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Three-dimensional CAD model similarity retrieval system and method based on image recognition
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An image recognition and similarity technology, which is applied in character and pattern recognition, special data processing applications, instruments, etc., can solve problems such as low work efficiency and difficulty in ensuring work quality, and achieve quality improvement, process design ability, retrieval high efficiency effect
Active Publication Date: 2019-12-10
CAPITAL AEROSPACE MACHINERY +1
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[0004]However, for 3D CAD models, if there is no technical means to efficiently search and retrieve similar models, it mainly depends on the personal experience of the craftsmen, or requires Constantly consult other experienced personnel, the work efficiency is low, and the work quality is difficult to be guaranteed
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Embodiment 1
[0077] A three-dimensional CAD model similarity retrieval system based on image recognition, including a database, a feature recognition module, a similarity calculation module, a similarity retrieval module, and a result display module;
[0078] Store the 3D CAD model and the target 3D CAD model in the database;
[0079] The feature recognition module traverses all the 3D CAD models in the database, identifies the geometric features of each 3D CAD model in at least three view directions, takes them as view feature values, and stores them in the database in association with the corresponding 3D CAD models;
[0080] The similarity calculation module calculates the similarity of any two 3D CAD models in the database according to the view feature value of the 3D CAD model, and stores all the similarity results calculated in the database;
[0081] The similarity retrieval module sorts the similarity results related to the target three-dimensional CAD model in the database;
[008...
Embodiment 2
[0084] A three-dimensional CAD model similarity retrieval system based on image recognition, including a database, a feature recognition module, a similarity calculation module, a similarity retrieval module, and a result display module;
[0085] Store the 3D CAD model and the target 3D CAD model in the database;
[0086] The feature recognition module traverses all the 3D CAD models in the database, identifies the geometric features of each 3D CAD model in at least three view directions, takes them as view feature values, and stores them in the database in association with the corresponding 3D CAD models;
[0087] The similarity calculation module first preprocesses all 3D CAD models in the database, screens out a group of 3D CAD models, and then calculates the similarity between the target 3D CAD model and the screened models, and converts all the calculated similarities to The results are stored in the database;
[0088] The similarity retrieval module sorts according to t...
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Abstract
The invention discloses a three-dimensional CAD model similarity retrieval system and method based on image recognition. The system comprises a database, a feature recognition module, a similarity calculation module, a similarity retrieval module and a result display module. A three-dimensional CAD model and a target three-dimensional CAD model are stored in the database. The feature recognition module traverses all the three-dimensional CAD models in the database, recognizes geometrical features of each three-dimensional CAD model in at least three view directions, takes the geometrical features as view feature values, and stores the view feature values and the corresponding three-dimensional CAD models into the database in an associated manner. The similarity calculation module is used for calculating the similarity of any two three-dimensional CAD models in the database according to the view feature values of the three-dimensional CAD models, and storing all similarity results obtained by calculation in the database. The similarity retrieval module is used for sorting similarity results related to the target three-dimensional CAD model in the database, and the result display module is used for displaying the three-dimensional CAD model similar to the target three-dimensional CAD model and the corresponding similarity according to the similarity sequence obtained by the similarity retrieval module.
Description
technical field [0001] The invention belongs to the technical field of digital manufacturing. Background technique [0002] Although in the product design stage, more and more 3D CAD modeling technology is used to replace the original 2D drawings with 3D CAD models, but in the product process design and product manufacturing links, the reuse of 3D CAD model information is not sufficient However, it is still mainly applied manually by craftsmen, and it has not been realized to carry out related process design work through automatic identification and application of 3D CAD model information, so as to achieve the goal of improving the efficiency and quality of process design. [0003] The process design based on the 3D model is mainly based on the inherited process design. Craftsmen often need to find out whether there are similar products, whether they have carried out process design of similar products, and then complete the process design of new products and new parts by re...
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