Method and system for generating dendritic shrinkage porosity defect simulation image of casting

Abstract

The invention discloses a method for generating a dendritic shrinkage porosity defect simulation image of a casting. The method includes the following steps that (1) an X-ray image of the casting is read in, a framework of a dendritic defect is extracted or drawn manually, weighting is carried out on the framework according to the forming principle of the defect, and three-layer grey distribution of the defect is calculated; (2) reverse geometric spreading is carried out with the framework as an input, and the number of times of reverse geometric spreading is controlled through weight values of framework points; (3) histogram matching is carried out on the image undergoing binaryzation according to the gradient and grey information obtained after calculation; (4) the processed defect image is superposed with a real background image, and spreading is carried out on the defect edge area. According to the method, the defect image of the casting with high randomness is simulated at low calculation cost, and the defects that a CAD model algorithm is high in complexity and high in cost and takes a lot of time are avoided.

Description

technical field [0001] The invention relates to an image automatic generation technology, in particular to a method and system for generating a simulated image of a dendritic shrinkage defect of a casting. Background technique [0002] In order to ensure the quality of castings and improve the safety of products, manufacturers usually need to detect the internal defects of castings, and automatic X-ray inspection equipment is often used. In order to develop automatic casting defect detection algorithms, algorithm developers and testers need a large number of defect samples. In practice, due to the improvement of the manufacturing process level of manufacturers, there are few defects on site, and it takes a long time to obtain sufficient types and quantities of defect samples from the production line, and some types of defects are relatively rare, so sufficient samples and sample diversity cannot be guaranteed. . Therefore, the generation technology of casting defect images...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings and deficiencies of the prior art, the object of the present invention is to provide a method for generating a simulation image of dendritic shrinkage defects of castings, which can simulate casting defect images with higher randomness at a lower calculation cost, and avoid Eliminate the shortcomings of CAD model algorithm complexity, time-consuming, and high cost

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