Abstract: The invention relates to a computer-implemented method for the measurement of an object, wherein the method comprises the following steps: ascertainment of measurement data using a radiographic measurement of the object, wherein the measurement data generates a digital representation of the object with a large number of items of image information of the object; and carrying out the following steps at least before ending the ascertainment of measurement data: analysis of at least one portion of the digital representation of the object; optimization of at least one recording parameter of the radiographic measurement using the analysed portion of the digital representation of the object; and adaptation of the step of ascertainment of measurement data taking the at least one recording parameter into consideration. The invention thus provides a computer-implemented method that has an increased efficiency.

Abstract: Described is a method for compressing measurement data of a volume which comprises an object, wherein a digital representation of the object comprising a plurality of image information items of the object is generated by the measurement. The method comprises: providing an analysis specification for at least one predetermined region in the measurement volume; determining the measurement data in the measurement volume; defining a subset of the measurement data which corresponds to the at least one predetermined region of the analysis specification; selecting at least one compression rate for the subset on the basis of the analysis specification; selecting a first compression method for a remainder of the measurement data outside the subset, the first compression method having a compression rate; compressing the subset with the selected at least one compression rate, and compressing the remainder of the measurement data by way of the first compression method.

Abstract: Described is a method for segmenting measurement data from measurement of an object that has at least one material transition region. The measurement data are used to generate a digital object representation that has the material transition region and a multiplicity of spatially resolved image information items relating to the object. The method may include: determining measurement data that have at least one small structure having an extent which is less than a predefined extent; determining at least two homogeneous regions in the measurement data and/or in the digital object representation, wherein at least one homogeneous regions has a small structure; analysing a local similarity of the multiplicity of spatially resolved image information items; adapting an extent of each homogeneous region until at least one border region is arranged at an expected position of a material transition region; and segmenting the digital object representation based on the adapted homogeneous regions.

Abstract: Described is measuring an object by: determining measurement data using a device for measuring the object, wherein the measurement data generates a digital representation of the object with image data; and before the determining measurement data has ended: analyzing part of the digital representation to identify defects; if a defect is identified: determining at least one conformity result relating to the analyzed part, the conformity result indicating to what extent the analyzed part with the determined defect fulfils at least one predefined conformity criterion for the object; and if no defect is identified and sufficient measurement data have been acquired to determine that the analyzed part fulfils the at least one conformity criterion: generating a conformity result relating to the analyzed part, the conformity result indicating that the at least one predefined conformity criterion is fulfilled for the object; adapting the step of determining, taking the conformity result into account.

Abstract: Described is a computer-implemented method for measuring an object comprising the following steps: determining measurement data by means of a device for measuring the object, wherein the measurement data generates a digital representation of the object with a plurality of image data of the object; and carrying out the following steps at least before the step of determining measurement data has ended: analyzing at least one dimensional measurement variable of at least one part of the digital representation of the object, determining at least one conformity result relating to the analyzed part of the digital representation of the object, wherein the conformity result indicates to what extent the analyzed at least one dimensional measurement variable fulfils at least one predefined conformity criterion for the object, and adapting the step of determining measurement data taking the at least one conformity result into account.

Abstract: Described is a computer-implemented method for monitoring the status of a device for investigating objects, wherein the investigation of an object involves determining measurement data by measuring the object and operating data of the device is determined during the investigation of the object. The method includes: determining measurement data of the object by means of the device; determining operating data of the device during the determining measurement data of the object; determining at least one quality parameter from the measurement data; analysing the operating data and the at least one quality parameter; and determining a status characteristic value based on the analysing in order to monitor the status of the device, wherein the status characteristic value indicates a status of the device. The computer-implemented method comparatively easily monitors the functionality of devices for investigating objects during adaptive measurements.

