Abstract: A device for optical scanning of markings, such as barcodes, has at least two transmitters (10, 20) that send light beams (12, 22) at different angles toward a rotating polygonal mirror (30), which deflects the light beams onto the markings being scanned. The light reflected by the markings is deflected by the polygonal mirrors (30) to separate receiver systems, so that the device has and simultaneously uses at least two separate transmitter/receiver channels.

Abstract: The invention relates to a detection system and a detection method for the detection and tracking of optical codes on objects which are transported along a monitored zone, comprising a plurality of optoelectronic sensors to read the codes and to generate corresponding reading data and comprising at least two data buses, each having its own associated bus control unit, wherein each of the plurality of sensors is connected both to the one and to the other of the two data buses and wherein the one of the two data buses with the associated bus control unit, on the one hand, and the other data bus with the associated bus control unit, on the other hand, are divided into a primary branch and a secondary branch which is subordinate to the primary branch.

Abstract: A method for operating optical sensors, particularly code readers, which have a light receptor that receives light reflected and/or returned from an object. A picture is generated from the received light and the content of the picture, such as a code, is read. At least some pictures are compressed with a picture compression algorithm of the sensor. To improve the operation of such optical sensors, especially code readers, and to improve the analysis of error detection from knowing the causes for errors, only pictures which have error information are compressed and stored. The code reader is constructed to perform these functions.

Abstract: A method for operating an optical sensor which has a light receptor that receives line-by-line reflected or returned light for a complete picture. At least some of the received pictures are compressed with a picture compression algorithm. To process the picture and more quickly store it in a memory-saving manner, the optoelectronic sensors compress the picture simultaneously with its receipt by the receptor. Optoelectronic sensors for use in this manner can be a code laser or a laser scanner for determining distance or generating separation pictures.

Abstract: A method is described for the identification and localization of objects, where at least one transponder provided on the respective object is excited to emit transponder data stored in the transponder which characterize the respective object and where the transponder data emitted are detected. The object is additionally scanned by at least one optical sensor. Furthermore, the object is identified and its location determined from a combination of optical data detected by the optical sensor and the transponder data identified. Furthermore, a corresponding apparatus for the performance of the method is described.

Abstract: The invention relates to a method of recognizing a code which is encoded inside an image data set which contains a piece of respective information on a gray scale value for each of a plurality of picture elements. At least one dilation operation and/or erosion operation is carried out on the image data set.

Abstract: An apparatus and method for the recognition of codes has a light transmitter for the transmission of light signals in the direction of a scanning region, a light receiver for the reception of a light signal remitted from the scanning region, and a control and evaluation unit for the control of the light transmitter and the light receiver and for the determination of a code from the light signal received. The control and evaluation unit includes a trigger circuit triggering the determination of a code and a distance determination unit or image detection unit (which acts on the trigger circuit) for the detection of an object present in the scanning region which is integrated into the apparatus.

Abstract: A method is described of detecting two-dimensional codes, in particular matrix codes, which include a plurality light and dark data bits arranged two dimensionally, in particular in matrix form. In the method, the code is detected as a gray scale value image; the detected gray scale value image is split into image areas corresponding to the individual data bits and a binarizing threshold representing a specific gray scale value is determined for the image areas. A respective binarizing of the gray scale value of the individual image areas is carried out by means of the binarizing threshold to produce a bit sequence which represents the data bits and consists of the values 0 and 1. The bit sequence is subsequently supplied to an error correction algorithm to recognize and/or correct bit errors within the bit sequence. In accordance with the invention, those so-called uncertain image areas are determined whose gray scale values each lie close to the binarizing threshold.

Abstract: The echo time in an MR pulse sequence is optimized in accordance with the application desired. Advantageously, the echo time is selected to cause a partial volume signal cancellation from veins as compared with background tissue, and the MR pulse sequence is of a velocity-compensated type. MR data are acquired from gradient echoes. Multiple echoes may be used to extract information (such as volume content and susceptibility) about the material under investigation.

Abstract: A method of operating a bar code reader (16) in which one or more bar codes (25,26) are detected at different positions (X1, X2) within a scanning range of the bar code reader (16) by the latter, the scanning distance (d1, d2) between the bar code reader (16) and the respectively detected bar code (25,26) is found anf the position (X0, Y0, Z0) and/or the scanning angle (&agr;, &bgr;, &ggr;) of the bar code reader (16) is foubd from the respectively found scanning distance (d1, d2) and from known position data (X1, X2)of the detected bar code (25,26).

Abstract: A method of reading of a bar code consisting of a predetermined number of code elements for the generation of a binary signal with sequential high/low phases, the length of which correspond to the widths of the sequential code elements. The bar code is sensed by at least two scanning beams from different directions along different scanning lines. At least some of the regions of the bar code are scanned by a scanning beam and are respectively detected as a code segment, and wherein at least some of the detected code segments are selected with respect to predetermined decision criteria and combined for the reconstruction of the scanned bar code. Furthermore an apparatus is described for carrying out the method.