Sanyo Electric Co., Ltd.

Yukinori Matsumoto

Kazuhide Sugimoto

Tsutomu Arakawa

Hajime Terasaki

Osamu Ota

Yasuhiro Oue

Toru Kitamura

Kouta Fujimura

Nobuya Suzuki

Takeshi Mogi

Kota Fujimura

Osamu Suzuki

Masazumi Katayama

Dieter Ritter

The present method represents a three-dimensional shape model by polygons according to a plurality of object images information picked up by rotating a real object for every arbitrary angle to assign texture information on each polygon from object image information having the largest projection area of the relevant polygon. In order to improve the color continuity between adjacent polygons, the object image information having correspondence between a polygon of interest and an adjacent polygon thereof is selected so as to be the object image information approximating the shooting position and the shooting direction. An alternative method divides an object image into a plurality of regions, obtains difference between an object image and a background image in region level, outputs a mean value of the absolute value of difference in the region level, and detects the region having the mean value of absolute values of difference equal to or greater than a threshold value as the object portion. Another further method obtains a plurality of object images by shooting only a background of an object of interest and by shooting the object of interest during each rotation. A silhouette image is generated by carrying out a difference process between the object image and the background image. A voting process is carried out on the voxel space on the basis of the silhouette image. A polygon is generated according to the three-dimensional shape obtained by the voting process. The texture obtained from the object image is mapped to the polygon.

Texture information assignment method, object extraction method, three-dimensional model generating method, and apparatus thereof

For an apparatus effectively providing a real three-dimensional model to a customer, three-dimensional shape data of a target is obtained at a data input section (). The data is managed by a server which is connected to a network. A suitable formation section () is selected to form a real three-dimensional model based on the data. In addition, the formation completion is automatically notified to the customer via a completion display panel (), a cellular phone (), or the like.

3-D model providing device

A three-dimensional model providing apparatus in which a customer can easily modify the input three-dimensional data. The apparatus comprises an input section () for inputting three-dimensional data, a server section () for managing the processes on the three-dimensional data from input to output, a providing section () for providing three-dimensional data, a communicating section for communicating the three-dimensional data between the input section, server section, and providing section, a receiving section () for receiving instruction contents from the customer, and a converting section () for modifying, processing, or converting the three-dimensional data according to the instruction contents.

3-d model providing device

A three-dimensional shape modeling of a real object that reduces the limitations on the target shape and color. The rough shape of the target object is determined by a silhouette method (which has limitation on the target shape) and, at the same time, the detailed shape of the target object is determined by a triangulation method or the like (which has limitation on the target color). By using both sets of information, the consistency between the rough and detailed shape information are checked. For the portions where the consistency is not satisfied (points where detailed shape information is absent or points where detailed shape section is present outside the rough shape), rough shape is assumed to be the final object information and for other portions, the detailed shape is taken as the final object information. In this manner, three-dimensional shape modeling with reduced limitations on the target shape and color can be performed.

Three-dimensional modeling apparatus, method, and medium, and three-dimensional shape data recording apparatus, method, and medium

A method and apparatus for representing a three-dimensional shape model by polygons according to a plurality of object images information obtained by rotating a real object arbitrary angles to assign texture information on each polygon. The texture information is assigned according to the amount of texture information for a particular polygon. Various criteria are disclosed as factors in determining the amount of texture information.

In order to store texture images in a smaller data amount, there is provided a method for recording a texture recording image which contains a number of texture images in a memory to thereby record the images of the number of texture in the memory. In this method, the texture images are arranged on the texture recording image based on the shape information of each texture such that a region not being occupied by the images can be reduced on the texture recording image

Method for efficiently recording a number of texture images in memory

Method of efficiently recording a number of texture images in memory

A method is proposed for automatically obtaining depth. information from a 2-D motion image, so as to create an image for a 3-D display. Further, methods are proposed for selecting appropriate frames for the calculation of the depth information, or discontinuing the calculation, and for conducting image., processing using the depth information. Examples of various types of image processing can be listed as including the creation of a viewfinder image seen from a different point, natural scaling operations to an image area, and separation of a desired image area. First, a motion information of an object on a screen is extracted by block matching or the like. Second, the actual movement of the object in the 3-D world is calculated. Since the viewfinder image is a projection of a 3-D space, it is possible to obtain the original 3-D movement of the object, based on the movements of a plurality of representative points through an inverse transformation, the representative points being provided in the viewfinder image. Resultantly, 3-D coordinates of this object are identified, so that depth information of the object is obtained. Afterwards, a parallax is calculated based on the depth information, so as to create right and left eye images from the input viewfinder image. Alternatively, image processing, such as separation of an object having a depth within a predetermined range, is carried out based on the depth information.

Methods for creating an image for a three-dimensional display, for calculating depth information and for image processing using the depth information

A reference sheet is employed on which reference points are arranged irregularly and asymmetrically. An object of interest is placed on the reference sheet. The object of interest is shot together with the reference points by a camera. A shooting position of the camera is calculated according to the Hough transform method on the basis of the position of a reference point in the obtained object image. A three-dimensional model is generated according to the obtained object image and shooting position. Therefore, a simple and economic three-dimensional modeling apparatus that does not require a turntable can be provided.

Apparatus and method of three-dimensional modeling

Texture information giving method, object extracting method, three-dimensional model generating method and apparatus for the same

A three-dimensional modeling apparatus capable of producing a three-dimensional model of an object of interest having a recessed part shoots an object of interest from a plurality of visual points, votes density information on a central image and peripheral images among a plurality of obtained object images for a corresponding Voxel in a prepared Voxel space, calculates the standard deviation of the density information voted for each Voxel, and estimates the shape of the object of interest by smoothly coupling Voxels with small standard deviation among the Voxels in the Voxel space.

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Tsukuba, Japan

Yukinori Matsumoto