Python Reportlab插入图像base64颜色正在反转

from reportlab.lib.pagesizes import letter
from reportlab.pdfgen import canvas
from reportlab.lib.utils import ImageReader
from PIL import Image, ImageOps
import base64

# 创建PDF文档
pdf = canvas.Canvas("output.pdf", pagesize=letter)

# base64编码的图像数据
base64_image = "base64_image_data"

# 将base64编码的图像转换为二进制数据
image_data = base64.b64decode(base64_image)

# 反转图像颜色
image = Image.open(io.BytesIO(image_data))
inverted_image = ImageOps.colorize(image.convert("L"), "#ffffff", "#000000")

# 插入反转后的图像
pdf.drawImage(ImageReader(inverted_image), x=100, y=100, width=200, height=200)

# 保存PDF文档
pdf.save()