t = []
    for file in files:
        img = Image.open(file)
        width, height = img.size
        if width >= height:
            roi_width = height_original * 1/2
            roi_height = height_original * 1/2
        elif width < height:
            roi_width = width_original * 1/2
            roi_height = width_original * 1/2

        t.append(findT(img, size=roi_size))
    return t