Method for geo-referencing an imaged area
First Claim
1. A method for geo-referencing an area by means of an imaging optronics system which comprises a step of acquiring M successive images of the area by means of a detector, the area for which the step of acquiring is carried out being distributed between these M images, with M≧
- 1, the method further comprising;
measuring P distances d1, d2, . . . , dp between the system and P points of the area, called range-found points, with P≧
3, these range-found points being distributed in K of said images with 1≦
K≦
M,acquiring the positioning xm, ym, zm of the detector at the times of acquisition of the M images,measuring the attitude (φ
m, θ
m, ψ
m of the detector at the times of acquisition of the M images,acquiring the coordinates in these K images of the points called image points (p1, q1), (p2, q2), . . . , (pP, qP) corresponding to the P range-found points, andestimating the parameters of exposure conditions xe, ye, ze, ψ
e, θ
e, φ
e corresponding to the M images as a function of positionings, of attitudes, of distances and of coordinates of the image points, in order to correct the errors on the parameters xm, ym, zm, ψ
m, θ
m, φ
m of each of the M images,wherein M≧
3, and the M images of the area are acquired in succession, these images presenting areas of overlap two by two and further comprising extracting homologous primitives in the areas of overlap of these M images and mapping the images two by two on the basis of these homologous primitives, andwherein when P=K, the range-found points are respectively at the center of each of the images.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for geo-referencing an area by an imaging optronics system which comprises acquiring M successive images by a detector, the imaged area being distributed between these M images, with M≧1. It comprises: measuring P distances d1, d2, . . . , dP between the system and P points of the area, called range-found points, with P≧3, distributed in K of said images with 1≦K≦M; acquiring the positioning xm, ym, zm of the detector at acquisition of the M images; measuring the attitude φm, θm, ψm of the detector at acquisition of the M images; acquiring the coordinates in these K images of image points (p1, q1), (p2, q2), . . . , (pP, qP) corresponding to the P range-found points; and estimating the parameters of exposure conditions xe, ye, ze, ψe, θe, φe corresponding to the M images as a function of positionings, of attitudes, distances and coordinates of the image points, to correct errors on the parameters xm, ym, zm, ψm, θm, φm of each of the M images.
29 Citations
6 Claims
-
1. A method for geo-referencing an area by means of an imaging optronics system which comprises a step of acquiring M successive images of the area by means of a detector, the area for which the step of acquiring is carried out being distributed between these M images, with M≧
- 1, the method further comprising;
measuring P distances d1, d2, . . . , dp between the system and P points of the area, called range-found points, with P≧
3, these range-found points being distributed in K of said images with 1≦
K≦
M,acquiring the positioning xm, ym, zm of the detector at the times of acquisition of the M images, measuring the attitude (φ
m, θ
m, ψ
m of the detector at the times of acquisition of the M images,acquiring the coordinates in these K images of the points called image points (p1, q1), (p2, q2), . . . , (pP, qP) corresponding to the P range-found points, and estimating the parameters of exposure conditions xe, ye, ze, ψ
e, θ
e, φ
e corresponding to the M images as a function of positionings, of attitudes, of distances and of coordinates of the image points, in order to correct the errors on the parameters xm, ym, zm, ψ
m, θ
m, φ
m of each of the M images,wherein M≧
3, and the M images of the area are acquired in succession, these images presenting areas of overlap two by two and further comprising extracting homologous primitives in the areas of overlap of these M images and mapping the images two by two on the basis of these homologous primitives, andwherein when P=K, the range-found points are respectively at the center of each of the images. - View Dependent Claims (2, 3, 4, 5, 6)
- 1, the method further comprising;
Specification
-
- Resources
-
Current AssigneeThales SA
-
Original AssigneeThales SA
-
InventorsSimon, Alain
-
Primary Examiner(s)Chen, Wenpeng
-
Application NumberUS13/516,728Publication NumberTime in Patent Office1,805 DaysField of SearchNoneUS Class Current1/1CPC Class CodesG01C 11/06 by comparison of two or mor...G01C 11/34 Aerial triangulationG01S 17/89 for mapping or imagingG06T 17/05 Geographic modelsG06T 2207/10032 Satellite or aerial image; ...G06T 7/33 using feature-based methodsG06T 7/73 using feature-based methods
