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公开(公告)号：DE69319823T2
公开(公告)日：1999-03-25
申请号：DE69319823
申请日：1993-09-23
Applicant: IBM
Inventor： NUMAO MASAYUKI , MASUDA HIROSHI , SHIMIZU SHUICHI
Abstract: A method and apparatus for constructing three-dimensional solid models from two-dimensional projections (orthographic views) is provided. An image processing unit prepares a cell decomposition model from three orthographic view data, a link of individual cells C1, C2, C3, C4,... in the prepared cell decomposition model is detailed referring to lines E1, ... represented on the three orthographic views, and a solid model is constructed according to a non-conflicting cell combination.
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公开(公告)号：DE69319823D1
公开(公告)日：1998-08-27
申请号：DE69319823
申请日：1993-09-23
Applicant: IBM
Inventor： NUMAO MASAYUKI , MASUDA HIROSHI , SHIMIZU SHUICHI
Abstract: A method and apparatus for constructing three-dimensional solid models from two-dimensional projections (orthographic views) is provided. An image processing unit prepares a cell decomposition model from three orthographic view data, a link of individual cells C1, C2, C3, C4,... in the prepared cell decomposition model is detailed referring to lines E1, ... represented on the three orthographic views, and a solid model is constructed according to a non-conflicting cell combination.
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公开(公告)号：JPH0896164A
公开(公告)日：1996-04-12
申请号：JP23369594
申请日：1994-09-28
Applicant: IBM JAPAN
Inventor： NUMAO MASAYUKI , MASUDA HIROSHI , MATSUZAWA YASUSHI
Abstract: PURPOSE: To efficiently composite a precise solid model by using drawing data. CONSTITUTION: Closed areas are detected on the basis of shape drawing data to generate a closed area list 100, a tree structure is detected 200, and the list is converted into a symbol group as a set of symbols of elements of the outlines of the closed areas and symbols of connection relations of the elements 300. When the symbol group has a specific symbol, the symbol group is divided into plural symbol groups on the basis of the symbol 400. The symbol group, matching is performed 500 and the attributes, e.g. area of the closed areas are detected 600. The symbol groups are classified into symbol groups of closed areas of the same shape, and the symbol groups are further classified into symbol groups of closed areas of the same area 700. Symbol groups of closed areas having children of the closed areas of the same area of the same shape are selected out of the symbol groups of the closed areas of the same area of the same shape 800 and the solid model is composited 900.
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公开(公告)号：JPH07110872A
公开(公告)日：1995-04-25
申请号：JP24538493
申请日：1993-09-30
Applicant: IBM JAPAN
Inventor： NUMAO MASAYUKI , MASUDA HIROSHI
Abstract: PURPOSE:To synthesize a solid model from one plan view and one or plural cross-sectional drawings by combining resective closed areas solidified by a closed area solidifying means based upon the positional information of respective closed areas. CONSTITUTION:A drawing sorting means 600 sorts inputted two-dimensional drawing data into plan data and sectional drawing data. A closed area recognizing means 700 groups closed areas having the same attribute based upon the attributes of detected closed areas. An area solidifying means 800 divides the sectional drawing data based upon the data of each detected closed area, solidifies the closed area based upon, the divided sectional drawing data and solidifies a closed area other than the solidified closed area and belonging to the same group as the solidified closed area by the same method as the solidified closed area. A solid model synthesizing means 900 synthesizes a solid model by combining respective solidified closed areas based upon the positional information of respective detected closed areas.
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公开(公告)号：JPH0749960A
公开(公告)日：1995-02-21
申请号：JP18424493
申请日：1993-07-26
Applicant: IBM JAPAN
Inventor： MASUDA HIROSHI , NUMAO MASAYUKI
Abstract: PURPOSE:To produce a solid model based on plural incomplete drawings. CONSTITUTION:The segments and curves of three drawings are calculated from the two-dimensional data on these drawings, and a wire frame model is produced based on those calculated segments and curves. The edge line of the wire frame model is compared with the segments or curves for correction of the frame model. Then the corrected wire frame model is converted into a sell division model. The conditions that correct at least one of three drawings are set by a Boolean equation, and a solid model is synthesized based on the combination of cells, i.e., the solution of the equation. When no solution is obtained from the equation, the candidate models are synthesized based on the optional combinations of cells. These candidate models are displayed in the order of higher resemblance. Meanwhile a candidate model is selected by an operator as a solid model when plural combinations of cells are obtained as the solutions. Then, three drawings are newly produced for the acquired solid model, and the original three drawings are completed based on these new drawings.
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Patent Agency Ranking
公开(公告)号：JPH1139511A
公开(公告)日：1999-02-12
申请号：JP19681197
申请日：1997-07-23
Applicant: IBM
Inventor： MASUDA HIROSHI , AONO MASAKI , OBUCHI RYUTARO
Abstract: PROBLEM TO BE SOLVED: To perform the non-loss data compression of three-dimensional shape models including a solid model and a surface model by executing a phase deformation operation to the three-dimensional shape model of a compression object and generating a triangle mesh. SOLUTION: The phase deformation operation is executed to the phase data of the three-dimensional shape model and the triangle mesh is generated (S110). It is compressed and compressed phase data are generated (S120). Also, operation relating data relating to the phase deformation operation are prepared (S130). Finally, the compressed phase data and the operation relating data are transmitted (S140). On the other hand, as an opposite processing, the compressed phase data and the operation relating data are received first, the compressed phase data are defrosted, the triangle mesh is restored, the operation of eliminating unrequired vertexes/sides or the like is executed by using the operation relating data and the phase data are restored. Since geometrical calculation using a coordinate value is not performed at all, triangle division is accelerated and an effect capable of performing the triangle division without being affected by coordinate value errors is presented.
