Image processing method and apparatus

Details Image processing method and apparatus Image processing method and apparatus

H - Electricity

04

N

H04N 1/46 (2006.01) H04N 1/00 (2006.01) H04N 1/387 (2006.01)

Patent

CA 2086472

An image processing apparatus for preventing counterfeiting by adding information to read image signals and arranging a mark indicative of a position where the information is added so that the additional information can be easily extracted. An image processor processes full-colour image signals from a line sensor and a binarization circuit binarizes the signals using a pseudo half-tone processing. A density judgment circuit judges the density of the image signals and controls a modulator which adds additional information. The modulator refers to the contents of a ROM and changes dot positions in the binarized image signals based on the referred information and adds the additional information to the image signals. A FIFO compensates image signals delayed by the density judgment circuit.

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