from PIL import Image
import numpy as np


def preprocess_func(img_file_path, input_batch_size, input_channel, input_height, input_width):
    image = Image.open(img_file_path).convert("RGB")
    image = image.resize((input_width, input_height), Image.BILINEAR)

    np_data = np.array(image, dtype="float32")
    np_data = np_data.transpose(2, 0, 1)
    np_data = np_data.reshape(
        input_batch_size,
        input_channel,
        input_height,
        input_width,
    )

    np_data = np_data / 256.0
    np_data = np_data - 0.5

    return np_data