DIGITAL PHOTOGRAMMETRIC METHOD AND APPARATUS USING INTERGRATED MODELING OF DIFFERENT TYPES OF SENSORS

Abstract

Disclosed is a digital photogrammetric method and apparatus using the integrated modeling of different types of sensors. A unified triangulation method is provided for an overlapping area between an aerial image and a satellite image that are captured by a frame camera and a line camera equipped with different types of sensors. Ground control lines or ground control surfaces are used as ground control features used for the triangulation. A few ground control points may be used together with the ground control surface in order to further improve the three-dimensional position. The ground control line and the ground control surface may be extracted from LiDAR data. In addition, triangulation may be performed by bundle adjustment in the units of blocks each having several aerial images and satellite images. When an orthophoto is needed, it is possible to generate the orthophoto by appropriately using elevation models with various accuracies that are created by a LiDAR system, according to desired accuracy.

Claims15

Dependent claims

A digital photogrammetric method comprising:

extracting ground control features indicating ground objects to be used to determine the spatial positions of the ground objects from geographic information data including information on the spatial positions of the ground objects;
specifying image control features corresponding to the extracted ground control features, in space images captured by cameras having completely or partially different camera parameters with each other;
establishing constraint equations from the geometric relationship between the ground control features and the image control features in an overlapping area between the space images;
and
calculating exterior orientation parameters of each of the space images using the constraint equations, and applying the exterior orientation parameters to the space images to determine the spatial positions of the ground objects.

2 more elements

A digital photogrammetric apparatus comprising:

a control feature setting unit that extracts, from geographic information data including information on the spatial positions of the ground objects, ground control lines or ground control surfaces that respectively indicate linear ground objects or planar ground objects to be used to determine the spatial positions of the ground objects, and specifies image control lines or image control surfaces that respectively correspond to the extracted ground control lines or the extracted ground control surfaces, in space images including aerial images captured by a frame camera and satellite images captured by a line camera;
and
a spatial position measuring unit that groups the space images into blocks, establishes constraint equations from the geometric relationship between the ground control lines and the image control lines or the geometric relationship between the ground control surfaces and the image control surfaces, in the space images, and performs bundle adjustment on the constraint equations to determine exterior orientation parameters of each of the space images and the spatial positions of the ground objects.

Dependencies are inferred from the claim text.

Digital photogrammetric method and apparatus using intergrated modeling of different types of sensors

Life of this patent

Digital photogrammetric method and apparatus using intergrated modeling of different types of sensors

Life of this patent

Abstract

Claims15