如何制作进度条并将其放在图像上？

from PIL import Image, ImageDraw

def create_progress_bar(image_path, progress):
    # 加载图像
    image = Image.open(image_path)
    draw = ImageDraw.Draw(image)

    # 确定进度条位置和大小
    bar_width = int(image.width * 0.8)
    bar_height = 10
    bar_x = (image.width - bar_width) // 2
    bar_y = image.height - 20

    # 计算进度条长度
    progress_width = int(bar_width * progress)

    # 创建进度条矩形
    bar_rectangle = [(bar_x, bar_y), (bar_x + progress_width, bar_y + bar_height)]

    # 根据进度设置颜色
    if progress < 0.5:
        bar_color = (0, 255, 0)  # 绿色
    else:
        bar_color = (255, 0, 0)  # 红色

    # 绘制进度条
    draw.rectangle(bar_rectangle, fill=bar_color)

    # 保存处理后的图像
    output_path = "output.jpg"
    image.save(output_path)
    return output_path