Image Registration Improved by Generative Adversarial Networks

The performances of most image registrations will decrease if the quality of the image to be registered is poor, especially contaminated with heavy distortions such as noise, blur, and uneven degradation. To solve this problem, a generative adversarial networks (GANs) based approach and the specified loss functions are proposed to improve image quality for better registration. Specifically, given the paired images, the generator network enhances the distorted image and the discriminator network compares the enhanced image with the ideal image. To efficiently discriminate the enhanced image, the loss function is designed to describe the perceptual loss and the adversarial loss, where the former measures the image similarity and the latter pushes the enhanced solution to natural image manifold. After enhancement, image features are more accurate and the registrations between feature point pairs will be more consistent.