Abstract: Digital watermarks are embedded in image data (102)in order to enable authentication of the image data and/or replacement of rejected portions of the image data. Authentication codes are derived by comparing selected discrete cosine transform (DCT) (104) coefficients within DCT data (106) derived from the original, spatial-domain image data. The authentication codes thus generated are embedded in DCT coefficients (612) other than the ones which were used to derive the authentication codes. The resulting, watermarked data can be sent or made available to one or more recipients who can compress or otherwise use the watermarked data. Image data derived from the watermarked data—e.

Abstract: The invention, in one embodiment, is a method for correcting errors in the correlation of a first constituent image and a second constituent image transferred into a composite image at a first and a second correlation offset, respectively. The method includes identifying the first and second constituent images; ascertaining the correlation offset of at least one of the first and second images; and manually correcting the ascertained correlation offset to eliminate the error.

Abstract: A hyperspectral image encoder (10) for compressing hyperspectral imagery includes a differential pulse code modulation (DPCM) loop (26) to perform data decorrelation in the spectral domain and a discrete wavelet transform (DWT) processing means (28) to perform decorrelation in the spatial domain. The DPCM loop (26) determines an error image between a present image at the input of the encoder (10) and a predicted image. The DWT processing means (28) then divides the error image into a plurality of frequency subbands and quantizes information within the subbands in accordance with a plurality of predetermined quantization states to provide a coded output signal. In one embodiment, an interband predictor (24) is provided to predict an image, for use in calculating the error image, using the coded output signal.

Abstract: An original image signal, which represents an original image and are composed of original image signal components representing a plurality of sampling points, that are arrayed at predetermined intervals and in a lattice-like form, is obtained. A judgment is made as to whether an interpolation point belongs to an image edge portion, at which the change in the original image signal is sharp, or belongs to a flat portion, at which the change in the original image signal is unsharp. Interpolating operation processes, one of which is to be employed for the interpolation point, is changed over to each other in accordance with the results of the judgment.

Abstract: A curve length measuring device which processes image data obtained by the photographing of an object to be measured to measure a length of an arbitrary curve on a surface of the object to be measured includes a photographing unit for photographing the object to be measured from two or more different viewpoints to obtain a plurality of image data, a measuring point setting unit for setting, on a photographed image, a measuring point sequence along a curve to be measured, a curved surface calculation unit for setting parabolic half-lines directed from a predetermined reference point at a photographing position of the object to be measured by the photographing unit toward each measuring point sequence set by the measuring point setting unit and interpolating a group of half-lines to obtain a curved surface, an intersection calculation unit for obtaining an intersection between the plurality of said curved surfaces obtained by the curved surface calculation unit, and an intersection length calculation unit for o

Abstract: A communication device is provided wherein a message stored in a message box for a specific individual and a message stored in a general mail box and not addressed to a specific individual can be retrieved sequentially without releasing a line. The communication device includes a personal information output control device that reads personal information stored in a personal information storing device and outputs the personal information via a telecommunication line and a general information output device that reads general information stored in a general information storing device and not addressed to the specific individual and outputs the information via the telecommunication line. The information is output by operating the personal information output control device and the general information output control device according to a request, which is input via the telecommunication line.

Abstract: An electronic processing device receives sets of image data representing respectively sequential three-dimensional digital images of the same region. This device comprises means capable of defining a three-dimensional shape of interest on the basis of at least one of the sets of image data, and of extracting from each set image data representing characteristic points of the shape of interest, processing means for establishing on the basis of the image data of the contours a spatial-temporal planispheric transformation making it possible to pass from characteristic points extracted from one image to the characteristic points extracted from another image of the sequence, and means for displaying selected motion data derived from the parameters of the transformation.

Abstract: An encoder, which comprises a means 40 for embedding a specific electronic mark data in a characteristic part of an image converted to a spatial frequency area, a quantizing means 50 for quantizing the spatial frequency area data in which the electronic mark data is embedded and a variable length encoder 60 for variable length coding the quantizer output, outputs compression coded digital image data. A decoder comprises a variable length decoder 80 and reverse quantizer 90 for restoring compression encoded digital image data to spatial frequency area data, means 120 for detecting the electronic mark data from the restored data, and detection display means 130 for displaying the detection result.

Abstract: A system, method, and software product provide for unsupervised identification of complex, nonlinear subspaces in high dimensional data. The system includes a vector quantization module, a weighted topology representing graph module, and an encoding module. The vector quantization module takes vector data inputs and extracts a group of inputs about a number of cluster centers, using a globally optimized clustering process. The weighted topology representing graph module creates a weighted graph of the vector space, using the cluster centers as nodes, weighting edges between nodes as a function of the density of the vectors between the linked nodes. The encoding module uses the weighted graph to recode the input vectors based on their proximity to the cluster centers and the connectedness of the graph. The recoded vectors are reinput into the vector quantization module, and the process repeated until termination, for example at a limited number of cluster centers.

Abstract: An information processing device of the present invention can be connected to a plurality of external devices by daisy chain format. The external device is provided with DPRAM (Dual Port RAM) and is capable of being connected not only with the information processing device, but also with another external device. DPPRM has an up-load area and an down-load area. DPRAM is able to transfer data in both directions as it is connected with the information processing device and other external devices by duplex bus. One device obtains permission to use DPRAM, writes in a specific address and generates an interrupt signal to the other device. The other device that detected the interrupt signal processes the data referring to DPRAM and transfers the data by releasing the permission to use DPRAM.

Abstract: A hardware architecture for mathematical morphology operations such as dilation and erosion of an image signal is provided. A hardware architecture for an image dilation operation includes: a plurality of adders corresponding to the size of the structuring element for adding the image signal and a structuring element symmetrical to the image signal with respect to the origin to output the result; a plurality of stores for temporarily storing the signals output from the plural adders; a comparator for comparing data stored in the plural stores with feedback data to output the maximum data; and an outputting device for outputting the output signal of the comparator as a dilation operation value if the dilation operation with respect to all structuring elements for one image signal is completed and feeding back the output signal of the comparator as input data of the comparator if not.