GPU-based Arbitrary Clipping Rendering Algorithm for 3D Images of the Industrial Computerized Tomography

In the process of non-destructive testing, its an important approach to explore information from the 3D images of the industrial computerized tomography(ICT). In order to observing the arbitrary clipping and getting information of the 3D images, a GPU-based arbitrary clipping rendering algorithm is developed. By calculating dot metrix between the position of voxel and the parameter of clipping plane with the single instruction multiple data(SIMD) instruction of the graphics processing unit(GPU), this algorithm determines the relationship between voxel and the plane, and then modifies the voxels transparence in parallel. According to the dot metrix value, the transparences of voxels outside the plane are set into zero, which makes them no contributions to the result, thus the arbitrary clipping plane is rendered finally. Our approach can also fulfill multiple plane clipping and clipping combined with transfer function. Its proved that this approach carries the point for interaction and satisfies the application of non-destructive testing process.