Creates image input op.
        :param camera_parameters: Parameters for visual observation from BrainInfo.
        :param name: Desired name of input op.
        :return: input op.

def create_visual_input(camera_parameters, name):
        """
        Creates image input op.
        :param camera_parameters: Parameters for visual observation from BrainInfo.
        :param name: Desired name of input op.
        :return: input op.
        """
        o_size_h = camera_parameters['height']
        o_size_w = camera_parameters['width']
        bw = camera_parameters['blackAndWhite']

        if bw:
            c_channels = 1
        else:
            c_channels = 3

        visual_in = tf.placeholder(shape=[None, o_size_h, o_size_w, c_channels], dtype=tf.float32,
                                   name=name)
        return visual_in