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公开(公告)号：JPH0896166A
公开(公告)日：1996-04-12
申请号：JP23191194
申请日：1994-09-27
Applicant: IBM JAPAN
Inventor： MASUDA HIROSHI , MATSUZAWA YASUSHI
Abstract: PURPOSE: To extract only proper candidate segments by comparing extracted two-dimensional coordinates on a top view and a front view with each other and regarding one combination of coordinate values as the two-dimensional coordinates of a candidate vertex on a side view when the other combination of coordinate values determined by the relation between both the views are equal. CONSTITUTION: When the X-coordinate values on the top view and front view are equal, the two-dimensional coordinates (Y-coordinate value on the top view and Y-coordinate value on the front view) are regarded as the two-dimensional coordinates of the candidate vertex on the side view. The coordinates on the respective drawings, however, are determined by mutually crossing axes of projection planes M1 , M2 , and M3 . Namely, the top view contains the intersection line of the projection planes M1 and M2 as its X axis (X1 ) and the intersection line of the projection planes M1 and M3 as its Y axis (Y1 ), the front view contains the intersection line of the projection planes M1 and M2 as its X axis (X2 ) and the intersection line of the projection planes M2 and M3 as its Y axis (Y2 ), and the side view has the intersection line of the projection planes M1 and M3 as its X axis (X3 ) and the intersection line of the projection planes M2 and M3 as its Y axis (Y3 ). Then the segment constituted by connecting two candidate vertexes is extracted as a candidate segment.
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公开(公告)号：JPH07175507A
公开(公告)日：1995-07-14
申请号：JP31854593
申请日：1993-12-17
Applicant: IBM JAPAN
Inventor： INOUE KEISUKE , MASUDA HIROSHI , OKANO AKIRA
IPC: G05B19/4069 , G06F19/00 , G06Q50/00 , G06Q50/04 , G05B19/4068 , G06F17/00
Abstract: PURPOSE:To make it easy for an operator to find an optimum cutting procedure through an interactive processing by holding the result of cutting as nonmanifold body data structure. CONSTITUTION:A storage device 600 being a magnetic disk stores a tool data base file which contains data on the sizes and shapes of various tools, a tool path data file which contains tool paths, a nonmanifold border representation data file which contains data used to calculate a nonmanifold body model, and a data file which contains corresponding procedure relation between cells and basic solids. It is made easy by using this to calculate the total volume of substantial cells halfway in cutting and displays halfway shapes; when cutting simulation is performed while cutting procedures are changed, geometrical set arithmetic need not be done again and logical operation may be small in calculation quantity for each list of basic solids of each cell, thereby easily obtaining a cutting procedure for alteration.
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公开(公告)号：JPH10334272A
公开(公告)日：1998-12-18
申请号：JP13730597
申请日：1997-05-27
Applicant: IBM JAPAN
Inventor： MASUDA HIROSHI , OBUCHI RYUTARO , AONO MASAKI
IPC: G06F12/14 , G06F21/10 , G06F21/16 , G06F21/60 , G06T17/00 , G06T17/10 , G09C5/00 , H04N1/387 , H04N7/08 , H04N7/081
Abstract: PROBLEM TO BE SOLVED: To embed various information into a three-dimensional shape model and also to extract these embedded information. SOLUTION: This method changes the geometric parameters of a three- dimensional shape model to embed various information into the shape model in a visible or invisible state. The geometric parameters are equivalent to descriptions to define a geometric shape. The three-dimensional shape model usually consists of the polyhedrons, straight lines, a set of points or curved surfaces, i.e., its primitives (component elements), and each primitive is defined by a geometric parameter. Thereby, a three-dimensional shape model is defined by a set of many geometric parameters in regard to its entire geographic shape. The information is embedded in this system by changing the geometric parameters of plural primitives forming a three-dimensional shape model. Meanwhile, the geometric parameters are divided into numeric parameters and phases and varied for embedding the information. Then the varied geographic parameters are detected for extraction of the embedded information.
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公开(公告)号：JPH06119463A
公开(公告)日：1994-04-28
申请号：JP26865092
申请日：1992-10-07
Applicant: IBM JAPAN
Inventor： NUMAO MASAYUKI , MASUDA HIROSHI , SHIMIZU SHUICHI
Abstract: PURPOSE:To shorten preparation time and to simplify selection processing by evaluating whether or not there is any conflict in the adjacent relation of cells, assembling the respective cells based on the combination of cells having no conflict, and synthesizing a solid model. CONSTITUTION:Concerning the cell dividing model, in order to make a ridge line e1 existent, there are conditions that the ridge line e1 is made correspondent to a ridge line E1 of three drawings, the surfaces of any two cells among cells C1-C3 provided with the ridge line e1 cross (are not existent on the same plane) and only one cell is provided with the ridge line e1. Assuming that each cell is existent, a Boolean equation is applied as a normalizing formula so as to evaluate and calculate the combination (analysis) of assumption having no conflict. Based on the combination of cells having no conflict provided like this, the respective cells in the cell dividing model are selected and assembled, and several solid model candidates corresponding to a three-plane drawing are synthesized.
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