1. A process for a correspondence analysis in image data sets in order to identify within two image data sets i( 20 ) and j( 21 ) image points (pixels) u i v i u j v j corresponding with each other, comprising: in a first step, transforming the image data set i with a signature operator in such a manner, that for each pixel u i v i a signature string ( 27 ) is computed and recorded in a signature table ( 22 ) together with the pixel coordinates, in a subsequent step, transforming each pixel u j v j of the other image data set j using the same signature operator, whereupon the resulting signature strings are recorded together with the respective pixel coordinates in an additional signature table ( 23 ), checking the entries in the two signature tables ( 22 , 23 ) with respect to whether signature strings exist which can be found in both tables, and in these cases, generating a correspondence hypothesis ( 25 ) for the coordinates associated with the signature strings ( 27 ), and storing the correspondence hypothesis ( 25 ) in a hypothesis list ( 26 ) for further processing.