Method for showing a localization error and related device

Patent metadata

Field	Value
Publication number	US-10043417-B2
Application number	US-201113335484-A
Country	US
Kind code	B2
Filing date	Dec 22, 2011
Priority date	Dec 23, 2010
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

The method according to the invention is a method for showing the localization error of a plurality of points of a georeferenced image, comprising the following steps: providing a georeferenced image, in which each image coordinate point is associated with announced values of the geographical coordinates defining the geographical localization of the object corresponding to that point of the georeferenced image; showing the georeferenced image. The method also comprises the following steps: providing, for each point of the plurality of points of the georeferenced image, an estimated value of the localization error specific to that point, said error not being uniform over the image; and showing the localization error for at least one point among the plurality of points of the georeferenced image so as to make it possible for a user to view the localization error.

First claim

The invention claimed is:

1. A method for displaying localization error of a plurality of image coordinate points of a georeferenced image, comprising:
providing a georeferenced image, in which each of the image coordinate points is associated with announced values of geographical coordinates defining the geographical localization of an object corresponding to the image coordinate point of the georeferenced image;
displaying the georeferenced image on a display;
providing, for each of the image coordinate points of the entire georeferenced image, an estimated value, estimated by a processor, each of the estimated values being the localization error specific to the corresponding image coordinate point, the localization error not being uniform over the image, wherein the localization error is estimated based on: i) conditions of an observation sensor used to capture the georeferenced image and ii) a terrain error associated with a terrain model which models the relationship between the image coordinate points; and
displaying the localization error for at least one point among the image coordinate points of the georeferenced image on the display so as to make it possible for a user to view the localization error,
wherein the conditions of the observation sensor used to capture the georeferenced image and the terrain error associated with the terrain model are independent from each other, and
wherein the terrain error associated with the terrain model is based on factors that are independent from the conditions of the observation sensor.

2. The method according to claim 1 , wherein the localization error is displayed for the image coordinate points of the entire georeferenced image.

3. The method according to claim 1 , wherein the localization error is displayed on the georeferenced image itself.

4. The method according to claim 3 , wherein the georeferenced image and the localization error are displayed via the display, the localization error being displayed on the georeferenced image intermittently.

5. The method according to claim 4 , wherein the localization error of a point of the georeferenced image is displayed when the user selects the point.

6. The method according to claim 3 , wherein an error map is displayed superimposed on the georeferenced image so as to form a combined image, in which the localization error associated with each of the points is shown by a first parameter and the object represented by that point is shown by a second parameter.

7. The method according to claim 6 , wherein the error map and the georeferenced image are displayed via the display and the display of the error map on the georeferenced image is intermittent, the error map being displayed blinking with a blinking frequency lower than the retinal remanence frequency.

8. The method according to claim 1 , wherein an error map is produced, the error map displaying the localization error for the points of the georeferenced image, and the representation of the localization error consists of displaying the error map.

9. The method according to claim 8 , wherein the error map is displayed superimposed on the georeferenced image so as to form a combined image, in which the localization error associated with each of the points is shown by a first parameter and the object represented by that point is shown by a second parameter.

10. The method according to claim 1 , wherein the observation sensor comprises a multispectral or hyperspectral vision sensor.

11. A device for representing the localization error of a plurality of image coordinate points of a georeferenced image, which comprises:
an interface configured to receive a georeferenced image, wherein each of the image coordinate points is associated with announced values of geographical coordinates defining the geographical localization of an object corresponding to the image coordinate point of the georeferenced image;
a display configured to display the georeferenced image; and
a processor configured to estimate, for each of the image coordinate points of the georeferenced image, an estimated value of the localization error, each of the estimated values respectively corresponding to the image coordinate points, the localization error not being uniform over the image,
wherein the processor is further configured to estimate the localization error based on: i) conditions of an observation sensor used to capture the georeferenced image and ii) a terrain error associated with a terrain model which models the relationship between the image coordinate points,
wherein the display is further configured to display the localization error for at least one point among the image coordinate points of the georeferenced image so as to allow a user to visualize the localization error,
wherein the conditions of the observation sensor used to capture the georeferenced image and the terrain error associated with the terrain model are independent from each other, and
wherein the terrain error associated with the terrain model is based on factors that are independent from the conditions of the observation sensor.

Assignees

• Louis Christian
• Reynaud Sebastien
• Spery Laurent
• Thales Sa

Inventors

• Louis Christian
• Reynaud Sébastien
• Spery Laurent

Classifications

• G09B29/10 Primary

  Map spot or coordinate position indicators; Map reading aids (optical projection apparatus per se G03B) · CPC title