After I have used your code.
image = Image.open('flowers/test/32/image_05591.jpg')
img = process_image(image)

This happens.
tensor([[[ 1.1015,  1.0331,  0.9474,  ..., -0.4739, -0.5253, -0.4397],
         [ 1.1015,  1.0502,  1.0159,  ..., -0.3541, -0.4911, -0.5253],
         [ 1.1187,  1.0673,  1.0331,  ..., -0.0287, -0.2513, -0.4739],
         ...,
         [-1.3644, -1.3644, -1.3815,  ..., -1.5357, -1.5870, -1.6384],
         [-1.3130, -1.3302, -1.3815,  ..., -1.5528, -1.5870, -1.6213],
         [-1.2959, -1.3644, -1.4500,  ..., -1.6213, -1.6213, -1.6213]],

        [[-1.5280, -1.5455, -1.5455,  ..., -0.1099, -0.0749,  0.0476],
         [-1.5105, -1.5455, -1.5455,  ..., -0.2150, -0.1099, -0.0574],
         [-1.5105, -1.5280, -1.5280,  ..., -0.0749,  0.0826,  0.0826],
         ...,
         [-1.1604, -1.1604, -1.1429,  ..., -1.3179, -1.3704, -1.4580],
         [-1.1078, -1.1078, -1.1604,  ..., -1.3704, -1.4055, -1.4405],
         [-1.0553, -1.1078, -1.1779,  ..., -1.3880, -1.3880, -1.3880]],

        [[-1.3687, -1.3861, -1.3861,  ..., -0.7413, -0.8110, -0.7413],
         [-1.3339, -1.3687, -1.3861,  ..., -0.7413, -0.8110, -0.8633],
         [-1.3339, -1.3513, -1.3687,  ..., -0.5670, -0.6193, -0.7761],
         ...,
         [-1.4733, -1.4907, -1.4907,  ..., -1.5430, -1.5953, -1.6650],
         [-1.4384, -1.4907, -1.5430,  ..., -1.5256, -1.5604, -1.5953],
         [-1.3513, -1.4559, -1.5430,  ..., -1.5430, -1.5256, -1.5256]]])