Building shielding detection and shielding area compensation method by use of ghost images

A technology of occlusion area and occlusion detection, applied in the field of aerial photogrammetry and real shot image generation, which can solve the problems of intractable, false occlusion buildings, etc.

Active Publication Date: 2016-12-21
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0007] The present invention proposes a method for occlusion detection using ghost images to solve the problems

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  • Building shielding detection and shielding area compensation method by use of ghost images
  • Building shielding detection and shielding area compensation method by use of ghost images
  • Building shielding detection and shielding area compensation method by use of ghost images

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Embodiment Construction

[0033] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments performed by persons of ordinary skill in the art on the condition that no creative work is performed shall fall within the scope of protection of the present invention.

[0034] Example:

[0035] In this embodiment, we select an aerial image of a foreign region for occlusion detection processing. The aerial image was taken by RC30 aerial camera, and the adjacent images covering the central city area are dv1119 and dv1120, which have a heading overlap of 65%. The buildings in the image are complex and diverse, causing a lot of occlusion.

[0036] In specific implementation, the technical scheme of the ...

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Abstract

The invention discloses a building shielding detection and shielding area compensation method by use of ghost images. The method comprises the following steps: 1, performing secondary utilization on a result (ghost images) of conventional ortho-rectification; 2, performing shielding compensation by use of such a feature that ghost images are not geometrically deformed; and 3, performing shielding detection completely on buildings in aerial images, detecting ghost roofs (roofs obtained through the ortho-rectification) of the buildings in the ghost images and projection roofs by use of DBM, and by use of relations between the ghost images and shielding areas, determining that pixel areas occupied besides the roof portions of the buildings in the ghost images are the shielding areas. According to the invention, shielding detection is carried out by use of the method, and he problems of fake shielding and fake visibility existing in a conventional shielding detection method are eliminated. In the detection process, the building roofs in the whole images are firstly extracted, then gray processing is performed on the shielding areas, and the problem of coverage of the shielding areas when a part of the building roofs are re-detected after detection is avoided. The operation is simple, the shielding detection speed is improved, and the detection cost is decreased.

Description

technical field [0001] The present invention relates to the field of aerial photogrammetry, in particular to the technology and method in the field of real orthophoto generation, which is to deepen the use of traditional orthorectification results, so that ghost images can achieve the effect of real orthophotos. Background technique [0002] The ghost image described is: in the process of digital differential correction of aerial images using traditional ortho-rectification methods, since the building walls do not have a digital ground model, there are roof ghosts in the image generated by ortho-rectification phenomenon, such incomplete orthophotos are called ghost images; the roofs of buildings produced through traditional orthocorrection in ghost images are called ghost roofs. [0003] Urban digital orthophoto maps have the advantages of high precision, rich information, intuitive and realistic, and can be used as background information for building digital cities. It pro...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/10004
Inventor 周国清王月峰
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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