Sick Ag

Dietram Rinklin

Pascal Schüler

Sascha Burghardt

Stephan Walter

Stefan Walter

An optoelectronic device () is provided having an image sensor () for generating pixel images of a detection area () and a brightness correction unit () configured to modify brightness values of the pixels with a correction factor (H) to obtain a more homogeneously illuminated image. A respective correction factor (H) is calculated for individual pixels or groups of pixels from a perspective transformation (M) which converts geometries of an object plane () in the detection area () into geometries of the image plane ().

Optoelectronic device and method for brightness correction

An optoelectronic apparatus is set forth for measuring structural sizes or object sizes which has a light reception element for converting received light into image data, a reception optics arranged before the light reception element as well as an evaluation unit which is configured to identify structures or objects in the image data, to determine its dimensions in picture elements and to convert the dimensions into absolute, in particular metric, units of length with reference to a scaling factor, wherein the scaling factor can be determined in a calibration procedure. In this respect, the evaluation unit is configured to locate code regions in the image data and to read out code information from the code regions and to calculate the scaling factor during the calibration procedure from dimensions of a calibration code whose code information includes a size indication for the calibration code in the absolute units of length.

Optoelectronic apparatus for measuring structural sizes or object sizes and method of calibration

A camera system () is provided for generating an image presegmented into regions (-) of interest and of no interest, having an evaluation unit () which is designed to divide the raw image into part regions (-) to calculate a contrast value for each part region (-) and to decide with reference to the contrast value whether the respective part region (-) is a region of interest () or a region of no interest (). In this respect, the evaluation unit () has a preprocessing unit () which is implemented on an FPGA, which respectively accesses the pixels of a part region (-) and generates summed values (a), b) for the respective part region (-) and has a structure recognition unit () which calculates the contrast value of the part region (-) from its summed values (a, b) without accessing pixels of the part region (-).

Generating an image presegmented into regions of interest and regions of no interest

A code reader () having an image sensor () for the generation of images of a detection zone () resolved into pixels is provided having a decoding unit () in order to identify code regions () in the images and to readout their coded information, as well as having a verification unit () for evaluating the code quality in accordance with predefined criteria. In this connection the verification () is configured to initially generate a normalized verification image of the code from the code regions () by means of image processing for the verification.

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Waldkirch, Germany

Dietram Rinklin