Color registration control system for a printing press

A color registration control system for a printing press having thereon a moving paper substrate, said system comprising:

• an area scanner for acquiring an image of a paper substrate on a printing press;
• and
• an image processing system adapted to receive the image and process the image to determine any color register error, wherein said image processing system includes a correlator adapted to locate register marks on the paper substrate and implemented substantially in hardware on at least one FPGA.

A color registration control system in optical communication with a paper substrate moving in a circumferential direction in a printing press, comprising:

• an image sensor for acquiring an image of the imprinted paper substrate;
• and
• an image processing system adapted to receive and process the image to determine any color register error of the printing press, wherein the image is in the form of a plurality of pixels each having a corresponding data value, the image processing system including a binarizer for converting data values to corresponding single bit values according to a binarization level, and a binary correlator using the single bit values and operating to locate register marks on the imprinted paper substrate with respect to the circumferential direction on start up of the press.

A color registration control system in optical communication with a moving paper substrate in a printing press, said system comprising:

• a camera for acquiring an image of the imprinted paper substrate in the printing press;
• and
• an image processing system adapted to receive and process the image to determine any color register error of the printing press, wherein the image is in the form of a plurality of pixels each having a corresponding data value, the image processing system including a binarizer for converting data values to corresponding single bit values according to a binarization level, a circuit for determining the binarization level according to an analysis of the data values, and a binary correlator using the single bit values and operating to locate register marks on the imprinted paper substrate.