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Coplanar cross-ratio constrained homonymous point matching method, system and device and medium

A matching method and the technology of the same-name point, which is applied in the field of photogrammetry and computer vision, can solve the problems of long time-consuming and mismatching of the same-name point matching, and achieve the effect of avoiding long time-consuming and high matching accuracy

Pending Publication Date: 2020-02-25
ZG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a matching method, system, device and medium for homonymous point matching with coplanar cross-ratio constraints in view of the deficiencies of the above-mentioned prior art. Establish feature descriptors for matching, which can overcome the problems of long time-consuming matching of points with the same name and prone to mismatching in the prior art

Method used

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  • Coplanar cross-ratio constrained homonymous point matching method, system and device and medium
  • Coplanar cross-ratio constrained homonymous point matching method, system and device and medium
  • Coplanar cross-ratio constrained homonymous point matching method, system and device and medium

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Embodiment 1

[0077] Embodiment one, as figure 2 As shown in , a matching method of homonym points with coplanar cross-ratio constraints includes the following steps:

[0078] S1: Obtain the object space point set and the coordinates of the object space point set corresponding to the object space point set, and obtain the image space point set of the object space point set in the image and the image space point set corresponding to the image space point set square point set coordinates;

[0079] S2: Based on the coplanar cross-ratio calculation method, according to the coordinates of the object-space point set, the object-space seed point cross-ratio set corresponding to each object point in the object-space point set is calculated separately, and according to the image-space The point set coordinates are calculated to obtain the image square seed point cross-ratio set corresponding to the image point at the central position of the image square point set;

[0080] S3: Obtain multiple pot...

Embodiment 2

[0132] Embodiment two, such as Figure 18 As shown in , a point matching system of the same name with coplanar cross-ratio constraints, including a point set acquisition module, a calculation module, an analysis module and a matching module;

[0133] The point set acquisition module is used to acquire the object space point set and the object space point set coordinates corresponding to the object space point set, and obtain the image space point set of the object space point set in the image and the object space point set corresponding to the object space point set The coordinates of the image square point set corresponding to the image square point set;

[0134] The calculation module is used to calculate and obtain the object space seed point cross ratio set corresponding to each object point in the object space point set based on the coplanar cross ratio calculation method, respectively, according to the coordinates of the object space point set, According to the image sq...

Embodiment 3

[0140] Embodiment 3. Based on Embodiment 1 and Embodiment 2, this embodiment also discloses a homonym point matching device for coplanar cross-ratio constraints, which includes a processor, a memory, and is stored in the memory and can run on the A computer program on a processor, when said computer program runs, it realizes as figure 2 The specific steps from S1 to S5 are shown.

[0141] Through the computer program stored on the memory and run on the processor, the same-name point matching of the present invention is realized. Based on the invariance of the coplanar cross ratio, a more accurate cross ratio set of potential object square seed points can be obtained, and the homography can be used The projective transformation relationship of the matrix can obtain a relatively accurate set of potential homonymous points. The target homonymous point set obtained from the potential homonymous point set realizes high-precision matching of homonymous points. There is no need to ...

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Abstract

The invention relates to a coplanar cross-ratio constrained homonymous point matching method, system and device and a medium. The method comprises the following steps: acquiring an object space pointset, an object space point set coordinate, an image space point set and an image space point set coordinate; based on a coplanar cross ratio calculation method, respectively calculating to obtain an object space seed point cross ratio set of each object point, and calculating to obtain an image space seed point cross ratio set of the image point at the central position according to the coordinatesof the image space point set; obtaining a plurality of potential object space seed point cross ratio sets according to the image space seed point cross ratio set and all object space seed point crossratio sets; obtaining a potential homography matrix of each potential object space seed point cross ratio set based on a homography matrix calculation method; obtaining a potential homonymy point setof the object space point set under each potential homography matrix according to each potential homography matrix; and obtaining a target homonymy point set of the object space point set from all the potential homonymy point sets. According to the method, high-precision homonymous point matching is realized without assistance of coded reflective mark points and establishment of feature descriptors.

Description

technical field [0001] The present invention relates to the technical fields of photogrammetry and computer vision, in particular to a method, system, device and medium for homonymous point matching with coplanar cross-ratio constraints. Background technique [0002] In photogrammetry, the image point formed by a spatial point in two images is called the same-named image point, or the same-named image point for short, for example figure 1 a in 1 and a 2 is the image point of any point A on the ground on the left and right images, the a 1 and a 2 It is the image point with the same name; and the image point in the space point and the image is called the image point with the same name, for example figure 1 a in 1 and A are points with the same name, a 2 and A are also points with the same name, wherein the image point with the same name is a kind of point with the same name. [0003] The same-name point matching is used in 3D reconstruction, point cloud stitching, image...

Claims

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Application Information

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IPC IPC(8): G06T7/80G06T7/30
CPCG06T7/30G06T7/80G06T2207/10028
Inventor 王晓南王西旗
Owner ZG TECH CO LTD