Abstract: The invention relates to a computer-implemented method for segmenting measurement data from a measurement of an object, the object having at least one Material transition region, the measurement data generating a digital representation of the object having the at least one at least one material transition region, the digital object representationhaving a plurality of pieces of spatially-resolved image information of the object, the method comprising the following steps: determining the measurement data; segmenting at least two homogenous regions of the digital object representation; and determining the position of at least one material transition region between the at least two homogeneous regions. The invention thus provides an improved computer-implemented method for segmenting measurement data from a measurement of an object, which correctly detects material transitions from the measurement data of the object.

Abstract: The invention relates to a method for determining errors in at least one parameter of the object derived from a digital representation of an object, wherein the digital representation comprises a large number of pixels arranged on a grid. At least one item of image information that quantifies a material-specific value of the object at the position of the pixel is assigned to a pixel. The image information results from a metrological mapping of the object, and is overlaid with statistical noise. As a result of the metrological mapping of the object, the image information of a first pixel is correlated to the image information of pixels within a surroundings of the first pixel defined by a correlation length of the image.

Abstract: Described is method for segmenting measurement data from a measurement of an object having at least one material transition region, the measurement data generating a digital object representation having the at least one material transition region and comprising pieces of spatially-resolved image information of the object. The method comprises: determining the measurement data comprising at least one artefact; determining at least two homogeneous regions in the measurement data and/or in the digital object representation; analysing a local similarity of pieces of spatially resolved image information; adjusting an extent of each homogeneous region until at least one boundary region of each homogeneous region is located at an expected position of a material transition region; segmenting the digital object representation based on the adjusted homogeneous regions.

Abstract: Described is a computer-implemented method for determining uncertainties in measurement data from a measurement of an object, wherein a digital representation of the object is generated by the measurement. The object representation has items of image information, which each indicate a value of a measurement variable for the object at a defined position of the object. Statistical noise is superimposed on the image information. The method includes determining the object representation, determining a distance field from the image information relating to the object representation, determining a strength of the statistical noise in the image information, determining an uncertainty of the distance values of the distance field on the basis of the strength of the statistical noise, and determining an uncertainty of the position of at least one point on at least one material boundary surface from the uncertainty of the distance values of the distance field.

Abstract: Described is a computer-implemented method for determining material interfaces of an object from at least one measurement of the object, a rasterized representation of the object being produced by means of the measurement, the rasterized representation having a plurality of measurement points, a measurement point having at least one piece of image information, which indicates a value of a measurement variable for the object at the position of the measurement point. The method comprises the determining of a parameterization of the rasterized representation of the object, the parameterization assigning at least one parameter to each of the measurement points of a subset of the measurement points of the representation, and the applying of at least one parameter-dependent edge-detection operator to the measurement points of the rasterized representation, an edge-detection operator being designed to determine the location of at least one material interface in the rasterized representation.

Abstract: Described is a computer-implemented method for ascertaining a value of a geometric parameter of at least one part to be measured of an object from at least one two-dimensional image of a measurement volume, wherein the measurement volume includes the object and the part of the object that is to be measured has a position in the measurement volume, wherein the at least one two-dimensional image is assigned to a recording geometry, wherein the recording geometry describes a geometric relationship between a detector for ascertaining two-dimensional images and the object, wherein the method comprises: ascertaining at least one two-dimensional image of the measurement volume; and identifying the at least one part to be measured of the object in the at least one two-dimensional image, and ascertaining a value of the geometric parameter of the at least one part to be measured that has been identified.

Abstract: The invention relates to a computer-implemented method for determining surfaces in measurement data from a measurement of a volume which contains an object, a digital representation of the object being produced by means of the measurement data, the object representation having a plurality of pieces of image information of the object, the method comprising the following steps: providing an evaluation specification for at least one predefined three-dimensional region of the volume, said region containing the object; ascertaining the measurement data; defining a subregion of the measurement data that corresponds to the at least one predefined three-dimensional region; and determining at least one surface of the object representation in the subregion. The invention makes the determination of the surfaces of the object representation fast and accurate. Therefore, a computer-implemented method that improves the provision of surface data from the measurement data is provided.

