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US 7,397,473 B2Granted
Geometry based search method for 3D CAx/PDM repositories
AssigneeGeometric Ltd.
InventorTathagata Chakraborty
Life of this patent
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AssigneeGeometric Ltd.
InventorTathagata Chakraborty
Estimating the term…
Traditional techniques of 3D data retrieval using names and subjective attributes are not robust and are difficult to automate over large 3D repositories. Certain techniques developed for search and classification of 2D engineering designs, are in general, difficult to extend to 3D models. These issues are addressed by a system for automated search and classification for 3D CAx models based on their geometric “shape,” which is often an indication of design, analysis and manufacturing process similarity. A new method and system are provided for representing 3D shape as a composition of multiple 2D image projections, which are transformed using the Discrete Fourier and Harr Wavelet transforms. Key coefficients of the transforms are then stored in the 3D model repository and are used to efficiently search and classify such repositories.
A computer-based method for comparing the geometry of a pair of three-dimensional models, wherein each of the three-dimensional models is comprised of a plurality of three-dimensional surfaces and surface approximations, said method comprising using a computer in carrying out the steps of:
A method for searching for three dimensional models with geometries similar to a given query three-dimensional model, by comparing the geometry of at least one three-dimensional model with that of the query three-dimensional model, said method comprising the steps of:
A computer-readable medium having computer executable instructions stored thereon for execution by a computer for comparing the geometry of a pair of three-dimensional models, wherein each of the three-dimensional models is comprised of a plurality of three-dimensional surfaces and surface approximations, said instructions comprising the steps of:
Dependencies are inferred from the claim text.