Multi-stereoscopic-image fusion drawing method considering different illumination imaging conditions

Abstract

The invention relates to a multi-stereoscopic-image fusion drawing method considering different illumination imaging conditions. The method comprises the following steps: step one, acquiring an existing image of a research area and selecting a multi-coverage stereo image pair; step two, constructing an imaging geometric model of a remote sensing image; step three, carrying out initial matching onthe stereo image pair to obtain same-name points; step four, carrying out stereoscopic image area network beam method adjustment on the imaging geometric model obtained at the step two to obtain a refined imaging geometric model; step five, carrying out dense matching on each group of stereoscopic image pairs to obtain an image-space dense same-name point set of all groups of stereoscopic image pairs; step six, on the basis of the refined imaging geometric model obtained at the step four, carrying out forward intersection on the image-space dense same-name points obtained by the step five to obtain a dense three-dimensional point cloud of the object space, carrying out grid division and interpolation to obtain a DEM, and carrying out DEM fusion to obtain a hole-free DEM; and step seven, according to the hole-free DEM and the refined imaging geometric model, a DOM being an image with geographic information after terrain correction is obtained.

Description

technical field [0001] The invention relates to a multi-stereo image fusion drawing method considering different illumination and imaging conditions, and relates to the technical field of stereo photogrammetry in photogrammetry. Background technique [0002] Remote sensing mapping of the surface of planets (Moon, Mars) is a basic task in planetary exploration missions. It provides a geographic reference basis for planetary scientific exploration mission planning and scientific research, and is a basic means of obtaining planetary morphology and structure information. The current planetary orbiter remote sensing image mapping of the same area is mostly based on a pair of stereo images to produce high-precision topographic map products of the area. However, the information provided by a single stereoscopic image is often limited due to the influence of observation angles and lighting conditions, especially in some areas where the surface terrain has large fluctuations, shadows...

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Problems solved by technology

Because planetary orbits are different from the sun-synchronous orbits usually used by earth observation satellites, it is often impossible to guara...

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