Abstract: The invention relates to a computer-implemented method for determining at least one geometric parameter required for an evaluation of measurement data, wherein the measurement data are determined by means of a radiographic measurement of a component having a component geometry, wherein a digital component representation is generated by the measurement data, wherein the method comprises the following steps: determining the measurement data by means of a radiographic measurement of a component; identifying regions one of in the digital component representation or in the component geometry as reference regions; determining at least one geometric parameter required for an evaluation of the determined measurement data, by means of the reference regions. Less computing power than in the prior art is required with the method. Furthermore, the method is able to be employed without great complexity.

Abstract: Described is a method for compressing measurement data of a volume which comprises an object, wherein a digital representation of the object comprising a plurality of image information items of the object is generated by the measurement. The method comprises: providing an analysis specification for at least one predetermined region in the measurement volume; determining the measurement data in the measurement volume; defining a subset of the measurement data which corresponds to the at least one predetermined region of the analysis specification; selecting at least one compression rate for the subset on the basis of the analysis specification; selecting a first compression method for a remainder of the measurement data outside the subset, the first compression method having a compression rate; compressing the subset with the selected at least one compression rate, and compressing the remainder of the measurement data by way of the first compression method.

Abstract: Described is compressing a digital representation of an object, wherein the object representation comprises image information items for the object that each specify a value of a measurand for the object at a defined position of the object. Compressing includes determining the object representation, determining a distance field from the image information items of the object representation that comprises a plurality of data points in a grid, the distance field assigns at least one distance value to each of the data points that in each case indicate the shortest distance of the data point from a closest material boundary of the object, determining a near region around a material boundary of the object, determining a sub-set of data points of the distance field which lie outside the near region, deleting the sub-set of data points, and saving the distance field in the form of a compressed object representation.

Abstract: The invention relates to a computer-implemented method for the measurement of an object, wherein the method comprises the following steps: ascertainment of measurement data using a radiographic measurement of the object, wherein the measurement data generates a digital representation of the object with a large number of items of image information of the object; and carrying out the following steps at least before ending the ascertainment of measurement data: analysis of at least one portion of the digital representation of the object; optimization of at least one recording parameter of the radiographic measurement using the analysed portion of the digital representation of the object; and adaptation of the step of ascertainment of measurement data taking the at least one recording parameter into consideration. The invention thus provides a computer-implemented method that has an increased efficiency.

Abstract: Described is a computer-implemented method for determining material interfaces of an object by means of at least one measurement of the object, a rasterized representation of the object having a plurality of pixels being produced by means of the measurement, each pixel having at least one piece of image information, which indicates a value of a measurement variable for the object at the position of the measurement point. The method comprises the determining of a parameterization of the rasterized representation of the object, the parameterization assigning at least one parameter to each of the measurement points of a subset of the measurement points of the representation, and the applying of at least one parameter-dependent edge-detection operator to the measurement points of the rasterized representation, an edge-detection operator being designed to determine the location of at least one material interface in the rasterized representation.

Abstract: Described is determining a local deviation of a geometry of an object from a target geometry of the object on the basis of a digital representation of the object that comprises image information items that each specify a value of a measurand for the object at a defined position of the object. This includes determining the object representation, determining a distance field from the image information items of the object representation that comprises distance values for a specific point of the distance field that specifies the shortest distance of the point from a closest material boundary of the geometry of the object, determining the target geometry of the object, and determining the local deviation of the geometry of the object from the target geometry of the object at a test point on a material boundary predefined by the target geometry.

Abstract: Computer-implemented methods for monitoring the functional state of a system for the computer-tomographic examination of workpieces by carrying out one or more computer-tomographic measurements on the workpiece. The measurements each result here in at least one measured value for at least one measurement variable. The method for monitoring the functional state selects measured values for at least one measurement variable from at least two measurements on one or more workpieces. At least one degree of variation for the selected measured values of the at least one measurement variable as well as at least one reference degree of variation for measured values of the at least one measurement variable is determined. The functional state of the system is determined by comparing the at least one determined degree of variation with the at least one reference degree of variation for the at least one measurement variable.