Numerically-controlled machine tool design module three-dimension model retrieval method based on single image

Abstract

The invention discloses a numerically-controlled machine tool design module three-dimension model retrieval method based on a single image. A user is free of providing a three-dimension model or sketch and is required to input a similar image of the model to be retrieved, and the required numerically-controlled machine tool design module three-dimension model can be retrieved. In the training process, a three-dimension CAD model in a database can be displayed in a multi-view manner, SIFT feature extraction is performed on the multi-view images of the model, SIFT histograms are calculated, and features of feature bags are generated for rapid retrieval. The retrieval segment is divided into two steps, namely rough retrieval and accurate retrieval. The method has the advantages that the problem that conventionally the three-dimension model or sketch is difficult to acquire and serve as the retrieval condition during three-dimension model retrieval on the basis of content is solved, and the user is capable of utilizing the acquired image as the retrieval condition for retrieval easily; meanwhile, by means of the two-step retrieval method, the efficiency and accuracy of the retrieval are guaranteed.

Description

technical field [0001] The invention belongs to the field of content-based three-dimensional model retrieval, and specifically relates to a method for retrieving a three-dimensional model of a CNC machine tool design module using a single image, that is, a user retrieves a database by inputting a similar image of a three-dimensional model of a machine tool module. An intelligent retrieval method to obtain the 3D model of the required machine tool module. Background technique [0002] The design of CNC machine tools based on 3D models has become the mainstream mode of machine tool design in my country. Because the 3D model of machine tools has the characteristics of visualization, digitization and virtualization, it has become an indispensable basic carrier for all aspects of CNC machine tool development. Research and statistical analysis show that , in the design of new machine tool modules, about 40% are reused past modules, about 40% are minor modifications to existing desi...

AI Technical Summary

Problems solved by technology

Two-dimensional sketches are easy to draw and more convenient to use, but because the retrieval effect of using two-dimensional sketches is often not ideal, they are rarely used

3D sketch retrieval is better than 2D sketch retrieval, but the workload of 3D sketch drawing is much larger than that of 2D sketch

The 3D sketch drawing tool is inconvenient to use and has limited functions. It is very difficult to draw a 3D sketch that can accurately express the retrieval intention

[0007] Difficulty obtaining 3D model instances and drawing accurate sketches greatly restrict the development of content-based intelligent model retrieval

The present invention proposes an image-based 3D model retrieval method for CNC machine tool design modules, effectively solving the practical limitations of content-based 3D model retrieval technology

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