摘要:
To provide a device capable of determining uniquely the direction of rotation applied to an image and extracting digital watermark information correctly even in the case where a registration signal having a symmetric axis is embedded. A device for enabling digital watermark information to be extracted from image data having the digital watermark information embedded therein in such a manner that it can hardly be perceived by human eyes, in which processing for extracting rotation information and position information from the image data is performed plural times for rotation angles different from one another. For extracted position and rotation information, confidence coefficients indicating accuracy thereof are calculated. The position and rotation angle at which the digital watermark information is embedded are determined based on the confidence coefficients.
摘要:
An image processing apparatus and method for deriving a digital watermark embedded in an image is provided which has a recognizing unit for recognizing a predetermined characteristic area in the image and a deriving unit for extracting the digital watermark from the image data in the recognized characteristic area.
摘要:
An image processing method is provided. This method comprises: a first information extraction step of extracting first information, including a registration signal used to correct the geometrical distortion of an image; a determination step of employing results obtained at the first information extraction step to determine whether second information is to be extracted from the image; a division step of dividing the image into at least one block; and a selection step of selecting the block. In this method, the first information and the second information are embedded in the image as invisible or less visible electronic watermarks, and are added to components of said image that are less easily discerned by a human's eyes. Further, the amount of said first information is smaller than the amount of said second information, and the first information is embedded more deeply in the image than is the second information.
摘要:
It is required to protect the copyrights and the like of partial images which form respective parts of an image obtained by reading an image, exchanged using a print as a medium, by an image scanner or the like. Input image data is divided into a plurality of image regions having different features, digital watermarks, which are embedded in the detected image regions by embedding methods corresponding to the features of the image regions, are extracted, and the availability of the input image is checked on the basis of the extracted digital watermarks.
摘要:
When determining whether or not an image of an original input from an image reading device is a copy-prohibition image, a mounting position, a mounting angle or the like of the original is detected, and it is determined whether or not exact determination can be performed. If an exact determination cannot be performed, a signal instructing to again read an image of the original is output, and the operator is provided with a warning.
摘要:
It is required to protect the copyrights and the like of partial images which form respective parts of an image obtained by reading an image, exchanged using a print as a medium, by an image scanner or the like. Input image data is divided into a plurality of image regions having different features, digital watermarks, which are embedded in the detected image regions by embedding methods corresponding to the features of the image regions, are extracted, and the availability of the input image is checked on the basis of the extracted digital watermarks.
摘要:
A configuration is provided in which whether or not an article to be copied by a scanner is a copy-prohibited article such as a bill can be judged in a relatively short period of time. First, a copy object is prescanned by a scanner and read in rough pixel density, and with respect to the image, whether or not a copy object is a copy-prohibited article is checked. After completion of checking, main scanning is carried out to obtain a desired image of high density. As the result of the checking, the possibility that a copy object is a copy-prohibited article is examined, and when the possibility is low, said image of high density is output, and when the possibility is high, the image is checked again. As the result of checking, the possibility that a copy object is a copy-prohibited article is examined, and when the possibility is high, processing that the image is totally coated is carried out to output an unnormal image, and when the possibility is low, a normal image is output.
摘要:
A registration signal embedding method of embedding registration signals adaptively in accordance with image signals. The frequency property of image data is determined, and either a first registration signal or a second registration signal is selected in accordance with the frequency property, and is added to image data. The registration embedded in this way has the advantage of increased resistance and easy detection.
摘要:
A deterrent effect for a forgery of an image can be provided and both of the protection of a picture quality of an image of a relatively low similarity and the prevention of a forgery of an image of a relatively high similarity can be realized. For this purpose, an image processing apparatus has embedding processing means for embedding predetermined information which can specify an output apparatus and an output date/time as a digital watermark having a resistance according to a similarity with a specific image 106 into an output image, thereby enabling the deterrent of a forgery of the specific image 106 according to the similarity to be realized while outputting an image which the operator intends to output.
摘要:
When an image including a composite figure made of a predefined figure and a free-form figure is scanned, the position and shape of the free-form figure and the predefined figure are appropriately adjusted. The composite figure is separated into a predefined figure and a free-form figure. With respect to the separated predefined figure, a representative point is set at a predetermined position according to the type of the predefined figure and a representative point is set for the free-form figure based on a criterion according to a type of the free-form figure. If the representative point of a predefined figure is in the vicinity of the representative point of the free-form figure, the free-form figure is corrected based on the position of the representative point of the free-form figure and the position of the representative point of the predefined figure.