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# Creating list of image and mask path
all_val_img = np.array(sorted([os.path.join(VAL_DIR,i) for i in os.listdir(VAL_DIR)]))
all_val_mask = np.array(sorted([os.path.join(VAL_MASK_DIR,i) for i in os.listdir(VAL_MASK_DIR)]))
# doing tf.data.Dataset
val_data = tf.data.Dataset.from_tensor_slices((all_val_img, all_val_mask))
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#mapping the function
val_data = val_data.map(make_image)
Hinweis: Beides Bild und Maske müssen auf die gleiche Weise erweitert werden.