DE
LINEARIS 3D

FAQ

What is photogrammetry?

Photogrammetry is a process for three-dimensional of (two-dimensional) photos or videos Information derived. The basic principle is the triangulation. This means that two or more positions to the same point is targeting and can thus calculate its three-dimensional position.

What kinds of photogrammetry a given?

The classic photogrammetry comes from cartography. From aerial views maps were created. For this application, special, highly stable analog large format cameras and control devices were developed. With the advent of digital cameras, the so-called close-range gained importance, recognized the objects which are between 10cm and 50m tall.

Is photogrammetry complicated?

No. Although the mathematics behind it is expensive, everyone can in a short time the application learn. The Linearis3D software calculates the results automatically and gives advice for improvement.

How accurate is photogrammetry?

The directive, according to which the accuracy of photogrammetry systems is judged is the VDI 2634th Photogrammetry can maximum length deviations of less than 0.03 mm in 1m 3 achieve VDI 2634th The results depend on the object, the software and the camera. If you compare photogrammetry systems, you should be careful, according to which standard the accuracy is determined. Sometimes called. RMS (root mean squared) are used deviations resulting significantly lower values ​​for the same physical errors.

Why Linearis3D brands sets a?

  • accelerate brand image analysis
  • The centers of the markers can be detected very precisely (up to 1 / 30px) and allow highly accurate 3D measurement results
  • brands work for almost all objects and environmental conditions.

Can operate photogrammetry one without brands?

Yes. There are programs that work with so-called feature points. These recognize distinctive points in images and can assign them. The method proved successful eg. In architecture. Technical objects are often monotonous and there are often too few feature points to operate photogrammetry to be able.

What role does the camera for accuracy?

The camera plays a subordinate role. It is particularly important the lens and the Statbilität camera and lens. Why are not small Zoom cameras for photogrammetry well suited.

What are the advantages of photogrammetry towards laser tracker?

  • The photogrammetry is resilient to shocks. Truck traffic and presses not affect the measurement result, as long as the object in itself is not deformed.
  • You can measure in tight spaces.
  • The acquisition costs are significantly lower.
  • The photogrammetry can efficiently detect deformation states with any number of measurement points.

What are the advantages of photogrammetry towards a measurement arm?

  • The photogrammetry is resilient to shocks. Truck traffic and presses not affect the measurement result, as long as the object in itself is not deformed.
  • You can measure in tight spaces.
  • The measurement objects can be any size.
  • The photogrammetry can efficiently detect deformation states with any number of measurement points.

How photogrammetry works with the scanner together?

The photogrammetry, the accuracy of several measurements improve composite scans significantly by the scanner a reference system consisting of the brands available provides. Especially for large, smooth-surfaced objects such as cars which is very helpful. Linearis3D supported export formats all essentially scanner manufacturer.

Where can I learn more about Photogrammetry?