Abstract: A method, a software application, and a reader for evaluating a matrix code in an image, in which the patterns of the individual symbol rows are reconstructed, and scanning values are determined at the intersections of the symbol row patterns. Firstly, the approximate position of each of the symbols along the symbol rows in the direction of a first dimension of the image is determined successively, with the determined pixel positions being used as the position of the symbols in the direction of the first dimension, and subsequently the patterns of the individual symbol rows along the other dimension of the complete image are determined successively. These two steps are then repeated for the other dimension. The scanning points are determined on the basis of the properties of the data modulation taking into consideration the channel distortions. A decorrelation of the scanned symbols reduceS the local inter-symbol interferences.

Abstract: A method and a device for time synchronisation of the optical transmission of data in free space from a transmitter to at least one receiver are discussed. In the method and the device, the time synchronisation between the image reproduction of a transmitter and the image recording of a camera is to be improved for the optical free space transmission between transmitter and camera.

Abstract: A method and a device for time synchronisation of the optical transmission of data in free space from a transmitter to at least one receiver are discussed. In the method and the device, the time synchronisation between the image reproduction of a transmitter and the image recording of a camera is to be improved for the optical free space transmission between transmitter and camera.