Hands-On Image Processing with Python

Computing the style cost

We first need to compute the style, or Gram matrix, by computing the matrix of dot products from the unrolled filter matrix.

The style loss for the hidden layer a can be represented as the following:

We want to minimize the distance between the Gram matrices for the images S and G. The overall weighted style loss (which we want to minimize) is represented as the following:

Here, λ represents the weights for different layers. Bear the following in mind:

• The style of an image can be represented using the Gram matrix ...