Method in constructing a model of a scenery and device therefor

A method for updating a model of a scenery, wherein the model is based on a plurality of images depicting the scenery, the model defining three-dimensional structures of objects depicted in the plurality of images, the method comprising:

• defining a geographical area that forms an area to be represented by the model;
• receiving a plurality of new images depicting the scenery, wherein each new image is acquired by a camera from a position and the position is within the geographical area;
• determining whether the plurality of new images fulfills a pre-defined updating criterion;
• and
• initiating an update of the model when the number of new images fulfills the updating criterion.

A device associated with constructing a model of a scenery, the device comprising a processor configured to:

• receive a plurality of images depicting the scenery, wherein each image is acquired by a camera from a position aiming at the scenery in a rotational angle;
• create a plurality of sub-models, wherein each of the plurality of sub-models is created by:
• selecting a basis image among the plurality of images;
• determining related images among the plurality of images, wherein each related image is related to the basis image based on a depicted part of the scenery in the related image and a depicted part of the scenery in the basis image being at least partly overlapping;
• determining the sub-model based on the basis image and the related images, wherein the sub-model defines relative positions and rotational angles of the cameras used to acquire the basis image and the related images and the sub-model further defines three-dimensional structures of objects depicted in the plurality of images;
• and
• separately merge the defined relative positions and rotational angles of cameras for the plurality of sub-models.

A computer program product comprising a computer-readable medium with computer-readable instructions such that when executed on a processing unit the computer program product causes the processing unit to:

• receive a plurality of images depicting the scenery, wherein each image is acquired by a camera from a position aiming at the scenery in a rotational angle;
• create a plurality of sub-models, wherein each of the plurality of sub-models is created by:
• selecting a basis image among the plurality of images;
• determining related images among the plurality of images, wherein each related image is related to the basis image based on a depicted part of the scenery in the related image and a depicted part of the scenery in the basis image being at least partly overlapping;
• and
• determining the sub-model based on the basis image and the related images, wherein the sub-model defines relative positions and rotational angles of the cameras used to acquire the basis image and the related images and the sub-model further defines three-dimensional structures of objects depicted in the plurality of images;
• and
• separately merge the defined relative positions and rotational angles of cameras for the plurality of sub-models.