Neural Style Transfer (NST) is a process that uses CNNs to blend the content and style of two images.VGG-19, a 19-layer deep CNN, is commonly used in NST. Its pre-trained model parameters are frozen.Activation features of the content and style images are extracted using specific layers of the VGG-19 model.Gram matrix, capturing relationships between feature maps, is used to represent style elements like color and texture.