python 3.x - How can i reshape an array from (280, 280, 3) to (28, 28, 3)

Question

Hi i tried to write a code, where i write a number on the screen with pygame and then a neural Network predicts the number i wrote. My problem is that i trained my neural network with image arrays in a (28, 28, 3). So i tried to reshape my (280, 280, 3) array. but when i do so my array is None. I use Python 3.7

string_image = pygame.image.tostring(screen, 'RGB')
temp_surf = pygame.image.fromstring(string_image, (280, 280), 'RGB')
array = pygame.surfarray.array3d(temp_surf)
array = array.resize((28, 28, 3))

Can anyone help?

Answer 1

If you just want to scale a pygame.Surface, then I recommend to use pygame.transform.scale() or pygame.transform.smoothscale().

For instance:

temp_surf = pygame.image.fromstring(string_image, (280, 280), 'RGB')
scaled_surf = pygame.transform.smoothscale(temp_surf, (28, 28))
array = pygame.surfarray.array3d(scaled_surf)