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.
Claims16
An image processing apparatus comprising:
- adding means for adding first additional information including a first error correction code to an input image so that it is difficult to discriminate by the human eyes and for adding second additional information including a second error correction code 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, wherein the first error correction code and the second error correction code are used to analyze the first additional information and the second additional information respectively, and wherein a precision of the analyzing differs when using the first error correction code from when using the second error correction code.
An image processing method comprising:
- an adding step of adding first additional information including a first error correction code to an input image so that it is difficult to discriminate by the human eyes and adding second additional information including a second error correction code 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, wherein the first error correction code and the second error correction code are used to analyze the first additional information and the second additional information respectively, and wherein a precision of the analyzing differs when using the first error correction code from when using the second error correction code.
A storage medium for storing a computer-readable image processing program comprising code for performing:
- an adding step of adding first additional information including a first error correction code to an input image so that it is difficult to discriminate by the human eyes and adding second additional information including a second error correction code 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, wherein the first error correction code and the second error correction code are used to analyze the first additional information and the second additional information respectively, and wherein a precision of the analyzing differs when using the first error correction code from when using the second error correction code.
Dependencies are inferred from the claim text.