Method and device for the precise selection of a space coordinate by means of a digital image

A computer-implemented method for precise selection of a space coordinate by means of a digital image, the method comprising:

• providing a digital image of surface elements in a three-dimensional space;
• providing a point cloud, wherein space coordinates are allocated to the points that form the point cloud and surface elements are allocated to the points in the three-dimensional space;
• visualizing the surface-elements in the three-dimensional space by a first display of the digital image;
• tagging a pixel of the digital image;
• determining approximate space coordinates for the tagged pixel, which correspond to the surface element visualized by the tagged pixel in the three-dimensional space;
• superimposing a supplementary view, which displays, in a second display, the points of the point cloud which are located in a limited three-dimensional environment of the approximate space coordinates ascertained by the tagged pixel;
• and
• selecting a point of the point cloud displayed in the supplementary view.

A device for precise selection of a space coordinate by means of a digital image, the device comprising:

• a memory, in which data about at least one digital image of surface elements, and about a point cloud, is saved in a three-dimensional space, wherein space coordinates are allocated to the points which form the point cloud and surface elements are allocated to the points in the three-dimensional space;
• visualization equipment, linked to the memory through a datalink, and equipped to visualize the surface elements in the three-dimensional space by a first display of the digital image;
• an input device for tagging of a pixel of the digital image by means of a pointer;
• and
• a calculator unit, which is equipped to determine approximate space coordinates for the tagged pixel, which correspond to the surface element visualized by the marked pixel in three-dimensional space,
• wherein the visualization equipment is further equipped to generate and superimpose a supplementary view which displays, in a second display, points of the point cloud located in a limited three-dimensional environment of the approximate space coordinates determined for the tagged pixel, and
• wherein a point of the point cloud depicted in the supplementary view is selectable with the input device.