FFD Algorithm Implementation for Fast Image Registration

Resource Overview

FFD Algorithm for Fast Free-Form Deformation-Based Image Registration

Detailed Documentation

The document mentions that the FFD (Free-Form Deformation) algorithm is employed for implementing fast image registration. This algorithm primarily aligns two images, making it applicable in fields such as medical image processing and computer vision. The FFD algorithm achieves image deformation and alignment through nonlinear transformations using B-spline basis functions. A typical implementation involves defining a control point grid over the image, where the displacement of each pixel is computed through B-spline interpolation of control point displacements. This approach effectively enhances both the accuracy and efficiency of image registration, laying the foundation for subsequent image processing and analysis tasks. Key implementation aspects include optimizing control point spacing for balancing computational cost and deformation flexibility, and using gradient-based optimization methods to minimize similarity metrics between reference and target images.