Large image block epipolar line manufacturing method based on image plane epipolar line pair
A production method and nuclear line technology, applied in the field of aerospace remote sensing surveying and mapping
Pending Publication Date: 2022-04-15
中国人民解放军61540部队
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Different from traditional framed images, satellite line array images have an independent projection center for each scanning line due to their special imaging mechanism, and the lines are similar to parallel projections, so line array images cannot resemble framed images. epipolar line
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[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0052] refer to Figure 1-3 , the present invention provides a method for making large image block epipolar lines based on image plane epipolar line pairs, comprising the following steps:
[0053] Step 1. Define the original image as the left image, divide the left image into blocks, and make the starting point of the epipolar line;
[0054] Step 2, making a projection surface according to the image, and making a set of left and right image epipolar points through the epipolar starting point and the projection surface;
[0055] Step 3: Perform straight line fitting on the epipolar points of the left and right images, and make statistics on the distance from each poi...
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The invention discloses a large image block epipolar line manufacturing method based on an image plane epipolar line pair. The method comprises the following steps: firstly, dividing a remote sensing image with a larger size into a plurality of small images with the same size; taking the central point of the small image as a starting point, projecting the image point of the left image to the maximum elevation plane and the minimum elevation plane of the ground by utilizing a rational function model, performing back calculation to the right image to obtain two corresponding right image epipolar line points, and circulating until the corresponding image point exceeds the image range, thereby obtaining an epipolar line pair of the current small image based on the starting point of the left image. According to the method, block processing is carried out on the large-size remote sensing image, epipolar ray manufacturing and accurate refining are carried out one by one, the large-size image epipolar ray is better completed, an approximate epipolar ray image pair close to a sub-pixel error can be obtained, and then support is provided for follow-up processing such as remote sensing image matching and three-dimensional modeling.
Description
technical field [0001] The invention relates to the technical field of aerospace remote sensing surveying and mapping, in particular to a method for making large image block epipolar lines based on image plane epipolar line pairs. Background technique [0002] With the development and progress of aerospace technology, high-resolution and large-width satellite remote sensing images have become the main data source for obtaining geospatial information. The 3D information extracted from high-resolution linear array satellite stereoscopic Modeling, digital cities, etc., have a wide range of applications and high economic value. The strategic significance of high-resolution remote sensing satellites has become increasingly prominent, and it has become a technological highland that countries all over the world are competing to seize. [0003] Most of the current remote sensing satellites use linear array push-broom imaging. In order to increase the photographic width, some also u...
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IPC IPC(8): G06T7/73G06T17/00G06T19/20G06T3/40
Inventor 曹彬才王建荣胡燕吕源杨秀策卢学良李纲
Owner 中国人民解放军61540部队