Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

The Goodyear & Tire Rubber Company

Guenther Kostka

Peter Schmitt

Oliver Scholz

Ulf Hassler

Matthias Kube

Rolf Behrendt

Wolfgang Groeger

Andreas Jobst

Franz Uhrmann

Lars Seifert

Christian Huegel

Ralf Goldstein

Dieter Schmidt

Randolf Hanke

Markus Wachter

Thomas Wenzel

Embodiments provide image capturing apparatuses having a screen, a plurality of mirrors and a plurality of cameras. The plurality of mirrors and the plurality of cameras is arranged such that the plurality of cameras capture a portion of the screen via a respective one of the plurality of mirrors, wherein the plurality of cameras is arranged obliquely with respect to the screen.

Apparatus for optically capturing a screen

A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.

Apparatus and method for determining a distance measure on wound-up materials

An apparatus for parameterizing a plant includes a recorder for recording a three-dimensional data set of the plant including not only volume elements of non-covered elements of the plant, but also volume elements of elements of the plants that are covered by other elements, and a parameterizer for parameterizing the three-dimensional data set for obtaining plant parameters.

Apparatus and method for parameterizing a plant

Among a device and a method for sensing at least partially specular surfaces, the device includes a detection face and an illuminator configured to project a pattern onto the detection face by reflection via the at least partially specular surface.

Device and method for sensing at least one partially specular surface with column-by-column analysis of the global or local intensity maximum

A device for measuring a complexly formed object includes a plurality of light-section measuring devices, a rotator for causing a rotation between the complexly formed object and the plurality of light-section measuring devices around a rotation axis, wherein each of the plurality of light-section measuring devices is configured to generate a respective fan beam in a respective fan plane, wherein the fan planes are arranged such that the rotation axis extends within each of the fan planes, wherein the plurality of light-section measuring devices is configured such that the fan beams are directed to the complexly formed object from different fan directions which, when projected into a common plane through which the rotation axis extends, by rotation around the rotation axis, differ from each other.

Device and method for measuring a complexly formed object

Position errors of the flat-panel detector in the axes system of the radiation penetration system relative to a necessitated position which remain, for example, after a coarse setup of the radiation penetration system are balanced and thus the accuracy of the radiation penetration system is brought almost randomly close to the accuracy which would have resulted if the flat-panel detector had been exactly adjusted mechanically subsequently by executing a geometrical correction of the radiation penetration raw image, so that a change of a projection of the penetrated object in the radiation penetration raw image due to the position error is reduced or corrected.

Radiation penetration system and calibration of the same

A device for detecting a plant against a background includes a provider for providing a plurality of different photographs of the plant leaf against the background, the photographs differing in that image points of the different photographs relating to the same location of the plant leaf are illuminated with different levels of brightness, a selector for selecting such image points, from the different photographs, whose levels of brightness are within a predetermined range, an image point of a first photograph being selected for a first location of the plant leaf, and an image point of a second, different photograph being selected for a different location of the plant leaf to obtain a representation of the plant leaf against the background, the representation being composed of and/or merged from different photographs, and a segmenter for segmenting the composite photograph to obtain a segment representation having the plant leaf without the background or the background without the plant leaf.

Device and method for detecting a plant against a background using photographs with different levels of brightness

A camera arrangement for image detection includes radiation-sensitive sensor elements arranged to record a common object plane in offset fields of view, a balancer and a shading corrector. The balancer is implemented, for balancing the sensor elements, to post-process for each sensor element a sensor signal of the respective sensor signal n by means of balancing information determined in balancing and stored, so that a variation of the intensity I of incoming radiation in the respective field of view leads to a change of the respective post-processed sensor signal according to a desired mapping function F(aI), the mapping functions F( ) of all factory-balanced sensor elements being identical, and abeing a sensor-individual factor. The shading corrector is implemented on the basis of a recording generated by means of the camera arrangement with the sensor elements, to change the sensor element-individual factors aso that intensity differences of the recording are balanced across the common object plane.

Camera arrangement for image detection, x-ray system and method for balancing and operating

A device for detecting a plant includes a two-dimensional camera for detecting a two-dimensional image of a plant leaf having a high two-dimensional resolution, and a three-dimensional camera for detecting a three-dimensional image of the plant leaf having a high three-dimensional resolution. The two-dimensional camera is a conventional high-resolution color camera, for example, and the three-dimensional camera is a TOF camera, for example. A processor for merging the two-dimensional image and the three-dimensional image creates a three-dimensional result representation having a higher resolution than the three-dimensional image of the 3D camera, which may include, among other things, the border of a leaf. The three-dimensional result representation serves to characterize a plant leaf, such as to calculate the surface area of the leaf, the alignment of the leaf, or serves to identify the leaf.

Device and method for detecting a plant

The material strength of extensive objects can be determined efficiently by using two distance measurers, wherein a first distance measurer determines the distance to a first main surface of the object and a second distance measurer determines the distance to a second main surface object opposing the first main surface. If potential measurement errors due to the extensive geometry are avoided by determining a reference distance between the first distance measurer and the second distance measurer by a reference unit via X-radiation, the thickness of the object between the first main surface and the second main surface can be determined with high accuracy and velocity.

Method and apparatus for thickness measurement

The resolution of an optical measurement system for measuring a surface of an object, wherein a measurement light strip is captured on a surface of an object by means of a matrix sensor with a resolution limited by quantization in a quantization direction, can be improved by calculating an effective mapping location in the quantization direction on the basis of the associated real mapping location and a further real mapping location adjacent to the associated real mapping location in a direction perpendicular to the quantization direction.

Apparatus and method for improving the measurement accuracy of digital 3D geometrical measurement systems

For generating a two-dimensional representation of an object portion arbitrarily arranged within an object, a first image comprising the object, and subsequently a second image comprising the object are generated by means of an imaging device while the object and the imaging device are moving relative to each other. By means of a signal processor, information about a position and a shape of the object portion of interest within the object and its relative motion is received so as to combine, on the basis of the information received, image portions, within the first and second images, which are associated with the object portion of interest.

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Erlangen, Germany

Guenther Kostka