Image processing apparatus and method and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsEihiro Sakaki, Hiroyuki Yamazaki
Life of this patent
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Abstract
It is an object to provide an adding technique for enabling additional information to be certainly decoded from an image to which two or more kinds of additional information was added to an input image so that it is difficult to discriminate by the human eyes. To accomplish this object, for example, a plurality of kinds of additional information is periodically added to the input image at different periods so that it is difficult to discriminate by the human eyes. The image to which those additional information was added is outputted to an image forming unit.
Claims14
An image processing apparatus comprising:
- adding means for periodically adding first additional information to an input image by a first period so that it is difficult to discriminate by the human eyes and for periodically adding second additional information different from said first additional information by a second period different from said first period so that it is difficult to discriminate by the human eyes;
- and
- output means for outputting the image to which predetermined additional information was added by said adding means to an image forming unit.
An image processing method comprising:
- an adding step of periodically adding first additional information to an input image by a first period so that it is difficult to discriminate by the human eyes and periodically adding second additional information different from said first additional information by a second period different from said first period so that it is difficult to discriminate by the human eyes;
- and
- an outputting step of outputting the image to which predetermined additional information was added by said adding step to an image forming unit.
A storage medium for storing an image processing program in a state where said program can be read out from a computer, said program comprising:
- an adding step of periodically adding first additional information to an input image by a first period so that it is difficult to discriminate by the human eyes and periodically adding second additional information different from said first additional information by a second period different from said first period so that it is difficult to discriminate by the human eyes;
- and
- an outputting step of outputting the image to which predetermined additional information was added by said adding step to an image forming unit.
Dependencies are inferred from the claim text.