Blowhole Detection Based on Bidirectional Enhancement and Omnidirectional Analysis for X-Ray Inspection of Castings

Abstract EN

Small blurred blowholes are difficult to detect, especially those in castings having a complex structure.

In this paper, we propose a blowhole detection method based on bidirectional enhancement and omnidirectional analysis for X-ray inspection of castings.

After obtaining the X-ray images of a casting from the X-ray inspection equipment, there are two main processes to detect the blowholes.

First, in the extraction process for the potential defect region, we propose a method based on bidirectional enhancement that highlights the blurred defects and models the nondefective structure.

Second, in the precise defect identification process, we propose a method to distinguish real defects by 3D model fitting-based omnidirectional analysis.

The experimental results indicate that the proposed method has a higher performance in blowhole detection than comparable methods.