有什么方法可以将图像上的文本居中（Python/PIL）？

Question

Here is my code:

from PIL import Image, ImageDraw, ImageFont
import names

name = names.get_first_name(gender="male")

template = Image.open("imgs/banner.png")
font_type = ImageFont.truetype("arial.ttf", 40)
draw = ImageDraw.Draw(template)
draw.text(xy=(50, 50), text=f"Hello, {name}", fill=(255, 255, 255), font=font_type)
template.save(f"banner-{name}.png")

I would like to middle the text.

Thats my "template" ( original url ):

Answer 1

Here I improved your code to do what you want:

Try it online!

from PIL import Image, ImageDraw, ImageFont
import names

name = names.get_first_name(gender="male")

template = Image.open("banner.png")
font_type = ImageFont.truetype("arial.ttf", 40)
draw = ImageDraw.Draw(template)
text = f"Hello, {name}"
text_size = font_type.getsize(text)
draw.text(xy=(
    (template.size[0] - text_size[0]) // 2, (template.size[1] - text_size[1]) // 2),
    text=text, fill=(255, 255, 255), font=font_type)
template.save(f"banner-{name}.png")

Output:

Answer 2

An alternative approach to the one suggested by Arty is to use the anchor parameter implemented in Pillow 8. See the Pillow documentation on text anchors for more information. In short, the value 'mm' can be used to both horizontally and vertically align the text around the coordinates filled in to the xy argument.

draw.text(xy=(template.width / 2, template.height / 2),
          text=f"Hello, {name}", fill=(255, 255, 255), font=font_type,
          anchor='mm')