There isn’t a single AI that makes an image realistic. Instead, different AI techniques are used to make images more realistic depending on the specific application and goal of the image.
For instance, machine learning algorithms are used for image recognition, classification, and segmentation, which can help in creating more realistic images by detecting and manipulating objects, backgrounds, and colors in the image. On the other hand, computer vision techniques, such as object detection and tracking, can be used to add depth and realism to an image, particularly in applications such as augmented reality or virtual reality.