Image processing method, manipulation detection method,...

Details Image processing method, manipulation detection method,... Image processing method, manipulation detection method,...

2007-10-16

2007-10-16

Tran, Douglas Q. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Data corruption, power interruption, or print prevention

C358S001180, C358S003280

Reexamination Certificate

active

10351510

ABSTRACT:
An image processing method for detecting alteration of data formed on an image formation medium on which a main data image and a copy detection latent image are formed. The method comprises a first image creation step of creating an image in a state identical to a state of an image which is obtained by scanning the image formation medium on which the main data image and the copy detection latent image are formed, a one-way value operation step of effecting a one-way value operation on the image created at the first image creation step to calculate a one-way value, an image conversion step of converting the one-way value into an image representing the one-way value, a second image creation step of creating an image by superimposing the image representing the one-way value, the main data image and the copy detection latent image.

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