Abstract: The present Invention provides a sign object presentation system which selects object data for a three-dimensional object, linking the object data with a plurality of sign data for a sign object, and selects proper sign data out of the plurality of sign data based on presentation information for the object data; and displays the three-dimensional object with the selected sign data located at a predetermined position of the three dimensional object.

Abstract: On embedding electronic watermark data in point group data obtained from a three-dimensional measurement, an x-y plane region defining the point group data is divided into a plurality of small regions so that a point group is produced with respect to each of small regions. The coordinate values of each point group are offset with making a barycenter of the point group be an origin point. A discrete Fourier transform is carried out in order to produce a Fourier coefficient sequence, which is modified into a watermarked Fourier coefficient sequence. The inverse discrete Fourier transform is carried out on the watermarked coefficient sequence in order to produce a watermarked complex number sequence. An optimum watermark embedding strength is calculated. On the basis of the embedding strength, the Fourier coefficient sequence is modified to produce a watermarked Fourier coefficient sequence which is inversely offset into the watermarked point group data.

Abstract: In the method of obtaining captures images, there is overlaps in images in the flight direction and in a direction (cross direction) that crosses the flight direction. A predetermined number of the captured images containing overlapping sections that include a target point are selected out of the obtained images in the flight direction and/or the cross direction. From the overlap sections of these captured images, selected images are obtained by selecting image sections within a specific range that contains the target point. Using the flight direction and the cross direction as axes for a matrix, the selected images are arranged to create an aerial photograph data set.

Abstract: On embedding electronic watermark data in point group data obtained from a three-dimensional measurement, an x-y plane region defining the point group data is divided into a plurality of small regions so that a point group is produced with respect to each of small regions. The coordinate values of each point group are offset with making a barycenter of the point group be an origin point. A discrete Fourier transform is carried out in order to produce a Fourier coefficient sequence, which is modified into a watermarked Fourier coefficient sequence. The inverse discrete Fourier transform is carried out on the watermarked coefficient sequence in order to produce a watermarked complex number sequence. An optimum watermark embedding strength is calculated. On the basis of the embedding strength, the Fourier coefficient sequence is modified to produce a watermarked Fourier coefficient sequence which is inversely offset into the watermarked point group data.

Abstract: A method of producing aerial photograph data is provided which is capable of positively utilizing stored photograph data and an image of a desired object included in a photographed image. The method includes a step of determining a distance between a position of a virtual photographic principal point (virtual photographic principal point position) obtained by the use of spatial position information of a target point and spatial direction of a view vector and a position of an actual photographic principal point (actual photographic principal point position) of each of a plurality of aerial photographs to automatically select a specific aerial photograph, and a step of extracting, from the specific aerial photograph, a selected image having the target point arranged at a predetermined position therein.

Abstract: On embedding electronic watermark data in point group data obtained from a three-dimensional measurement, an x-y plane region defining the point group data is divided into a plurality of small regions so that a point group is produced with respect to each of small regions. The coordinate values of each point group are offset with making a barycenter of the point group be an origin point. A discrete Fourier transform is carried out in order to produce a Fourier coefficient sequence, which is modified into a watermarked Fourier coefficient sequence. The inverse discrete Fourier transform is carried out on the watermarked coefficient sequence in order to produce a watermarked complex number sequence. An optimum watermark embedding strength is calculated. On the basis of the embedding strength, the Fourier coefficient sequence is modified to produce a watermarked Fourier coefficient sequence which is is inversely offset into the watermarked point group data.

Abstract: The present Invention provides a sign object presentation system which selects object data for a three-dimensional object, linking the object data with a plurality of sign data for a sign object, and selects proper sign data out of the plurality of sign data based on presentation information for the object data; and displays the three-dimensional object with the selected sign data located at a predetermined position of the three dimensional object.

Abstract: A method of producing aerial photograph data is provided which is capable of positively utilizing stored photograph data and an image of a desired object included in a photographed image. The method includes a step of determining a distance between a position of a virtual photographic principal point (virtual photographic principal point position) obtained by the use of spatial position information of a target point and spatial direction of a view vector and a position of an actual photographic principal point (actual photographic principal point position) of each of a plurality of aerial photographs to automatically select a specific aerial photograph, and a step of extracting, from the specific aerial photograph, a selected image having the target point arranged at a predetermined position therein.

Abstract: In the method of obtaining captures images, there is overlaps in images in the flight direction and in a direction (cross direction) that crosses the flight direction. A predetermined number of the captured images containing overlapping sections that include a target point are selected out of the obtained images in the flight direction and/or the cross direction. From the overlap sections of these captured images, selected images are obtained by selecting image sections within a specific range that contains the target point. Using the flight direction and the cross direction as axes for a matrix, the selected images are arranged to create an aerial photograph data set.

Abstract: The invention provides a vehicle for evaluating the properties of road surfaces wherein a road surface cross-section profile evaluating means, a crack-evaluating means, and a road surface longitudinal profile evaluating means are mounted on a predetermined vehicle. The measuring intervals of the respective means can be controlled in accordance with a signal from a single speedometer/range finder. Three kinds of road surface property values which are matched with each other can be obtained. Even if the evaluation system (evaluation vehicle) and the object system (road surface) have a relative speed, the road surface property values can be accurately determined irrespective of the relative speed. Therefore, accurate and reliable evaluation data can be obtained, and the vehicle can cope with high speed and heavy traffic.