Welding Quality Inspection by Digital Radiography

This paper briefly presents a method of inspecting welding lines on the basis of digital radiography. The advanced system based on the amorphous silicon detector was applied to acquire rich original image. And the noise was decreased by averaging the images. Log-calculation was used to show the defects in welding. The defects were amplified by the Unsharp masking algorithm. Then the image quality was improved to the B level the highest in the traditional film.