Image-based edge measurement

A method for an image-based measurement of a scene using a handheld apparatus, comprising:

• a recording of at least one first image and one second image of the scene by at least one camera of the apparatus, wherein the first image and the second image have an overlapping image region;
• a photogrammetric evaluating of the first and the second image;
• a graphic outputting of an image representation of the scene on a display unit;
• automatically performing a proceeding edge measurement, as part of which, in each case without user intervention, edges in the scene are identified utilizing the first and the second image of the scene, edge lengths of the identified edges are ascertained based on the photogrammetrically evaluated images, and the ascertained edge lengths are displayed in the image representation of the scene.

A portable apparatus for image-based measurement of a scene, the portable apparatus comprising:

• a. a housing with a front side and a rear side;
• b. at least one camera for recording images of the scene;
• c. a control unit for effecting a recording of images of the scene;
• d. an evaluation unit with an algorithm for photogrammetric evaluation of the images;
• and
• e. a display unit, which is arranged on the front side, for displaying an image representation of the scene,
• wherein the evaluation unit includes an algorithm for performing an automatically proceeding edge measurement functionality, as part of which the evaluation unit is configured, in each case without user intervention,
• f. to identify edges in the scene on the basis of the images of the scene, and
• g. to ascertain edge lengths of the identified edges based on the photogrammetrically evaluated images, and
• wherein the control unit is configured to enable the ascertained edge lengths to be displayed on the display unit as values in the image representation of the scene.

A computer program product with program code, which is stored on a machine-readable carrier, for performing a method for an image-based measurement of a scene using a handheld apparatus, wherein the program is executed in a computation unit of the apparatus to cause the apparatus to perform a method comprising:

• a. recording of at least one first image of the scene by at least one camera of the apparatus;
• b. performing a photogrammetric evaluation of the first image;
• c. graphically outputting of an image representation of the scene on a display unit;
• and
• d. performing an automatic proceeding edge measurement, as part of which, in each case without user intervention,
• edges in the scene are identified utilizing the at least one image of the scene,
• edge lengths of the identified edges are ascertained based on the photogrammetrically evaluated images, and
• the ascertained edge lengths are displayed in the image representation of the scene.