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

Figure 4

The grayscale images and the 3D surface plots of typical segments: (a–d) images of the real defects and (e–h) images of the false defects. The images on the left of each part are the grayscale images. The images on the right of each part are the 3D surface plot.

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