ValueError

(cv) pi@raspberrypi:~/rbp_dnn $ python3 RBP_DL15_MNIST_PiCamera.py  실행 에러

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/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/picamera/encoders.py:544: PiCameraResolutionRounded: frame size rounded up from 300x300 to 304x304

  width, height, fwidth, fheight)))

Traceback (most recent call last):

  File "RBP_DL15_MNIST_PiCamera.py", line 78, in <module>

    result = model.predict(np.array([num]))

  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training.py", line 909, in predict

    use_multiprocessing=use_multiprocessing)

  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 462, in predict

    steps=steps, callbacks=callbacks, **kwargs)

  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 396, in _model_iteration

    distribution_strategy=strategy)

  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_v2.py", line 594, in _process_inputs

    steps=steps)

  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training.py", line 2472, in _standardize_user_data

    exception_prefix='input')

  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/training_utils.py", line 565, in standardize_input_data

    'with shape ' + str(data_shape))

ValueError: Error when checking input: expected conv2d_1_input to have 4 dimensions, but got array with shape (1, 28, 28)

에러 어디서 부터 참조해서 해결을 해야 하나요.