Back to results
US 2002/0118392 A1Published application
Image processor unit, image processing method , and storage medium
AssigneeCanon Kabushiki Kaisha
InventorNobutaka Miyake
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorNobutaka Miyake
Estimating the term…
An image processor unit minimizes image-quality degradation that can be caused by the addition of predetermined information to an image and that enables the predetermined information to be added to the image so that embedded information can be accurately extracted. The image processor unit includes an input means for inputting the image; a plurality of quantization-threshold setting means, of which occurrence probability distributions are different from one another, for setting quantization thresholds in terms of probability; a control means for controlling a regularity for selection of the plurality of quantization-threshold setting means in units of a predetermined image region according to the predetermined information; and a quantizing means that uses quantization thresholds set by the quantization-threshold setting means and thereby quantizes the image according to an error spreading method.
An image processor unit for adding predetermined information to an image, comprising:
An image processing method for adding predetermined information to an image, comprising:
A computer-readable storage medium containing a program product for adding predetermined information to an image, comprising the code means of:
Dependencies are inferred from the claim text.