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Straight line matching method based on affine projection matrix model

A technique of affine projection matrix and matching method, which is applied in the field of straight line matching for realizing three-dimensional reconstruction of images, and can solve the problems of information contrast in the neighborhood of the line segment to be matched, decreased matching effect, difficulty in similarity matching, etc.

Pending Publication Date: 2018-11-16
GUILIN UNIV OF AEROSPACE TECH
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Problems solved by technology

However, no matter what type of method it is, most of them are only suitable for short baselines and small viewing angles. When faced with wide baselines and large viewing angle changes such as oblique images, the matching effect drops sharply.
The main reason is that the large viewing angle causes a huge contrast in the neighborhood information of the line segment to be matched, which makes it difficult to match the similarity.

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  • Straight line matching method based on affine projection matrix model
  • Straight line matching method based on affine projection matrix model
  • Straight line matching method based on affine projection matrix model

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] The method for oblique photographic line matching under the affine projection matrix model of the present invention comprises the following steps:

[0024] 1. Calculate the affine projection matrix according to the rough pose information of the camera provided by the POS system (Positioning and Orientation System), including the following steps:

[0025] 1) Find the rotation matrix of the camera according to the three attitude angles provided by the POS system for the camera, including the following steps:

[0026] a) The inclined photography platform uses a five-lens camera, one in the middle looks down, and the two sides are divided into four inclined cameras: front view, rear view, left view, and right view. And the inclined photography platform is equipped with a POS device, and each picture can be obtained The attitude angle information o...

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Abstract

The invention discloses a straight line matching method based on an affine projection matrix model. The method comprises the steps of (1) finding the affine projection matrix according to camera posture information provided by a POS system, (2) correcting an original image taken by a camera into an approximate orthomorphic image according to the affine projection matrix, (3) carrying out straightline extraction matching on the approximate orthomorphic image obtained after correction to obtain a matching straight line pair, and (4) inversely transforming the matching straight line pair by using the affine projection matrix to obtain a matching image pair of the original image. According to the method, the information of a POS sensor is fully utilized, the affine correction is carried out on oblique image data and line matching and three-dimensional reconstruction are carried out, the process such as complicated camera pose estimation is eliminated, and the method is particularly suitable for scenes with low precision requirements and high real-time requirements.

Description

technical field [0001] The invention relates to a line matching method based on an affine projection matrix model, in particular to a line matching method for realizing image three-dimensional reconstruction under the affine projection matrix model. It belongs to the application fields of computer image processing, photogrammetry and remote sensing. Background technique [0002] Straight line features are ubiquitous in both natural environments and man-made objects, such as buildings on the ground, major railways and highways, solar panels of artificial satellites in space, and so on. In application fields such as image three-dimensional reconstruction, the matching of straight line segments is the first problem that needs to be solved. High-efficiency and high-precision line matching algorithms are of great value for scene matching and sequence analysis. [0003] However, the current conventional line matching methods are not effective in dealing with stereoscopic images ...

Claims

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Application Information

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IPC IPC(8): G06T3/60G06T7/33G06T7/80
CPCG06T3/604G06T7/337G06T7/80
Inventor 赵海盟王强陈伟孙山林孙鹏
Owner GUILIN UNIV OF AEROSPACE TECH
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