An improved interpolation algorithm using nearest neighbor from VTK

This paper proposes an improved image interpolation algorithm using nearest neighbor. The algorithm uses the mathematical morphology to determine the contours of each region for the two slicing images, obtains the interpolation image boundary based on distance transform, and then gets the gray values of all the corresponding points through the nearest neighbor image interpolation. This algorithm can greatly reduce the errors caused by nearest neighbor. By the means of VTK, the experimental result shows that the robust algorithm can improve the quality of the reconstruction image.