75c9e8cbcd9da21591cd5f8aaaa99205f48fa606,keras_preprocessing/image/image_data_generator.py,ImageDataGenerator,fit,#ImageDataGenerator#Any#Any#Any#Any#,905

Before Change

                raise ImportError("Using zca_whitening requires SciPy. "
                                  "Install SciPy.")
            flat_x = np.reshape(
                x, (x.shape[0], x.shape[1] * x.shape[2] * x.shape[3]))
            sigma = np.dot(flat_x.T, flat_x) / flat_x.shape[0]
            u, s, _ = linalg.svd(sigma)
            s_inv = 1. / np.sqrt(s[np.newaxis] + self.zca_epsilon)
            self.principal_components = (u * s_inv).dot(u.T)

After Change

            x /= (self.std + 1e-6)

        if self.zca_whitening:
            n = len(x)
            flat_x = np.reshape(x, (n, -1))

            u, s, _ = np.linalg.svd(flat_x.T, full_matrices=False)
            s_inv = np.sqrt(n) / (s + self.zca_epsilon)

Instances